Sophie: postgresql9.6-docs-9.6.17-2.mga7 noarch

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>CREATE ACCESS METHOD</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN78531"
></A
><H2
>Name</H2
>CREATE ACCESS METHOD&nbsp;--&nbsp;define a new access method</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN78534"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>CREATE ACCESS METHOD <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
>
    TYPE <TT
CLASS="REPLACEABLE"
><I
>access_method_type</I
></TT
>
    HANDLER <TT
CLASS="REPLACEABLE"
><I
>handler_function</I
></TT
></PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78539"
></A
><H2
>Description</H2
><P
>   <TT
CLASS="COMMAND"
>CREATE ACCESS METHOD</TT
> creates a new access method.
  </P
><P
>   The access method name must be unique within the database.
  </P
><P
>   Only superusers can define new access methods.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78545"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
></DT
><DD
><P
>      The name of the access method to be created.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>access_method_type</I
></TT
></DT
><DD
><P
>      This clause specifies the type of access method to define.
      Only <TT
CLASS="LITERAL"
>INDEX</TT
> is supported at present.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>handler_function</I
></TT
></DT
><DD
><P
>      <TT
CLASS="REPLACEABLE"
><I
>handler_function</I
></TT
> is the
      name (possibly schema-qualified) of a previously registered function
      that represents the access method.  The handler function must be
      declared to take a single argument of type <TT
CLASS="TYPE"
>internal</TT
>,
      and its return type depends on the type of access method;
      for <TT
CLASS="LITERAL"
>INDEX</TT
> access methods, it must
      be <TT
CLASS="TYPE"
>index_am_handler</TT
>.  The C-level API that the handler
      function must implement varies depending on the type of access method.
      The index access method API is described in <A
HREF="indexam.html"
>Chapter 59</A
>.
     </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78569"
></A
><H2
>Examples</H2
><P
>   Create an index access method <TT
CLASS="LITERAL"
>heptree</TT
> with
   handler function <TT
CLASS="LITERAL"
>heptree_handler</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>CREATE ACCESS METHOD heptree TYPE INDEX HANDLER heptree_handler;</PRE
><P>
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78575"
></A
><H2
>Compatibility</H2
><P
>   <TT
CLASS="COMMAND"
>CREATE ACCESS METHOD</TT
> is a
   <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> extension.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78580"
></A
><H2
>See Also</H2
><A
HREF="sql-drop-access-method.html"
>DROP ACCESS METHOD</A
>, <A
HREF="sql-createopclass.html"
>CREATE OPERATOR CLASS</A
>, <A
HREF="sql-createopfamily.html"
>CREATE OPERATOR FAMILY</A
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