drop_tsparser.sgml

postgresql8.3.4源码,开源数据库

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$PostgreSQL: pgsql/doc/src/sgml/ref/drop_tsparser.sgml,v 1.1 2007/08/21 21:08:47 tgl Exp $
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<refentry id="SQL-DROPTSPARSER">
 <refmeta>
  <refentrytitle id="SQL-DROPTSPARSER-TITLE">DROP TEXT SEARCH PARSER</refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>DROP TEXT SEARCH PARSER</refname>
  <refpurpose>remove a text search parser</refpurpose>
 </refnamediv>
  
 <indexterm zone="sql-droptsparser">
  <primary>DROP TEXT SEARCH PARSER</primary>
 </indexterm>

 <refsynopsisdiv>
<synopsis>
DROP TEXT SEARCH PARSER [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> [ CASCADE | RESTRICT ]
</synopsis>
 </refsynopsisdiv>

 <refsect1>
  <title>Description</title>

  <para>
   <command>DROP TEXT SEARCH PARSER</command> drops an existing text search
   parser.  You must be a superuser to use this command.
  </para>
 </refsect1>
  
 <refsect1>
  <title>Parameters</title>

  <variablelist>

   <varlistentry>
    <term><literal>IF EXISTS</literal></term>
    <listitem>
     <para>
      Do not throw an error if the text search parser does not exist.
      A notice is issued in this case.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">name</replaceable></term>
    <listitem>
     <para>
      The name (optionally schema-qualified) of an existing text search parser.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>CASCADE</literal></term>
    <listitem>
     <para>
      Automatically drop objects that depend on the text search parser.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>RESTRICT</literal></term>
    <listitem>
     <para>
      Refuse to drop the text search parser if any objects depend on it.
      This is the default.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   Remove the text search parser <literal>my_parser</literal>:

<programlisting>
DROP TEXT SEARCH PARSER my_parser;
</programlisting>

   This command will not succeed if there are any existing text search
   configurations that use the parser.  Add <literal>CASCADE</> to
   drop such configurations along with the parser.
  </para>
 </refsect1>
 
 <refsect1>
  <title>Compatibility</title>

  <para>
   There is no <command>DROP TEXT SEARCH PARSER</command> statement in the
   SQL standard.
  </para>
 </refsect1>

 <refsect1>
  <title>See Also</title>

  <simplelist type="inline">
   <member><xref linkend="sql-altertsparser" endterm="sql-altertsparser-title"></member>
   <member><xref linkend="sql-createtsparser" endterm="sql-createtsparser-title"></member>
  </simplelist>
 </refsect1>

</refentry>