* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.43 2000/07/02 22:00:48 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.44 2000/07/23 03:50:26 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
/* ---------- AMOP CACHES ---------- */
/*
- * op_class -
+ * op_class
*
* Return t iff operator 'opid' is in operator class 'opclass' for
* access method 'amopid'.
- *
*/
bool
op_class(Oid opid, Oid opclass, Oid amopid)
/* ---------- ATTRIBUTE CACHES ---------- */
/*
- * get_attname -
+ * get_attname
*
* Given the relation id and the attribute number,
* return the "attname" field from the attribute relation.
- *
*/
char *
get_attname(Oid relid, AttrNumber attnum)
tp = SearchSysCacheTuple(ATTNUM,
ObjectIdGetDatum(relid),
- UInt16GetDatum(attnum),
+ Int16GetDatum(attnum),
0, 0);
if (HeapTupleIsValid(tp))
{
}
/*
- * get_attnum -
+ * get_attnum
*
* Given the relation id and the attribute name,
* return the "attnum" field from the attribute relation.
- *
*/
AttrNumber
get_attnum(Oid relid, char *attname)
}
/*
- * get_atttype -
+ * get_atttype
*
* Given the relation OID and the attribute number with the relation,
* return the attribute type OID.
- *
*/
Oid
get_atttype(Oid relid, AttrNumber attnum)
tp = SearchSysCacheTuple(ATTNUM,
ObjectIdGetDatum(relid),
- UInt16GetDatum(attnum),
+ Int16GetDatum(attnum),
0, 0);
if (HeapTupleIsValid(tp))
{
}
/*
- * get_atttypmod -
+ * get_atttypmod
*
* Given the relation id and the attribute number,
* return the "atttypmod" field from the attribute relation.
- *
*/
int32
get_atttypmod(Oid relid, AttrNumber attnum)
tp = SearchSysCacheTuple(ATTNUM,
ObjectIdGetDatum(relid),
- UInt16GetDatum(attnum),
+ Int16GetDatum(attnum),
0, 0);
if (HeapTupleIsValid(tp))
{
/* ---------- OPERATOR CACHE ---------- */
/*
- * get_opcode -
+ * get_opcode
*
* Returns the regproc id of the routine used to implement an
* operator given the operator oid.
- *
*/
RegProcedure
get_opcode(Oid opno)
}
/*
- * get_opname -
+ * get_opname
* returns the name of the operator with the given opno
*
* Note: returns a palloc'd copy of the string, or NULL if no such operator.
}
/*
- * op_mergejoinable -
+ * op_mergejoinable
*
* Returns the left and right sort operators and types corresponding to a
* mergejoinable operator, or nil if the operator is not mergejoinable.
- *
*/
bool
op_mergejoinable(Oid opno, Oid ltype, Oid rtype, Oid *leftOp, Oid *rightOp)
optup->oprleft == ltype &&
optup->oprright == rtype)
{
- *leftOp = ObjectIdGetDatum(optup->oprlsortop);
- *rightOp = ObjectIdGetDatum(optup->oprrsortop);
+ *leftOp = optup->oprlsortop;
+ *rightOp = optup->oprrsortop;
return true;
}
}
* op_hashjoinable
*
* Returns the hash operator corresponding to a hashjoinable operator,
- * or nil if the operator is not hashjoinable.
- *
+ * or InvalidOid if the operator is not hashjoinable.
*/
Oid
op_hashjoinable(Oid opno, Oid ltype, Oid rtype)
}
/*
- * get_commutator -
+ * get_commutator
*
* Returns the corresponding commutator of an operator.
- *
*/
Oid
get_commutator(Oid opno)
}
/*
- * get_negator -
+ * get_negator
*
* Returns the corresponding negator of an operator.
- *
*/
Oid
get_negator(Oid opno)
}
/*
- * get_oprrest -
+ * get_oprrest
*
* Returns procedure id for computing selectivity of an operator.
- *
*/
RegProcedure
get_oprrest(Oid opno)
}
/*
- * get_oprjoin -
+ * get_oprjoin
*
* Returns procedure id for computing selectivity of a join.
- *
*/
RegProcedure
get_oprjoin(Oid opno)
get_func_rettype(Oid funcid)
{
HeapTuple func_tuple;
- Oid funcrettype;
func_tuple = SearchSysCacheTuple(PROCOID,
ObjectIdGetDatum(funcid),
0, 0, 0);
-
if (!HeapTupleIsValid(func_tuple))
elog(ERROR, "Function OID %u does not exist", funcid);
- funcrettype = (Oid)
- ((Form_pg_proc) GETSTRUCT(func_tuple))->prorettype;
-
- return funcrettype;
+ return ((Form_pg_proc) GETSTRUCT(func_tuple))->prorettype;
}
/* ---------- RELATION CACHE ---------- */
#ifdef NOT_USED
/*
- * get_relnatts -
+ * get_relnatts
*
* Returns the number of attributes for a given relation.
- *
*/
int
get_relnatts(Oid relid)
#endif
/*
- * get_rel_name -
+ * get_rel_name
*
* Returns the name of a given relation.
- *
*/
char *
get_rel_name(Oid relid)
/* ---------- TYPE CACHE ---------- */
/*
- * get_typlen -
+ * get_typlen
*
* Given the type OID, return the length of the type.
- *
*/
int16
get_typlen(Oid typid)
}
/*
- * get_typbyval -
+ * get_typbyval
*
* Given the type OID, determine whether the type is returned by value or
- * not. Returns 1 if by value, 0 if by reference.
- *
+ * not. Returns true if by value, false if by reference.
*/
bool
get_typbyval(Oid typid)
{
Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp);
- return (bool) typtup->typbyval;
+ return typtup->typbyval;
}
else
return false;
#endif
/*
- * get_typdefault -
+ * get_typdefault
*
* Given a type OID, return the typdefault field associated with that
* type, or Datum(NULL) if there is no typdefault. (This implies
}
/*
- * get_typtype -
+ * get_typtype
*
* Given the type OID, find if it is a basic type, a named relation
* or the generic type 'relation'.
* It returns the null char if the cache lookup fails...
- *
*/
#ifdef NOT_USED
char
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