postgresql/doc/src/sgml/ref/drop_operator.sgml

<REFENTRY ID="SQL-DROPOPERATOR">
 <REFMETA>
  <REFENTRYTITLE>
   DROP OPERATOR
  </REFENTRYTITLE>
  <REFMISCINFO>SQL - Language Statements</REFMISCINFO>
 </REFMETA>
 <REFNAMEDIV>
  <REFNAME>
   DROP OPERATOR
  </REFNAME>
  <REFPURPOSE>
   Removes an operator from the database
  </REFPURPOSE>
  
  
 <REFSYNOPSISDIV>
  <REFSYNOPSISDIVINFO>
   <DATE>1998-04-15</DATE>
  </REFSYNOPSISDIVINFO>
  <SYNOPSIS>
   DROP OPERATOR <REPLACEABLE CLASS="PARAMETER">id</REPLACEABLE> ( <REPLACEABLE CLASS="PARAMETER">type</REPLACEABLE> | NONE [,...] );
  </SYNOPSIS>
  
  <REFSECT2 ID="R2-SQL-DROPOPERATOR-1">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Inputs
   </TITLE>
   <PARA>
   </PARA>
   <VARIABLELIST>
    <VARLISTENTRY>
     <TERM>
     </TERM>
     <LISTITEM>
      <PARA>
       <VARIABLELIST>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue><replaceable class="parameter">id</replaceable></ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          The identifier of an existing operator.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue><replaceable class="parameter">type</replaceable></ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          The type of function parameters.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
       </variablelist>
     </LISTITEM>
    </VARLISTENTRY>
   </VARIABLELIST>
  </REFSECT2>
  
  <REFSECT2 ID="R2-SQL-DROPOPERATOR-2">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Outputs
   </TITLE>
   <PARA>
   </PARA>
   <VARIABLELIST>
    <VARLISTENTRY>
     <TERM>
     </TERM>
     <LISTITEM>
      <PARA>
       <VARIABLELIST>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue>DROP</ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
	   The message returned if the command is successful.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue>ERROR: RemoveOperator: ... does not exist</ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          This message occurs if the operator specified doesn't exist.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
       </variablelist>
     </LISTITEM>
    </VARLISTENTRY>
   </VARIABLELIST>
  </REFSECT2>
 </REFSYNOPSISDIV>
 
 <REFSECT1 ID="R1-SQL-DROPOPERATOR-1">
  <REFSECT1INFO>
   <DATE>1998-04-15</DATE>
  </REFSECT1INFO>
  <TITLE>
   Description
  </TITLE>
  <PARA>
   The DROP OPERATOR statement drops an existing operator from the
   database.
   To execute this command you must be the owner of the operator.
  </PARA>
  <PARA>
   The left or right type of a left or right unary
   operator, respectively, may be specified as NONE.
  </PARA>
  
  <REFSECT2 ID="R2-SQL-DROPOPERATOR-3">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Notes
   </TITLE>
   <PARA>
    The <command>DROP OPERATOR</command> statement is a PostgreSQL
    language extension.
   </PARA>
   <PARA>
    Refer to the <command>CREATE OPERATOR</command> statement for
    information on how to create operators.
   </PARA>
   <PARA>
    It is the user's responsibility to remove any access methods,
    operator classes, and so on, that rely on the deleted operator.
   </PARA>
  </REFSECT2>
  
 <REFSECT1 ID="R1-SQL-DROPOPERATOR-2">
  <TITLE>
   Usage
  </TITLE>
  <PARA>
   Remove power operator <literal>a^n</literal> for <literal>int4</literal>:
  </PARA>
  <ProgramListing>
   DROP OPERATOR ^ (int4, int4);
  </ProgramListing>
  <PARA>
   Remove left unary operator <literal>!a</literal> for booleans:
  </PARA>
  <ProgramListing>
   DROP OPERATOR ! (none, bool);
  </ProgramListing>
  <PARA>
   Remove right unary factorial operator <literal>a!</literal> for
   <literal>int4</literal>:
  </PARA>
  <ProgramListing>
   DROP OPERATOR ! (int4, none);
  </ProgramListing>
 </REFSECT1>
 
 <REFSECT1 ID="R1-SQL-DROPOPERATOR-3">
  <TITLE>
   Compatibility
  </TITLE>
  <PARA>
  </PARA>
  
  <REFSECT2 ID="R2-SQL-DROPOPERATOR-4">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    SQL92
   </TITLE>
   <PARA>
   There is no DROP OPERATOR statement in SQL92.
   </PARA>
  </refsect2>
 </refsect1>
</REFENTRY>

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