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    <command>CREATE DATABASE</command> creates a new Postgres 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     <command>CREATE DATABASE</command> statement is a Postgres language extension.
 146    </PARA>
 147    <para>
 148     Refer to <command>DROP DATABASE</command> 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    <prompt>olly=></prompt></computeroutput> <userinput>create database lusiadas;</userinput>
 161   </ProgramListing>
 162   <PARA>
 163    To create a new database in an alternate area <filename>~/private_db</filename>:
 164   </PARA>
 165   <ProgramListing>
 166    <prompt>$</prompt> <userinput>mkdir private_db</userinput>
 167    <prompt>$</prompt> <userinput>initlocation ~/private_db</userinput>
 168    <computeroutput>Creating Postgres database system directory /home/olly/private_db/base</computeroutput>
 169
 170    <prompt>$</prompt> <userinput>psql olly</userinput>
 171    <computeroutput>Welcome to the POSTGRESQL interactive sql monitor:
 172      Please read the file COPYRIGHT for copyright terms of POSTGRESQL
 173
 174       type \? for help on slash commands
 175       type \q to quit
 176       type \g or terminate with semicolon to execute query
 177     You are currently connected to the database: template1
 178
 179     <prompt>olly=></prompt></computeroutput> <userinput>create database elsewhere with location = '/home/olly/private_db';</userinput>
 180     <computeroutput>CREATEDB</computeroutput>
 181   </ProgramListing>
 182  </REFSECT1>
 183
 184  <REFSECT1 ID="R1-SQL-CREATEDATABASE-3">
 185   <TITLE>
 186    Bugs
 187   </TITLE>
 188   <PARA>
 189    There are security and data integrity issues involved with using alternate database locations
 190    specified with absolute path names. See the Administrator's Guide for more information.
 191   </PARA>
 192 <!-- ------------------
 193 comment from Olly; response from Thomas...
 194   <comment>
 195    initlocation does not create a PG_VERSION file in the specified location.
 196    How will Postgres handle the situation if it is upgraded to an
 197    incompatible database version?
 198   </comment>
 199 Hmm. This isn't an issue since the upgrade would do a dump/reload from the main database area also.
 200 Not sure if the dump/reload would guarantee that the alternate data area gets refreshed though...
 201 -------------------- -->
 202  </refsect1>
 203
 204  <REFSECT1 ID="R1-SQL-CREATEDATABASE-4">
 205   <TITLE>
 206    Compatibility
 207   </TITLE>
 208   <PARA>
 209   </PARA>
 210
 211   <REFSECT2 ID="R2-SQL-CREATEDATABASE-4">
 212    <REFSECT2INFO>
 213     <DATE>1998-04-15</DATE>
 214    </REFSECT2INFO>
 215    <TITLE>
 216     SQL92
 217    </TITLE>
 218    <PARA>
 219     There is no <command>CREATE DATABASE</command> statement on SQL92.
 220    </PARA>
 221    <para>
 222     The equivalent command in standard SQL is <command>CREATE SCHEMA</command>.
 223    </para>
 224   </refsect2>
 225  </refsect1>
 226 </REFENTRY>
 227
 228
 229 <!-- Keep this comment at the end of the file
 230 Local variables:
 231 mode: sgml
 232 sgml-omittag:t
 233 sgml-shorttag:t
 234 sgml-minimize-attributes:nil
 235 sgml-always-quote-attributes:t
 236 sgml-indent-step:1
 237 sgml-indent-data:t
 238 sgml-parent-document:nil
 239 sgml-default-dtd-file:"../reference.ced"
 240 sgml-exposed-tags:nil
 241 sgml-local-catalogs:"/usr/lib/sgml/catalog"
 242 sgml-local-ecat-files:nil
 243 End:
 244 -->