doc/src/sgml/ref/drop_opfamily.sgml

   1 <!--
   2 $PostgreSQL$
   3 PostgreSQL documentation
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   5
   6 <refentry id="SQL-DROPOPFAMILY">
   7  <refmeta>
   8   <refentrytitle id="SQL-DROPOPFAMILY-TITLE">DROP OPERATOR FAMILY</refentrytitle>
   9   <manvolnum>7</manvolnum>
  10   <refmiscinfo>SQL - Language Statements</refmiscinfo>
  11  </refmeta>
  12
  13  <refnamediv>
  14   <refname>DROP OPERATOR FAMILY</refname>
  15   <refpurpose>remove an operator family</refpurpose>
  16  </refnamediv>
  17
  18  <indexterm zone="sql-dropopfamily">
  19   <primary>DROP OPERATOR FAMILY</primary>
  20  </indexterm>
  21
  22  <refsynopsisdiv>
  23 <synopsis>
  24 DROP OPERATOR FAMILY [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> USING <replaceable class="PARAMETER">index_method</replaceable> [ CASCADE | RESTRICT ]
  25 </synopsis>
  26  </refsynopsisdiv>
  27
  28  <refsect1>
  29   <title>Description</title>
  30
  31   <para>
  32    <command>DROP OPERATOR FAMILY</command> drops an existing operator family.
  33    To execute this command you must be the owner of the operator family.
  34   </para>
  35
  36   <para>
  37    <command>DROP OPERATOR FAMILY</command> includes dropping any operator
  38    classes contained in the family, but it does not drop any of the operators
  39    or functions referenced by the family.  If there are any indexes depending
  40    on operator classes within the family, you will need to specify
  41    <literal>CASCADE</> for the drop to complete.
  42   </para>
  43  </refsect1>
  44
  45  <refsect1>
  46   <title>Parameters</title>
  47
  48   <variablelist>
  49
  50    <varlistentry>
  51     <term><literal>IF EXISTS</literal></term>
  52     <listitem>
  53      <para>
  54       Do not throw an error if the operator family does not exist.
  55       A notice is issued in this case.
  56      </para>
  57     </listitem>
  58    </varlistentry>
  59
  60    <varlistentry>
  61     <term><replaceable class="parameter">name</replaceable></term>
  62     <listitem>
  63      <para>
  64       The name (optionally schema-qualified) of an existing operator family.
  65      </para>
  66     </listitem>
  67    </varlistentry>
  68
  69    <varlistentry>
  70     <term><replaceable class="parameter">index_method</replaceable></term>
  71     <listitem>
  72      <para>
  73       The name of the index access method the operator family is for.
  74      </para>
  75     </listitem>
  76    </varlistentry>
  77
  78    <varlistentry>
  79     <term><literal>CASCADE</literal></term>
  80     <listitem>
  81      <para>
  82       Automatically drop objects that depend on the operator family.
  83      </para>
  84     </listitem>
  85    </varlistentry>
  86
  87    <varlistentry>
  88     <term><literal>RESTRICT</literal></term>
  89     <listitem>
  90      <para>
  91       Refuse to drop the operator family if any objects depend on it.
  92       This is the default.
  93      </para>
  94     </listitem>
  95    </varlistentry>
  96   </variablelist>
  97  </refsect1>
  98
  99  <refsect1>
 100   <title>Examples</title>
 101
 102   <para>
 103    Remove the B-tree operator family <literal>float_ops</literal>:
 104
 105 <programlisting>
 106 DROP OPERATOR FAMILY float_ops USING btree;
 107 </programlisting>
 108
 109    This command will not succeed if there are any existing indexes
 110    that use operator classes within the family.  Add <literal>CASCADE</> to
 111    drop such indexes along with the operator family.
 112   </para>
 113  </refsect1>
 114
 115  <refsect1>
 116   <title>Compatibility</title>
 117
 118   <para>
 119    There is no <command>DROP OPERATOR FAMILY</command> statement in the
 120    SQL standard.
 121   </para>
 122  </refsect1>
 123
 124  <refsect1>
 125   <title>See Also</title>
 126
 127   <simplelist type="inline">
 128    <member><xref linkend="sql-alteropfamily" endterm="sql-alteropfamily-title"></member>
 129    <member><xref linkend="sql-createopfamily" endterm="sql-createopfamily-title"></member>
 130    <member><xref linkend="sql-alteropclass" endterm="sql-alteropclass-title"></member>
 131    <member><xref linkend="sql-createopclass" endterm="sql-createopclass-title"></member>
 132    <member><xref linkend="sql-dropopclass" endterm="sql-dropopclass-title"></member>
 133   </simplelist>
 134  </refsect1>
 135
 136 </refentry>