diff --git a/src/backend/commands/matview.c b/src/backend/commands/matview.c
index 9d9b66ead95..6484d35744a 100644
--- a/src/backend/commands/matview.c
+++ b/src/backend/commands/matview.c
@@ -2093,6 +2093,11 @@ ivm_visible_in_prestate(PG_FUNCTION_ARGS)
 	Oid			tableoid = PG_GETARG_OID(0);
 	ItemPointer itemPtr = PG_GETARG_ITEMPOINTER(1);
 	Oid			matviewOid = PG_GETARG_OID(2);
+	/*
+	CBDB_PG_15_FIXME: Here, we do not use the 4th argument of this function. 
+	Either justify its existence by using it, or remove the 4th argument from
+	the function definition (catalog change).
+	*/
 	ListCell   *lc;
 	bool	result = true;
 	bool	found = false;
@@ -2175,7 +2180,7 @@ get_prestate_rte(RangeTblEntry *rte, MV_TriggerTable *table,
 	initStringInfo(&str);
 	appendStringInfo(&str,
 			"SELECT t.* FROM %s t"
-			" WHERE pg_catalog.ivm_visible_in_prestate(t.tableoid, t.ctid,%d::pg_catalog.oid, t.gp_segment_id)",
+			" WHERE pg_catalog.ivm_visible_in_prestate(t.tableoid, t.ctid, %d::pg_catalog.oid, t.gp_segment_id)",
 				relname, matviewid);
 
 	/*
@@ -2189,6 +2194,8 @@ get_prestate_rte(RangeTblEntry *rte, MV_TriggerTable *table,
 			tuplestore_get_sharedname(tuplestore));
 	}
 
+	elogif(Debug_print_ivm, INFO, "IVM execute prestate visibilty chek new %s", str.data);
+
 	/* Get a subquery representing pre-state of the table */
 	raw = (RawStmt*)linitial(raw_parser(str.data, RAW_PARSE_DEFAULT));
 	subquery = transformStmt(pstate, raw->stmt);
@@ -3857,4 +3864,4 @@ ivm_set_ts_persitent_name(TriggerData *trigdata, Oid relid, Oid mvid)
 	oldctx = MemoryContextSwitchTo(TopMemoryContext);
 	SetTransitionTableName(relid, cmd, mvid);
 	MemoryContextSwitchTo(oldctx);
-}
\ No newline at end of file
+}