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Functions live in namespaces. Qualified function names work, eg

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SELECT schema1.func2(...).  Aggregate names can be qualified at the
syntactic level, but the qualification is ignored for the moment.
This commit is contained in:
Tom Lane
2002-04-09 20:35:55 +00:00
parent c419c22414
commit f2d70d32eb
36 changed files with 655 additions and 661 deletions
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27
src/backend/parser/parse_coerce.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_coerce.c,v 2.68 2002/03/20 19:44:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_coerce.c,v 2.69 2002/04/09 20:35:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -657,7 +657,8 @@ PreferredType(CATEGORY category, Oid type)
* Look for a coercion function between two types.
*
* A coercion function must be named after (the internal name of) its
* result type, and must accept exactly the specified input type.
* result type, and must accept exactly the specified input type. We
* also require it to be defined in the same namespace as its result type.
*
* This routine is also used to look for length-coercion functions, which
* are similar but accept a second argument. secondArgType is the type
@ -669,14 +670,19 @@ PreferredType(CATEGORY category, Oid type)
static Oid
find_coercion_function(Oid targetTypeId, Oid inputTypeId, Oid secondArgType)
{
char *funcname;
Type targetType;
char *typname;
Oid typnamespace;
Oid oid_array[FUNC_MAX_ARGS];
int nargs;
HeapTuple ftup;
Form_pg_proc pform;
Oid funcid;
funcname = typeidTypeName(targetTypeId);
targetType = typeidType(targetTypeId);
typname = NameStr(((Form_pg_type) GETSTRUCT(targetType))->typname);
typnamespace = ((Form_pg_type) GETSTRUCT(targetType))->typnamespace;
MemSet(oid_array, 0, FUNC_MAX_ARGS * sizeof(Oid));
oid_array[0] = inputTypeId;
if (OidIsValid(secondArgType))
@ -687,22 +693,27 @@ find_coercion_function(Oid targetTypeId, Oid inputTypeId, Oid secondArgType)
else
nargs = 1;
ftup = SearchSysCache(PROCNAME,
PointerGetDatum(funcname),
Int32GetDatum(nargs),
ftup = SearchSysCache(PROCNAMENSP,
CStringGetDatum(typname),
Int16GetDatum(nargs),
PointerGetDatum(oid_array),
0);
ObjectIdGetDatum(typnamespace));
if (!HeapTupleIsValid(ftup))
{
ReleaseSysCache(targetType);
return InvalidOid;
}
/* Make sure the function's result type is as expected, too */
pform = (Form_pg_proc) GETSTRUCT(ftup);
if (pform->prorettype != targetTypeId)
{
ReleaseSysCache(ftup);
ReleaseSysCache(targetType);
return InvalidOid;
}
funcid = ftup->t_data->t_oid;
ReleaseSysCache(ftup);
ReleaseSysCache(targetType);
return funcid;
}