Add inline function 'table_scan_flags' for table AM to get the scan flags.

Author: HuSen8891

src/backend/access/aocs/aocsam_handler.c

@@ -757,7 +757,7 @@ aoco_getnextslot(TableScanDesc scan, ScanDirection direction, TupleTableSlot *sl
 	return false;
 }
 
-static int
+static uint32
 aoco_scan_flags(Relation rel)
 {
 	return 0;

src/backend/access/appendonly/appendonlyam.c

@@ -1799,7 +1799,7 @@ appendonly_getnextslot(TableScanDesc scan, ScanDirection direction, TupleTableSl
 	return false;
 }
 
-int
+uint32
 appendonly_scan_flags(Relation relation)
 {
 	return 0;

src/backend/access/heap/heapam.c

@@ -1621,7 +1621,7 @@ heap_getnextslot_tidrange(TableScanDesc sscan, ScanDirection direction,
 	return true;
 }
 
-int
+uint32
 heap_scan_flags(Relation relation)
 {
 	return 0;

src/include/access/heapam.h

@@ -135,7 +135,7 @@ extern void heap_set_tidrange(TableScanDesc sscan, ItemPointer mintid,
 extern bool heap_getnextslot_tidrange(TableScanDesc sscan,
 									  ScanDirection direction,
 									  TupleTableSlot *slot);
-extern int heap_scan_flags(Relation relation);
+extern uint32 heap_scan_flags(Relation relation);
 extern bool heap_fetch(Relation relation, Snapshot snapshot,
 					   HeapTuple tuple, Buffer *userbuf);
 extern bool heap_fetch_extended(Relation relation, Snapshot snapshot,

src/include/access/tableam.h

@@ -395,7 +395,7 @@ typedef struct TableAmRoutine
 	 * AM can support, return the flags represented the supported features of
 	 * scan.
 	 */
-	int			(*scan_flags) (Relation rel);
+	uint32		(*scan_flags) (Relation rel);
 
 	/* ------------------------------------------------------------------------
 	 * Parallel table scan related functions.
@@ -1245,6 +1245,16 @@ table_scan_getnextslot_tidrange(TableScanDesc sscan, ScanDirection direction,
 															   slot);
 }
 
+/*
+ * Return the flags represented the supported features of table AM scan.
+ */
+static inline uint32
+table_scan_flags(Relation rel)
+{
+	if (rel->rd_tableam->scan_flags)
+		return rel->rd_tableam->scan_flags(rel);
+	return 0;
+}
 
 /* ----------------------------------------------------------------------------
  * Parallel table scan related functions.

src/include/cdb/cdbappendonlyam.h

@@ -445,7 +445,7 @@ extern void appendonly_endscan(TableScanDesc scan);
 extern bool appendonly_getnextslot(TableScanDesc scan,
 								   ScanDirection direction,
 								   TupleTableSlot *slot);
-extern int appendonly_scan_flags(Relation relation);
+extern uint32 appendonly_scan_flags(Relation relation);
 extern AppendOnlyFetchDesc appendonly_fetch_init(
 	Relation 	relation,
 	Snapshot    snapshot,