-<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.530 2007/10/20 20:19:06 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.531 2007/10/20 23:41:23 momjian Exp $ -->
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Typical markup:
<listitem>
<para>
- Support for the SQL/XML standard, including new operators and
- an <type>XML</type> data type
+ Support the SQL/XML standard, including new operators and an
+ <type>XML</type> data type
</para>
</listitem>
<listitem>
<para>
- Universally Unique Identifier (<type>UUID</>) data type
+ Add Universally Unique Identifier (<type>UUID</>) data type
</para>
</listitem>
<listitem>
<para>
- Arrays of composite types
+ Support arrays of composite types
</para>
</listitem>
<listitem>
<para>
- Control over whether <literal>NULL</>s sort first or last
+ Add control over whether <literal>NULL</>s sort first or last
</para>
</listitem>
<listitem>
<para>
- Updatable cursors
+ Support updatable cursors
</para>
</listitem>
<listitem>
<para>
- Multiple autovacuum worker processes, and other autovacuum improvements
+ Support multiple concurrent autovacuum processes, and other
+ autovacuum improvements
</para>
</listitem>
<listitem>
<para>
- The backend database server can now be compiled with
+ Allow the backend database server to be compiled with
<productname>Microsoft Visual C++</>
</para>
</listitem>
<listitem>
<para>
- Asynchronous commit allows transactions to be committed but on-disk
- changes to be delayed
+ Asynchronous commit delays writes to WAL for committed transactions
</para>
</listitem>
<listitem>
<para>
- Heap-Only Tuples (<acronym>HOT</>) accelerate <command>UPDATE</>
- space reuse
+ Heap-Only Tuples (<acronym>HOT</>) accelerate space reuse for
+ <command>UPDATE</>s
</para>
</listitem>
<listitem>
<para>
- Reduction of per-field and per-row storage requirements
+ Reduce per-field and per-row storage requirements
</para>
</listitem>
<listitem>
<para>
- The array name for a base data type is no longer required to
- be the data type name with an underscore prefix
+ The array name for a base data type is no longer always the data
+ type name with an underscore prefix
</para>
<para>
<listitem>
<para>
- Commands that are disallowed in transaction blocks are now also
- disallowed in multiple-statement query strings (Tom)
+ Commands rejected in transaction blocks are now also rejected in
+ multiple-statement query strings (Tom)
</para>
<para>
<listitem>
<para>
- More checks for invalidly-encoded data (Andrew)
+ Add more checks for invalidly-encoded data (Andrew)
</para>
<para>
<listitem>
<para>
- Ensure that <function>chr()</function> cannot create invalidly
- encoded values (Andrew)
+ Ensure that <function>chr()</function> cannot create
+ invalidly-encoded values (Andrew)
</para>
<para>
- In UTF8-encoded databases the argument is processed as a Unicode
- code point. In other multi-byte encodings the argument must
- designate a 7-bit ASCII character, or an error is raised. Zero
- also causes an error. <function>ascii()</function> has been
- adjusted as well to match this behavior.
-
- </para>
+ In UTF8-encoded databases the argument is now processed as a Unicode
+ code point. In other multi-byte encodings the argument must designate
+ a 7-bit ASCII character, or an error is raised. Zero also causes an
+ error. <function>ascii()</function> has been adjusted as well to
+ match this behavior.
+ </para>
</listitem>
<listitem>
The two argument form of <function>convert()</function> has been
removed. The three argument form now takes a <type>BYTEA</type>
first argument and returns a <type>BYTEA</type>. To cover this
- loss three new functions are introduced:
+ loss three new functions were added:
</para>
<itemizedlist>
</para>
<para>
- For example, <function>pg_database_size()</function> now
- requires <literal>CONNECT</> permission, which is granted to
- everyone by default. <function>pg_tablespace_size()</function>
- requires <literal>CREATE</> permission in the tablespace, or the
- tablespace is the default tablespace for the database.
+ For example, <function>pg_database_size()</function> now requires
+ <literal>CONNECT</> permission, which is granted to everyone by
+ default. <function>pg_tablespace_size()</function> requires
+ <literal>CREATE</> permission in the tablespace, or is allowed if
+ the tablespace is the default tablespace for the database.
</para>
</listitem>
<listitem>
<para>
- New C macros for handling variable-length data values (Greg
+ Add C macros for handling variable-length data values (Greg
Stark, Tom)
</para>
<listitem>
<para>
- Asynchronous commit allows transactions to be committed but on-disk
- changes to be delayed (Simon)
+ Asynchronous commit delays writes to WAL for committed transactions
+ (Simon)
</para>
<para>
- This feature dramatically increases performance for data
- modification queries. The disadvantage is that because on-disk
- changes are delayed, if the operating system crashes before data
- is written to the disk, committed data will be lost. This is
- useful only for applications that can accept some data loss.
- Unlike <varname>fsync</varname>, asynchronous commit does not
- risk database corruption; the worst case is that after an
- operating system crash the last few reportedly-committed
- transactions will be missing.
+ This feature dramatically increases performance for data-modifying
+ queries. The disadvantage is that because on-disk changes are
+ delayed, if the operating system crashes before data is written to
+ the disk, committed data will be lost. This is useful only for
+ applications that can accept some data loss. Unlike
+ <varname>fsync</varname>, asynchronous commit does not risk database
+ corruption; the worst case is that after an operating system crash
+ the last few reportedly-committed transactions will be missing.
+ This feature is enabled turning <varname>synchronous_commit</>
+ <literal>off</> and setting <varname>wal_writer_delay</>.
</para>
</listitem>
<listitem>
<para>
- Heap-Only Tuples (<acronym>HOT</>) accelerate <command>UPDATE</>
- space reuse (Pavan Deolasee, with ideas from many others)
+ Heap-Only Tuples (<acronym>HOT</>) accelerate space reuse for
+ <command>UPDATE</>s (Pavan Deolasee, with ideas from many others)
</para>
<para>
<listitem>
<para>
- Reduction of per-field and per-row storage requirements (Greg
- Stark)
+ Reduce per-field and per-row storage requirements (Greg Stark)
</para>
<para>
Unless WAL archiving is enabled, it is possible to just
<function>fsync()</> the table at the end of the command,
increasing performance. Additional WAL efficiencies were also
- added.
+ made.
</para>
</listitem>
<para>
This is accomplished by starting the new sequential scan in the
middle of the table (where the other sequential scan is already
- in-progress) and wrapping around to the beginning to finish.
- This may affect the order in which rows are returned in a
- non-<literal>ORDER BY</> query.
+ in-progress) and wrapping around to the beginning to finish. This
+ may affect the order of returned rows in a non-<literal>ORDER BY</>
+ query.
</para>
</listitem>
<listitem>
<para>
- Add support for GSSAPI authentication (Henry Hotz, Magnus)
+ Support GSSAPI authentication (Henry Hotz, Magnus)
</para>
</listitem>
<listitem>
<para>
- Arrange to put TOAST tables belonging to temporary tables into
- special schemas named
+ Place temporary table TOAST tables in a special schemas named
<literal>pg_toast_temp_<replaceable>nnn</></literal> (Tom)
</para>
<listitem>
<para>
- Text search capability is now in core Postgres (Teodor, Oleg)
+ Full text search now fully integrated into the core database
+ system (Teodor, Oleg)
</para>
<para>
<listitem>
<para>
- Control over whether <literal>NULL</>s sort first or last (Teodor, Tom)
+ Add control over whether <literal>NULL</>s sort first or last (Teodor, Tom)
</para>
<para>
<listitem>
<para>
- Updatable cursors using <literal>UPDATE/DELETE WHERE CURRENT
- OF</> (Arul Shaji, Tom)
+ Support updatable cursors (Arul Shaji, Tom)
</para>
<para>
<listitem>
<para>
- Allow <command>ALTER VIEW ... RENAME TO</command> and <command>ALTER
+ Add <command>ALTER VIEW ... RENAME TO</command> and <command>ALTER
SEQUENCE ... RENAME TO</command> (David Fetter, Neil)
</para>
<listitem>
<para>
- Support for the SQL/XML standard, including new operators and an
- <type>XML</type> data type (Nikolay Samokhvalov, Peter)
+ Support the SQL/XML standard, including new operators and an
+ <type>XML</type> data type (Nikolay Samokhvalov, Peter)
</para>
</listitem>
<listitem>
<para>
- Universally Unique Identifier (<type>UUID</>) data type (Gevik
+ Add Universally Unique Identifier (<type>UUID</>) data type (Gevik
Babakhani, Neil)
</para>
<listitem>
<para>
- The backend database server can now be compiled with
+ Allow the backend database server to be compiled with
<productname>Microsoft Visual C++</> (Magnus and others)
</para>
<listitem>
<para>
- Native shared memory implementation for Windows (Magnus)
+ Add native shared memory implementation for Windows (Magnus)
</para>
</listitem>
projects / postgresql / commitdiff