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>LOAD</H1
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><H2
>Name</H2
>LOAD&nbsp;--&nbsp;load a shared library file</DIV
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NAME="AEN76290"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>LOAD '<TT
CLASS="REPLACEABLE"
><I
>filename</I
></TT
>'</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="SQL-LOAD-DESCRIPTION"
></A
><H2
>Description</H2
><P
>   This command loads a shared library file into the <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
   server's address space.  If the file has been loaded already,
   the command does nothing.  Shared library files that contain C functions
   are automatically loaded whenever one of their functions is called.
   Therefore, an explicit <TT
CLASS="COMMAND"
>LOAD</TT
> is usually only needed to
   load a library that modifies the server's behavior through <SPAN
CLASS="QUOTE"
>"hooks"</SPAN
>
   rather than providing a set of functions.
  </P
><P
>   The file name is specified in the same way as for shared library
   names in <A
HREF="sql-createfunction.html"
>CREATE FUNCTION</A
>; in particular, one
   can rely on a search path and automatic addition of the system's standard
   shared library file name extension.  See <A
HREF="xfunc-c.html"
>Section 35.9</A
> for
   more information on this topic.
  </P
><P
>   Non-superusers can only apply <TT
CLASS="COMMAND"
>LOAD</TT
> to library files
   located in <TT
CLASS="FILENAME"
>$libdir/plugins/</TT
> &mdash; the specified
   <TT
CLASS="REPLACEABLE"
><I
>filename</I
></TT
> must begin
   with exactly that string.  (It is the database administrator's
   responsibility to ensure that only <SPAN
CLASS="QUOTE"
>"safe"</SPAN
> libraries
   are installed there.)
  </P
></DIV
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><A
NAME="SQL-LOAD-COMPAT"
></A
><H2
>Compatibility</H2
><P
>   <TT
CLASS="COMMAND"
>LOAD</TT
> is a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
   extension.
  </P
></DIV
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><A
NAME="AEN76315"
></A
><H2
>See Also</H2
><P
>   <A
HREF="sql-createfunction.html"
>CREATE FUNCTION</A
>
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