getIdentitySequence now uses Relation instead of relation_id

Relevant PG commit:
509199587df73f06eda898ae13284292f4ae573a
509199587d

src/backend/distributed/deparser/citus_ruleutils.c

@@ -395,7 +395,8 @@ pg_get_tableschemadef_string(Oid tableRelationId, IncludeSequenceDefaults
 			if (attributeForm->attidentity && includeIdentityDefaults)
 			{
 				bool missing_ok = false;
-				Oid seqOid = getIdentitySequence(RelationGetRelid(relation),
+				Oid seqOid = getIdentitySequence(identitySequenceRelation_compat(
+													 relation),
 												 attributeForm->attnum, missing_ok);
 
 				if (includeIdentityDefaults == INCLUDE_IDENTITY)

src/backend/distributed/worker/worker_data_fetch_protocol.c

@@ -170,7 +170,8 @@ worker_adjust_identity_column_seq_ranges(PG_FUNCTION_ARGS)
 
 		if (attributeForm->attidentity)
 		{
-			Oid sequenceOid = getIdentitySequence(tableRelationId,
+			Oid sequenceOid = getIdentitySequence(identitySequenceRelation_compat(
+													  tableRelation),
 												  attributeForm->attnum,
 												  missingSequenceOk);
 

src/include/pg_version_compat.h

@@ -100,6 +100,7 @@ getStxstattarget_compat(HeapTuple tup)
 
 #define WaitEventSetTracker_compat CurrentResourceOwner
 
+#define identitySequenceRelation_compat(a) (a)
 #else
 
 #include "access/htup_details.h"
@@ -123,6 +124,8 @@ getStxstattarget_compat(HeapTuple tup)
 
 #define WaitEventSetTracker_compat CurrentMemoryContext
 
+#define identitySequenceRelation_compat(a) (RelationGetRelid(a))
+
 #endif
 
 #if PG_VERSION_NUM >= PG_VERSION_16