granicus.if.org Git - postgresql/blob - doc/src/sgml/ref/create_database.sgml

   1 <REFENTRY ID="SQL-CREATEDATABASE-1">
   2  <REFMETA>
   3   <REFENTRYTITLE>
   4    CREATE DATABASE
   5   </REFENTRYTITLE>
   6   <REFMISCINFO>SQL - Language Statements</REFMISCINFO>
   7  </REFMETA>
   8  <REFNAMEDIV>
   9   <REFNAME>
  10    CREATE DATABASE
  11   </REFNAME>
  12   <REFPURPOSE>
  13    Creates a new database
  14   </REFPURPOSE>
  15  <REFSYNOPSISDIV>
  16   <REFSYNOPSISDIVINFO>
  17    <DATE>1998-04-15</DATE>
  18   </REFSYNOPSISDIVINFO>
  19   <SYNOPSIS>
  20    CREATE DATABASE <REPLACEABLE CLASS="PARAMETER">name</REPLACEABLE> [WITH LOCATION = '<replaceable class="parameter">dbpath</replaceable>']
  21   </SYNOPSIS>
  22
  23   <REFSECT2 ID="R2-SQL-CREATEDATABASE-1">
  24    <REFSECT2INFO>
  25     <DATE>1998-04-15</DATE>
  26    </REFSECT2INFO>
  27    <TITLE>
  28     Inputs
  29    </TITLE>
  30    <PARA>
  31    </PARA>
  32    <VARIABLELIST>
  33     <VARLISTENTRY>
  34      <TERM>
  35      </TERM>
  36      <LISTITEM>
  37       <PARA>
  38        <VARIABLELIST>
  39         <VARLISTENTRY>
  40          <TERM>
  41           <replaceable class="parameter">name</replaceable>
  42          </TERM>
  43          <LISTITEM>
  44           <PARA>
  45            The name of a database to create.
  46           </PARA>
  47          </LISTITEM>
  48         </VARLISTENTRY>
  49         <VARLISTENTRY>
  50          <TERM>
  51           <replaceable class="parameter">dbpath</replaceable>
  52          </TERM>
  53          <LISTITEM>
  54           <PARA>
  55            An alternate location can be specified as either an
  56            environment variable known to the backend server
  57            (e.g. '<envar>PGDATA2</envar>') or as an absolute path name
  58            (e.g. '<filename>/usr/local/pgsql/data</filename>').
  59            In either case, the location must be pre-configured
  60            by <command>initlocation</command>.
  61           </PARA>
  62          </LISTITEM>
  63         </VARLISTENTRY>
  64        </VARIABLELIST>
  65      </LISTITEM>
  66     </VARLISTENTRY>
  67    </VARIABLELIST>
  68   </REFSECT2>
  69
  70   <REFSECT2 ID="R2-SQL-CREATEDATABASE-2">
  71    <REFSECT2INFO>
  72     <DATE>1998-04-15</DATE>
  73    </REFSECT2INFO>
  74    <TITLE>
  75     Outputs
  76    </TITLE>
  77    <PARA>
  78    </PARA>
  79    <VARIABLELIST>
  80     <VARLISTENTRY>
  81      <TERM>
  82      </TERM>
  83      <LISTITEM>
  84       <PARA>
  85        <VARIABLELIST>
  86         <VARLISTENTRY>
  87          <TERM>
  88           <ReturnValue>CREATEDB</ReturnValue>
  89          </TERM>
  90          <LISTITEM>
  91           <PARA>
  92           Message returned if the command completes successfully.
  93           </PARA>
  94          </LISTITEM>
  95         </VARLISTENTRY>
  96         <VARLISTENTRY>
  97          <TERM>
  98           <ReturnValue>WARN:  createdb: database "<replaceable class="parameter">name</replaceable>" already exists.</ReturnValue>
  99          </TERM>
 100          <LISTITEM>
 101           <PARA>
 102            This occurs if <replaceable class="parameter">database</replaceable> specified already exists.
 103           </PARA>
 104          </LISTITEM>
 105         </VARLISTENTRY>
 106         <VARLISTENTRY>
 107          <TERM>
 108           <ReturnValue>ERROR:  Unable to create database directory <replaceable class="parameter">directory</replaceable>
 109 </ReturnValue>
 110          </TERM>
 111          <LISTITEM>
 112           <PARA>
 113 There was a problem with creating the required directory; this operation will
 114            need permissions for the <literal>postgres</literal> user on the specified location.
 115           </PARA>
 116          </LISTITEM>
 117         </VARLISTENTRY>
 118        </variablelist>
 119      </LISTITEM>
 120     </VARLISTENTRY>
 121    </VARIABLELIST>
 122   </REFSECT2>
 123  </REFSYNOPSISDIV>
 124
 125  <REFSECT1 ID="R1-SQL-CREATEDATABASE-1">
 126   <REFSECT1INFO>
 127    <DATE>1998-04-15</DATE>
 128   </REFSECT1INFO>
 129   <TITLE>
 130    Description
 131   </TITLE>
 132   <PARA>
 133    CREATE DATABASE creates a new PostgreSQL database.
 134    The creator becomes the administrator of the new database.
 135   </PARA>
 136
 137   <REFSECT2 ID="R2-SQL-CREATEDATABASE-3">
 138    <REFSECT2INFO>
 139     <DATE>1998-04-15</DATE>
 140    </REFSECT2INFO>
 141    <TITLE>
 142     Notes
 143    </TITLE>
 144    <PARA>
 145     CREATE DATABASE statement is a PostgreSQL language extension.
 146    </PARA>
 147    <para>
 148     Refer to DROP DATABASE statement to remove a database.
 149    </para>
 150   </REFSECT2>
 151
 152  <REFSECT1 ID="R1-SQL-CREATEDATABASE-2">
 153   <TITLE>
 154    Usage
 155   </TITLE>
 156   <PARA>
 157    To create a new database:
 158   </PARA>
 159   <ProgramListing>
 160    CREATE DATABASE lusiadas;
 161   </ProgramListing>
 162   <PARA>
 163    To create a new database in <filename>~/private_db</filename>:
 164   </PARA>
 165   <ProgramListing>
 166    $ mkdir private_db
 167    $ initlocation ~/private_db
 168    <computeroutput>Creating Postgres database system directory /home/olly/private_db/base</computeroutput>
 169
 170    $ chmod a+rx private_db
 171    $ chmod a+rwx private_db/base
 172    $ psql
 173    <computeroutput>Welcome to the POSTGRESQL interactive sql monitor:
 174      Please read the file COPYRIGHT for copyright terms of POSTGRESQL
 175
 176       type \? for help on slash commands
 177       type \q to quit
 178       type \g or terminate with semicolon to execute query
 179     You are currently connected to the database: template1
 180
 181     template1=></computeroutput> <userinput>create database elsewhere with location = '/home/olly/private_db';</userinput>
 182     <computeroutput>CREATEDB</computeroutput>
 183   </ProgramListing>
 184  </REFSECT1>
 185
 186  <REFSECT1 ID="R1-SQL-CREATEDATABASE-3">
 187   <TITLE>
 188    Bugs
 189   </TITLE>
 190   <PARA>
 191    Where an ordinary user cannot change the ownership of files to other users
 192    (which is correct from a security point of view), there is no easy way
 193    to give the postgres backend access to files in a  database at a
 194    non-standard location without
 195    giving similar access to all users.  The situation shown in the usage
 196    example makes <filename>/home/olly/private_db</filename> world-accessible.
 197   </PARA>
 198   <para>
 199    If, on the other hand, the user gets the system administrator to give
 200    file ownership to the <literal>postgres</literal> superuser and restrict access, he will
 201    then be unable to delete the <filename><replaceable>directory</replaceable>/base</filename> directory.
 202   </para>
 203   <comment>
 204    initlocation does not create a PG_VERSION file in the specified location.
 205    How will PostgreSQL handle the situation if it is upgraded to an
 206    incompatible database version?
 207   </comment>
 208  </refsect1>
 209
 210  <REFSECT1 ID="R1-SQL-CREATEDATABASE-4">
 211   <TITLE>
 212    Compatibility
 213   </TITLE>
 214   <PARA>
 215   </PARA>
 216
 217   <REFSECT2 ID="R2-SQL-CREATEDATABASE-4">
 218    <REFSECT2INFO>
 219     <DATE>1998-04-15</DATE>
 220    </REFSECT2INFO>
 221    <TITLE>
 222     SQL92
 223    </TITLE>
 224    <PARA>
 225     There is no <command>CREATE DATABASE</command> statement on SQL92.
 226    </PARA>
 227    <para>
 228     The equivalent command in standard SQL is <command>CREATE SCHEMA</command>.
 229    </para>
 230   </refsect2>
 231  </refsect1>
 232 </REFENTRY>
 233
 234
 235 <!-- Keep this comment at the end of the file
 236 Local variables:
 237 mode: sgml
 238 sgml-omittag:t
 239 sgml-shorttag:t
 240 sgml-minimize-attributes:nil
 241 sgml-always-quote-attributes:t
 242 sgml-indent-step:1
 243 sgml-indent-data:t
 244 sgml-parent-document:nil
 245 sgml-default-dtd-file:"../reference.ced"
 246 sgml-exposed-tags:nil
 247 sgml-local-catalogs:"/usr/lib/sgml/catalog"
 248 sgml-local-ecat-files:nil
 249 End:
 250 -->