/*
* get_proposed_default_constraint
*
* This function returns the negation of new_part_constraints, which
* would be an integral part of the default partition constraints after
* addition of the partition to which the new_part_constraints belongs.
*/
List *
get_proposed_default_constraint(List *new_part_constraints)
{
Expr *defPartConstraint;
defPartConstraint = make_ands_explicit(new_part_constraints);
/*
* Derive the partition constraints of default partition by negating the
* given partition constraints. The partition constraint never evaluates
* to NULL, so negating it like this is safe.
*/
defPartConstraint = makeBoolExpr(NOT_EXPR,
list_make1(defPartConstraint),
-1);
/* Simplify, to put the negated expression into canonical form */
defPartConstraint =
(Expr *) eval_const_expressions(NULL,
(Node *) defPartConstraint);
defPartConstraint = canonicalize_qual(defPartConstraint, true);
return make_ands_implicit(defPartConstraint);
}
Datum
gp_get_physical_index_relid(PG_FUNCTION_ARGS)
{
Oid rootOid = PG_GETARG_OID(0);
Oid partOid = PG_GETARG_OID(1);
LogicalIndexInfo logicalIndexInfo;
Oid resultOid;
int2vector *indexKeys;
text *inText;
Relation rel;
logicalIndexInfo.nColumns = 0;
logicalIndexInfo.indexKeys = NULL;
logicalIndexInfo.indPred = NIL;
logicalIndexInfo.indExprs = NIL;
if (!PG_ARGISNULL(2))
{
indexKeys = (int2vector *)PG_GETARG_POINTER(2);
logicalIndexInfo.nColumns = indexKeys->dim1;
logicalIndexInfo.indexKeys = (AttrNumber *)palloc0(indexKeys->dim1 * sizeof(AttrNumber));
for (int i = 0; i < indexKeys->dim1; i++)
logicalIndexInfo.indexKeys[i] = indexKeys->values[i];
}
if (!PG_ARGISNULL(3))
{
Node *indPred;
inText = PG_GETARG_TEXT_P(3);
indPred = stringToNode(text_to_cstring(inText));
/* Perform the same normalization as relcache.c does. */
indPred = eval_const_expressions(NULL, indPred);
indPred = (Node *) canonicalize_qual((Expr *) indPred);
set_coercionform_dontcare(indPred);
indPred = (Node *) make_ands_implicit((Expr *) indPred);
fix_opfuncids(indPred);
logicalIndexInfo.indPred = (List *) indPred;
}
if (!PG_ARGISNULL(4))
{
Node *indExprs;
inText = PG_GETARG_TEXT_P(4);
indExprs = stringToNode(text_to_cstring(inText));
/* Perform the same normalization as relcache.c does. */
indExprs = eval_const_expressions(NULL, indExprs);
set_coercionform_dontcare(indExprs);
fix_opfuncids(indExprs);
logicalIndexInfo.indExprs = (List *) indExprs;
}
logicalIndexInfo.indIsUnique = PG_GETARG_BOOL(5);
AttrNumber *attMap = IndexScan_GetColumnMapping(rootOid, partOid);
rel = heap_open(partOid, AccessShareLock);
/*
* The varno is hard-coded to 1 as the original getPhysicalIndexRelid was
* using a hard-coded 1 for varattno mapping of logicalIndexInfo.
*/
IndexScan_MapLogicalIndexInfo(&logicalIndexInfo, attMap, 1);
/* do the actual work */
resultOid = getPhysicalIndexRelid(rel, &logicalIndexInfo);
if (attMap)
{
pfree(attMap);
}
heap_close(rel, AccessShareLock);
return ObjectIdGetDatum(resultOid);
}
