Use rename function

src/backend/distributed/commands/sequence.c

@@ -11,6 +11,7 @@
 
 #include "postgres.h"
 
+#include "access/xact.h"
 #include "catalog/dependency.h"
 #include "catalog/namespace.h"
 #include "commands/defrem.h"
@@ -23,6 +24,7 @@
 #include "distributed/metadata/distobject.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
+#include "distributed/worker_create_or_replace.h"
 #include "nodes/parsenodes.h"
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
@@ -698,3 +700,35 @@ GenerateBackupNameForSequenceCollision(const ObjectAddress *address)
 		count++;
 	}
 }
+
+
+/*
+ * RenameExistingSequenceWithDifferentTypeIfExists renames the sequence's type if
+ * that sequence exists and the desired sequence type is different than it's type.
+ */
+void
+RenameExistingSequenceWithDifferentTypeIfExists(RangeVar *sequence, Oid desiredSeqTypeId)
+{
+	Oid sequenceOid;
+	RangeVarGetAndCheckCreationNamespace(sequence, NoLock, &sequenceOid);
+
+	if (OidIsValid(sequenceOid))
+	{
+		Form_pg_sequence pgSequenceForm = pg_get_sequencedef(sequenceOid);
+		if (pgSequenceForm->seqtypid != desiredSeqTypeId)
+		{
+			ObjectAddress sequenceAddress = { 0 };
+			ObjectAddressSet(sequenceAddress, RelationRelationId, sequenceOid);
+
+			char *newName = GenerateBackupNameForCollision(&sequenceAddress);
+
+			RenameStmt *renameStmt = CreateRenameStatement(&sequenceAddress, newName);
+			const char *sqlRenameStmt = DeparseTreeNode((Node *) renameStmt);
+			ProcessUtilityParseTree((Node *) renameStmt, sqlRenameStmt,
+									PROCESS_UTILITY_QUERY,
+									NULL, None_Receiver, NULL);
+
+			CommandCounterIncrement();
+		}
+	}
+}

src/backend/distributed/worker/worker_data_fetch_protocol.c

@@ -28,6 +28,7 @@
 #include "commands/extension.h"
 #include "commands/sequence.h"
 #include "distributed/citus_ruleutils.h"
+#include "distributed/commands.h"
 #include "distributed/commands/multi_copy.h"
 #include "distributed/commands/utility_hook.h"
 #include "distributed/connection_management.h"
@@ -470,30 +471,9 @@ worker_apply_sequence_command(PG_FUNCTION_ARGS)
 	 * stayed on that node after a rollbacked create_distributed_table operation.
 	 * We must change it's name first to create the sequence with the correct type.
 	 */
-	Oid sequenceOid;
 	CreateSeqStmt *createSequenceStatement = (CreateSeqStmt *) commandNode;
-	char *sequenceName = createSequenceStatement->sequence->relname;
-	char *sequenceSchema = createSequenceStatement->sequence->schemaname;
-
-	RangeVarGetAndCheckCreationNamespace(createSequenceStatement->sequence, NoLock,
-										 &sequenceOid);
-	if (OidIsValid(sequenceOid))
-	{
-		Form_pg_sequence pgSequenceForm = pg_get_sequencedef(sequenceOid);
-		if (pgSequenceForm->seqtypid != sequenceTypeId)
-		{
-			ObjectAddress sequenceAddress = { 0 };
-			ObjectAddressSet(sequenceAddress, RelationRelationId, sequenceOid);
-
-			char *newName = GenerateBackupNameForCollision(&sequenceAddress);
-
-			RenameStmt *renameStmt = CreateRenameStatement(&sequenceAddress, newName);
-			const char *sqlRenameStmt = DeparseTreeNode((Node *) renameStmt);
-			ProcessUtilityParseTree((Node *) renameStmt, sqlRenameStmt,
-									PROCESS_UTILITY_QUERY,
-									NULL, None_Receiver, NULL);
-		}
-	}
+	RenameExistingSequenceWithDifferentTypeIfExists(createSequenceStatement->sequence,
+													sequenceTypeId);
 
 	/* run the CREATE SEQUENCE command */
 	ProcessUtilityParseTree(commandNode, commandString, PROCESS_UTILITY_QUERY, NULL,
@@ -502,6 +482,9 @@ worker_apply_sequence_command(PG_FUNCTION_ARGS)
 
 	Oid sequenceRelationId = RangeVarGetRelid(createSequenceStatement->sequence,
 											  AccessShareLock, false);
+	char *sequenceName = createSequenceStatement->sequence->relname;
+	char *sequenceSchema = createSequenceStatement->sequence->schemaname;
+
 	Assert(sequenceRelationId != InvalidOid);
 
 	AlterSequenceMinMax(sequenceRelationId, sequenceSchema, sequenceName, sequenceTypeId);

src/include/distributed/commands.h

@@ -398,6 +398,8 @@ extern ObjectAddress RenameSequenceStmtObjectAddress(Node *node, bool missing_ok
 extern void ErrorIfUnsupportedSeqStmt(CreateSeqStmt *createSeqStmt);
 extern void ErrorIfDistributedAlterSeqOwnedBy(AlterSeqStmt *alterSeqStmt);
 extern char * GenerateBackupNameForSequenceCollision(const ObjectAddress *address);
+extern void RenameExistingSequenceWithDifferentTypeIfExists(RangeVar *sequence,
+															Oid desiredSeqTypeId);
 
 /* statistics.c - forward declarations */
 extern List * PreprocessCreateStatisticsStmt(Node *node, const char *queryString,

src/include/distributed/worker_manager.h

@@ -104,7 +104,7 @@ extern WorkerNode * SetWorkerColumnLocalOnly(WorkerNode *workerNode, int columnI
 											 Datum value);
 extern uint32 CountPrimariesWithMetadata(void);
 extern WorkerNode * GetFirstPrimaryWorkerNode(void);
-extern List * SyncObjectDependenciesCommandList(WorkerNode *workerNode);
+extern List * SyncDistributedObjectsCommandList(WorkerNode *workerNode);
 extern List * PgDistTableMetadataSyncCommandList(void);
 
 /* Function declarations for worker node utilities */