doc/src/sgml/ref/drop_property_graph.sgml - master - githubmirror/postgres

doc/src/sgml/ref/drop_property_graph.sgml
111 строк3 KB
Peter Eisentraut
SQL Property Graph Queries (SQL/PGQ)
16 мар 2026, 12:14
16 мар 2026, 12:142f094e7
<!--
doc/src/sgml/ref/drop_property_graph.sgml
PostgreSQL documentation
-->

<refentry id="sql-drop-property-graph">
 <indexterm zone="sql-drop-property-graph">
  <primary>DROP PROPERTY GRAPH</primary>
 </indexterm>

 <refmeta>
  <refentrytitle>DROP PROPERTY GRAPH</refentrytitle>
  <manvolnum>7</manvolnum>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>DROP PROPERTY GRAPH</refname>
  <refpurpose>remove an SQL-property graph</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
<synopsis>
DROP PROPERTY GRAPH [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
 </refsynopsisdiv>

 <refsect1>
  <title>Description</title>

  <para>
   <command>DROP PROPERTY GRAPH</command> drops an existing property graph.
   To execute this command you must be the owner of the property graph.
  </para>
 </refsect1>

 <refsect1>
  <title>Parameters</title>

  <variablelist>
   <varlistentry>
    <term><literal>IF EXISTS</literal></term>
    <listitem>
     <para>
      Do not throw an error if the property graph 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 the property graph to remove.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>CASCADE</literal></term>
    <listitem>
     <para>
      Automatically drop objects that depend on the property graph, and in
      turn all objects that depend on those objects (see <xref
      linkend="ddl-depend"/>).
     </para>
    </listitem>
   </varlistentry>

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

 <refsect1>
  <title>Examples</title>

  <para>
<programlisting>
DROP PROPERTY GRAPH g1;
</programlisting></para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

  <para>
   <command>DROP PROPERTY GRAPH</command> conforms to ISO/IEC 9075-16
   (SQL/PGQ), except that the standard only allows one property graph to be
   dropped per command, and apart from the <literal>IF EXISTS</literal>
   option, which is a <productname>PostgreSQL</productname> extension.
  </para>
 </refsect1>

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

  <simplelist type="inline">
   <member><xref linkend="sql-create-property-graph"/></member>
   <member><xref linkend="sql-alter-property-graph"/></member>
  </simplelist>
 </refsect1>
</refentry>