Function makePartitionCreateStmt

src/backend/parser/parse_partition_gp.c:891–939

* Construct a CreateStmt representing a single partition to be created as part * of a legacy style CREATE/ALTER statement. */

 * of a legacy style CREATE/ALTER statement.
 */
CreateStmt *
makePartitionCreateStmt(Relation parentrel, char *partname, PartitionBoundSpec *boundspec,
						PartitionSpec *subPart, GpPartDefElem *elem,
						partname_comp *partnamecomp, CreateStmtOrigin origin)
{
	CreateStmt *childstmt;
	RangeVar   *parentrv;
	RangeVar   *childrv;
	char	   *schemaname;
	const char *final_part_name;

	if (partnamecomp->tablename)
		final_part_name = partnamecomp->tablename;
	else
		final_part_name = ChoosePartitionName(RelationGetRelationName(parentrel),
											  partnamecomp->level,
											  RelationGetNamespace(parentrel),
											  partname,
											  ++partnamecomp->partnum);

	schemaname = get_namespace_name(parentrel->rd_rel->relnamespace);
	parentrv = makeRangeVar(schemaname, pstrdup(RelationGetRelationName(parentrel)), -1);
	parentrv->relpersistence = parentrel->rd_rel->relpersistence;

	childrv = makeRangeVar(schemaname, (char *)final_part_name, -1);
	childrv->relpersistence = parentrel->rd_rel->relpersistence;

	childstmt = makeNode(CreateStmt);
	childstmt->relation = childrv;
	childstmt->tableElts = NIL;
	childstmt->inhRelations = list_make1(parentrv);
	childstmt->partbound = boundspec;
	childstmt->partspec = subPart;
	childstmt->ofTypename = NULL;
	childstmt->constraints = NIL;
	childstmt->options = elem->options ? copyObject(elem->options) : NIL;
	childstmt->oncommit = ONCOMMIT_NOOP;
	childstmt->tablespacename = elem->tablespacename ? pstrdup(elem->tablespacename) : NULL;
	childstmt->accessMethod = elem->accessMethod ? pstrdup(elem->accessMethod) : NULL;
	childstmt->if_not_exists = false;
	childstmt->origin = origin;
	childstmt->distributedBy = make_distributedby_for_rel(parentrel);
	childstmt->partitionBy = NULL;
	childstmt->relKind = 0;
	childstmt->ownerid = parentrel->rd_rel->relowner;
	childstmt->attr_encodings = copyObject(elem->colencs);

	return childstmt;
}

/* Generate partitions for START (..) END (..) EVERY (..) */
static List *