数据库系统

开发平台：
Unix_Linux

drop_database.sgml：源码内容
							<refentry id="SQL-DROPDATABASE">
 <refmeta>
  <refentrytitle>
   DROP DATABASE
  </refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>
 <refnamediv>
  <refname>
   DROP DATABASE
  </refname>
  <refpurpose>
   Destroys an existing database
  </refpurpose>
 </refnamediv>
 <refsynopsisdiv>
  <refsynopsisdivinfo>
   <date>1998-04-15</date>
  </refsynopsisdivinfo>
  <synopsis>
DROP DATABASE <replaceable class="PARAMETER">name</replaceable>
  </synopsis>
  <refsect2 id="R2-SQL-DROPDATABASE-1">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Inputs
   </title>
   <para>
    <variablelist>
     <varlistentry>
      <term><replaceable class="PARAMETER">name</replaceable></term>
      <listitem>
       <para>
	The name of an existing database to remove.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>
  <refsect2 id="R2-SQL-DROPDATABASE-2">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Outputs
   </title>
   <para>
    <variablelist>
     <varlistentry>
      <term><computeroutput>
DESTROYDB
       </computeroutput></term>
      <listitem>
       <para>
	This message is returned if the command is successful.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term><computeroutput>
WARN: destroydb: database "<replaceable class="parameter">name</replaceable>" does not exist.
       </computeroutput></term>
      <listitem>
       <para>
	This message occurs if the specified database does not exist.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term><computeroutput>
	ERROR:  destroydb cannot be executed on an open database
       </computeroutput></term>
      <listitem>
       <para>
	This message occurs if the specified database does not exist.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>
 </refsynopsisdiv>
 
 <refsect1 id="R1-SQL-DROPDATABASE-1">
  <refsect1info>
   <date>1998-04-15</date>
  </refsect1info>
  <title>
   Description
  </title>
  <para>
   <command>DROP DATABASE</command> removes the catalog entries for an existing
   database and deletes the directory containing the data.
   It can only be executed by the database administrator
   (See the <command>CREATE DATABASE</command> command for details).
  </para>
  <refsect2 id="R2-SQL-DROPDATABASE-3">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Notes
   </title>
   <para>
    <command>DROP DATABASE</command> statement is a <productname>Postgres</productname>
    language extension.
    <tip>
     <para>
      This query cannot be executed while connected to the target
      database. It is usually preferable to use the
      <command>destroydb</command> script instead.
     </para>
    </tip>
   </para>
   <para>
    Refer to the <command>CREATE DATABASE</command> statement for
    information on how to create a database.
   </para>
  </refsect2>
 </refsect1>
 <refsect1 id="R1-SQL-DROPDATABASE-3">
  <title>
   Compatibility
  </title>
  <para>
  </para>
  <refsect2 id="R2-SQL-DROPDATABASE-4">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    SQL92
   </title>
   <para>
    There is no <command>DROP DATABASE</command> in <acronym>SQL92</acronym>.
   </para>
  </refsect2>
 </refsect1>
</refentry>
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