drop_language.sgml

关系型数据库 Postgresql 6.5.2

<refentry id="SQL-DROPLANGUAGE">
 <refmeta>
  <refentrytitle>
   DROP LANGUAGE
  </refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>
 <refnamediv>
  <refname>
   DROP LANGUAGE
  </refname>
  <refpurpose>
   Removes a user-defined procedural language
  </refpurpose>
 </refnamediv>
 <refsynopsisdiv>
  <refsynopsisdivinfo>
   <date>1998-04-15</date>
  </refsynopsisdivinfo>
  <synopsis>
DROP PROCEDURAL LANGUAGE '<replaceable class="PARAMETER">name</replaceable>'
  </synopsis>
  
  <refsect2 id="R2-SQL-DROPLANGUAGE-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 procedural language.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>
  
  <refsect2 id="R2-SQL-DROPLANGUAGE-2">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Outputs
   </title>
   <para>
    <variablelist>
     <varlistentry>
      <term><computeroutput>
DROP
       </computeroutput></term>
      <listitem>
       <para>
	This message is returned if the language is successfully dropped.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term><computeroutput>
ERROR: Language "<replaceable class="parameter">name</replaceable>" doesn't exist
       </computeroutput></term>
      <listitem>
       <para>
	This message occurs if a language called
	<replaceable class="parameter">name</replaceable> is
	not found in the database.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>
 </refsynopsisdiv>
 
 <refsect1 id="R1-SQL-DROPLANGUAGE-1">
  <refsect1info>
   <date>1998-04-15</date>
  </refsect1info>
  <title>
   Description
  </title>
  <para>
   <command>DROP PROCEDURAL LANGUAGE</command> will remove the definition
   of the previously registered procedural language called
   <replaceable class="parameter">name</replaceable>.
  </para>
  
  <refsect2 id="R2-SQL-DROPLANGUAGE-3">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Notes
   </title>
   <para>
    The <command>DROP PROCEDURAL LANGUAGE</command> statement is
    a <productname>Postgres</productname> language extension.
   </para>
   <para>
    Refer to <command>CREATE PROCEDURAL LANGUAGE</command>
    for information on how to create procedural languages.
   </para>
  </refsect2>
  
  <refsect2 id="R2-SQL-DROPLANGUAGE-4">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    Bugs
   </title>
   <para>
    No checks are made if functions or trigger procedures registered
    in this language still exist. To re-enable them without having
    to drop and recreate all the functions, the pg_proc's prolang
    attribute of the functions must be adjusted to the new object
    ID of the recreated pg_language entry for the PL.
   </para>
  </refsect2>
 </refsect1>
 
 <refsect1 id="R1-SQL-DROPLANGUAGE-2">
  <title>
   Usage
  </title>
  <para>
   This command removes the PL/Sample language:

   <programlisting>
DROP PROCEDURAL LANGUAGE 'plsample';
   </programlisting>
  </para>
 </refsect1>
 
 <refsect1 id="R1-SQL-DROPLANGUAGE-3">
  <title>
   Compatibility
  </title>
  <para>
  </para>
  
  <refsect2 id="R2-SQL-DROPLANGUAGE-5">
   <refsect2info>
    <date>1998-04-15</date>
   </refsect2info>
   <title>
    SQL92
   </title>
   <para>
    There is no <command>DROP PROCEDURAL LANGUAGE</command> in 
    <acronym>SQL92</acronym>.
   </para>
  </refsect2>
 </refsect1>
</refentry>

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