+++ /dev/null
-
-Announce: Release of PyGreSQL version 3.3
-=========================================
-
-PyGreSQL v3.3 has been released.
-It is available at: ftp://ftp.druid.net/pub/distrib/PyGreSQL.tgz. If
-you are running NetBSD, look in the packages directory under databases.
-There is also a package in the FreeBSD ports collection.
-
-From March 1 2001 the PyGreSQL development has moved into the PostgreSQL
-development tree.
-
-PostgreSQL is a database system derived from Postgres4.2. It conforms
-to (most of) ANSI SQL and offers many interesting capabilities (C
-dynamic linking for functions or type definition, etc.). This package
-is copyright by the Regents of the University of California, and is
-freely distributable.
-
-Python is an interpreted programming language. It is object oriented,
-simple to use (light syntax, simple and straightforward statements), and
-has many extensions for building GUIs, interfacing with WWW, etc. An
-intelligent web browser (HotJava like) is currently under development
-(November 1995), and this should open programmers many doors. Python is
-copyrighted by Stichting S Mathematisch Centrum, Amsterdam, The
-Netherlands, and is freely distributable.
-
-PyGreSQL is a python module that interfaces to a PostgreSQL database. It
-embeds the PostgreSQL query library to allow easy use of the powerful
-PostgreSQL features from a Python script.
-
-This release fixes a few bugs, adds a few minor features and makes a
-few speedups in the code.
-
-The next release (unless serious bugs are found) will be to match PyGreSQL
-to version 2.0 of Python.
-
-See the other changes below or in the Changelog file.
-
-PyGreSQL 2.0 was developed and tested on a NetBSD 1.3_BETA system. It
-is based on the PyGres95 code written by Pascal Andre,
-andre@chimay.via.ecp.fr. I changed the version to 2.0 and updated the
-code for Python 1.5 and PostgreSQL 6.2.1. While I was at it I upgraded
-the code to use full ANSI style prototypes and changed the order of
-arguments to connect. Later versions are fixes and enhancements to that.
-The latest version of PyGreSQL works with Python 1.5.2 and PostgreSQL 7.0.x
-
-Important changes from PyGreSQL 3.2 to PyGreSQL 3.3
- - Added NUMERICOID to list of returned types. This fixes a bug when
- returning aggregates in the latest version of PostgreSQL.
-
-Important changes from PyGreSQL 3.1 to PyGreSQL 3.2
- Note that there are very few changes to PostgreSQL between 3.1 and
- 3.2. The main reason for the release is the move into the PostgreSQL
- development tree. Even the WIN32 changes are pretty minor.
- - Add WIN32 support (gerhard@bigfoot.de)
- - Fix some DB-API quoting problems (niall.smart@ebeon.com)
- - Moved development into PostgreSQL development tree.
-
-Important changes from PyGreSQL 3.0 to PyGreSQL 3.1
- - Fix some quoting functions. In particular handle NULLs better.
- - Use a method to add primary key information rather than direct
- manipulation of the class structures.
- - Break decimal out in _quote (in pg.py) and treat it as float.
- - Treat timestamp like date for quoting purposes.
- - Remove a redundant SELECT from the get method speeding it, and insert
- since it calls get, up a little.
- - Add test for BOOL type in typecast method to pgdbTypeCache class.
- (tv@beamnet.de)
- - Fix pgdb.py to send port as integer to lower level function
- (dildog@l0pht.com)
- - Change pg.py to speed up some operations
- - Allow updates on tables with no primary keys.
-
-Important changes from PyGreSQL 2.4 to PyGreSQL 3.0:
- - Remove strlen() call from pglarge_write() and get size from object.
- (Richard@Bouska.cz)
- - Add a little more error checking to the quote function in the wrapper
- - Add extra checking in _quote function
- - Wrap query in pg.py for debugging
- - Add DB-API 2.0 support to pgmodule.c (andre@via.ecp.fr)
- - Add DB-API 2.0 wrapper pgdb.py (andre@via.ecp.fr)
- - Correct keyword clash (temp) in tutorial
- - Clean up layout of tutorial
- - Return NULL values as None (rlawrence@lastfoot.com) (WARNING: This
- will cause backwards compatibility issues.)
- - Change None to NULL in insert and update
- - Change hash-bang lines to use /usr/bin/env
- - Clearing date should be blank (NULL) not TODAY
- - Quote backslashes in strings in _quote (brian@CSUA.Berkeley.EDU)
- - Expanded and clarified build instructions (tbryan@starship.python.net)
- - Make code thread safe (Jerome.Alet@unice.fr)
- - Add README.distutils (mwa@gate.net & jeremy@cnri.reston.va.us)
- - Many fixes and increased DB-API compliance by chifungfan@yahoo.com,
- tony@printra.net, jeremy@alum.mit.edu and others to get the final
- version ready to release.
-
-Important changes from PyGreSQL 2.3 to PyGreSQL 2.4:
- - Insert returns None if the user doesn't have select permissions
- on the table. It can (and does) happen that one has insert but
- not select permissions on a table.
- - Added ntuples() method to query object (brit@druid.net)
- - Corrected a bug related to getresult() and the money type
- - Corrected a bug related to negative money amounts
- - Allow update based on primary key if munged oid not available and
- table has a primary key
- - Add many __doc__ strings. (andre@via.ecp.fr)
- - Get method works with views if key specified
-
-Important changes from PyGreSQL 2.2 to PyGreSQL 2.3:
- - connect.host returns "localhost" when connected to Unix socket
- (torppa@tuhnu.cutery.fi)
- - Use PyArg_ParseTupleAndKeywords in connect() (torppa@tuhnu.cutery.fi)
- - fixes and cleanups (torppa@tuhnu.cutery.fi)
- - Fixed memory leak in dictresult() (terekhov@emc.com)
- - Deprecated pgext.py - functionality now in pg.py
- - More cleanups to the tutorial
- - Added fileno() method - terekhov@emc.com (Mikhail Terekhov)
- - added money type to quoting function
- - Compiles cleanly with more warnings turned on
- - Returns PostgreSQL error message on error
- - Init accepts keywords (Jarkko Torppa)
- - Convenience functions can be overridden (Jarkko Torppa)
- - added close() method
-
-Important changes from PyGreSQL 2.1 to PyGreSQL 2.2:
- - Added user and password support thanks to Ng Pheng Siong <ngps@post1.com>
- - Insert queries return the inserted oid
- - Add new pg wrapper (C module renamed to _pg)
- - Wrapped database connection in a class.
- - Cleaned up some of the tutorial. (More work needed.)
- - Added version and __version__. Thanks to thilo@eevolute.com for
- the suggestion.
-
-Important changes from PyGreSQL 2.0 to PyGreSQL 2.1:
- - return fields as proper Python objects for field type
- - Cleaned up pgext.py
- - Added dictresult method
-
-Important changes from Pygres95 1.0b to PyGreSQL 2.0:
- - Updated code for PostgreSQL 6.2.1 and Python 1.5.
- - Reformatted code and converted to ANSI .
- - Changed name to PyGreSQL (from PyGres95.)
- - Changed order of arguments to connect function.
- - Created new type pgqueryobject and moved certain methods to it.
- - Added a print function for pgqueryobject
- - Various code changes - mostly stylistic.
-
-For more information about each package, please have a look to their
-web pages:
- - Python : http://www.python.org/
- - PostgreSQL : http://www.PostgreSQL.org/
- - PyGreSQL : http://www.druid.net/pygresql/
-
-
-D'Arcy J.M. Cain
-darcy@druid.net
-
-
+++ /dev/null
-PyGreSQL changelog.
-===================
-
-This software is copyright (c) 1995, Pascal Andre (andre@via.ecp.fr)
-Further copyright 1997, 1998 and 1999 by D'Arcy J.M. Cain (darcy@druid.net)
-See file README for copyright information.
-
-Version 3.3
- A few cleanups. Mostly there was some confusion about the latest version
- and so I am bumping the number to keep it straight.
- - Added NUMERICOID to list of returned types. This fixes a bug when
- returning aggregates.
-
-Version 3.2
- - Add WIN32 support (gerhard@bigfoot.de)
- - Fix some DB-API quoting problems (niall.smart@ebeon.com)
- - Moved development into PostgreSQL development tree.
-
-Version 3.1
- - Fix some quoting functions. In particular handle NULLs better.
- - Use a method to add primary key information rather than direct
- manipulation of the class structures.
- - Break decimal out in _quote (in pg.py) and treat it as float.
- - Treat timestamp like date for quoting purposes.
- - Remove a redundant SELECT from the get method speeding it, and insert
- since it calls get, up a little.
- - Add test for BOOL type in typecast method to pgdbTypeCache class.
- (tv@beamnet.de)
- - Fix pgdb.py to send port as integer to lower level function
- (dildog@l0pht.com)
- - Change pg.py to speed up some operations
- - Allow updates on tables with no primary keys.
-
-Version 3.0
- - Remove strlen() call from pglarge_write() and get size from object.
- (Richard@Bouska.cz)
- - Add a little more error checking to the quote function in the wrapper
- - Add extra checking in _quote function
- - Wrap query in pg.py for debugging
- - Add DB-API 2.0 support to pgmodule.c (andre@via.ecp.fr)
- - Add DB-API 2.0 wrapper pgdb.py (andre@via.ecp.fr)
- - Correct keyword clash (temp) in tutorial
- - Clean up layout of tutorial
- - Return NULL values as None (rlawrence@lastfoot.com)
- - Change None to NULL in insert and update
- - Change hash-bang lines to use /usr/bin/env
- - Clearing date should be blank (NULL) not TODAY
- - Quote backslashes in strings in _quote (brian@CSUA.Berkeley.EDU)
- - Expanded and clarified build instructions (tbryan@starship.python.net)
- - Make code thread safe (Jerome.Alet@unice.fr)
- - Add README.distutils (mwa@gate.net & jeremy@cnri.reston.va.us)
- - Many fixes and increased DB-API compliance by chifungfan@yahoo.com,
- tony@printra.net, jeremy@alum.mit.edu and others to get the final
- version ready to release.
-
-Version 2.4
- - Insert returns None if the user doesn't have select permissions
- on the table. It can (and does) happen that one has insert but
- not select permissions on a table.
- - Added ntuples() method to query object (brit@druid.net)
- - Corrected a bug related to getresult() and the money type
- - Corrected a bug related to negative money amounts
- - Allow update based on primary key if munged oid not available and
- table has a primary key
- - Add many __doc__ strings. (andre@via.ecp.fr)
- - Get method works with views if key specified
-
-Version 2.3
- - connect.host returns "localhost" when connected to Unix socket
- (torppa@tuhnu.cutery.fi)
- - Use PyArg_ParseTupleAndKeywords in connect() (torppa@tuhnu.cutery.fi)
- - fixes and cleanups (torppa@tuhnu.cutery.fi)
- - Fixed memory leak in dictresult() (terekhov@emc.com)
- - Deprecated pgext.py - functionality now in pg.py
- - More cleanups to the tutorial
- - Added fileno() method - terekhov@emc.com (Mikhail Terekhov)
- - added money type to quoting function
- - Compiles cleanly with more warnings turned on
- - Returns PostgreSQL error message on error
- - Init accepts keywords (Jarkko Torppa)
- - Convenience functions can be overridden (Jarkko Torppa)
- - added close() method
-
-Version 2.2
- - Added user and password support thanks to Ng Pheng Siong <ngps@post1.com>
- - Insert queries return the inserted oid
- - Add new pg wrapper (C modile renamed to _pg)
- - Wrapped database connection in a class.
- - Cleaned up some of the tutorial. (More work needed.)
- - Added version and __version__. Thanks to thilo@eevolute.com for
- the suggestion.
-
-Version 2.1
- - return fields as proper Python objects for field type
- - Cleaned up pgext.py
- - Added dictresult method
-
-Version 2.0 (23/12/1997):
- - updated code for PostgreSQL 6.2.1 and Python 1.5
- - reformatted code and converted to ANSI
- - Changed name to PyGreSQL (from PyGres95)
- - changed order of arguments to connect function
- - Created new type pgqueryobject and moved certain methods to it.
- - Added a print function for pgqueryobject
-
-Version 1.0b (4/11/1995):
- - keyword support for connect function moved from library file to C code
- and taken away from library.
- - rewrote documentation
- - bug fix in connect function
- - enhancements in large objects interface methods
-
-Version 1.0a (30/10/1995) (limited release):
- - module adapted to standard Python syntax
- - keyword support for connect function in library file
- - rewrote default parameters interface (internal use of strings)
- - fixed minor bugs in module interface
- - redefinition of error messages
-
-Version 0.9b (10/10/1995) (first public release):
- - large objects implementation
- - many bug fixes, enhancements, ...
-
-Version 0.1a (7/10/1995):
- - basic libpq functions (SQL access)
+++ /dev/null
-# $Header: /cvsroot/pgsql/src/interfaces/python/Attic/GNUmakefile,v 1.16 2003/03/21 17:18:34 petere Exp $
-
-subdir = src/interfaces/python
-top_builddir = ../../..
-include $(top_builddir)/src/Makefile.global
-
-NAME = _pgmodule
-SO_MAJOR_VERSION = 2
-SO_MINOR_VERSION = 4
-OBJS = pgmodule.o
-SHLIB_LINK = $(libpq)
-ifeq ($(PORTNAME), cygwin)
-override CPPFLAGS += -DUSE_DL_IMPORT
-SHLIB_LINK += $(python_libspec)
-endif
-
-
-include $(top_srcdir)/src/Makefile.shlib
-
-override CPPFLAGS := -I$(libpq_srcdir) $(CPPFLAGS) $(python_includespec)
-
-all: all-lib
-
-all-lib: libpq-all
-
-.PHONY: libpq-all
-libpq-all:
- $(MAKE) -C $(libpq_builddir) all
-
-install-warning-msg := { \
-echo "*** Skipping the installation of the Python interface module for lack"; \
-echo "*** of permissions. To install it, change to the directory"; \
-echo "*** `pwd`,"; \
-echo "*** become the appropriate user, and do '$(MAKE) install'."; }
-
-install: all installdirs
- @if test -w $(DESTDIR)$(python_moduleexecdir) && test -w $(DESTDIR)$(python_moduledir); then \
- echo "$(INSTALL_SHLIB) $(shlib) $(DESTDIR)$(python_moduleexecdir)/_pgmodule$(DLSUFFIX)"; \
- $(INSTALL_SHLIB) $(shlib) $(DESTDIR)$(python_moduleexecdir)/_pgmodule$(DLSUFFIX); \
- \
- echo "$(INSTALL_DATA) $(srcdir)/pg.py $(DESTDIR)$(python_moduledir)/pg.py"; \
- $(INSTALL_DATA) $(srcdir)/pg.py $(DESTDIR)$(python_moduledir)/pg.py; \
- \
- echo "$(INSTALL_DATA) $(srcdir)/pgdb.py $(DESTDIR)$(python_moduledir)/pgdb.py"; \
- $(INSTALL_DATA) $(srcdir)/pgdb.py $(DESTDIR)$(python_moduledir)/pgdb.py; \
- else \
- $(install-warning-msg); \
- fi
-
-installdirs:
- $(mkinstalldirs) $(DESTDIR)$(python_moduleexecdir) $(DESTDIR)$(python_moduledir)
-
-uninstall:
- rm -f $(DESTDIR)$(python_moduleexecdir)/_pgmodule$(DLSUFFIX) \
- $(DESTDIR)$(python_moduledir)/pg.py \
- $(DESTDIR)$(python_moduledir)/pgdb.py
-
-clean distclean maintainer-clean: clean-lib
- rm -f $(OBJS)
+++ /dev/null
-%define version 3.0
-%define release pre20000310
-%define name PyGreSQL
-%define pythonversion 1.5
-Source: %{name}-%{version}-%{release}.tgz
-Summary: A Python interface for PostgreSQL database.
-Name: %{name}
-Version: %{version}
-Release: %{release}
-#Patch:
-Group: Applications/Databases
-BuildRoot: /tmp/rpmbuild_%{name}
-Copyright: GPL-like
-Requires: python >= %{pythonversion}, postgresql
-Packager: Hartmut Goebel <hartmut@goebel.noris.de>
-Vendor: D'Arcy J.M. Cain <darcy@druid.net>
-URL: http://www.druid.net/pygresql/
-
-%changelog
-#* Tue Oct 06 1998 Fabio Coatti <cova@felix.unife.it>
-#- fixed installation directory files list
-
-%description
-PyGreSQL is a python module that interfaces to a PostgreSQL database. It
-embeds the PostgreSQL query library to allow easy use of the powerful
-PostgreSQL features from a Python script.
-
-Version 3.0 includes DB-API 2.0 support.
-
-%prep
-rm -rf $RPM_BUILD_ROOT
-
-%setup -n %{name}-%{version}-%{release}
-#%patch
-
-%build
-mkdir -p $RPM_BUILD_ROOT/usr/lib/python%{pythonversion}/lib-dynload
-cc -fpic -shared -o $RPM_BUILD_ROOT/usr/lib/python%{pythonversion}/lib-dynload/_pg.so -I/usr/include/pgsql/ -I/usr/include/python1.5 pgmodule.c -lpq
-## import fails, since _pg is not yet installed
-python -c 'import pg' || true
-python -c 'import pgdb' || true
-
-%install
-cp *.py *.pyc $RPM_BUILD_ROOT/usr/lib/python%{pythonversion}/
-
-cd $RPM_BUILD_ROOT
-find . -type f | sed 's,^\.,\%attr(-\,root\,root) ,' > $RPM_BUILD_DIR/file.list.%{name}
-find . -type l | sed 's,^\.,\%attr(-\,root\,root) ,' >> $RPM_BUILD_DIR/file.list.%{name}
-
-%files -f ../file.list.%{name}
-%doc %attr(-,root,root) Announce ChangeLog README tutorial
-
-
-%clean
-rm -rf $RPM_BUILD_ROOT
-cd $RPM_BUILD_DIR
-rm -rf %{name}-%{version}-%{release} file.list.%{name}
+++ /dev/null
-
-PyGreSQL - v3.3: PostgreSQL module for Python
-==============================================
-
-0. Copyright notice
-===================
-
- PyGreSQL, version 3.3
- A Python interface for PostgreSQL database.
- Written by D'Arcy J.M. Cain, darcy@druid.net<BR>
- Based heavily on code written by Pascal Andre, andre@chimay.via.ecp.fr.
- Copyright (c) 1995, Pascal ANDRE (andre@via.ecp.fr)
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose, without fee, and without a written agreement
- is hereby granted, provided that the above copyright notice and this
- paragraph and the following two paragraphs appear in all copies or in any
- new file that contains a substantial portion of this file.
-
- IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
- SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
- ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE
- AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE
- AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
- ENHANCEMENTS, OR MODIFICATIONS.
-
- Further modifications copyright 1997 - 2000 by D'Arcy J.M. Cain
- (darcy@druid.net) subject to the same terms and conditions as above.
-
- Note that as of March 1 2001 the development of PyGreSQL has been moved
- directly into the PostgreSQL development tree and is subject to the
- PostgreSQL copyright except where contradicted by the above copyrights
- in which case the above copyrights apply.
-
-
-1. Presentation
-===============
-
-1.1. Introduction
------------------
-
-PostgreSQL is a database system derived from Postgres4.2. It conforms to
-(most of) ANSI SQL and offers many interesting capabilities (C dynamic linking
-for functions or type definition, etc.). This package is copyright by the
-Regents of the University of California, and is freely distributable.
-
-Python is an interpreted programming language. It is object oriented, simple
-to use (light syntax, simple and straightforward statements), and has many
-extensions for building GUIs, interfacing with WWW, etc. An intelligent web
-browser (HotJava like) is currently under development (November 1995), and
-this should open programmers many doors. Python is copyrighted by Stichting S
-Mathematisch Centrum, Amsterdam, The Netherlands, and is freely distributable.
-
-PyGreSQL is a python module that interfaces to a PostgreSQL database. It
-embeds the PostgreSQL query library to allow easy use of the powerful
-PostgreSQL features from a Python script.
-
-PyGreSQL 2.0 was developed and tested on a NetBSD 1.3_BETA system. It is
-based on the PyGres95 code written by Pascal Andre, andre@chimay.via.ecp.fr.
-I changed the version to 2.0 and updated the code for Python 1.5 and
-PostgreSQL 6.2.1. While I was at it I upgraded the code to use full ANSI
-style prototypes and changed the order of arguments to connect.
-
-
-1.2. Distribution files
------------------------
-
- README - this file
- Announce - announcement of this release
- ChangeLog - changes that affected this package during its history
- pgmodule.c - the C python module
- pg.py - PyGreSQL DB class.
- pgdb.py - DB-SIG DB-API 2.0 compliant API wrapper for PygreSQL
- tutorial/ - demos directory
- Content: basics.py, syscat.py, advanced.py, func.py and
- pgtools.py. The samples here have been taken from the
- PostgreSQL manual and were used for module testing. They
- demonstrate some PostgreSQL features. Pgtools.py is an
- add-in used for demonstration.
-
-1.3. Installation
------------------
-
-* If you are building this from source on most systems you can simply add
- the flag "--with-python" to the Configure command when building PostgreSQL.
- This will cause PyGreSQL to be built at the same time. For this to work
- you must already have built Python as well as the mxDateTime package
- from http://starship.python.net/~lemburg/mxDateTime.html.
-
-* For a Linux x86 system that uses RPMs, you can pick up an RPM at
- ftp://ftp.druid.net/pub/distrib/pygresql.i386.rpm
-
-* Note that if you are using the DB-API module you must also install
- mxDateTime from http://starship.python.net/~lemburg/mxDateTime.html.
-
-* Also, check out setup.py for an alternate method of installing the package.
-
-You have two options. You can compile PyGreSQL as a stand-alone module
-or you can build it into the Python interpreter.
-
-GENERAL
-
-* You must first have installed Python and PostgreSQL on your system.
- The header files and developer's libraries for both Python and PostgreSQL
- must be installed on your system before you can build PyGreSQL. If you
- built both Python and PostgreSQL from source, you should be fine. If your
- system uses some package mechanism (such as RPMs or NetBSD packages), then
- you probably need to install packages such as Python-devel in addition to
- the Python package.
-
-* PyGreSQL is implemented as three parts, a C module labeled _pg and two
- Python wrappers called pg.py and pgdb.py. This changed between 2.1 and
- 2.2 and again in 3.0. These changes should not affect any existing
- programs but the installation is slightly different.
-
-* Download and unpack the PyGreSQL tarball if you haven't already done so.
-
-STAND-ALONE
-
-* In the directory containing pgmodule.c, run the following command
- cc -fpic -shared -o _pg.so -I[pyInc] -I[pgInc] -L[pgLib] -lpq pgmodule.c
- where:
- [pyInc] = path of the Python include (usually Python.h)
- [pgInc] = path of the PostgreSQL include (usually postgres.h)
- [pgLib] = path of the PostgreSQL libraries (usually libpq.so or libpq.a)
- Some options may be added to this line:
- -DNO_DEF_VAR - no default variables support
- -DNO_DIRECT - no direct access methods
- -DNO_LARGE - no large object support
- -DNO_SNPRINTF - if running a system with no snprintf call
- -DNO_PQSOCKET - if running an older PostgreSQL
-
- On some systems you may need to include -lcrypt in the list of libraries
- to make it compile.
-
- Define NO_PQSOCKET if you are using a version of PostgreSQL before 6.4
- that does not have the PQsocket function. The other options will be
- described in the next sections.
-
-* Test the new module. Something like the following should work.
-
- $ python
-
- >>> import _pg
- >>> db = _pg.connect('thilo','localhost')
- >>> db.query("INSERT INTO test VALUES ('ping','pong')")
- 18304
- >>> db.query("SELECT * FROM test")
- eins|zwei
- ----+----
- ping|pong
- (1 row)
-
-* Finally, move the _pg.so, pg.py, and pgdb.py to a directory in your
- PYTHONPATH. A good place would be /usr/lib/python1.5/site-python if
- your Python modules are in /usr/lib/python1.5.
-
-BUILT-IN TO PYTHON INTERPRETER
-
-* Find the directory where your 'Setup' file lives (usually ??/Modules) in
- the Python source hierarchy and copy or symlink the 'pgmodule.c' file there.
-
-* Add the following line to your Setup file
- _pg pgmodule.c -I[pgInc] -L[pgLib] -lpq # -lcrypt # needed on some systems
- where:
- [pgInc] = path of PostgreSQL include (often /usr/local/include/python1.5)
- [pgLib] = path of the PostgreSQL libraries (often /usr/local/lib/python1.5)
- Some options may be added to this line:
- -DNO_DEF_VAR - no default variables support
- -DNO_DIRECT - no direct access methods
- -DNO_LARGE - no large object support
- -DNO_SNPRINTF - if running a system with no snprintf call
- -DNO_PQSOCKET - if running an older PostgreSQL
-
- Define NO_PQSOCKET if you are using a version of PostgreSQL before 6.4
- that does not have the PQsocket function. The other options will be
- described in the next sections.
-
-* If you want a shared module, make sure that the "*shared*" keyword is
- uncommented and add the above line below it. You used to need to install
- your shared modules with "make sharedinstall but this no longer seems
- to be true."
-
-* Copy pg.py to the lib directory where the rest of your modules are. For
- example, that's /usr/local/lib/Python on my system.
-
-* Rebuild Python from the root directory of the Python source hierarchy by
- running 'make -f Makefile.pre.in boot' and 'make && make install'
-
-* For more details read the documentation at the top of Makefile.pre.in
-
-
-1.4. Where to get ... ?
------------------------
-
-The home sites of the different packages are:
-
- - Python: http://www.python.org/
- - PosgreSQL: http://www.PostgreSQL.org/
- - PyGreSQL: http://www.druid.net/pygresql/
-
-A Linux RPM can be picked up from
-ftp://ftp.druid.net/pub/distrib/pygresql.i386.rpm. A NetBSD package thould
-be in the distribution soon and is available at
-ftp://ftp.druid.net/pub/distrib/pygresql.pkg.tgz. A WIN32 package is
-available at http://highqualdev.com/.
-
-1.5. Information and support
-----------------------------
-
-If you need information about these packages please check their web sites:
-
- - Python: http://www.python.org/
- - PostgreSQL: http://www.postgresql.org/
- - PyGres95: http://www.via.ecp.fr/via/products/pygres.html
- - PyGreSQL: http://www.druid.net/pygresql/
-
-For support:
-
- - Python: newgroup comp.lang.python
- - PostgreSQL: mailing list (see package documentation for information)
- - PyGres95: contact me (andre@via.ecp.fr) for bug reports, ideas,
- remarks I will try to answer as long as my free time allow
- me to do that.
- - PyGreSQL: contact me (darcy@druid.net) concerning the changes to 2.x
- and up. If you would like to proposes changes please
- join the PyGreSQL mailing list and send context diffs
- there. See http://www.vex.net/mailman/listinfo/pygresql
- to join the mailing list.
-
-
-2. Programming information
-==========================
-
-See main PostgreSQL documentation.
-
-
-3. Todo
-=======
-
-The large object and direct access functions need much more attention.
-
-An update query should return the number of rows affected.
-
-The C module needs to be cleaned up and redundant code merged.
-
-The DB-API module needs to be documented.
-
-The fetch method should use real cursors.
-
-
-4. Future directions
-====================
-
-Users should be able to register their own types with _pg.
-
-I would like a new method that returns a dictionary of dictionaries from
-a SELECT.
-
-
+++ /dev/null
-*shared*
-
-_pg pgmodule.c -I@libpq_srcdir@ @INCLUDES@ -L@libpq_builddir@ -lpq @EXTRA_LIBS@
+++ /dev/null
-# pg.py
-# Written by D'Arcy J.M. Cain
-
-# This library implements some basic database management stuff. It
-# includes the pg module and builds on it. This is known as the
-# "Classic" interface. For DB-API compliance use the pgdb module.
-
-from _pg import *
-from types import *
-import string, re, sys
-
-# utility function
-# We expect int, seq, decimal, text or date (more later)
-def _quote(d, t):
- if d == None:
- return "NULL"
-
- if t in ['int', 'seq']:
- if d == "": return "NULL"
- return "%d" % long(d)
-
- if t == 'decimal':
- if d == "": return "NULL"
- return "%f" % float(d)
-
- if t == 'money':
- if d == "": return "NULL"
- return "'%.2f'" % float(d)
-
- if t == 'bool':
- # Can't run upper() on these
- if d in (0, 1): return ("'f'", "'t'")[d]
-
- if string.upper(d) in ['T', 'TRUE', 'Y', 'YES', '1', 'ON']:
- return "'t'"
- else:
- return "'f'"
-
- if t == 'date' and d == '': return "NULL"
- if t in ('inet', 'cidr') and d == '': return "NULL"
-
- return "'%s'" % string.strip(re.sub("'", "''", \
- re.sub("\\\\", "\\\\\\\\", "%s" % d)))
-
-class DB:
- """This class wraps the pg connection type"""
-
- def __init__(self, *args, **kw):
- self.db = apply(connect, args, kw)
-
- # Create convience methods, in a way that is still overridable
- # (members are not copied because they are actually functions)
- for e in self.db.__methods__:
- setattr(self, e, getattr(self.db, e))
-
- self.__attnames__ = {}
- self.__pkeys__ = {}
- self.debug = None # For debugging scripts, set to output format
- # that takes a single string arg. For example
- # in a CGI set to "%s<BR>"
-
- def _do_debug(self, s):
- if not self.debug: return
- if type(self.debug) == StringType: print self.debug % s
- if type(self.debug) == FunctionType: self.debug(s)
- if type(self.debug) == FileType: print >> self.debug, s
-
- # wrap query for debugging
- def query(self, qstr):
- self._do_debug(qstr)
- return self.db.query(qstr)
-
- def pkey(self, cl, newpkey = None):
- """This method returns the primary key of a class. If newpkey
- is set and is set and is not a dictionary then set that
- value as the primary key of the class. If it is a dictionary
- then replace the __pkeys__ dictionary with it."""
- # Get all the primary keys at once
- if type(newpkey) == DictType:
- self.__pkeys__ = newpkey
- return
-
- if newpkey:
- self.__pkeys__[cl] = newpkey
- return newpkey
-
- if self.__pkeys__ == {}:
- for rel, att in self.db.query("""SELECT
- pg_class.relname, pg_attribute.attname
- FROM pg_class, pg_attribute, pg_index
- WHERE pg_class.oid = pg_attribute.attrelid AND
- pg_class.oid = pg_index.indrelid AND
- pg_index.indkey[0] = pg_attribute.attnum AND
- pg_index.indisprimary = 't' AND
- pg_attribute.attisdropped = 'f'""").getresult():
- self.__pkeys__[rel] = att
-
- # will raise an exception if primary key doesn't exist
- return self.__pkeys__[cl]
-
- def get_databases(self):
- l = []
- for n in self.db.query("SELECT datname FROM pg_database").getresult():
- l.append(n[0])
- return l
-
- def get_tables(self):
- l = []
- for n in self.db.query("""SELECT relname FROM pg_class
- WHERE relkind = 'r' AND
- relname !~ '^Inv' AND
- relname !~ '^pg_'""").getresult():
- l.append(n[0])
- return l
-
- def get_attnames(self, cl, newattnames = None):
- """This method gets a list of attribute names for a class. If
- the optional newattnames exists it must be a dictionary and
- will become the new attribute names dictionary."""
-
- if type(newattnames) == DictType:
- self.__attnames__ = newattnames
- return
- elif newattnames:
- raise error, "If supplied, newattnames must be a dictionary"
-
- # May as well cache them
- if self.__attnames__.has_key(cl):
- return self.__attnames__[cl]
-
- query = """SELECT pg_attribute.attname, pg_type.typname
- FROM pg_class, pg_attribute, pg_type
- WHERE pg_class.relname = '%s' AND
- pg_attribute.attnum > 0 AND
- pg_attribute.attrelid = pg_class.oid AND
- pg_attribute.atttypid = pg_type.oid AND
- pg_attribute.attisdropped = 'f'"""
-
- l = {}
- for attname, typname in self.db.query(query % cl).getresult():
- if re.match("^int", typname):
- l[attname] = 'int'
- elif re.match("^oid", typname):
- l[attname] = 'int'
- elif re.match("^text", typname):
- l[attname] = 'text'
- elif re.match("^char", typname):
- l[attname] = 'text'
- elif re.match("^name", typname):
- l[attname] = 'text'
- elif re.match("^abstime", typname):
- l[attname] = 'date'
- elif re.match("^date", typname):
- l[attname] = 'date'
- elif re.match("^timestamp", typname):
- l[attname] = 'date'
- elif re.match("^bool", typname):
- l[attname] = 'bool'
- elif re.match("^float", typname):
- l[attname] = 'decimal'
- elif re.match("^money", typname):
- l[attname] = 'money'
- else:
- l[attname] = 'text'
-
- l['oid'] = 'int' # every table has this
- self.__attnames__[cl] = l # cache it
- return self.__attnames__[cl]
-
- # return a tuple from a database
- def get(self, cl, arg, keyname = None, view = 0):
- if cl[-1] == '*': # need parent table name
- xcl = cl[:-1]
- else:
- xcl = cl
-
- if keyname == None: # use the primary key by default
- keyname = self.pkey(xcl)
-
- fnames = self.get_attnames(xcl)
-
- if type(arg) == DictType:
- # To allow users to work with multiple tables we munge the
- # name when the key is "oid"
- if keyname == 'oid': k = arg['oid_%s' % xcl]
- else: k = arg[keyname]
- else:
- k = arg
- arg = {}
-
- # We want the oid for later updates if that isn't the key
- if keyname == 'oid':
- q = "SELECT * FROM %s WHERE oid = %s" % (cl, k)
- elif view:
- q = "SELECT * FROM %s WHERE %s = %s" % \
- (cl, keyname, _quote(k, fnames[keyname]))
- else:
- q = "SELECT oid AS oid_%s, %s FROM %s WHERE %s = %s" % \
- (xcl, string.join(fnames.keys(), ','),\
- cl, keyname, _quote(k, fnames[keyname]))
-
- self._do_debug(q)
- res = self.db.query(q).dictresult()
- if res == []:
- raise error, \
- "No such record in %s where %s is %s" % \
- (cl, keyname, _quote(k, fnames[keyname]))
- return None
-
- for k in res[0].keys():
- arg[k] = res[0][k]
-
- return arg
-
- # Inserts a new tuple into a table
- # We currently don't support insert into views although PostgreSQL does
- def insert(self, cl, a):
- fnames = self.get_attnames(cl)
- l = []
- n = []
- for f in fnames.keys():
- if f != 'oid' and a.has_key(f):
- l.append(_quote(a[f], fnames[f]))
- n.append(f)
-
- try:
- q = "INSERT INTO %s (%s) VALUES (%s)" % \
- (cl, string.join(n, ','), string.join(l, ','))
- self._do_debug(q)
- a['oid_%s' % cl] = self.db.query(q)
- except:
- raise error, "Error inserting into %s: %s" % (cl, sys.exc_value)
-
- # reload the dictionary to catch things modified by engine
- # note that get() changes 'oid' below to oid_table
- # if no read perms (it can and does happen) return None
- try: return self.get(cl, a, 'oid')
- except: return None
-
- # Update always works on the oid which get returns if available
- # otherwise use the primary key. Fail if neither.
- def update(self, cl, a):
- self.pkey(cl) # make sure we have a self.__pkeys__ dictionary
-
- foid = 'oid_%s' % cl
- if a.has_key(foid):
- where = "oid = %s" % a[foid]
- elif self.__pkeys__.has_key(cl) and a.has_key(self.__pkeys__[cl]):
- where = "%s = '%s'" % (self.__pkeys__[cl], a[self.__pkeys__[cl]])
- else:
- raise error, "Update needs primary key or oid as %s" % foid
-
- v = []
- k = 0
- fnames = self.get_attnames(cl)
-
- for ff in fnames.keys():
- if ff != 'oid' and a.has_key(ff):
- v.append("%s = %s" % (ff, _quote(a[ff], fnames[ff])))
-
- if v == []:
- return None
-
- try:
- q = "UPDATE %s SET %s WHERE %s" % \
- (cl, string.join(v, ','), where)
- self._do_debug(q)
- self.db.query(q)
- except:
- raise error, "Can't update %s: %s" % (cl, sys.exc_value)
-
- # reload the dictionary to catch things modified by engine
- if a.has_key(foid):
- return self.get(cl, a, 'oid')
- else:
- return self.get(cl, a)
-
- # At some point we will need a way to get defaults from a table
- def clear(self, cl, a = {}):
- fnames = self.get_attnames(cl)
- for ff in fnames.keys():
- if fnames[ff] in ['int', 'decimal', 'seq', 'money']:
- a[ff] = 0
- else:
- a[ff] = ""
-
- a['oid'] = 0
- return a
-
- # Like update, delete works on the oid
- # one day we will be testing that the record to be deleted
- # isn't referenced somewhere (or else PostgreSQL will)
- def delete(self, cl, a):
- try:
- q = "DELETE FROM %s WHERE oid = %s" % (cl, a['oid_%s' % cl])
- self._do_debug(q)
- self.db.query(q)
- except:
- raise error, "Can't delete %s: %s" % (cl, sys.exc_value)
-
- return None
-
+++ /dev/null
-""" pgdb - DB-SIG compliant module for PygreSQL.
-
- (c) 1999, Pascal Andre <andre@via.ecp.fr>.
- See package documentation for further information on copyright.
-
- Inline documentation is sparse. See DB-SIG 2.0 specification for
- usage information.
-
- basic usage:
-
- pgdb.connect(connect_string) -> connection
- connect_string = 'host:database:user:password:opt:tty'
- All parts are optional. You may also pass host through
- password as keyword arguments. To pass a port, pass it in
- the host keyword parameter:
- pgdb.connect(host='localhost:5432')
-
- connection.cursor() -> cursor
-
- connection.commit()
-
- connection.close()
-
- connection.rollback()
-
- cursor.execute(query[, params])
- execute a query, binding params (a dictionary) if it is
- passed. The binding syntax is the same as the % operator
- for dictionaries, and no quoting is done.
-
- cursor.executemany(query, list of params)
- execute a query many times, binding each param dictionary
- from the list.
-
- cursor.fetchone() -> [value, value, ...]
-
- cursor.fetchall() -> [[value, value, ...], ...]
-
- cursor.fetchmany([size]) -> [[value, value, ...], ...]
- returns size or cursor.arraysize number of rows from result
- set. Default cursor.arraysize is 1.
-
- cursor.description -> [(column_name, type_name, display_size,
- internal_size, precision, scale, null_ok), ...]
-
- Note that precision, scale and null_ok are not implemented.
-
- cursor.rowcount
- number of rows available in the result set. Available after
- a call to execute.
-
- cursor.close()
-
-"""
-
-import _pg
-import string
-import exceptions
-import types
-import time
-import types
-
-# Marc-Andre is changing where DateTime goes. This handles it either way.
-try: from mx import DateTime
-except ImportError: import DateTime
-
-### module constants
-
-# compliant with DB SIG 2.0
-apilevel = '2.0'
-
-# module may be shared, but not connections
-threadsafety = 1
-
-# this module use extended python format codes
-paramstyle = 'pyformat'
-
-### exception hierarchy
-
-class Warning(StandardError):
- pass
-
-class Error(StandardError):
- pass
-
-class InterfaceError(Error):
- pass
-
-class DatabaseError(Error):
- pass
-
-class DataError(DatabaseError):
- pass
-
-class OperationalError(DatabaseError):
- pass
-
-class IntegrityError(DatabaseError):
- pass
-
-class InternalError(DatabaseError):
- pass
-
-class ProgrammingError(DatabaseError):
- pass
-
-class NotSupportedError(DatabaseError):
- pass
-
-### internal type handling class
-class pgdbTypeCache:
-
- def __init__(self, cnx):
- self.__source = cnx.source()
- self.__type_cache = {}
-
- def typecast(self, typ, value):
- # for NULL values, no typecast is necessary
- if value == None:
- return value
-
- if typ == STRING:
- pass
- elif typ == BINARY:
- pass
- elif typ == BOOL:
- value = (value[:1] in ['t','T'])
- elif typ == INTEGER:
- value = int(value)
- elif typ == LONG:
- value = long(value)
- elif typ == FLOAT:
- value = float(value)
- elif typ == MONEY:
- value = string.replace(value, "$", "")
- value = string.replace(value, ",", "")
- value = float(value)
- elif typ == DATETIME:
- # format may differ ... we'll give string
- pass
- elif typ == ROWID:
- value = long(value)
- return value
-
- def getdescr(self, oid):
- try:
- return self.__type_cache[oid]
- except:
- self.__source.execute(
- "SELECT typname, typlen "
- "FROM pg_type WHERE oid = %s" % oid
- )
- res = self.__source.fetch(1)[0]
- # column name is omitted from the return value. It will
- # have to be prepended by the caller.
- res = (
- res[0],
- None, string.atoi(res[1]),
- None, None, None
- )
- self.__type_cache[oid] = res
- return res
-
-### cursor object
-
-class pgdbCursor:
-
- def __init__(self, src, cache):
- self.__cache = cache
- self.__source = src
- self.description = None
- self.rowcount = -1
- self.arraysize = 1
-
- def close(self):
- self.__source.close()
- self.description = None
- self.rowcount = -1
-
- def execute(self, operation, params = None):
- # "The parameters may also be specified as list of
- # tuples to e.g. insert multiple rows in a single
- # operation, but this kind of usage is deprecated:
- if params and type(params) == types.ListType and \
- type(params[0]) == types.TupleType:
- self.executemany(operation, params)
- else:
- # not a list of tuples
- self.executemany(operation, (params,))
-
- def executemany(self, operation, param_seq):
- self.description = None
- self.rowcount = -1
-
- # first try to execute all queries
- totrows = 0
- sql = "INIT"
- try:
- for params in param_seq:
- if params != None:
- sql = _quoteparams(operation, params)
- else:
- sql = operation
- rows = self.__source.execute(sql)
- if rows != None: # true is __source is NOT a DQL
- totrows = totrows + rows
- except _pg.error, msg:
- raise DatabaseError, "error '%s' in '%s'" % ( msg, sql )
- except:
- raise OperationalError, "internal error in '%s'" % sql
-
- # then initialize result raw count and description
- if self.__source.resulttype == _pg.RESULT_DQL:
- self.rowcount = self.__source.ntuples
- d = []
- for typ in self.__source.listinfo():
- # listinfo is a sequence of
- # (index, column_name, type_oid)
- # getdescr returns all items needed for a
- # description tuple except the column_name.
- desc = typ[1:2]+self.__cache.getdescr(typ[2])
- d.append(desc)
- self.description = d
- else:
- self.rowcount = totrows
- self.description = None
-
- def fetchone(self):
- res = self.fetchmany(1, 0)
- try:
- return res[0]
- except:
- return None
-
- def fetchall(self):
- return self.fetchmany(-1, 0)
-
- def fetchmany(self, size = None, keep = 1):
- if size == None:
- size = self.arraysize
- if keep == 1:
- self.arraysize = size
-
- try: res = self.__source.fetch(size)
- except _pg.error, e: raise DatabaseError, str(e)
-
- result = []
- for r in res:
- row = []
- for i in range(len(r)):
- row.append(self.__cache.typecast(
- self.description[i][1],
- r[i]
- )
- )
- result.append(row)
- return result
-
- def nextset(self):
- raise NotSupportedError, "nextset() is not supported"
-
- def setinputsizes(self, sizes):
- pass
-
- def setoutputsize(self, size, col = 0):
- pass
-
-
-try:
- _quote = _pg.quote_fast
- _quoteparams = _pg.quoteparams_fast
-except (NameError, AttributeError):
- def _quote(x):
- if type(x) == DateTime.DateTimeType:
- x = str(x)
- if type(x) == types.StringType:
- x = "'" + string.replace(
- string.replace(str(x), '\\', '\\\\'), "'", "''") + "'"
-
- elif type(x) in (types.IntType, types.LongType, types.FloatType):
- pass
- elif x is None:
- x = 'NULL'
- elif type(x) in (types.ListType, types.TupleType):
- x = '(%s)' % string.join(map(lambda x: str(_quote(x)), x), ',')
- elif hasattr(x, '__pg_repr__'):
- x = x.__pg_repr__()
- else:
- raise InterfaceError, 'do not know how to handle type %s' % type(x)
-
- return x
-
- def _quoteparams(s, params):
- if hasattr(params, 'has_key'):
- x = {}
- for k, v in params.items():
- x[k] = _quote(v)
- params = x
- else:
- params = tuple(map(_quote, params))
-
- return s % params
-
-### connection object
-
-class pgdbCnx:
-
- def __init__(self, cnx):
- self.__cnx = cnx
- self.__cache = pgdbTypeCache(cnx)
- try:
- src = self.__cnx.source()
- src.execute("BEGIN")
- except:
- raise OperationalError, "invalid connection."
-
- def close(self):
- self.__cnx.close()
-
- def commit(self):
- try:
- src = self.__cnx.source()
- src.execute("COMMIT")
- src.execute("BEGIN")
- except:
- raise OperationalError, "can't commit."
-
- def rollback(self):
- try:
- src = self.__cnx.source()
- src.execute("ROLLBACK")
- src.execute("BEGIN")
- except:
- raise OperationalError, "can't rollback."
-
- def cursor(self):
- try:
- src = self.__cnx.source()
- return pgdbCursor(src, self.__cache)
- except:
- raise pgOperationalError, "invalid connection."
-
-### module interface
-
-# connects to a database
-def connect(dsn = None, user = None, password = None, host = None, database = None):
- # first get params from DSN
- dbport = -1
- dbhost = ""
- dbbase = ""
- dbuser = ""
- dbpasswd = ""
- dbopt = ""
- dbtty = ""
- try:
- params = string.split(dsn, ":")
- dbhost = params[0]
- dbbase = params[1]
- dbuser = params[2]
- dbpasswd = params[3]
- dbopt = params[4]
- dbtty = params[5]
- except:
- pass
-
- # override if necessary
- if user != None:
- dbuser = user
- if password != None:
- dbpasswd = password
- if database != None:
- dbbase = database
- if host != None:
- try:
- params = string.split(host, ":")
- dbhost = params[0]
- dbport = int(params[1])
- except:
- pass
-
- # empty host is localhost
- if dbhost == "":
- dbhost = None
- if dbuser == "":
- dbuser = None
-
- # open the connection
- cnx = _pg.connect(dbbase, dbhost, dbport, dbopt,
- dbtty, dbuser, dbpasswd)
- return pgdbCnx(cnx)
-
-### types handling
-
-# PostgreSQL is object-oriented: types are dynamic. We must thus use type names
-# as internal type codes.
-
-class pgdbType:
-
- def __init__(self, *values):
- self.values= values
-
- def __cmp__(self, other):
- if other in self.values:
- return 0
- if other < self.values:
- return 1
- else:
- return -1
-
-STRING = pgdbType(
- 'char', 'bpchar', 'name', 'text', 'varchar'
-)
-
-# BLOB support is pg specific
-BINARY = pgdbType()
-INTEGER = pgdbType('int2', 'int4', 'serial')
-LONG = pgdbType('int8')
-FLOAT = pgdbType('float4', 'float8', 'numeric')
-BOOL = pgdbType('bool')
-MONEY = pgdbType('money')
-
-# this may be problematic as type are quite different ... I hope it won't hurt
-DATETIME = pgdbType(
- 'abstime', 'reltime', 'tinterval', 'date', 'time', 'timespan', 'timestamp', 'timestamptz', 'interval'
-)
-
-# OIDs are used for everything (types, tables, BLOBs, rows, ...). This may cause
-# confusion, but we are unable to find out what exactly is behind the OID (at
-# least not easily enough). Should this be undefined as BLOBs ?
-ROWID = pgdbType(
- 'oid', 'oid8'
-)
-
-# mandatory type helpers
-def Date(year, month, day):
- return DateTime.DateTime(year, month, day)
-
-def Time(hour, minute, second):
- return DateTime.TimeDelta(hour, minute, second)
-
-def Timestamp(year, month, day, hour, minute, second):
- return DateTime.DateTime(year, month, day, hour, minute, second)
-
-def DateFromTicks(ticks):
- return apply(Date, time.localtime(ticks)[:3])
-
-def TimeFromTicks(ticks):
- return apply(Time, time.localtime(ticks)[3:6])
-
-def TimestampFromTicks(ticks):
- return apply(Timestamp, time.localtime(ticks)[:6])
-
+++ /dev/null
-/*
- * PyGres, version 2.2 A Python interface for PostgreSQL database. Written by
- * D'Arcy J.M. Cain, (darcy@druid.net). Based heavily on code written by
- * Pascal Andre, andre@chimay.via.ecp.fr. Copyright (c) 1995, Pascal Andre
- * (andre@via.ecp.fr).
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose, without fee, and without a written
- * agreement is hereby granted, provided that the above copyright notice and
- * this paragraph and the following two paragraphs appear in all copies or in
- * any new file that contains a substantial portion of this file.
- *
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
- * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE
- * AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE
- * AUTHOR HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
- * ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Further modifications copyright 1997, 1998, 1999 by D'Arcy J.M. Cain
- * (darcy@druid.net) subject to the same terms and conditions as above.
- *
- */
-
-#include <Python.h>
-#include "postgres.h"
-#include "libpq-fe.h"
-#include "libpq/libpq-fs.h"
-#include "catalog/pg_type.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-/* PyObject_Del does not exist in older versions of Python. */
-#if PY_VERSION_HEX < 0x01060000
-#define PyObject_Del(op) PyMem_DEL((op))
-#endif
-
-static PyObject *PGError;
-static const char *PyPgVersion = "3.4 (beta)";
-
-/* taken from fileobject.c */
-#define BUF(v) PyString_AS_STRING((PyStringObject *)(v))
-
-/* default values */
-#define MODULE_NAME "pgsql"
-#define ARRAYSIZE 1
-
-/* flags for object validity checks */
-#define CHECK_OPEN 1
-#define CHECK_CLOSE 2
-#define CHECK_CNX 4
-#define CHECK_RESULT 8
-#define CHECK_DQL 16
-
-/* query result types */
-#define RESULT_EMPTY 1
-#define RESULT_DML 2
-#define RESULT_DDL 3
-#define RESULT_DQL 4
-
-/* flags for move methods */
-#define QUERY_MOVEFIRST 1
-#define QUERY_MOVELAST 2
-#define QUERY_MOVENEXT 3
-#define QUERY_MOVEPREV 4
-
-/* moves names for errors */
-const char *__movename[5] =
-{"", "movefirst", "movelast", "movenext", "moveprev"};
-
-#define MAX_BUFFER_SIZE 8192 /* maximum transaction size */
-
-#ifndef NO_DIRECT
-#define DIRECT_ACCESS 1 /* enables direct access functions */
-#endif /* NO_DIRECT */
-
-#ifndef NO_LARGE
-#define LARGE_OBJECTS 1 /* enables large objects support */
-#endif /* NO_LARGE */
-
-#ifndef NO_DEF_VAR
-#define DEFAULT_VARS 1 /* enables default variables use */
-#endif /* NO_DEF_VAR */
-
-#ifdef MS_WIN32
-#define NO_SNPRINTF 1
-#endif
-
-/* --------------------------------------------------------------------- */
-
-/* MODULE GLOBAL VARIABLES */
-
-#ifdef DEFAULT_VARS
-
-static PyObject *pg_default_host; /* default database host */
-static PyObject *pg_default_base; /* default database name */
-static PyObject *pg_default_opt; /* default connection options */
-static PyObject *pg_default_tty; /* default debug tty */
-static PyObject *pg_default_port; /* default connection port */
-static PyObject *pg_default_user; /* default username */
-static PyObject *pg_default_passwd; /* default password */
-#endif /* DEFAULT_VARS */
-
-DL_EXPORT(void) init_pg(void);
-int *get_type_array(PGresult *result, int nfields);
-
-/* --------------------------------------------------------------------- */
-/* OBJECTS DECLARATION */
-
-/* pg connection object */
-
-typedef struct
-{
- PyObject_HEAD
- int valid; /* validity flag */
- PGconn *cnx; /* PostGres connection handle */
- PGresult *last_result; /* last result content */
-} pgobject;
-
-staticforward PyTypeObject PgType;
-
-#define is_pgobject(v) ((v)->ob_type == &PgType)
-
-static PyObject *
-pgobject_New(void)
-{
- pgobject *pgobj;
-
- if ((pgobj = PyObject_NEW(pgobject, &PgType)) == NULL)
- return NULL;
-
- pgobj->valid = 1;
- pgobj->last_result = NULL;
- pgobj->cnx = NULL;
- return (PyObject *) pgobj;
-}
-
-/* pg query object */
-
-typedef struct
-{
- PyObject_HEAD
- PGresult *last_result; /* last result content */
- int result_type; /* type of previous result */
- long current_pos; /* current position in last result */
- long num_rows; /* number of (affected) rows */
-} pgqueryobject;
-
-staticforward PyTypeObject PgQueryType;
-
-#define is_pgqueryobject(v) ((v)->ob_type == &PgQueryType)
-
-/* pg source object */
-
-typedef struct
-{
- PyObject_HEAD
- int valid; /* validity flag */
- pgobject *pgcnx; /* parent connection object */
- PGresult *last_result; /* last result content */
- int result_type; /* result type (DDL/DML/DQL) */
- long arraysize; /* array size for fetch method */
- int current_row; /* current selected row */
- int max_row; /* number of rows in the result */
- int num_fields; /* number of fields in each row */
-} pgsourceobject;
-
-staticforward PyTypeObject PgSourceType;
-
-#define is_pgsourceobject(v) ((v)->ob_type == &PgSourceType)
-
-
-#ifdef LARGE_OBJECTS
-/* pg large object */
-
-typedef struct
-{
- PyObject_HEAD
- pgobject * pgcnx; /* parent connection object */
- Oid lo_oid; /* large object oid */
- int lo_fd; /* large object fd */
-} pglargeobject;
-
-staticforward PyTypeObject PglargeType;
-
-#define is_pglargeobject(v) ((v)->ob_type == &PglargeType)
-#endif /* LARGE_OBJECTS */
-
-/* --------------------------------------------------------------------- */
-/* INTERNAL FUNCTIONS */
-
-/* checks connection validity */
-static int
-check_cnx_obj(pgobject * self)
-{
- if (!self->valid)
- {
- PyErr_SetString(PGError, "connection has been closed");
- return 0;
- }
- return 1;
-}
-
-#ifdef LARGE_OBJECTS
-/* checks large object validity */
-static int
-check_lo_obj(pglargeobject * self, int level)
-{
- if (!check_cnx_obj(self->pgcnx))
- return 0;
-
- if (!self->lo_oid)
- {
- PyErr_SetString(PGError, "object is not valid (null oid).");
- return 0;
- }
-
- if (level & CHECK_OPEN)
- {
- if (self->lo_fd < 0)
- {
- PyErr_SetString(PyExc_IOError, "object is not opened.");
- return 0;
- }
- }
-
- if (level & CHECK_CLOSE)
- {
- if (self->lo_fd >= 0)
- {
- PyErr_SetString(PyExc_IOError, "object is already opened.");
- return 0;
- }
- }
-
- return 1;
-}
-#endif /* LARGE_OBJECTS */
-
-/* checks source object validity */
-static int
-check_source_obj(pgsourceobject * self, int level)
-{
- if (!self->valid)
- {
- PyErr_SetString(PGError, "object has been closed");
- return 0;
- }
-
- if ((level & CHECK_RESULT) && self->last_result == NULL)
- {
- PyErr_SetString(PGError, "no result.");
- return 0;
- }
-
- if ((level & CHECK_DQL) && self->result_type != RESULT_DQL)
- {
- PyErr_SetString(PGError, "last query did not return tuples.");
- return 0;
- }
-
- if ((level & CHECK_CNX) && !check_cnx_obj(self->pgcnx))
- return 0;
-
- return 1;
-}
-
-/* shared functions for converting PG types to Python types */
-int *
-get_type_array(PGresult *result, int nfields)
-{
- int *typ;
- int j;
-
- if ((typ = malloc(sizeof(int) * nfields)) == NULL)
- {
- PyErr_SetString(PyExc_SyntaxError, "memory error in getresult().");
- return NULL;
- }
-
- for (j = 0; j < nfields; j++)
- {
- switch (PQftype(result, j))
- {
- case INT2OID:
- case INT4OID:
- case OIDOID:
- typ[j] = 1;
- break;
-
- case INT8OID:
- typ[j] = 2;
- break;
-
- case FLOAT4OID:
- case FLOAT8OID:
- case NUMERICOID:
- typ[j] = 3;
- break;
-
- case CASHOID:
- typ[j] = 4;
- break;
-
- default:
- typ[j] = 5;
- break;
- }
- }
-
- return typ;
-}
-
-
-/* prototypes for constructors */
-static pgsourceobject *pgsource_new(pgobject * pgcnx);
-
-/* --------------------------------------------------------------------- */
-/* PG SOURCE OBJECT IMPLEMENTATION */
-
-/* constructor (internal use only) */
-static pgsourceobject *
-pgsource_new(pgobject * pgcnx)
-{
- pgsourceobject *npgobj;
-
- /* allocates new query object */
- if ((npgobj = PyObject_NEW(pgsourceobject, &PgSourceType)) == NULL)
- return NULL;
-
- /* initializes internal parameters */
- Py_XINCREF(pgcnx);
- npgobj->pgcnx = pgcnx;
- npgobj->last_result = NULL;
- npgobj->valid = 1;
- npgobj->arraysize = ARRAYSIZE;
-
- return npgobj;
-}
-
-/* destructor */
-static void
-pgsource_dealloc(pgsourceobject * self)
-{
- if (self->last_result)
- PQclear(self->last_result);
-
- Py_XDECREF(self->pgcnx);
- PyObject_Del(self);
-}
-
-/* closes object */
-static char pgsource_close__doc__[] =
-"close() -- close query object without deleting it. "
-"All instances of the query object can no longer be used after this call.";
-
-static PyObject *
-pgsource_close(pgsourceobject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_TypeError, "method close() takes no parameter.");
- return NULL;
- }
-
- /* frees result if necessary and invalidates object */
- if (self->last_result)
- {
- PQclear(self->last_result);
- self->result_type = RESULT_EMPTY;
- self->last_result = NULL;
- }
-
- self->valid = 0;
-
- /* return None */
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* database query */
-static char pgsource_execute__doc__[] =
-"execute(sql) -- execute a SQL statement (string).\n "
-"On success, this call returns the number of affected rows, "
-"or None for DQL (SELECT, ...) statements.\n"
-"The fetch (fetch(), fetchone() and fetchall()) methods can be used "
-"to get result rows.";
-
-static PyObject *
-pgsource_execute(pgsourceobject * self, PyObject * args)
-{
- char *query;
- const char *temp;
- long num_rows;
-
- /* checks validity */
- if (!check_source_obj(self, CHECK_CNX))
- return NULL;
-
- /* get query args */
- if (!PyArg_ParseTuple(args, "s", &query))
- {
- PyErr_SetString(PyExc_TypeError, "execute(sql), with sql (string).");
- return NULL;
- }
-
- /* frees previous result */
- if (self->last_result)
- {
- PQclear(self->last_result);
- self->last_result = NULL;
- }
- self->max_row = 0;
- self->current_row = 0;
- self->num_fields = 0;
-
- /* gets result */
- Py_BEGIN_ALLOW_THREADS
- self->last_result = PQexec(self->pgcnx->cnx, query);
- Py_END_ALLOW_THREADS
-
- /* checks result validity */
- if (!self->last_result)
- {
- PyErr_SetString(PyExc_ValueError, PQerrorMessage(self->pgcnx->cnx));
- return NULL;
- }
-
- /* checks result status */
- switch (PQresultStatus(self->last_result))
- {
-
- /* query succeeded */
- case PGRES_TUPLES_OK: /* DQL: returns None (DB-SIG compliant) */
- self->result_type = RESULT_DQL;
- self->max_row = PQntuples(self->last_result);
- self->num_fields = PQnfields(self->last_result);
- Py_INCREF(Py_None);
- return Py_None;
- case PGRES_COMMAND_OK: /* other requests */
- case PGRES_COPY_OUT:
- case PGRES_COPY_IN:
- self->result_type = RESULT_DDL;
- temp = PQcmdTuples(self->last_result);
- num_rows = 1;
- if (temp[0] != 0)
- {
- self->result_type = RESULT_DML;
- num_rows = atol(temp);
- }
- return PyInt_FromLong(num_rows);
-
- /* query failed */
- case PGRES_EMPTY_QUERY:
- PyErr_SetString(PyExc_ValueError, "empty query.");
- break;
- case PGRES_BAD_RESPONSE:
- case PGRES_FATAL_ERROR:
- case PGRES_NONFATAL_ERROR:
- PyErr_SetString(PGError, PQerrorMessage(self->pgcnx->cnx));
- break;
- default:
- PyErr_SetString(PGError, "internal error: "
- "unknown result status.");
- break;
- }
-
- /* frees result and returns error */
- PQclear(self->last_result);
- self->last_result = NULL;
- self->result_type = RESULT_EMPTY;
- return NULL;
-}
-
-/* gets oid status for last query (valid for INSERTs, 0 for other) */
-static char pgsource_oidstatus__doc__[] =
-"oidstatus() -- return oid of last inserted row (if available).";
-
-static PyObject *
-pgsource_oidstatus(pgsourceobject * self, PyObject * args)
-{
- long oid;
-
- /* checks validity */
- if (!check_source_obj(self, CHECK_RESULT))
- return NULL;
-
- /* checks args */
- if ((args != NULL) && (!PyArg_ParseTuple(args, "")))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method oidstatus() takes no parameters.");
- return NULL;
- }
-
- /* retrieves oid status */
- if ((oid = PQoidValue(self->last_result)) == InvalidOid)
- oid = 0;
-
- return PyInt_FromLong(oid);
-}
-
-/* fetches rows from last result */
-static char pgsource_fetch__doc__[] =
-"fetch(num) -- return the next num rows from the last result in a list. "
-"If num parameter is omitted arraysize attribute value is used. "
-"If size equals -1, all rows are fetched.";
-
-static PyObject *
-pgsource_fetch(pgsourceobject * self, PyObject * args)
-{
- PyObject *rowtuple,
- *reslist,
- *str;
- int i,
- j;
- long size;
-
- /* checks validity */
- if (!check_source_obj(self, CHECK_RESULT | CHECK_DQL))
- return NULL;
-
- /* checks args */
- size = self->arraysize;
- if (!PyArg_ParseTuple(args, "|l", &size))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "fetch(num), with num (integer, optional).");
- return NULL;
- }
-
- /* seeks last line */
- /* limit size to be within the amount of data we actually have */
- if (size == -1 || (self->max_row - self->current_row) < size)
- size = self->max_row - self->current_row;
-
- /* allocate list for result */
- if ((reslist = PyList_New(0)) == NULL)
- return NULL;
-
- /* builds result */
- for (i = 0; i < size; ++i)
- {
- if ((rowtuple = PyTuple_New(self->num_fields)) == NULL)
- {
- Py_DECREF(reslist);
- return NULL;
- }
-
- for (j = 0; j < self->num_fields; j++)
- {
- if (PQgetisnull(self->last_result, self->current_row, j))
- {
- Py_INCREF(Py_None);
- str = Py_None;
- }
- else
- str = PyString_FromString(PQgetvalue(self->last_result, self->current_row, j));
-
- PyTuple_SET_ITEM(rowtuple, j, str);
- }
-
- PyList_Append(reslist, rowtuple);
- Py_DECREF(rowtuple);
- self->current_row++;
- }
-
- return reslist;
-}
-
-/* changes current row (internal wrapper for all "move" methods) */
-static PyObject *
-pgsource_move(pgsourceobject * self, PyObject * args, int move)
-{
- /* checks validity */
- if (!check_source_obj(self, CHECK_RESULT | CHECK_DQL))
- return NULL;
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- char errbuf[256];
-
-#ifdef NO_SNPRINTF
- sprintf(errbuf, "method %s() takes no parameter.", __movename[move]);
-#else
- snprintf(errbuf, sizeof(errbuf),
- "method %s() takes no parameter.", __movename[move]);
-#endif
-
- PyErr_SetString(PyExc_SyntaxError, errbuf);
- return NULL;
- }
-
- /* changes the current row */
- switch (move)
- {
- case QUERY_MOVEFIRST:
- self->current_row = 0;
- break;
- case QUERY_MOVELAST:
- self->current_row = self->max_row - 1;
- break;
- case QUERY_MOVENEXT:
- if (self->current_row != self->max_row)
- self->current_row++;
- break;
- case QUERY_MOVEPREV:
- if (self->current_row > 0)
- self->current_row--;
- break;
- }
-
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* move to first result row */
-static char pgsource_movefirst__doc__[] =
-"movefirst() -- move to first result row.";
-
-static PyObject *
-pgsource_movefirst(pgsourceobject * self, PyObject * args)
-{
- return pgsource_move(self, args, QUERY_MOVEFIRST);
-}
-
-/* move to last result row */
-static char pgsource_movelast__doc__[] =
-"movelast() -- move to last valid result row.";
-
-static PyObject *
-pgsource_movelast(pgsourceobject * self, PyObject * args)
-{
- return pgsource_move(self, args, QUERY_MOVELAST);
-}
-
-/* move to next result row */
-static char pgsource_movenext__doc__[] =
-"movenext() -- move to next result row.";
-
-static PyObject *
-pgsource_movenext(pgsourceobject * self, PyObject * args)
-{
- return pgsource_move(self, args, QUERY_MOVENEXT);
-}
-
-/* move to previous result row */
-static char pgsource_moveprev__doc__[] =
-"moveprev() -- move to previous result row.";
-
-static PyObject *
-pgsource_moveprev(pgsourceobject * self, PyObject * args)
-{
- return pgsource_move(self, args, QUERY_MOVEPREV);
-}
-
-/* finds field number from string/integer (internal use only) */
-static int
-pgsource_fieldindex(pgsourceobject * self, PyObject * param, const char *usage)
-{
- int num;
-
- /* checks validity */
- if (!check_source_obj(self, CHECK_RESULT | CHECK_DQL))
- return -1;
-
- /* gets field number */
- if (PyString_Check(param))
- num = PQfnumber(self->last_result, PyString_AsString(param));
- else if (PyInt_Check(param))
- num = PyInt_AsLong(param);
- else
- {
- PyErr_SetString(PyExc_TypeError, usage);
- return -1;
- }
-
- /* checks field validity */
- if (num < 0 || num >= self->num_fields)
- {
- PyErr_SetString(PyExc_ValueError, "Unknown field.");
- return -1;
- }
-
- return num;
-}
-
-/* builds field information from position (internal use only) */
-static PyObject *
-pgsource_buildinfo(pgsourceobject * self, int num)
-{
- PyObject *result;
-
- /* allocates tuple */
- result = PyTuple_New(3);
- if (!result)
- return NULL;
-
- /* affects field information */
- PyTuple_SET_ITEM(result, 0, PyInt_FromLong(num));
- PyTuple_SET_ITEM(result, 1,
- PyString_FromString(PQfname(self->last_result, num)));
- PyTuple_SET_ITEM(result, 2,
- PyInt_FromLong(PQftype(self->last_result, num)));
-
- return result;
-}
-
-/* lists fields info */
-static char pgsource_listinfo__doc__[] =
-"listinfo() -- return information for all fields "
-"(position, name, type oid).";
-
-static PyObject *
-pgsource_listinfo(pgsourceobject * self, PyObject * args)
-{
- int i;
- PyObject *result,
- *info;
-
- /* checks validity */
- if (!check_source_obj(self, CHECK_RESULT | CHECK_DQL))
- return NULL;
-
- /* gets args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_TypeError,
- "method listinfo() takes no parameter.");
- return NULL;
- }
-
- /* builds result */
- if ((result = PyTuple_New(self->num_fields)) == NULL)
- return NULL;
-
- for (i = 0; i < self->num_fields; i++)
- {
- info = pgsource_buildinfo(self, i);
- if (!info)
- {
- Py_DECREF(result);
- return NULL;
- }
- PyTuple_SET_ITEM(result, i, info);
- }
-
- /* returns result */
- return result;
-};
-
-/* list fields information for last result */
-static char pgsource_fieldinfo__doc__[] =
-"fieldinfo(string|integer) -- return specified field information "
-"(position, name, type oid).";
-
-static PyObject *
-pgsource_fieldinfo(pgsourceobject * self, PyObject * args)
-{
- static const char short_usage[] =
- "fieldinfo(desc), with desc (string|integer).";
- int num;
- PyObject *param;
-
- /* gets args */
- if (!PyArg_ParseTuple(args, "O", ¶m))
- {
- PyErr_SetString(PyExc_TypeError, short_usage);
- return NULL;
- }
-
- /* checks args and validity */
- if ((num = pgsource_fieldindex(self, param, short_usage)) == -1)
- return NULL;
-
- /* returns result */
- return pgsource_buildinfo(self, num);
-};
-
-/* retrieve field value */
-static char pgsource_field__doc__[] =
-"field(string|integer) -- return specified field value.";
-
-static PyObject *
-pgsource_field(pgsourceobject * self, PyObject * args)
-{
- static const char short_usage[] =
- "field(desc), with desc (string|integer).";
- int num;
- PyObject *param;
-
- /* gets args */
- if (!PyArg_ParseTuple(args, "O", ¶m))
- {
- PyErr_SetString(PyExc_TypeError, short_usage);
- return NULL;
- }
-
- /* checks args and validity */
- if ((num = pgsource_fieldindex(self, param, short_usage)) == -1)
- return NULL;
-
- return PyString_FromString(PQgetvalue(self->last_result,
- self->current_row, num));
-}
-
-/* query object methods */
-static PyMethodDef pgsource_methods[] = {
- {"close", (PyCFunction) pgsource_close, 1,
- pgsource_close__doc__},
- {"execute", (PyCFunction) pgsource_execute, 1,
- pgsource_execute__doc__},
- {"oidstatus", (PyCFunction) pgsource_oidstatus, 1,
- pgsource_oidstatus__doc__},
- {"fetch", (PyCFunction) pgsource_fetch, 1,
- pgsource_fetch__doc__},
- {"movefirst", (PyCFunction) pgsource_movefirst, 1,
- pgsource_movefirst__doc__},
- {"movelast", (PyCFunction) pgsource_movelast, 1,
- pgsource_movelast__doc__},
- {"movenext", (PyCFunction) pgsource_movenext, 1,
- pgsource_movenext__doc__},
- {"moveprev", (PyCFunction) pgsource_moveprev, 1,
- pgsource_moveprev__doc__},
- {"field", (PyCFunction) pgsource_field, 1,
- pgsource_field__doc__},
- {"fieldinfo", (PyCFunction) pgsource_fieldinfo, 1,
- pgsource_fieldinfo__doc__},
- {"listinfo", (PyCFunction) pgsource_listinfo, 1,
- pgsource_listinfo__doc__},
- {NULL, NULL}
-};
-
-/* gets query object attributes */
-static PyObject *
-pgsource_getattr(pgsourceobject * self, char *name)
-{
- /* pg connection object */
- if (!strcmp(name, "pgcnx"))
- {
- if (check_source_obj(self, 0))
- {
- Py_INCREF(self->pgcnx);
- return (PyObject *) (self->pgcnx);
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- /* arraysize */
- if (!strcmp(name, "arraysize"))
- return PyInt_FromLong(self->arraysize);
-
- /* resulttype */
- if (!strcmp(name, "resulttype"))
- return PyInt_FromLong(self->result_type);
-
- /* ntuples */
- if (!strcmp(name, "ntuples"))
- return PyInt_FromLong(self->max_row);
-
- /* nfields */
- if (!strcmp(name, "nfields"))
- return PyInt_FromLong(self->num_fields);
-
- /* attributes list */
- if (!strcmp(name, "__members__"))
- {
- PyObject *list = PyList_New(5);
-
- PyList_SET_ITEM(list, 0, PyString_FromString("pgcnx"));
- PyList_SET_ITEM(list, 1, PyString_FromString("arraysize"));
- PyList_SET_ITEM(list, 2, PyString_FromString("resulttype"));
- PyList_SET_ITEM(list, 3, PyString_FromString("ntuples"));
- PyList_SET_ITEM(list, 4, PyString_FromString("nfields"));
-
- return list;
- }
-
- /* module name */
- if (!strcmp(name, "__module__"))
- return PyString_FromString(MODULE_NAME);
-
- /* class name */
- if (!strcmp(name, "__class__"))
- return PyString_FromString("pgsource");
-
- /* seeks name in methods (fallback) */
- return Py_FindMethod(pgsource_methods, (PyObject *) self, name);
-}
-
-/* sets query object attributes */
-static int
-pgsource_setattr(pgsourceobject * self, char *name, PyObject * v)
-{
- /* arraysize */
- if (!strcmp(name, "arraysize"))
- {
- if (!PyInt_Check(v))
- {
- PyErr_SetString(PyExc_TypeError, "arraysize must be integer.");
- return -1;
- }
-
- self->arraysize = PyInt_AsLong(v);
- return 0;
- }
-
- /* unknown attribute */
- PyErr_SetString(PyExc_TypeError, "not a writable attribute.");
- return -1;
-}
-
-/* prints query object in human readable format */
-static int
-pgsource_print(pgsourceobject * self, FILE *fp, int flags)
-{
- PQprintOpt op;
-
- switch (self->result_type)
- {
- case RESULT_DQL:
- memset(&op, 0, sizeof(op));
- op.align = 1;
- op.header = 1;
- op.fieldSep = "|";
- op.pager = 1;
- PQprint(fp, self->last_result, &op);
- break;
- case RESULT_DDL:
- case RESULT_DML:
- fputs(PQcmdStatus(self->last_result), fp);
- break;
- case RESULT_EMPTY:
- default:
- fputs("Empty PostgreSQL source object.", fp);
- break;
- }
-
- return 0;
-}
-
-/* query type definition */
-staticforward PyTypeObject PgSourceType = {
- PyObject_HEAD_INIT(NULL)
-
- 0, /* ob_size */
- "pgsourceobject", /* tp_name */
- sizeof(pgsourceobject), /* tp_basicsize */
- 0, /* tp_itemsize */
- /* methods */
- (destructor) pgsource_dealloc, /* tp_dealloc */
- (printfunc) pgsource_print, /* tp_print */
- (getattrfunc) pgsource_getattr, /* tp_getattr */
- (setattrfunc) pgsource_setattr, /* tp_setattr */
- 0, /* tp_compare */
- 0, /* tp_repr */
- 0, /* tp_as_number */
- 0, /* tp_as_sequence */
- 0, /* tp_as_mapping */
- 0, /* tp_hash */
-};
-
-/* --------------------------------------------------------------------- */
-/* PG "LARGE" OBJECT IMPLEMENTATION */
-
-#ifdef LARGE_OBJECTS
-
-/* constructor (internal use only) */
-static pglargeobject *
-pglarge_new(pgobject * pgcnx, Oid oid)
-{
- pglargeobject *npglo;
-
- if ((npglo = PyObject_NEW(pglargeobject, &PglargeType)) == NULL)
- return NULL;
-
- Py_XINCREF(pgcnx);
- npglo->pgcnx = pgcnx;
- npglo->lo_fd = -1;
- npglo->lo_oid = oid;
-
- return npglo;
-}
-
-/* destructor */
-static void
-pglarge_dealloc(pglargeobject * self)
-{
- if (self->lo_fd >= 0 && check_cnx_obj(self->pgcnx))
- lo_close(self->pgcnx->cnx, self->lo_fd);
-
- Py_XDECREF(self->pgcnx);
- PyObject_Del(self);
-}
-
-/* opens large object */
-static char pglarge_open__doc__[] =
-"open(mode) -- open access to large object with specified mode "
-"(INV_READ, INV_WRITE constants defined by module).";
-
-static PyObject *
-pglarge_open(pglargeobject * self, PyObject * args)
-{
- int mode,
- fd;
-
- /* check validity */
- if (!check_lo_obj(self, CHECK_CLOSE))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "i", &mode))
- {
- PyErr_SetString(PyExc_TypeError, "open(mode), with mode(integer).");
- return NULL;
- }
-
- /* opens large object */
- if ((fd = lo_open(self->pgcnx->cnx, self->lo_oid, mode)) < 0)
- {
- PyErr_SetString(PyExc_IOError, "can't open large object.");
- return NULL;
- }
- self->lo_fd = fd;
-
- /* no error : returns Py_None */
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* close large object */
-static char pglarge_close__doc__[] =
-"close() -- close access to large object data.";
-
-static PyObject *
-pglarge_close(pglargeobject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method close() takes no parameters.");
- return NULL;
- }
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* closes large object */
- if (lo_close(self->pgcnx->cnx, self->lo_fd))
- {
- PyErr_SetString(PyExc_IOError, "error while closing large object fd.");
- return NULL;
- }
- self->lo_fd = -1;
-
- /* no error : returns Py_None */
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* reads from large object */
-static char pglarge_read__doc__[] =
-"read(integer) -- read from large object to sized string. "
-"Object must be opened in read mode before calling this method.";
-
-static PyObject *
-pglarge_read(pglargeobject * self, PyObject * args)
-{
- int size;
- PyObject *buffer;
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "i", &size))
- {
- PyErr_SetString(PyExc_TypeError, "read(size), wih size (integer).");
- return NULL;
- }
-
- if (size <= 0)
- {
- PyErr_SetString(PyExc_ValueError, "size must be positive.");
- return NULL;
- }
-
- /* allocate buffer and runs read */
- buffer = PyString_FromStringAndSize((char *) NULL, size);
-
- if ((size = lo_read(self->pgcnx->cnx, self->lo_fd, BUF(buffer), size)) < 0)
- {
- PyErr_SetString(PyExc_IOError, "error while reading.");
- Py_XDECREF(buffer);
- return NULL;
- }
-
- /* resize buffer and returns it */
- _PyString_Resize(&buffer, size);
- return buffer;
-}
-
-/* write to large object */
-static char pglarge_write__doc__[] =
-"write(string) -- write sized string to large object. "
-"Object must be opened in read mode before calling this method.";
-
-static PyObject *
-pglarge_write(pglargeobject * self, PyObject * args)
-{
- char *buffer;
- int size,
- bufsize;
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "s#", &buffer, &bufsize))
- {
- PyErr_SetString(PyExc_TypeError,
- "write(buffer), with buffer (sized string).");
- return NULL;
- }
-
- /* sends query */
- if ((size = lo_write(self->pgcnx->cnx, self->lo_fd, buffer,
- bufsize)) < bufsize)
- {
- PyErr_SetString(PyExc_IOError, "buffer truncated during write.");
- return NULL;
- }
-
- /* no error : returns Py_None */
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* go to position in large object */
-static char pglarge_seek__doc__[] =
-"seek(off, whence) -- move to specified position. Object must be opened "
-"before calling this method. whence can be SEEK_SET, SEEK_CUR or SEEK_END, "
-"constants defined by module.";
-
-static PyObject *
-pglarge_lseek(pglargeobject * self, PyObject * args)
-{
- /* offset and whence are initialized to keep compiler happy */
- int ret,
- offset = 0,
- whence = 0;
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "ii", &offset, &whence))
- {
- PyErr_SetString(PyExc_TypeError,
- "lseek(offset, whence), with offset and whence (integers).");
- return NULL;
- }
-
- /* sends query */
- if ((ret = lo_lseek(self->pgcnx->cnx, self->lo_fd, offset, whence)) == -1)
- {
- PyErr_SetString(PyExc_IOError, "error while moving cursor.");
- return NULL;
- }
-
- /* returns position */
- return PyInt_FromLong(ret);
-}
-
-/* gets large object size */
-static char pglarge_size__doc__[] =
-"size() -- return large object size. "
-"Object must be opened before calling this method.";
-
-static PyObject *
-pglarge_size(pglargeobject * self, PyObject * args)
-{
- int start,
- end;
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method size() takes no parameters.");
- return NULL;
- }
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* gets current position */
- if ((start = lo_tell(self->pgcnx->cnx, self->lo_fd)) == -1)
- {
- PyErr_SetString(PyExc_IOError, "error while getting current position.");
- return NULL;
- }
-
- /* gets end position */
- if ((end = lo_lseek(self->pgcnx->cnx, self->lo_fd, 0, SEEK_END)) == -1)
- {
- PyErr_SetString(PyExc_IOError, "error while getting end position.");
- return NULL;
- }
-
- /* move back to start position */
- if ((start = lo_lseek(self->pgcnx->cnx, self->lo_fd, start, SEEK_SET)) == -1)
- {
- PyErr_SetString(PyExc_IOError,
- "error while moving back to first position.");
- return NULL;
- }
-
- /* returns size */
- return PyInt_FromLong(end);
-}
-
-/* gets large object cursor position */
-static char pglarge_tell__doc__[] =
-"tell() -- give current position in large object. "
-"Object must be opened before calling this method.";
-
-static PyObject *
-pglarge_tell(pglargeobject * self, PyObject * args)
-{
- int start;
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method tell() takes no parameters.");
- return NULL;
- }
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_OPEN))
- return NULL;
-
- /* gets current position */
- if ((start = lo_tell(self->pgcnx->cnx, self->lo_fd)) == -1)
- {
- PyErr_SetString(PyExc_IOError, "error while getting position.");
- return NULL;
- }
-
- /* returns size */
- return PyInt_FromLong(start);
-}
-
-/* exports large object as unix file */
-static char pglarge_export__doc__[] =
-"export(string) -- export large object data to specified file. "
-"Object must be closed when calling this method.";
-
-static PyObject *
-pglarge_export(pglargeobject * self, PyObject * args)
-{
- char *name;
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_CLOSE))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "s", &name))
- {
- PyErr_SetString(PyExc_TypeError,
- "export(filename), with filename (string).");
- return NULL;
- }
-
- /* runs command */
- if (!lo_export(self->pgcnx->cnx, self->lo_oid, name))
- {
- PyErr_SetString(PyExc_IOError, "error while exporting large object.");
- return NULL;
- }
-
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* deletes a large object */
-static char pglarge_unlink__doc__[] =
-"unlink() -- destroy large object. "
-"Object must be closed when calling this method.";
-
-static PyObject *
-pglarge_unlink(pglargeobject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method unlink() takes no parameters.");
- return NULL;
- }
-
- /* checks validity */
- if (!check_lo_obj(self, CHECK_CLOSE))
- return NULL;
-
- /* deletes the object, invalidate it on success */
- if (!lo_unlink(self->pgcnx->cnx, self->lo_oid))
- {
- PyErr_SetString(PyExc_IOError, "error while unlinking large object");
- return NULL;
- }
- self->lo_oid = 0;
-
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* large object methods */
-static struct PyMethodDef pglarge_methods[] = {
- {"open", (PyCFunction) pglarge_open, 1, pglarge_open__doc__},
- {"close", (PyCFunction) pglarge_close, 1, pglarge_close__doc__},
- {"read", (PyCFunction) pglarge_read, 1, pglarge_read__doc__},
- {"write", (PyCFunction) pglarge_write, 1, pglarge_write__doc__},
- {"seek", (PyCFunction) pglarge_lseek, 1, pglarge_seek__doc__},
- {"size", (PyCFunction) pglarge_size, 1, pglarge_size__doc__},
- {"tell", (PyCFunction) pglarge_tell, 1, pglarge_tell__doc__},
- {"export", (PyCFunction) pglarge_export, 1, pglarge_export__doc__},
- {"unlink", (PyCFunction) pglarge_unlink, 1, pglarge_unlink__doc__},
- {NULL, NULL}
-};
-
-/* get attribute */
-static PyObject *
-pglarge_getattr(pglargeobject * self, char *name)
-{
- /* list postgreSQL large object fields */
-
- /* associated pg connection object */
- if (!strcmp(name, "pgcnx"))
- {
- if (check_lo_obj(self, 0))
- {
- Py_INCREF(self->pgcnx);
- return (PyObject *) (self->pgcnx);
- }
-
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- /* large object oid */
- if (!strcmp(name, "oid"))
- {
- if (check_lo_obj(self, 0))
- return PyInt_FromLong(self->lo_oid);
-
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- /* error (status) message */
- if (!strcmp(name, "error"))
- return PyString_FromString(PQerrorMessage(self->pgcnx->cnx));
-
- /* attributes list */
- if (!strcmp(name, "__members__"))
- {
- PyObject *list = PyList_New(3);
-
- if (list)
- {
- PyList_SET_ITEM(list, 0, PyString_FromString("oid"));
- PyList_SET_ITEM(list, 1, PyString_FromString("pgcnx"));
- PyList_SET_ITEM(list, 2, PyString_FromString("error"));
- }
-
- return list;
- }
-
- /* module name */
- if (!strcmp(name, "__module__"))
- return PyString_FromString(MODULE_NAME);
-
- /* class name */
- if (!strcmp(name, "__class__"))
- return PyString_FromString("pglarge");
-
- /* seeks name in methods (fallback) */
- return Py_FindMethod(pglarge_methods, (PyObject *) self, name);
-}
-
-/* prints query object in human readable format */
-static int
-pglarge_print(pglargeobject * self, FILE *fp, int flags)
-{
- char print_buffer[128];
-
- if (self->lo_fd >= 0)
- {
-#ifdef NO_SNPRINTF
- sprintf(print_buffer,
- "Opened large object, oid %ld", (long) self->lo_oid);
-#else
- snprintf(print_buffer, sizeof(print_buffer),
- "Opened large object, oid %ld", (long) self->lo_oid);
-#endif
- fputs(print_buffer, fp);
- }
- else
- {
-#ifdef NO_SNPRINTF
- sprintf(print_buffer,
- "Closed large object, oid %ld", (long) self->lo_oid);
-#else
- snprintf(print_buffer, sizeof(print_buffer),
- "Closed large object, oid %ld", (long) self->lo_oid);
-#endif
- fputs(print_buffer, fp);
- }
-
- return 0;
-}
-
-/* object type definition */
-staticforward PyTypeObject PglargeType = {
- PyObject_HEAD_INIT(NULL)
- 0, /* ob_size */
- "pglarge", /* tp_name */
- sizeof(pglargeobject), /* tp_basicsize */
- 0, /* tp_itemsize */
-
- /* methods */
- (destructor) pglarge_dealloc, /* tp_dealloc */
- (printfunc) pglarge_print, /* tp_print */
- (getattrfunc) pglarge_getattr, /* tp_getattr */
- 0, /* tp_setattr */
- 0, /* tp_compare */
- 0, /* tp_repr */
- 0, /* tp_as_number */
- 0, /* tp_as_sequence */
- 0, /* tp_as_mapping */
- 0, /* tp_hash */
-};
-#endif /* LARGE_OBJECTS */
-
-
-/* --------------------------------------------------------------------- */
-/* PG QUERY OBJECT IMPLEMENTATION */
-
-/* connects to a database */
-static char connect__doc__[] =
-"connect(dbname, host, port, opt, tty) -- connect to a PostgreSQL database "
-"using specified parameters (optionals, keywords aware).";
-
-static PyObject *
-pgconnect(pgobject * self, PyObject * args, PyObject * dict)
-{
- static const char *kwlist[] = {"dbname", "host", "port", "opt",
- "tty", "user", "passwd", NULL};
- char *pghost,
- *pgopt,
- *pgtty,
- *pgdbname,
- *pguser,
- *pgpasswd;
- int pgport;
- char port_buffer[20];
- pgobject *npgobj;
-
- pghost = pgopt = pgtty = pgdbname = pguser = pgpasswd = NULL;
- pgport = -1;
-
- /*
- * parses standard arguments With the right compiler warnings, this
- * will issue a diagnostic. There is really no way around it. If I
- * don't declare kwlist as const char *kwlist[] then it complains when
- * I try to assign all those constant strings to it.
- */
- if (!PyArg_ParseTupleAndKeywords(args, dict, "|zzizzzz", (char **) kwlist,
- &pgdbname, &pghost, &pgport, &pgopt, &pgtty, &pguser, &pgpasswd))
- return NULL;
-
-#ifdef DEFAULT_VARS
- /* handles defaults variables (for uninitialised vars) */
- if ((!pghost) && (pg_default_host != Py_None))
- pghost = PyString_AsString(pg_default_host);
-
- if ((pgport == -1) && (pg_default_port != Py_None))
- pgport = PyInt_AsLong(pg_default_port);
-
- if ((!pgopt) && (pg_default_opt != Py_None))
- pgopt = PyString_AsString(pg_default_opt);
-
- if ((!pgtty) && (pg_default_tty != Py_None))
- pgtty = PyString_AsString(pg_default_tty);
-
- if ((!pgdbname) && (pg_default_base != Py_None))
- pgdbname = PyString_AsString(pg_default_base);
-
- if ((!pguser) && (pg_default_user != Py_None))
- pguser = PyString_AsString(pg_default_user);
-
- if ((!pgpasswd) && (pg_default_passwd != Py_None))
- pgpasswd = PyString_AsString(pg_default_passwd);
-#endif /* DEFAULT_VARS */
-
- if ((npgobj = (pgobject *) pgobject_New()) == NULL)
- return NULL;
-
- if (pgport != -1)
- {
- memset(port_buffer, 0, sizeof(port_buffer));
- sprintf(port_buffer, "%d", pgport);
- npgobj->cnx = PQsetdbLogin(pghost, port_buffer, pgopt, pgtty, pgdbname,
- pguser, pgpasswd);
- }
- else
- npgobj->cnx = PQsetdbLogin(pghost, NULL, pgopt, pgtty, pgdbname,
- pguser, pgpasswd);
-
- if (PQstatus(npgobj->cnx) == CONNECTION_BAD)
- {
- PyErr_SetString(PGError, PQerrorMessage(npgobj->cnx));
- Py_XDECREF(npgobj);
- return NULL;
- }
-
- return (PyObject *) npgobj;
-}
-
-/* pgobject methods */
-
-/* destructor */
-static void
-pg_dealloc(pgobject * self)
-{
- if (self->cnx)
- PQfinish(self->cnx);
-
- PyObject_Del(self);
-}
-
-/* close without deleting */
-static char pg_close__doc__[] =
-"close() -- close connection. All instances of the connection object and "
-"derived objects (queries and large objects) can no longer be used after "
-"this call.";
-
-static PyObject *
-pg_close(pgobject * self, PyObject * args)
-{
- /* gets args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_TypeError, "close().");
- return NULL;
- }
-
- if (self->cnx)
- PQfinish(self->cnx);
-
- self->cnx = NULL;
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-static void
-pgquery_dealloc(pgqueryobject * self)
-{
- if (self->last_result)
- PQclear(self->last_result);
-
- PyObject_Del(self);
-}
-
-/* resets connection */
-static char pg_reset__doc__[] =
-"reset() -- reset connection with current parameters. All derived queries "
-"and large objects derived from this connection will not be usable after "
-"this call.";
-
-static PyObject *
-pg_reset(pgobject * self, PyObject * args)
-{
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method reset() takes no parameters.");
- return NULL;
- }
-
- /* resets the connection */
- PQreset(self->cnx);
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* get connection socket */
-static char pg_fileno__doc__[] =
-"fileno() -- return database connection socket file handle.";
-
-static PyObject *
-pg_fileno(pgobject * self, PyObject * args)
-{
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method fileno() takes no parameters.");
- return NULL;
- }
-
-#ifdef NO_PQSOCKET
- return PyInt_FromLong((long) self->cnx->sock);
-#else
- return PyInt_FromLong((long) PQsocket(self->cnx));
-#endif
-}
-
-/* get number of rows */
-static char pgquery_ntuples__doc__[] =
-"ntuples() -- returns number of tuples returned by query.";
-
-static PyObject *
-pgquery_ntuples(pgqueryobject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method ntuples() takes no parameters.");
- return NULL;
- }
-
- return PyInt_FromLong((long) PQntuples(self->last_result));
-}
-
-/* list fields names from query result */
-static char pgquery_listfields__doc__[] =
-"listfields() -- Lists field names from result.";
-
-static PyObject *
-pgquery_listfields(pgqueryobject * self, PyObject * args)
-{
- int i,
- n;
- char *name;
- PyObject *fieldstuple,
- *str;
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method listfields() takes no parameters.");
- return NULL;
- }
-
- /* builds tuple */
- n = PQnfields(self->last_result);
- fieldstuple = PyTuple_New(n);
-
- for (i = 0; i < n; i++)
- {
- name = PQfname(self->last_result, i);
- str = PyString_FromString(name);
- PyTuple_SET_ITEM(fieldstuple, i, str);
- }
-
- return fieldstuple;
-}
-
-/* get field name from last result */
-static char pgquery_fieldname__doc__[] =
-"fieldname() -- returns name of field from result from its position.";
-
-static PyObject *
-pgquery_fieldname(pgqueryobject * self, PyObject * args)
-{
- int i;
- char *name;
-
- /* gets args */
- if (!PyArg_ParseTuple(args, "i", &i))
- {
- PyErr_SetString(PyExc_TypeError,
- "fieldname(number), with number(integer).");
- return NULL;
- }
-
- /* checks number validity */
- if (i >= PQnfields(self->last_result))
- {
- PyErr_SetString(PyExc_ValueError, "invalid field number.");
- return NULL;
- }
-
- /* gets fields name and builds object */
- name = PQfname(self->last_result, i);
- return PyString_FromString(name);
-}
-
-/* gets fields number from name in last result */
-static char pgquery_fieldnum__doc__[] =
-"fieldnum() -- returns position in query for field from its name.";
-
-static PyObject *
-pgquery_fieldnum(pgqueryobject * self, PyObject * args)
-{
- char *name;
- int num;
-
- /* gets args */
- if (!PyArg_ParseTuple(args, "s", &name))
- {
- PyErr_SetString(PyExc_TypeError, "fieldnum(name), with name (string).");
- return NULL;
- }
-
- /* gets field number */
- if ((num = PQfnumber(self->last_result, name)) == -1)
- {
- PyErr_SetString(PyExc_ValueError, "Unknown field.");
- return NULL;
- }
-
- return PyInt_FromLong(num);
-}
-
-/* retrieves last result */
-static char pgquery_getresult__doc__[] =
-"getresult() -- Gets the result of a query. The result is returned "
-"as a list of rows, each one a list of fields in the order returned "
-"by the server.";
-
-static PyObject *
-pgquery_getresult(pgqueryobject * self, PyObject * args)
-{
- PyObject *rowtuple,
- *reslist,
- *val;
- int i,
- j,
- m,
- n,
- *typ;
-
- /* checks args (args == NULL for an internal call) */
- if ((args != NULL) && (!PyArg_ParseTuple(args, "")))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method getresult() takes no parameters.");
- return NULL;
- }
-
- /* stores result in tuple */
- m = PQntuples(self->last_result);
- n = PQnfields(self->last_result);
- reslist = PyList_New(m);
-
- typ = get_type_array(self->last_result, n);
-
- for (i = 0; i < m; i++)
- {
- if ((rowtuple = PyTuple_New(n)) == NULL)
- {
- Py_DECREF(reslist);
- reslist = NULL;
- goto exit;
- }
-
- for (j = 0; j < n; j++)
- {
- int k;
- char *s = PQgetvalue(self->last_result, i, j);
- char cashbuf[64];
-
- if (PQgetisnull(self->last_result, i, j))
- {
- Py_INCREF(Py_None);
- val = Py_None;
- }
- else
- switch (typ[j])
- {
- case 1:
- val = PyInt_FromLong(strtol(s, NULL, 10));
- break;
-
- case 2:
- val = PyLong_FromLong(strtol(s, NULL, 10));
- break;
-
- case 3:
- val = PyFloat_FromDouble(strtod(s, NULL));
- break;
-
- case 4:
- {
- int mult = 1;
-
- if (*s == '$') /* there's talk of getting
- * rid of it */
- s++;
-
- if (*s == '-' || *s == '(')
- {
- s++;
- mult = -1;
- }
-
- /* get rid of the '$' and commas */
- if (*s == '$') /* Just in case we exposed
- * one */
- s++;
-
- for (k = 0; *s; s++)
- if (*s != ',')
- cashbuf[k++] = *s;
-
- cashbuf[k] = 0;
- val = PyFloat_FromDouble(strtod(cashbuf, NULL) * mult);
- break;
- }
-
- default:
- val = PyString_FromString(s);
- break;
- }
-
- if (val == NULL)
- {
- Py_DECREF(reslist);
- Py_DECREF(rowtuple);
- reslist = NULL;
- goto exit;
- }
-
- PyTuple_SET_ITEM(rowtuple, j, val);
- }
-
- PyList_SET_ITEM(reslist, i, rowtuple);
- }
-
-exit:
- free(typ);
-
- /* returns list */
- return reslist;
-}
-
-/* retrieves last result as a list of dictionaries*/
-static char pgquery_dictresult__doc__[] =
-"dictresult() -- Gets the result of a query. The result is returned "
-"as a list of rows, each one a dictionary with the field names used "
-"as the labels.";
-
-static PyObject *
-pgquery_dictresult(pgqueryobject * self, PyObject * args)
-{
- PyObject *dict,
- *reslist,
- *val;
- int i,
- j,
- m,
- n,
- *typ;
-
- /* checks args (args == NULL for an internal call) */
- if ((args != NULL) && (!PyArg_ParseTuple(args, "")))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method getresult() takes no parameters.");
- return NULL;
- }
-
- /* stores result in list */
- m = PQntuples(self->last_result);
- n = PQnfields(self->last_result);
- reslist = PyList_New(m);
-
- typ = get_type_array(self->last_result, n);
-
- for (i = 0; i < m; i++)
- {
- if ((dict = PyDict_New()) == NULL)
- {
- Py_DECREF(reslist);
- reslist = NULL;
- goto exit;
- }
-
- for (j = 0; j < n; j++)
- {
- int k;
- char *s = PQgetvalue(self->last_result, i, j);
- char cashbuf[64];
-
- if (PQgetisnull(self->last_result, i, j))
- {
- Py_INCREF(Py_None);
- val = Py_None;
- }
- else
- switch (typ[j])
- {
- case 1:
- val = PyInt_FromLong(strtol(s, NULL, 10));
- break;
-
- case 2:
- val = PyLong_FromLong(strtol(s, NULL, 10));
- break;
-
- case 3:
- val = PyFloat_FromDouble(strtod(s, NULL));
- break;
-
- case 4:
- {
- int mult = 1;
-
- if (*s == '$') /* there's talk of getting
- * rid of it */
- s++;
-
- if (*s == '-' || *s == '(')
- {
- s++;
- mult = -1;
- }
-
- /* get rid of the '$' and commas */
- if (*s == '$') /* Just in case we exposed
- * one */
- s++;
-
- for (k = 0;
- *s && k < sizeof(cashbuf) / sizeof(cashbuf[0]) - 1;
- s++)
- {
- if (*s != ',')
- cashbuf[k++] = *s;
- }
-
- cashbuf[k] = 0;
- val = PyFloat_FromDouble(strtod(cashbuf, NULL) * mult);
- break;
- }
-
- default:
- val = PyString_FromString(s);
- break;
- }
-
- if (val == NULL)
- {
- Py_DECREF(dict);
- Py_DECREF(reslist);
- reslist = NULL;
- goto exit;
- }
-
- PyDict_SetItemString(dict, PQfname(self->last_result, j), val);
- Py_DECREF(val);
- }
-
- PyList_SET_ITEM(reslist, i, dict);
- }
-
-exit:
- free(typ);
-
- /* returns list */
- return reslist;
-}
-
-/* gets asynchronous notify */
-static char pg_getnotify__doc__[] =
-"getnotify() -- get database notify for this connection.";
-
-static PyObject *
-pg_getnotify(pgobject * self, PyObject * args)
-{
- PGnotify *notify;
- PGresult *result;
- PyObject *notify_result,
- *temp;
-
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method getnotify() takes no parameters.");
- return NULL;
- }
-
- /* gets notify and builds result */
-
- /*
- * notifies only come back as result of a query, so I send an empty
- * query
- */
- Py_BEGIN_ALLOW_THREADS
- result = PQexec(self->cnx, " ");
- Py_END_ALLOW_THREADS
-
- if ((notify = PQnotifies(self->cnx)) != NULL)
- {
- if ((notify_result = PyTuple_New(2)) == NULL)
- {
- PQclear(result);
- return NULL;
- }
-
- if ((temp = PyString_FromString(notify->relname)) == NULL)
- {
- PQclear(result);
- return NULL;
- }
-
- PyTuple_SET_ITEM(notify_result, 0, temp);
-
- if ((temp = PyInt_FromLong(notify->be_pid)) == NULL)
- {
- PQclear(result);
- Py_DECREF(notify_result);
- return NULL;
- }
-
- PyTuple_SET_ITEM(notify_result, 1, temp);
- PQfreemem(notify);
- }
- else
- {
- Py_INCREF(Py_None);
- notify_result = Py_None;
- }
-
- PQclear(result);
-
- /* returns result */
- return notify_result;
-}
-
-/* source creation */
-static char pg_source__doc__[] =
-"source() -- creates a new source object for this connection";
-
-static PyObject *
-pg_source(pgobject * self, PyObject * args)
-{
- /* checks validity */
- if (!check_cnx_obj(self))
- return NULL;
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_TypeError, "method source() takes no parameter.");
- return NULL;
- }
-
- /* allocate new pg query object */
- return (PyObject *) pgsource_new(self);
-}
-
-/* database query */
-static char pg_query__doc__[] =
-"query(sql) -- creates a new query object for this connection,"
-" using sql (string) request.";
-
-static PyObject *
-pg_query(pgobject * self, PyObject * args)
-{
- char *query;
- PGresult *result;
- pgqueryobject *npgobj;
- int status;
-
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* get query args */
- if (!PyArg_ParseTuple(args, "s", &query))
- {
- PyErr_SetString(PyExc_TypeError, "query(sql), with sql (string).");
- return NULL;
- }
-
- /* frees previous result */
- if (self->last_result)
- {
- PQclear(self->last_result);
- self->last_result = NULL;
- }
-
- /* gets result */
- Py_BEGIN_ALLOW_THREADS
- result = PQexec(self->cnx, query);
- Py_END_ALLOW_THREADS
-
- /* checks result validity */
- if (!result)
- {
- PyErr_SetString(PyExc_ValueError, PQerrorMessage(self->cnx));
- return NULL;
- }
-
- /* checks result status */
- if ((status = PQresultStatus(result)) != PGRES_TUPLES_OK)
- {
- Oid oid;
-
- PQclear(result);
-
- switch (status)
- {
- case PGRES_EMPTY_QUERY:
- PyErr_SetString(PyExc_ValueError, "empty query.");
- break;
- case PGRES_BAD_RESPONSE:
- case PGRES_FATAL_ERROR:
- case PGRES_NONFATAL_ERROR:
- PyErr_SetString(PGError, PQerrorMessage(self->cnx));
- break;
- case PGRES_COMMAND_OK: /* could be an INSERT */
- if ((oid = PQoidValue(result)) == InvalidOid) /* nope */
- {
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- /* otherwise, return the oid */
- return PyInt_FromLong(oid);
-
- case PGRES_COPY_OUT: /* no data will be received */
- case PGRES_COPY_IN:
- Py_INCREF(Py_None);
- return Py_None;
- default:
- PyErr_SetString(PGError, "internal error: "
- "unknown result status.");
- break;
- }
-
- return NULL; /* error detected on query */
- }
-
- if ((npgobj = PyObject_NEW(pgqueryobject, &PgQueryType)) == NULL)
- return NULL;
-
- /* stores result and returns object */
- npgobj->last_result = result;
- return (PyObject *) npgobj;
-}
-
-#ifdef DIRECT_ACCESS
-static char pg_putline__doc__[] =
-"putline() -- sends a line directly to the backend";
-
-/* direct acces function : putline */
-static PyObject *
-pg_putline(pgobject * self, PyObject * args)
-{
- char *line;
-
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* reads args */
- if (!PyArg_ParseTuple(args, "s", &line))
- {
- PyErr_SetString(PyExc_TypeError, "putline(line), with line (string).");
- return NULL;
- }
-
- /* sends line to backend */
- PQputline(self->cnx, line);
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* direct access function : getline */
-static char pg_getline__doc__[] =
-"getline() -- gets a line directly from the backend.";
-
-static PyObject *
-pg_getline(pgobject * self, PyObject * args)
-{
- char line[MAX_BUFFER_SIZE];
- PyObject *str = NULL; /* GCC */
-
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method getline() takes no parameters.");
- return NULL;
- }
-
- /* gets line */
- switch (PQgetline(self->cnx, line, MAX_BUFFER_SIZE))
- {
- case 0:
- str = PyString_FromString(line);
- break;
- case 1:
- PyErr_SetString(PyExc_MemoryError, "buffer overflow");
- str = NULL;
- break;
- case EOF:
- Py_INCREF(Py_None);
- str = Py_None;
- break;
- }
-
- return str;
-}
-
-/* direct access function : end copy */
-static char pg_endcopy__doc__[] =
-"endcopy() -- synchronizes client and server";
-
-static PyObject *
-pg_endcopy(pgobject * self, PyObject * args)
-{
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method endcopy() takes no parameters.");
- return NULL;
- }
-
- /* ends direct copy */
- PQendcopy(self->cnx);
- Py_INCREF(Py_None);
- return Py_None;
-}
-#endif /* DIRECT_ACCESS */
-
-
-static PyObject *
-pgquery_print(pgqueryobject * self, FILE *fp, int flags)
-{
- PQprintOpt op;
-
- memset(&op, 0, sizeof(op));
- op.align = 1;
- op.header = 1;
- op.fieldSep = "|";
- op.pager = 1;
- PQprint(fp, self->last_result, &op);
- return 0;
-}
-
-static PyObject *
-pgquery_repr(pgqueryobject * self)
-{
- return PyString_FromString("<pg query result>");
-}
-
-/* insert table */
-static char pg_inserttable__doc__[] =
-"inserttable(string, list) -- insert list in table. The fields in the "
-"list must be in the same order as in the table.";
-
-static PyObject *
-pg_inserttable(pgobject * self, PyObject * args)
-{
- PGresult *result;
- char *table,
- *buffer,
- *bufpt,
- *temp;
- size_t bufsiz;
- PyObject *list,
- *sublist,
- *item;
- PyObject *(*getitem) (PyObject *, int);
- PyObject *(*getsubitem) (PyObject *, int);
- int i,
- j,
- m,
- n;
-
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "sO:filter", &table, &list))
- {
- PyErr_SetString(PyExc_TypeError,
- "tableinsert(table, content), with table (string) "
- "and content (list).");
- return NULL;
- }
-
- /* checks list type */
- if (PyTuple_Check(list))
- {
- m = PyTuple_Size(list);
- getitem = PyTuple_GetItem;
- }
- else if (PyList_Check(list))
- {
- m = PyList_Size(list);
- getitem = PyList_GetItem;
- }
- else
- {
- PyErr_SetString(PyExc_TypeError,
- "second arg must be some kind of array.");
- return NULL;
- }
-
- if (m)
- {
- /* not strictly necessary but removes a bogus warning */
- n = 0;
-
- /* checks sublists type and size */
- for (i = 0; i < m; i++)
- {
- sublist = getitem(list, i);
- if (PyTuple_Check(sublist))
- j = PyTuple_Size(sublist);
- else if (PyList_Check(sublist))
- j = PyList_Size(sublist);
- else
- {
- PyErr_SetString(PyExc_TypeError,
- "second arg must contain some kind of arrays.");
- return NULL;
- }
- if (i)
- {
- if (j != n)
- {
- PyErr_SetString(PyExc_TypeError,
- "arrays contained in second arg must have same size.");
- return NULL;
- }
- }
- else
- n = j; /* never used before this assignment */
- }
- if (n)
- {
- /* allocate buffer */
- if (!(buffer = malloc(MAX_BUFFER_SIZE)))
- {
- PyErr_SetString(PyExc_MemoryError,
- "can't allocate insert buffer.");
- return NULL;
- }
-
- /* starts query */
- sprintf(buffer, "copy %s from stdin", table);
-
- Py_BEGIN_ALLOW_THREADS
- result = PQexec(self->cnx, buffer);
- Py_END_ALLOW_THREADS
-
- if (!result)
- {
- free(buffer);
- PyErr_SetString(PyExc_ValueError, PQerrorMessage(self->cnx));
- return NULL;
- }
-
- PQclear(result);
-
- /* feeds table */
- for (i = 0; i < m; i++)
- {
- sublist = getitem(list, i);
- if (PyTuple_Check(sublist))
- getsubitem = PyTuple_GetItem;
- else
- getsubitem = PyList_GetItem;
-
- /* builds insert line */
- bufpt=buffer;
- bufsiz = MAX_BUFFER_SIZE - 1;
-
- for (j = 0; j < n; j++)
- {
- item = getsubitem(sublist, j);
- /* converts item to string */
- if (item == Py_None)
- {
- if (bufsiz > 2)
- {
- *bufpt++ = '\\'; *bufpt++ = 'N';
- bufsiz -= 2;
- }
- else
- bufsiz = 0;
- }
- else if (PyString_Check(item))
- {
- temp = PyString_AS_STRING(item);
- while (*temp && bufsiz)
- {
- if (*temp == '\\'
- || *temp == '\t'
- || *temp == '\n')
- {
- *bufpt++='\\'; --bufsiz;
- if (!bufsiz) break;
- }
- *bufpt++=*temp++; --bufsiz;
- }
- }
- else if (PyInt_Check(item))
- {
- long k;
- int h;
-
- k = PyInt_AsLong(item);
- h = snprintf(bufpt, bufsiz, "%ld", k);
- if (h > 0)
- {
- bufpt += h; bufsiz -= h;
- }
- else
- bufsiz = 0;
- }
- else if (PyLong_Check(item))
- {
- long k;
- int h;
-
- k = PyLong_AsLong(item);
- h = snprintf(bufpt, bufsiz, "%ld", k);
- if (h > 0)
- {
- bufpt += h; bufsiz -= h;
- }
- else
- bufsiz = 0;
- }
- else if (PyFloat_Check(item))
- {
- double k;
- int h;
-
- k = PyFloat_AS_DOUBLE(item);
- h = snprintf(bufpt, bufsiz, "%g", k);
- if (h > 0)
- {
- bufpt += h; bufsiz -= h;
- }
- else
- bufsiz = 0;
- }
- else
- {
- free(buffer);
- PyErr_SetString(PyExc_ValueError,
- "items must be strings, integers, "
- "longs or double (real).");
- return NULL;
- }
-
- if (j < n-1)
- {
- *bufpt++ = '\t'; --bufsiz;
- }
-
- if (bufsiz <= 0)
- {
- free(buffer);
- PyErr_SetString(PyExc_MemoryError,
- "insert buffer overflow.");
- return NULL;
- }
-
- }
-
- *bufpt++ = '\n'; *bufpt = '\0';
-
- /* sends data */
- PQputline(self->cnx, buffer);
- }
-
- /* ends query */
- PQputline(self->cnx, "\\.\n");
- PQendcopy(self->cnx);
- free(buffer);
- }
- }
-
- /* no error : returns nothing */
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-
-/* creates large object */
-static char pg_locreate__doc__[] =
-"locreate() -- creates a new large object in the database.";
-
-static PyObject *
-pg_locreate(pgobject * self, PyObject * args)
-{
- int mode;
- Oid lo_oid;
-
- /* checks validity */
- if (!check_cnx_obj(self))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "i", &mode))
- {
- PyErr_SetString(PyExc_TypeError,
- "locreate(mode), with mode (integer).");
- return NULL;
- }
-
- /* creates large object */
- lo_oid = lo_creat(self->cnx, mode);
- if (lo_oid == 0)
- {
- PyErr_SetString(PGError, "can't create large object.");
- return NULL;
- }
-
- return (PyObject *) pglarge_new(self, lo_oid);
-}
-
-/* init from already known oid */
-static char pg_getlo__doc__[] =
-"getlo(long) -- create a large object instance for the specified oid.";
-
-static PyObject *
-pg_getlo(pgobject * self, PyObject * args)
-{
- int lo_oid;
-
- /* checks validity */
- if (!check_cnx_obj(self))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "i", &lo_oid))
- {
- PyErr_SetString(PyExc_TypeError, "getlo(oid), with oid (integer).");
- return NULL;
- }
-
- if (!lo_oid)
- {
- PyErr_SetString(PyExc_ValueError, "the object oid can't be null.");
- return NULL;
- }
-
- /* creates object */
- return (PyObject *) pglarge_new(self, lo_oid);
-}
-
-/* import unix file */
-static char pg_loimport__doc__[] =
-"loimport(string) -- create a new large object from specified file.";
-
-static PyObject *
-pg_loimport(pgobject * self, PyObject * args)
-{
- char *name;
- Oid lo_oid;
-
- /* checks validity */
- if (!check_cnx_obj(self))
- return NULL;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "s", &name))
- {
- PyErr_SetString(PyExc_TypeError, "loimport(name), with name (string).");
- return NULL;
- }
-
- /* imports file and checks result */
- lo_oid = lo_import(self->cnx, name);
- if (lo_oid == 0)
- {
- PyErr_SetString(PGError, "can't create large object.");
- return NULL;
- }
-
- return (PyObject *) pglarge_new(self, lo_oid);
-}
-
-
-/* connection object methods */
-static struct PyMethodDef pgobj_methods[] = {
- {"source", (PyCFunction) pg_source, 1, pg_source__doc__},
- {"query", (PyCFunction) pg_query, 1, pg_query__doc__},
- {"reset", (PyCFunction) pg_reset, 1, pg_reset__doc__},
- {"close", (PyCFunction) pg_close, 1, pg_close__doc__},
- {"fileno", (PyCFunction) pg_fileno, 1, pg_fileno__doc__},
- {"getnotify", (PyCFunction) pg_getnotify, 1, pg_getnotify__doc__},
- {"inserttable", (PyCFunction) pg_inserttable, 1, pg_inserttable__doc__},
-
-#ifdef DIRECT_ACCESS
- {"putline", (PyCFunction) pg_putline, 1, pg_putline__doc__},
- {"getline", (PyCFunction) pg_getline, 1, pg_getline__doc__},
- {"endcopy", (PyCFunction) pg_endcopy, 1, pg_endcopy__doc__},
-#endif /* DIRECT_ACCESS */
-
-#ifdef LARGE_OBJECTS
- {"locreate", (PyCFunction) pg_locreate, 1, pg_locreate__doc__},
- {"getlo", (PyCFunction) pg_getlo, 1, pg_getlo__doc__},
- {"loimport", (PyCFunction) pg_loimport, 1, pg_loimport__doc__},
-#endif /* LARGE_OBJECTS */
-
- {NULL, NULL} /* sentinel */
-};
-
-/* get attribute */
-static PyObject *
-pg_getattr(pgobject * self, char *name)
-{
- /*
- * Although we could check individually, there are only a few
- * attributes that don't require a live connection and unless someone
- * has an urgent need, this will have to do
- */
- if (!self->cnx)
- {
- PyErr_SetString(PyExc_TypeError, "Connection is not valid");
- return NULL;
- }
-
- /* list postgreSQL connection fields */
-
- /* postmaster host */
- if (!strcmp(name, "host"))
- {
- char *r = PQhost(self->cnx);
-
- return r ? PyString_FromString(r) : PyString_FromString("localhost");
- }
-
- /* postmaster port */
- if (!strcmp(name, "port"))
- return PyInt_FromLong(atol(PQport(self->cnx)));
-
- /* selected database */
- if (!strcmp(name, "db"))
- return PyString_FromString(PQdb(self->cnx));
-
- /* selected options */
- if (!strcmp(name, "options"))
- return PyString_FromString(PQoptions(self->cnx));
-
- /* selected postgres tty */
- if (!strcmp(name, "tty"))
- return PyString_FromString(PQtty(self->cnx));
-
- /* error (status) message */
- if (!strcmp(name, "error"))
- return PyString_FromString(PQerrorMessage(self->cnx));
-
- /* connection status : 1 - OK, 0 - BAD */
- if (!strcmp(name, "status"))
- return PyInt_FromLong(PQstatus(self->cnx) == CONNECTION_OK ? 1 : 0);
-
- /* provided user name */
- if (!strcmp(name, "user"))
- return PyString_FromString("Deprecated facility");
- /* return PyString_FromString(fe_getauthname("<unknown user>")); */
-
- /* attributes list */
- if (!strcmp(name, "__members__"))
- {
- PyObject *list = PyList_New(8);
-
- if (list)
- {
- PyList_SET_ITEM(list, 0, PyString_FromString("host"));
- PyList_SET_ITEM(list, 1, PyString_FromString("port"));
- PyList_SET_ITEM(list, 2, PyString_FromString("db"));
- PyList_SET_ITEM(list, 3, PyString_FromString("options"));
- PyList_SET_ITEM(list, 4, PyString_FromString("tty"));
- PyList_SET_ITEM(list, 5, PyString_FromString("error"));
- PyList_SET_ITEM(list, 6, PyString_FromString("status"));
- PyList_SET_ITEM(list, 7, PyString_FromString("user"));
- }
-
- return list;
- }
-
- return Py_FindMethod(pgobj_methods, (PyObject *) self, name);
-}
-
-/* object type definition */
-staticforward PyTypeObject PgType = {
- PyObject_HEAD_INIT(NULL)
- 0, /* ob_size */
- "pgobject", /* tp_name */
- sizeof(pgobject), /* tp_basicsize */
- 0, /* tp_itemsize */
- /* methods */
- (destructor) pg_dealloc, /* tp_dealloc */
- 0, /* tp_print */
- (getattrfunc) pg_getattr, /* tp_getattr */
- 0, /* tp_setattr */
- 0, /* tp_compare */
- 0, /* tp_repr */
- 0, /* tp_as_number */
- 0, /* tp_as_sequence */
- 0, /* tp_as_mapping */
- 0, /* tp_hash */
-};
-
-
-/* query object methods */
-static struct PyMethodDef pgquery_methods[] = {
- {"getresult", (PyCFunction) pgquery_getresult, 1, pgquery_getresult__doc__},
- {"dictresult", (PyCFunction) pgquery_dictresult, 1, pgquery_dictresult__doc__},
- {"fieldname", (PyCFunction) pgquery_fieldname, 1, pgquery_fieldname__doc__},
- {"fieldnum", (PyCFunction) pgquery_fieldnum, 1, pgquery_fieldnum__doc__},
- {"listfields", (PyCFunction) pgquery_listfields, 1, pgquery_listfields__doc__},
- {"ntuples", (PyCFunction) pgquery_ntuples, 1, pgquery_ntuples__doc__},
- {NULL, NULL}
-};
-
-/* gets query object attributes */
-static PyObject *
-pgquery_getattr(pgqueryobject * self, char *name)
-{
- /* list postgreSQL connection fields */
- return Py_FindMethod(pgquery_methods, (PyObject *) self, name);
-}
-
-/* query type definition */
-staticforward PyTypeObject PgQueryType = {
- PyObject_HEAD_INIT(NULL)
- 0, /* ob_size */
- "pgqueryobject", /* tp_name */
- sizeof(pgqueryobject), /* tp_basicsize */
- 0, /* tp_itemsize */
- /* methods */
- (destructor) pgquery_dealloc, /* tp_dealloc */
- (printfunc) pgquery_print, /* tp_print */
- (getattrfunc) pgquery_getattr, /* tp_getattr */
- 0, /* tp_setattr */
- 0, /* tp_compare */
- (reprfunc) pgquery_repr, /* tp_repr */
- 0, /* tp_as_number */
- 0, /* tp_as_sequence */
- 0, /* tp_as_mapping */
- 0, /* tp_hash */
-};
-
-
-
-/* --------------------------------------------------------------------- */
-
-/* MODULE FUNCTIONS */
-
-#ifdef DEFAULT_VARS
-
-/* gets default host */
-static char getdefhost__doc__[] =
-"get_defhost() -- return default database host.";
-
-static PyObject *
-pggetdefhost(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_defhost() takes no parameter.");
- return NULL;
- }
-
- Py_XINCREF(pg_default_host);
- return pg_default_host;
-}
-
-/* sets default host */
-static char setdefhost__doc__[] =
-"set_defhost(string) -- set default database host. Return previous value.";
-
-static PyObject *
-pgsetdefhost(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_defhost(name), with name (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_host;
-
- if (temp)
- pg_default_host = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_host = Py_None;
- }
-
- return old;
-}
-
-/* gets default base */
-static char getdefbase__doc__[] =
-"get_defbase() -- return default database name.";
-
-static PyObject *
-pggetdefbase(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_defbase() takes no parameter.");
- return NULL;
- }
-
- Py_XINCREF(pg_default_base);
- return pg_default_base;
-}
-
-/* sets default base */
-static char setdefbase__doc__[] =
-"set_defbase(string) -- set default database name. Return previous value";
-
-static PyObject *
-pgsetdefbase(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_defbase(name), with name (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_base;
-
- if (temp)
- pg_default_base = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_base = Py_None;
- }
-
- return old;
-}
-
-/* gets default options */
-static char getdefopt__doc__[] =
-"get_defopt() -- return default database options.";
-
-static PyObject *
-pggetdefopt(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_defopt() takes no parameter.");
- return NULL;
- }
-
- Py_XINCREF(pg_default_opt);
- return pg_default_opt;
-}
-
-/* sets default opt */
-static char setdefopt__doc__[] =
-"set_defopt(string) -- set default database options. Return previous value.";
-
-static PyObject *
-pgsetdefopt(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_defopt(name), with name (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_opt;
-
- if (temp)
- pg_default_opt = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_opt = Py_None;
- }
-
- return old;
-}
-
-/* gets default tty */
-static char getdeftty__doc__[] =
-"get_deftty() -- return default database debug terminal.";
-
-static PyObject *
-pggetdeftty(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_deftty() takes no parameter.");
- return NULL;
- }
-
- Py_XINCREF(pg_default_tty);
- return pg_default_tty;
-}
-
-/* sets default tty */
-static char setdeftty__doc__[] =
-"set_deftty(string) -- set default database debug terminal. "
-"Return previous value.";
-
-static PyObject *
-pgsetdeftty(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_deftty(name), with name (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_tty;
-
- if (temp)
- pg_default_tty = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_tty = Py_None;
- }
-
- return old;
-}
-
-/* gets default username */
-static char getdefuser__doc__[] =
-"get_defuser() -- return default database username.";
-
-static PyObject *
-pggetdefuser(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_defuser() takes no parameter.");
-
- return NULL;
- }
-
- Py_XINCREF(pg_default_user);
- return pg_default_user;
-}
-
-/* sets default username */
-static char setdefuser__doc__[] =
-"set_defuser() -- set default database username. Return previous value.";
-
-static PyObject *
-pgsetdefuser(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_defuser(name), with name (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_user;
-
- if (temp)
- pg_default_user = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_user = Py_None;
- }
-
- return old;
-}
-
-/* sets default password */
-static char setdefpasswd__doc__[] =
-"set_defpasswd() -- set default database password.";
-
-static PyObject *
-pgsetdefpasswd(PyObject * self, PyObject * args)
-{
- char *temp = NULL;
- PyObject *old;
-
- /* gets arguments */
- if (!PyArg_ParseTuple(args, "z", &temp))
- {
- PyErr_SetString(PyExc_TypeError,
- "set_defpasswd(password), with password (string/None).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_passwd;
-
- if (temp)
- pg_default_passwd = PyString_FromString(temp);
- else
- {
- Py_INCREF(Py_None);
- pg_default_passwd = Py_None;
- }
-
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-/* gets default port */
-static char getdefport__doc__[] =
-"get_defport() -- return default database port.";
-
-static PyObject *
-pggetdefport(PyObject * self, PyObject * args)
-{
- /* checks args */
- if (!PyArg_ParseTuple(args, ""))
- {
- PyErr_SetString(PyExc_SyntaxError,
- "method get_defport() takes no parameter.");
- return NULL;
- }
-
- Py_XINCREF(pg_default_port);
- return pg_default_port;
-}
-
-/* sets default port */
-static char setdefport__doc__[] =
-"set_defport(integer) -- set default database port. Return previous value.";
-
-static PyObject *
-pgsetdefport(PyObject * self, PyObject * args)
-{
- long int port = -2;
- PyObject *old;
-
- /* gets arguments */
- if ((!PyArg_ParseTuple(args, "l", &port)) || (port < -1))
- {
- PyErr_SetString(PyExc_TypeError, "set_defport(port), with port "
- "(positive integer/-1).");
- return NULL;
- }
-
- /* adjusts value */
- old = pg_default_port;
-
- if (port != -1)
- pg_default_port = PyLong_FromLong(port);
- else
- {
- Py_INCREF(Py_None);
- pg_default_port = Py_None;
- }
-
- return old;
-}
-#endif /* DEFAULT_VARS */
-
-/* List of functions defined in the module */
-
-static struct PyMethodDef pg_methods[] = {
- {"connect", (PyCFunction) pgconnect, 3, connect__doc__},
-
-#ifdef DEFAULT_VARS
- {"get_defhost", pggetdefhost, 1, getdefhost__doc__},
- {"set_defhost", pgsetdefhost, 1, setdefhost__doc__},
- {"get_defbase", pggetdefbase, 1, getdefbase__doc__},
- {"set_defbase", pgsetdefbase, 1, setdefbase__doc__},
- {"get_defopt", pggetdefopt, 1, getdefopt__doc__},
- {"set_defopt", pgsetdefopt, 1, setdefopt__doc__},
- {"get_deftty", pggetdeftty, 1, getdeftty__doc__},
- {"set_deftty", pgsetdeftty, 1, setdeftty__doc__},
- {"get_defport", pggetdefport, 1, getdefport__doc__},
- {"set_defport", pgsetdefport, 1, setdefport__doc__},
- {"get_defuser", pggetdefuser, 1, getdefuser__doc__},
- {"set_defuser", pgsetdefuser, 1, setdefuser__doc__},
- {"set_defpasswd", pgsetdefpasswd, 1, setdefpasswd__doc__},
-#endif /* DEFAULT_VARS */
- {NULL, NULL} /* sentinel */
-};
-
-static char pg__doc__[] = "Python interface to PostgreSQL DB";
-
-/* Initialization function for the module */
-DL_EXPORT(void)
-init_pg(void)
-{
- PyObject *mod,
- *dict,
- *v;
-
- /* Initialize here because some WIN platforms get confused otherwise */
- PglargeType.ob_type = PgType.ob_type = PgQueryType.ob_type =
- PgSourceType.ob_type = &PyType_Type;
-
- /* Create the module and add the functions */
- mod = Py_InitModule4("_pg", pg_methods, pg__doc__, NULL, PYTHON_API_VERSION);
- dict = PyModule_GetDict(mod);
-
- /* Add some symbolic constants to the module */
- PGError = PyString_FromString("_pg.error");
- PyDict_SetItemString(dict, "error", PGError);
-
- /* Make the version available */
- v = PyString_FromString(PyPgVersion);
- PyDict_SetItemString(dict, "version", v);
- PyDict_SetItemString(dict, "__version__", v);
- Py_DECREF(v);
-
- /* results type for queries */
- PyDict_SetItemString(dict, "RESULT_EMPTY", PyInt_FromLong(RESULT_EMPTY));
- PyDict_SetItemString(dict, "RESULT_DML", PyInt_FromLong(RESULT_DML));
- PyDict_SetItemString(dict, "RESULT_DDL", PyInt_FromLong(RESULT_DDL));
- PyDict_SetItemString(dict, "RESULT_DQL", PyInt_FromLong(RESULT_DQL));
-
-#ifdef LARGE_OBJECTS
- /* create mode for large objects */
- PyDict_SetItemString(dict, "INV_READ", PyInt_FromLong(INV_READ));
- PyDict_SetItemString(dict, "INV_WRITE", PyInt_FromLong(INV_WRITE));
-
- /* position flags for lo_lseek */
- PyDict_SetItemString(dict, "SEEK_SET", PyInt_FromLong(SEEK_SET));
- PyDict_SetItemString(dict, "SEEK_CUR", PyInt_FromLong(SEEK_CUR));
- PyDict_SetItemString(dict, "SEEK_END", PyInt_FromLong(SEEK_END));
-#endif /* LARGE_OBJECTS */
-
-#ifdef DEFAULT_VARS
- /* prepares default values */
- Py_INCREF(Py_None);
- pg_default_host = Py_None;
- Py_INCREF(Py_None);
- pg_default_base = Py_None;
- Py_INCREF(Py_None);
- pg_default_opt = Py_None;
- Py_INCREF(Py_None);
- pg_default_port = Py_None;
- Py_INCREF(Py_None);
- pg_default_tty = Py_None;
- Py_INCREF(Py_None);
- pg_default_user = Py_None;
- Py_INCREF(Py_None);
- pg_default_passwd = Py_None;
-#endif /* DEFAULT_VARS */
-
- /* Check for errors */
- if (PyErr_Occurred())
- Py_FatalError("can't initialize module _pg");
-}
+++ /dev/null
-#!/usr/bin/env python
-
-# Setup script for the PyGreSQL version 3
-# created 2000/04 Mark Alexander <mwa@gate.net>
-# tweaked 2000/05 Jeremy Hylton <jeremy@cnri.reston.va.us>
-# win32 support 2001/01 Gerhard Haering <gerhard@bigfoot.de>
-
-# requires distutils; standard in Python 1.6, otherwise download from
-# http://www.python.org/sigs/distutils-sig/download.html
-
-# You may have to change the first 3 variables (include_dirs,
-# library_dirs, optional_libs) to match your postgres distribution.
-
-# Now, you can:
-# python setup.py build # to build the module
-# python setup.py install # to install it
-
-# See http://www.python.org/sigs/distutils-sig/doc/ for more information
-# on using distutils to install Python programs.
-
-from distutils.core import setup
-from distutils.extension import Extension
-import sys
-
-if sys.platform == "win32":
- # If you want to build from source; you must have built a win32 native libpq # before and copied libpq.dll into the PyGreSQL root directory.
- win_pg_build_root = 'd:/dev/pg/postgresql-7.0.2/'
- include_dirs=[ win_pg_build_root + 'src/include', win_pg_build_root + '/src/include/libpq', win_pg_build_root + 'src', win_pg_build_root + 'src/interfaces/libpq' ]
- library_dirs=[ win_pg_build_root + 'src/interfaces/libpq/Release' ]
- optional_libs=[ 'libpqdll', 'wsock32', 'advapi32' ]
- data_files = [ 'libpq.dll' ]
-else:
- include_dirs=['../../include','../libpq','/usr/include/pgsql']
- library_dirs=['../libpq','/usr/lib/pgsql']
- optional_libs=['pq']
- data_files = []
-
-setup (name = "PyGreSQL",
- version = "3.3",
- description = "Python PostgreSQL Interfaces",
- author = "D'Arcy J. M. Cain",
- author_email = "darcy@druid.net",
- url = "http://www.druid.net/pygresql/",
- licence = "Python",
-
- py_modules = ['pg', 'pgdb'],
- ext_modules = [ Extension(
- name='_pg',
- sources = ['pgmodule.c'],
- include_dirs = include_dirs,
- library_dirs = library_dirs,
- libraries = optional_libs
- )],
- data_files = data_files
-)
-
+++ /dev/null
-#! /usr/bin/env python
-# advanced.py - demo of advanced features of PostGres. Some may not be ANSI.
-# inspired from the Postgres tutorial
-# adapted to Python 1995 by Pascal Andre
-
-print """
-__________________________________________________________________
-MODULE ADVANCED.PY : ADVANCED POSTGRES SQL COMMANDS TUTORIAL
-
-This module is designed for being imported from python prompt
-
-In order to run the samples included here, first create a connection
-using : cnx = advanced.DB(...)
-
-The "..." should be replaced with whatever arguments you need to open an
-existing database. Usually all you need is the name of the database and,
-in fact, if it is the same as your login name, you can leave it empty.
-
-then start the demo with: advanced.demo(cnx)
-__________________________________________________________________
-"""
-
-from pg import DB
-import sys
-
-# waits for a key
-def wait_key():
- print "Press <enter>"
- sys.stdin.read(1)
-
-# inheritance features
-def inherit_demo(pgcnx):
- print "-----------------------------"
- print "-- Inheritance:"
- print "-- a table can inherit from zero or more tables. A query"
- print "-- can reference either all rows of a table or all rows "
- print "-- of a table plus all of its descendants."
- print "-----------------------------"
- print
- print "-- For example, the capitals table inherits from cities table."
- print "-- (It inherits all data fields from cities.)"
- print
- print "CREATE TABLE cities ("
- print " name text,"
- print " population float8,"
- print " altitude int"
- print ")"
- print
- print "CREATE TABLE capitals ("
- print " state varchar(2)"
- print ") INHERITS (cities)"
- pgcnx.query("""CREATE TABLE cities (
- name text,
- population float8,
- altitude int)""")
- pgcnx.query("""CREATE TABLE capitals (
- state varchar(2)) INHERITS (cities)""")
- wait_key()
- print
- print "-- now, let's populate the tables"
- print
- print "INSERT INTO cities VALUES ('San Francisco', 7.24E+5, 63)"
- print "INSERT INTO cities VALUES ('Las Vegas', 2.583E+5, 2174)"
- print "INSERT INTO cities VALUES ('Mariposa', 1200, 1953)"
- print
- print "INSERT INTO capitals VALUES ('Sacramento', 3.694E+5, 30, 'CA')"
- print "INSERT INTO capitals VALUES ('Madison', 1.913E+5, 845, 'WI')"
- print
- pgcnx.query("INSERT INTO cities VALUES ('San Francisco', 7.24E+5, 63)")
- pgcnx.query("INSERT INTO cities VALUES ('Las Vegas', 2.583E+5, 2174)")
- pgcnx.query("INSERT INTO cities VALUES ('Mariposa', 1200, 1953)")
- pgcnx.query("INSERT INTO capitals VALUES ('Sacramento',3.694E+5,30,'CA')")
- pgcnx.query("INSERT INTO capitals VALUES ('Madison', 1.913E+5, 845, 'WI')")
- print
- print "SELECT * FROM cities"
- print pgcnx.query("SELECT * FROM cities")
- print "SELECT * FROM capitals"
- print pgcnx.query("SELECT * FROM capitals")
- print
- print "-- like before, a regular query references rows of the base"
- print "-- table only"
- print
- print "SELECT name, altitude"
- print "FROM cities"
- print "WHERE altitude > 500;"
- print pgcnx.query("""SELECT name, altitude
- FROM cities
- WHERE altitude > 500""")
- print
- print "-- on the other hand, you can find all cities, including "
- print "-- capitals, that are located at an altitude of 500 'ft "
- print "-- or higher by:"
- print
- print "SELECT c.name, c.altitude"
- print "FROM cities* c"
- print "WHERE c.altitude > 500"
- print pgcnx.query("""SELECT c.name, c.altitude
- FROM cities* c
- WHERE c.altitude > 500""")
-
-# arrays attributes
-def array_demo(pgcnx):
- print "----------------------"
- print "-- Arrays:"
- print "-- attributes can be arrays of base types or user-defined "
- print "-- types"
- print "----------------------"
- print
- print "CREATE TABLE sal_emp ("
- print " name text,"
- print " pay_by_quarter int4[],"
- print " pay_by_extra_quarter int8[],"
- print " schedule text[][]"
- print ")"
- pgcnx.query("""CREATE TABLE sal_emp (
- name text,
- pay_by_quarter int4[],
- pay_by_extra_quarter int8[],
- schedule text[][])""")
- wait_key()
- print
- print "-- insert instances with array attributes. "
- print " Note the use of braces"
- print
- print "INSERT INTO sal_emp VALUES ("
- print " 'Bill',"
- print " '{10000,10000,10000,10000}',"
- print " '{9223372036854775800,9223372036854775800,9223372036854775800}',"
- print " '{{\"meeting\", \"lunch\"}, {}}')"
- print
- print "INSERT INTO sal_emp VALUES ("
- print " 'Carol',"
- print " '{20000,25000,25000,25000}',"
- print " '{9223372036854775807,9223372036854775807,9223372036854775807}',"
- print " '{{\"talk\", \"consult\"}, {\"meeting\"}}')"
- print
- pgcnx.query("""INSERT INTO sal_emp VALUES (
- 'Bill', '{10000,10000,10000,10000}',
- '{9223372036854775800,9223372036854775800,9223372036854775800}',
- '{{\"meeting\", \"lunch\"}, {}}')""")
- pgcnx.query("""INSERT INTO sal_emp VALUES (
- 'Carol', '{20000,25000,25000,25000}',
- '{9223372036854775807,9223372036854775807,9223372036854775807}',
- '{{\"talk\", \"consult\"}, {\"meeting\"}}')""")
- wait_key()
- print
- print "----------------------"
- print "-- queries on array attributes"
- print "----------------------"
- print
- print "SELECT name FROM sal_emp WHERE"
- print " sal_emp.pay_by_quarter[1] <> sal_emp.pay_by_quarter[2]"
- print
- print pgcnx.query("""SELECT name FROM sal_emp WHERE
- sal_emp.pay_by_quarter[1] <> sal_emp.pay_by_quarter[2]""")
- print
- print pgcnx.query("""SELECT name FROM sal_emp WHERE
- sal_emp.pay_by_extra_quarter[1] <> sal_emp.pay_by_extra_quarter[2]""")
- print
- print "-- retrieve third quarter pay of all employees"
- print
- print "SELECT sal_emp.pay_by_quarter[3] FROM sal_emp"
- print
- print pgcnx.query("SELECT sal_emp.pay_by_quarter[3] FROM sal_emp")
- print
- print "-- retrieve third quarter extra pay of all employees"
- print
- print "SELECT sal_emp.pay_by_extra_quarter[3] FROM sal_emp"
- print pgcnx.query("SELECT sal_emp.pay_by_extra_quarter[3] FROM sal_emp")
- print
- print "-- retrieve first two quarters of extra quarter pay of all employees"
- print
- print "SELECT sal_emp.pay_by_extra_quarter[1:2] FROM sal_emp"
- print
- print pgcnx.query("SELECT sal_emp.pay_by_extra_quarter[1:2] FROM sal_emp")
- print
- print "-- select subarrays"
- print
- print "SELECT sal_emp.schedule[1:2][1:1] FROM sal_emp WHERE"
- print " sal_emp.name = 'Bill'"
- print pgcnx.query("SELECT sal_emp.schedule[1:2][1:1] FROM sal_emp WHERE " \
- "sal_emp.name = 'Bill'")
-
-# base cleanup
-def demo_cleanup(pgcnx):
- print "-- clean up (you must remove the children first)"
- print "DROP TABLE sal_emp"
- print "DROP TABLE capitals"
- print "DROP TABLE cities;"
- pgcnx.query("DROP TABLE sal_emp")
- pgcnx.query("DROP TABLE capitals")
- pgcnx.query("DROP TABLE cities")
-
-# main demo function
-def demo(pgcnx):
- inherit_demo(pgcnx)
- array_demo(pgcnx)
- demo_cleanup(pgcnx)
+++ /dev/null
-#! /usr/bin/env python
-# basics.py - basic SQL commands tutorial
-# inspired from the Postgres95 tutorial
-# adapted to Python 1995 by Pascal ANDRE
-
-print """
-__________________________________________________________________
-MODULE BASICS.PY : BASIC POSTGRES SQL COMMANDS TUTORIAL
-
-This module is designed for being imported from python prompt
-
-In order to run the samples included here, first create a connection
-using : cnx = basics.DB(...)
-
-The "..." should be replaced with whatever arguments you need to open an
-existing database. Usually all you need is the name of the database and,
-in fact, if it is the same as your login name, you can leave it empty.
-
-then start the demo with: basics.demo(cnx)
-__________________________________________________________________
-"""
-
-from pg import DB
-import sys
-
-# waits for a key
-def wait_key():
- print "Press <enter>"
- sys.stdin.read(1)
-
-# table creation commands
-def create_table(pgcnx):
- print "-----------------------------"
- print "-- Creating a table:"
- print "-- a CREATE TABLE is used to create base tables. POSTGRES"
- print "-- SQL has its own set of built-in types. (Note that"
- print "-- keywords are case-insensitive but identifiers are "
- print "-- case-sensitive.)"
- print "-----------------------------"
- print
- print "Sending query :"
- print "CREATE TABLE weather ("
- print " city varchar(80),"
- print " temp_lo int,"
- print " temp_hi int,"
- print " prcp float8,"
- print " date date"
- print ")"
- pgcnx.query("""CREATE TABLE weather (city varchar(80), temp_lo int,
- temp_hi int, prcp float8, date date)""")
- print
- print "Sending query :"
- print "CREATE TABLE cities ("
- print " name varchar(80),"
- print " location point"
- print ")"
- pgcnx.query("""CREATE TABLE cities (
- name varchar(80),
- location point)""")
-
-# data insertion commands
-def insert_data(pgcnx):
- print "-----------------------------"
- print "-- Inserting data:"
- print "-- an INSERT statement is used to insert a new row into"
- print "-- a table. There are several ways you can specify what"
- print "-- columns the data should go to."
- print "-----------------------------"
- print
- print "-- 1. the simplest case is when the list of value correspond to"
- print "-- the order of the columns specified in CREATE TABLE."
- print
- print "Sending query :"
- print "INSERT INTO weather "
- print " VALUES ('San Francisco', 46, 50, 0.25, '11/27/1994')"
- pgcnx.query("""INSERT INTO weather
- VALUES ('San Francisco', 46, 50, 0.25, '11/27/1994')""")
- print
- print "Sending query :"
- print "INSERT INTO cities "
- print " VALUES ('San Francisco', '(-194.0, 53.0)')"
- pgcnx.query("""INSERT INTO cities
- VALUES ('San Francisco', '(-194.0, 53.0)')""")
- print
- wait_key()
- print "-- 2. you can also specify what column the values correspond "
- print " to. (The columns can be specified in any order. You may "
- print " also omit any number of columns. eg. unknown precipitation"
- print " below)"
- print "Sending query :"
- print "INSERT INTO weather (city, temp_lo, temp_hi, prcp, date)"
- print " VALUES ('San Francisco', 43, 57, 0.0, '11/29/1994')"
- pgcnx.query("INSERT INTO weather (date, city, temp_hi, temp_lo)" \
- "VALUES ('11/29/1994', 'Hayward', 54, 37)")
-
-# direct selection commands
-def select_data1(pgcnx):
- print "-----------------------------"
- print "-- Retrieving data:"
- print "-- a SELECT statement is used for retrieving data. The "
- print "-- basic syntax is:"
- print "-- SELECT columns FROM tables WHERE predicates"
- print "-----------------------------"
- print
- print "-- a simple one would be the query:"
- print "SELECT * FROM weather"
- print
- print "The result is :"
- q = pgcnx.query("SELECT * FROM weather")
- print q
- print
- print "-- you may also specify expressions in the target list (the "
- print "-- 'AS column' specifies the column name of the result. It is "
- print "-- optional.)"
- print "The query :"
- print " SELECT city, (temp_hi+temp_lo)/2 AS temp_avg, date "
- print " FROM weather"
- print "Gives :"
- print pgcnx.query("""SELECT city, (temp_hi+temp_lo)/2
- AS temp_avg, date FROM weather""")
- print
- print "-- if you want to retrieve rows that satisfy certain condition"
- print "-- (ie. a restriction), specify the condition in WHERE. The "
- print "-- following retrieves the weather of San Francisco on rainy "
- print "-- days."
- print "SELECT *"
- print "FROM weather"
- print "WHERE city = 'San Francisco' "
- print " and prcp > 0.0"
- print pgcnx.query("""SELECT * FROM weather WHERE city = 'San Francisco'
- AND prcp > 0.0""")
- print
- print "-- here is a more complicated one. Duplicates are removed when "
- print "-- DISTINCT is specified. ORDER BY specifies the column to sort"
- print "-- on. (Just to make sure the following won't confuse you, "
- print "-- DISTINCT and ORDER BY can be used separately.)"
- print "SELECT DISTINCT city"
- print "FROM weather"
- print "ORDER BY city;"
- print pgcnx.query("SELECT DISTINCT city FROM weather ORDER BY city")
-
-# selection to a temporary table
-def select_data2(pgcnx):
- print "-----------------------------"
- print "-- Retrieving data into other classes:"
- print "-- a SELECT ... INTO statement can be used to retrieve "
- print "-- data into another class."
- print "-----------------------------"
- print
- print "The query :"
- print "SELECT * INTO TABLE temptab "
- print "FROM weather"
- print "WHERE city = 'San Francisco' "
- print " and prcp > 0.0"
- pgcnx.query("""SELECT * INTO TABLE temptab FROM weather
- WHERE city = 'San Francisco' and prcp > 0.0""")
- print "Fills the table temptab, that can be listed with :"
- print "SELECT * from temptab"
- print pgcnx.query("SELECT * from temptab")
-
-# aggregate creation commands
-def create_aggregate(pgcnx):
- print "-----------------------------"
- print "-- Aggregates"
- print "-----------------------------"
- print
- print "Let's consider the query :"
- print "SELECT max(temp_lo)"
- print "FROM weather;"
- print pgcnx.query("SELECT max(temp_lo) FROM weather")
- print
- print "-- Aggregate with GROUP BY"
- print "SELECT city, max(temp_lo)"
- print "FROM weather "
- print "GROUP BY city;"
- print pgcnx.query( """SELECT city, max(temp_lo)
- FROM weather GROUP BY city""")
-
-# table join commands
-def join_table(pgcnx):
- print "-----------------------------"
- print "-- Joining tables:"
- print "-- queries can access multiple tables at once or access"
- print "-- the same table in such a way that multiple instances"
- print "-- of the table are being processed at the same time."
- print "-----------------------------"
- print
- print "-- suppose we want to find all the records that are in the "
- print "-- temperature range of other records. W1 and W2 are aliases "
- print "--for weather."
- print
- print "SELECT W1.city, W1.temp_lo, W1.temp_hi, "
- print " W2.city, W2.temp_lo, W2.temp_hi"
- print "FROM weather W1, weather W2"
- print "WHERE W1.temp_lo < W2.temp_lo "
- print " and W1.temp_hi > W2.temp_hi"
- print
- print pgcnx.query("""SELECT W1.city, W1.temp_lo, W1.temp_hi,
- W2.city, W2.temp_lo, W2.temp_hi FROM weather W1, weather W2
- WHERE W1.temp_lo < W2.temp_lo and W1.temp_hi > W2.temp_hi""")
- print
- print "-- let's join two tables. The following joins the weather table"
- print "-- and the cities table."
- print
- print "SELECT city, location, prcp, date"
- print "FROM weather, cities"
- print "WHERE name = city"
- print
- print pgcnx.query("""SELECT city, location, prcp, date FROM weather, cities
- WHERE name = city""")
- print
- print "-- since the column names are all different, we don't have to "
- print "-- specify the table name. If you want to be clear, you can do "
- print "-- the following. They give identical results, of course."
- print
- print "SELECT w.city, c.location, w.prcp, w.date"
- print "FROM weather w, cities c"
- print "WHERE c.name = w.city;"
- print
- print pgcnx.query("""SELECT w.city, c.location, w.prcp, w.date
- FROM weather w, cities c WHERE c.name = w.city""")
-
-# data updating commands
-def update_data(pgcnx):
- print "-----------------------------"
- print "-- Updating data:"
- print "-- an UPDATE statement is used for updating data. "
- print "-----------------------------"
- print
- print "-- suppose you discover the temperature readings are all off by"
- print "-- 2 degrees as of Nov 28, you may update the data as follow:"
- print
- print "UPDATE weather"
- print " SET temp_hi = temp_hi - 2, temp_lo = temp_lo - 2"
- print " WHERE date > '11/28/1994'"
- print
- pgcnx.query("""UPDATE weather
- SET temp_hi = temp_hi - 2, temp_lo = temp_lo - 2
- WHERE date > '11/28/1994'""")
- print
- print "SELECT * from weather"
- print pgcnx.query("SELECT * from weather")
-
-# data deletion commands
-def delete_data(pgcnx):
- print "-----------------------------"
- print "-- Deleting data:"
- print "-- a DELETE statement is used for deleting rows from a "
- print "-- table."
- print "-----------------------------"
- print
- print "-- suppose you are no longer interested in the weather of "
- print "-- Hayward, you can do the following to delete those rows from"
- print "-- the table"
- print
- print "DELETE FROM weather WHERE city = 'Hayward'"
- pgcnx.query("DELETE FROM weather WHERE city = 'Hayward'")
- print
- print "SELECT * from weather"
- print
- print pgcnx.query("SELECT * from weather")
- print
- print "-- you can also delete all the rows in a table by doing the "
- print "-- following. (This is different from DROP TABLE which removes "
- print "-- the table in addition to the removing the rows.)"
- print
- print "DELETE FROM weather"
- pgcnx.query("DELETE FROM weather")
- print
- print "SELECT * from weather"
- print pgcnx.query("SELECT * from weather")
-
-# table removal commands
-def remove_table(pgcnx):
- print "-----------------------------"
- print "-- Removing the tables:"
- print "-- DROP TABLE is used to remove tables. After you have"
- print "-- done this, you can no longer use those tables."
- print "-----------------------------"
- print
- print "DROP TABLE weather, cities, temptab"
- pgcnx.query("DROP TABLE weather, cities, temptab")
-
-# main demo function
-def demo(pgcnx):
- create_table(pgcnx)
- wait_key()
- insert_data(pgcnx)
- wait_key()
- select_data1(pgcnx)
- select_data2(pgcnx)
- create_aggregate(pgcnx)
- join_table(pgcnx)
- update_data(pgcnx)
- delete_data(pgcnx)
- remove_table(pgcnx)
+++ /dev/null
-# func.py - demonstrate the use of SQL functions
-# inspired from the PostgreSQL tutorial
-# adapted to Python 1995 by Pascal ANDRE
-
-print """
-__________________________________________________________________
-MODULE FUNC.PY : SQL FUNCTION DEFINITION TUTORIAL
-
-This module is designed for being imported from python prompt
-
-In order to run the samples included here, first create a connection
-using : cnx = func.DB(...)
-
-The "..." should be replaced with whatever arguments you need to open an
-existing database. Usually all you need is the name of the database and,
-in fact, if it is the same as your login name, you can leave it empty.
-
-then start the demo with: func.demo(cnx)
-__________________________________________________________________
-"""
-
-from pg import DB
-import sys
-
-# waits for a key
-def wait_key():
- print "Press <enter>"
- sys.stdin.read(1)
-
-# basic functions declaration
-def base_func(pgcnx):
- print "-----------------------------"
- print "-- Creating SQL Functions on Base Types"
- print "-- a CREATE FUNCTION statement lets you create a new "
- print "-- function that can be used in expressions (in SELECT, "
- print "-- INSERT, etc.). We will start with functions that "
- print "-- return values of base types."
- print "-----------------------------"
- print
- print "--"
- print "-- let's create a simple SQL function that takes no arguments"
- print "-- and returns 1"
- print
- print "CREATE FUNCTION one() RETURNS int4"
- print " AS 'SELECT 1 as ONE' LANGUAGE 'sql'"
- pgcnx.query("""CREATE FUNCTION one() RETURNS int4
- AS 'SELECT 1 as ONE' LANGUAGE 'sql'""")
- wait_key()
- print
- print "--"
- print "-- functions can be used in any expressions (eg. in the target"
- print "-- list or qualifications)"
- print
- print "SELECT one() AS answer"
- print pgcnx.query("SELECT one() AS answer")
- print
- print "--"
- print "-- here's how you create a function that takes arguments. The"
- print "-- following function returns the sum of its two arguments:"
- print
- print "CREATE FUNCTION add_em(int4, int4) RETURNS int4"
- print " AS 'SELECT $1 + $2' LANGUAGE 'sql'"
- pgcnx.query("""CREATE FUNCTION add_em(int4, int4) RETURNS int4
- AS 'SELECT $1 + $2' LANGUAGE 'sql'""")
- print
- print "SELECT add_em(1, 2) AS answer"
- print pgcnx.query("SELECT add_em(1, 2) AS answer")
-
-# functions on composite types
-def comp_func(pgcnx):
- print "-----------------------------"
- print "-- Creating SQL Functions on Composite Types"
- print "-- it is also possible to create functions that return"
- print "-- values of composite types."
- print "-----------------------------"
- print
- print "-- before we create more sophisticated functions, let's "
- print "-- populate an EMP table"
- print
- print "CREATE TABLE EMP ("
- print " name text,"
- print " salary int4,"
- print " age int4,"
- print " dept varchar(16)"
- print ")"
- pgcnx.query("""CREATE TABLE EMP (
- name text,
- salary int4,
- age int4,
- dept varchar(16))""")
- print
- print "INSERT INTO EMP VALUES ('Sam', 1200, 16, 'toy')"
- print "INSERT INTO EMP VALUES ('Claire', 5000, 32, 'shoe')"
- print "INSERT INTO EMP VALUES ('Andy', -1000, 2, 'candy')"
- print "INSERT INTO EMP VALUES ('Bill', 4200, 36, 'shoe')"
- print "INSERT INTO EMP VALUES ('Ginger', 4800, 30, 'candy')"
- pgcnx.query("INSERT INTO EMP VALUES ('Sam', 1200, 16, 'toy')")
- pgcnx.query("INSERT INTO EMP VALUES ('Claire', 5000, 32, 'shoe')")
- pgcnx.query("INSERT INTO EMP VALUES ('Andy', -1000, 2, 'candy')")
- pgcnx.query("INSERT INTO EMP VALUES ('Bill', 4200, 36, 'shoe')")
- pgcnx.query("INSERT INTO EMP VALUES ('Ginger', 4800, 30, 'candy')")
- wait_key()
- print
- print "-- the argument of a function can also be a tuple. For "
- print "-- instance, double_salary takes a tuple of the EMP table"
- print
- print "CREATE FUNCTION double_salary(EMP) RETURNS int4"
- print " AS 'SELECT $1.salary * 2 AS salary' LANGUAGE 'sql'"
- pgcnx.query("""CREATE FUNCTION double_salary(EMP) RETURNS int4
- AS 'SELECT $1.salary * 2 AS salary' LANGUAGE 'sql'""")
- print
- print "SELECT name, double_salary(EMP) AS dream"
- print "FROM EMP"
- print "WHERE EMP.dept = 'toy'"
- print pgcnx.query("""SELECT name, double_salary(EMP) AS dream
- FROM EMP WHERE EMP.dept = 'toy'""")
- print
- print "-- the return value of a function can also be a tuple. However,"
- print "-- make sure that the expressions in the target list is in the "
- print "-- same order as the columns of EMP."
- print
- print "CREATE FUNCTION new_emp() RETURNS EMP"
- print " AS 'SELECT \'None\'::text AS name,"
- print " 1000 AS salary,"
- print " 25 AS age,"
- print " \'none\'::varchar(16) AS dept'"
- print " LANGUAGE 'sql'"
- pgcnx.query("""CREATE FUNCTION new_emp() RETURNS EMP
- AS 'SELECT \\\'None\\\'::text AS name,
- 1000 AS salary,
- 25 AS age,
- \\\'none\\\'::varchar(16) AS dept'
- LANGUAGE 'sql'""")
- wait_key()
- print
- print "-- you can then project a column out of resulting the tuple by"
- print "-- using the \"function notation\" for projection columns. "
- print "-- (ie. bar(foo) is equivalent to foo.bar) Note that we don't"
- print "-- support new_emp().name at this moment."
- print
- print "SELECT name(new_emp()) AS nobody"
- print pgcnx.query("SELECT name(new_emp()) AS nobody")
- print
- print "-- let's try one more function that returns tuples"
- print "CREATE FUNCTION high_pay() RETURNS setof EMP"
- print " AS 'SELECT * FROM EMP where salary > 1500'"
- print " LANGUAGE 'sql'"
- pgcnx.query("""CREATE FUNCTION high_pay() RETURNS setof EMP
- AS 'SELECT * FROM EMP where salary > 1500'
- LANGUAGE 'sql'""")
- print
- print "SELECT name(high_pay()) AS overpaid"
- print pgcnx.query("SELECT name(high_pay()) AS overpaid")
-
-# function with multiple SQL commands
-def mult_func(pgcnx):
- print "-----------------------------"
- print "-- Creating SQL Functions with multiple SQL statements"
- print "-- you can also create functions that do more than just a"
- print "-- SELECT."
- print "-----------------------------"
- print
- print "-- you may have noticed that Andy has a negative salary. We'll"
- print "-- create a function that removes employees with negative "
- print "-- salaries."
- print
- print "SELECT * FROM EMP"
- print pgcnx.query("SELECT * FROM EMP")
- print
- print "CREATE FUNCTION clean_EMP () RETURNS int4"
- print " AS 'DELETE FROM EMP WHERE EMP.salary <= 0"
- print " SELECT 1 AS ignore_this'"
- print " LANGUAGE 'sql'"
- pgcnx.query("CREATE FUNCTION clean_EMP () RETURNS int4 AS 'DELETE FROM EMP WHERE EMP.salary <= 0; SELECT 1 AS ignore_this' LANGUAGE 'sql'")
- print
- print "SELECT clean_EMP()"
- print pgcnx.query("SELECT clean_EMP()")
- print
- print "SELECT * FROM EMP"
- print pgcnx.query("SELECT * FROM EMP")
-
-# base cleanup
-def demo_cleanup(pgcnx):
- print "-- remove functions that were created in this file"
- print
- print "DROP FUNCTION clean_EMP()"
- print "DROP FUNCTION high_pay()"
- print "DROP FUNCTION new_emp()"
- print "DROP FUNCTION add_em(int4, int4)"
- print "DROP FUNCTION one()"
- print
- print "DROP TABLE EMP CASCADE"
- pgcnx.query("DROP FUNCTION clean_EMP()")
- pgcnx.query("DROP FUNCTION high_pay()")
- pgcnx.query("DROP FUNCTION new_emp()")
- pgcnx.query("DROP FUNCTION add_em(int4, int4)")
- pgcnx.query("DROP FUNCTION one()")
- pgcnx.query("DROP TABLE EMP CASCADE")
-
-# main demo function
-def demo(pgcnx):
- base_func(pgcnx)
- comp_func(pgcnx)
- mult_func(pgcnx)
- demo_cleanup(pgcnx)
+++ /dev/null
-# syscat.py - parses some system catalogs
-# inspired from the PostgreSQL tutorial
-# adapted to Python 1995 by Pascal ANDRE
-
-print """
-__________________________________________________________________
-MODULE SYSCAT.PY : PARSES SOME POSTGRESQL SYSTEM CATALOGS
-
-This module is designed for being imported from python prompt
-
-In order to run the samples included here, first create a connection
-using : cnx = syscat.DB(...)
-
-The "..." should be replaced with whatever arguments you need to open an
-existing database. Usually all you need is the name of the database and,
-in fact, if it is the same as your login name, you can leave it empty.
-
-then start the demo with: syscat.demo(cnx)
-
-Some results may be empty, depending on your base status."
-
-__________________________________________________________________
-"""
-
-from pg import DB
-import sys
-
-# waits for a key
-def wait_key():
- print "Press <enter>"
- sys.stdin.read(1)
-
-# lists all simple indices
-def list_simple_ind(pgcnx):
- result = pgcnx.query("""SELECT bc.relname AS class_name,
- ic.relname AS index_name, a.attname
- FROM pg_class bc, pg_class ic, pg_index i, pg_attribute a
- WHERE i.indrelid = bc.oid AND i.indexrelid = bc.oid
- AND i.indkey[0] = a.attnum AND i.indnatts = 1
- AND a.attrelid = bc.oid AND a.attisdropped = 'f'
- ORDER BY class_name, index_name, attname""")
- return result
-
-# list all user defined attributes and their type in user-defined classes
-def list_all_attr(pgcnx):
- result = pgcnx.query("""SELECT c.relname, a.attname, t.typname
- FROM pg_class c, pg_attribute a, pg_type t
- WHERE c.relkind = 'r' and c.relname !~ '^pg_'
- AND c.relname !~ '^Inv' and a.attnum > 0
- AND a.attrelid = c.oid and a.atttypid = t.oid
- AND a.attisdropped = 'f'
- ORDER BY relname, attname""")
- return result
-
-# list all user defined base type
-def list_user_base_type(pgcnx):
- result = pgcnx.query("""SELECT u.usename, t.typname
- FROM pg_type t, pg_user u
- WHERE u.usesysid = int2in(int4out(t.typowner))
- AND t.typrelid = '0'::oid and t.typelem = '0'::oid
- AND u.usename <> 'postgres' order by usename, typname""")
- return result
-
-# list all right-unary operators
-def list_right_unary_operator(pgcnx):
- result = pgcnx.query("""SELECT o.oprname AS right_unary,
- lt.typname AS operand, result.typname AS return_type
- FROM pg_operator o, pg_type lt, pg_type result
- WHERE o.oprkind='r' and o.oprleft = lt.oid
- AND o.oprresult = result.oid
- ORDER BY operand""")
- return result
-
-# list all left-unary operators
-def list_left_unary_operator(pgcnx):
- result = pgcnx.query("""SELECT o.oprname AS left_unary,
- rt.typname AS operand, result.typname AS return_type
- FROM pg_operator o, pg_type rt, pg_type result
- WHERE o.oprkind='l' AND o.oprright = rt.oid
- AND o.oprresult = result.oid
- ORDER BY operand""")
- return result
-
-# list all binary operators
-def list_binary_operator(pgcnx):
- result = pgcnx.query("""SELECT o.oprname AS binary_op,
- rt.typname AS right_opr, lt.typname AS left_opr,
- result.typname AS return_type
- FROM pg_operator o, pg_type rt, pg_type lt, pg_type result
- WHERE o.oprkind = 'b' AND o.oprright = rt.oid
- AND o.oprleft = lt.oid AND o.oprresult = result.oid""")
- return result
-
-# returns the name, args and return type from all function of lang l
-def list_lang_func(pgcnx, l):
- result = pgcnx.query("""SELECT p.proname, p.pronargs, t.typname
- FROM pg_proc p, pg_language l, pg_type t
- WHERE p.prolang = l.oid AND p.prorettype = t.oid
- AND l.lanname = '%s'
- ORDER BY proname""" % l)
- return result
-
-# lists all the aggregate functions and the type to which they can be applied
-def list_agg_func(pgcnx):
- result = pgcnx.query("""SELECT p.proname, t.typname
- FROM pg_aggregate a, pg_proc p, pg_type t
- WHERE a.aggfnoid = p.oid
- and p.proargtypes[0] = t.oid
- ORDER BY proname, typname""")
- return result
-
-# lists all the operator classes that can be used with each access method as
-# well as the operators that can be used with the respective operator classes
-def list_op_class(pgcnx):
- result = pgcnx.query("""SELECT am.amname, opc.opcname, opr.oprname
- FROM pg_am am, pg_amop amop, pg_opclass opc, pg_operator opr
- WHERE amop.amopid = am.oid and amop.amopclaid = opc.oid
- AND amop.amopopr = opr.oid order by amname, opcname, oprname""")
- return result
-
-# demo function - runs all examples
-def demo(pgcnx):
- import sys, os
- save_stdout = sys.stdout
- sys.stdout = os.popen("more", "w")
- print "Listing simple indices ..."
- print list_simple_ind(pgcnx)
- print "Listing all attributes ..."
- print list_all_attr(pgcnx)
- print "Listing all user-defined base types ..."
- print list_user_base_type(pgcnx)
- print "Listing all left-unary operators defined ..."
- print list_left_unary_operator(pgcnx)
- print "Listing all right-unary operators defined ..."
- print list_right_unary_operator(pgcnx)
- print "Listing all binary operators ..."
- print list_binary_operator(pgcnx)
- print "Listing C external function linked ..."
- print list_lang_func(pgcnx, 'C')
- print "Listing C internal functions ..."
- print list_lang_func(pgcnx, 'internal')
- print "Listing SQL functions defined ..."
- print list_lang_func(pgcnx, 'sql')
- print "Listing 'aggregate functions' ..."
- print list_agg_func(pgcnx)
- print "Listing 'operator classes' ..."
- print list_op_class(pgcnx)
- del sys.stdout
- sys.stdout = save_stdout
projects / postgresql / commitdiff