-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/create_cast.sgml,v 1.3 2002/09/01 02:37:02 tgl Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/create_cast.sgml,v 1.4 2002/09/15 13:04:16 petere Exp $ -->
<refentry id="SQL-CREATECAST">
<refmeta>
be schema-qualified. If it is not, the function will be looked
up in the path. The argument type must be identical to the
source type, the result data type must match the target type of
- the cast. Cast functions must be marked immutable.
+ the cast. Cast functions must be marked immutable or stable.
</para>
</listitem>
</varlistentry>
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/commands/functioncmds.c,v 1.19 2002/09/04 20:31:15 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/commands/functioncmds.c,v 1.20 2002/09/15 13:04:16 petere Exp $
*
* DESCRIPTION
* These routines take the parse tree and pick out the
elog(ERROR, "argument of cast function must match source data type");
if (procstruct->prorettype != targettypeid)
elog(ERROR, "return data type of cast function must match target data type");
- if (procstruct->provolatile != PROVOLATILE_IMMUTABLE)
- elog(ERROR, "cast function must be immutable");
+ if (procstruct->provolatile == PROVOLATILE_VOLATILE)
+ elog(ERROR, "cast function must not be volatile");
if (procstruct->proisagg)
elog(ERROR, "cast function must not be an aggregate function");
if (procstruct->proretset)