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><H1
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><A
NAME="CATALOG-PG-PROC"
>41.24. <TT
CLASS="STRUCTNAME"
>pg_proc</TT
></A
></H1
><A
NAME="AEN54160"
></A
><P
> The catalog <TT
CLASS="STRUCTNAME"
>pg_proc</TT
> stores information about functions (or procedures).
See <A
HREF="sql-createfunction.html"
><I
>CREATE FUNCTION</I
></A
>
and <A
HREF="xfunc.html"
>Section 31.3</A
> for more information.
</P
><P
> The table contains data for aggregate functions as well as plain functions.
If <TT
CLASS="STRUCTFIELD"
>proisagg</TT
> is true, there should be a matching
row in <TT
CLASS="STRUCTFIELD"
>pg_aggregate</TT
>.
</P
><DIV
CLASS="TABLE"
><A
NAME="AEN54169"
></A
><P
><B
>Table 41-24. <TT
CLASS="STRUCTNAME"
>pg_proc</TT
> Columns</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>References</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proname</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
> </TD
><TD
>Name of the function</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>pronamespace</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-namespace.html"
><TT
CLASS="STRUCTNAME"
>pg_namespace</TT
></A
>.oid</TT
></TD
><TD
> The OID of the namespace that contains this function
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proowner</TT
></TD
><TD
><TT
CLASS="TYPE"
>int4</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-shadow.html"
><TT
CLASS="STRUCTNAME"
>pg_shadow</TT
></A
>.usesysid</TT
></TD
><TD
>Owner of the function</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>prolang</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-language.html"
><TT
CLASS="STRUCTNAME"
>pg_language</TT
></A
>.oid</TT
></TD
><TD
>Implementation language or call interface of this function</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proisagg</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
>Function is an aggregate function</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>prosecdef</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
>Function is a security definer (i.e., a <SPAN
CLASS="QUOTE"
>"setuid"</SPAN
>
function)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proisstrict</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
> Function returns null if any call argument is null. In that
case the function won't actually be called at all. Functions
that are not <SPAN
CLASS="QUOTE"
>"strict"</SPAN
> must be prepared to handle
null inputs.
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proretset</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
>Function returns a set (i.e., multiple values of the specified
data type)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>provolatile</TT
></TD
><TD
><TT
CLASS="TYPE"
>char</TT
></TD
><TD
> </TD
><TD
> <TT
CLASS="STRUCTFIELD"
>provolatile</TT
> tells whether the function's
result depends only on its input arguments, or is affected by outside
factors.
It is <TT
CLASS="LITERAL"
>i</TT
> for <SPAN
CLASS="QUOTE"
>"immutable"</SPAN
> functions,
which always deliver the same result for the same inputs.
It is <TT
CLASS="LITERAL"
>s</TT
> for <SPAN
CLASS="QUOTE"
>"stable"</SPAN
> functions,
whose results (for fixed inputs) do not change within a scan.
It is <TT
CLASS="LITERAL"
>v</TT
> for <SPAN
CLASS="QUOTE"
>"volatile"</SPAN
> functions,
whose results may change at any time. (Use <TT
CLASS="LITERAL"
>v</TT
> also
for functions with side-effects, so that calls to them cannot get
optimized away.)
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>pronargs</TT
></TD
><TD
><TT
CLASS="TYPE"
>int2</TT
></TD
><TD
> </TD
><TD
>Number of arguments</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>prorettype</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-type.html"
><TT
CLASS="STRUCTNAME"
>pg_type</TT
></A
>.oid</TT
></TD
><TD
>Data type of the return value</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proargtypes</TT
></TD
><TD
><TT
CLASS="TYPE"
>oidvector</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-type.html"
><TT
CLASS="STRUCTNAME"
>pg_type</TT
></A
>.oid</TT
></TD
><TD
>An array with the data types of the function arguments</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proargnames</TT
></TD
><TD
><TT
CLASS="TYPE"
>text[]</TT
></TD
><TD
> </TD
><TD
> An array with the names of the function arguments.
Arguments without a name are set to empty strings in the array.
If none of the arguments have a name, this field may be null.
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>prosrc</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
> </TD
><TD
> This tells the function handler how to invoke the function. It
might be the actual source code of the function for interpreted
languages, a link symbol, a file name, or just about anything
else, depending on the implementation language/call convention.
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>probin</TT
></TD
><TD
><TT
CLASS="TYPE"
>bytea</TT
></TD
><TD
> </TD
><TD
>Additional information about how to invoke the function.
Again, the interpretation is language-specific.
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>proacl</TT
></TD
><TD
><TT
CLASS="TYPE"
>aclitem[]</TT
></TD
><TD
> </TD
><TD
> Access privileges; see
<A
HREF="sql-grant.html"
><I
>GRANT</I
></A
> and
<A
HREF="sql-revoke.html"
><I
>REVOKE</I
></A
>
for details.
</TD
></TR
></TBODY
></TABLE
></DIV
><P
> For compiled functions, both built-in and dynamically loaded,
<TT
CLASS="STRUCTFIELD"
>prosrc</TT
> contains the function's C-language
name (link symbol). For all other currently-known language types,
<TT
CLASS="STRUCTFIELD"
>prosrc</TT
> contains the function's source
text. <TT
CLASS="STRUCTFIELD"
>probin</TT
> is unused except for
dynamically-loaded C functions, for which it gives the name of the
shared library file containing the function.
</P
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