Address comments

- Fix warnings

src/backend/distributed/operations/split_shard_replication_setup.c

@@ -43,11 +43,11 @@ static ShardSplitInfo * CreateShardSplitInfo(uint64 sourceShardIdToSplit,
 											 int32 maxValue,
 											 int32 nodeId);
 static void AddShardSplitInfoEntryForNodeInMap(ShardSplitInfo *shardSplitInfo);
-static void * PopulateShardSplitInfoInSM(ShardSplitInfo *shardSplitInfoArray,
+static void PopulateShardSplitInfoInSM(ShardSplitInfo *shardSplitInfoArray,
 									   HTAB *shardInfoHashMap,
 									   dsm_handle dsmHandle,
 									   int shardSplitInfoCount);
-static void SetupHashMapForShardInfo();
+static void SetupHashMapForShardInfo(void);
 
 /*
  * split_shard_replication_setup UDF creates in-memory data structures
@@ -171,7 +171,7 @@ ParseShardSplitInfo(ArrayType *shardInfoArrayObject,
 					int32 *nodeId)
 {
 	Oid elemtypeId = ARR_ELEMTYPE(shardInfoArrayObject);
-	int elemtypeLength = 0;
+	int16 elemtypeLength = 0;
 	bool elemtypeByValue = false;
 	char elemtypeAlignment = 0;
 	get_typlenbyvalalign(elemtypeId, &elemtypeLength, &elemtypeByValue,
@@ -296,8 +296,6 @@ ParseShardSplitInfo(ArrayType *shardInfoArrayObject,
 	}
 
 	*nodeId = DatumGetInt32(nodeIdDat);
-
-	PG_RETURN_VOID();
 }
 
 
@@ -385,7 +383,7 @@ CreateShardSplitInfo(uint64 sourceShardIdToSplit,
  * AddShardSplitInfoEntryForNodeInMap function add's ShardSplitInfo entry
  * to the hash map. The key is nodeId on which the new shard is to be placed.
  */
-void
+static void
 AddShardSplitInfoEntryForNodeInMap(ShardSplitInfo *shardSplitInfo)
 {
 	uint32_t keyNodeId = shardSplitInfo->nodeId;
@@ -402,8 +400,6 @@ AddShardSplitInfoEntryForNodeInMap(ShardSplitInfo *shardSplitInfo)
 
 	nodeMappingEntry->shardSplitInfoList =
 		lappend(nodeMappingEntry->shardSplitInfoList, (ShardSplitInfo *) shardSplitInfo);
-
-	PG_RETURN_VOID();
 }
 
 
@@ -420,7 +416,7 @@ AddShardSplitInfoEntryForNodeInMap(ShardSplitInfo *shardSplitInfo)
  *
  * dsmHandle           - Shared memory segment handle
  */
-void *
+static void
 PopulateShardSplitInfoInSM(ShardSplitInfo *shardSplitInfoArray,
 						   HTAB *shardInfoHashMap,
 						   dsm_handle dsmHandle,
@@ -455,6 +451,4 @@ PopulateShardSplitInfoInSM(ShardSplitInfo *shardSplitInfoArray,
 			index++;
 		}
 	}
-
-	PG_RETURN_VOID();
 }

src/backend/distributed/shardsplit/pgoutput.c

@@ -33,6 +33,10 @@ static int32_t GetHashValueForIncomingTuple(Relation sourceShardRelation,
 											HeapTuple tuple,
 											bool *shouldHandleUpdate);
 
+static Oid FindTargetRelationOid(Relation sourceShardRelation,
+								 HeapTuple tuple,
+								 char *currentSlotName);
+
 void
 _PG_output_plugin_init(OutputPluginCallbacks *cb)
 {
@@ -132,7 +136,7 @@ GetHashValueForIncomingTuple(Relation sourceShardRelation,
  * tuple               - changed tuple.
  * currentSlotName     - Name of replication slot that is processing this update.
  */
-Oid
+static Oid
 FindTargetRelationOid(Relation sourceShardRelation,
 					  HeapTuple tuple,
 					  char *currentSlotName)
@@ -185,15 +189,11 @@ FindTargetRelationOid(Relation sourceShardRelation,
 bool
 ShouldCommitBeApplied(Relation sourceShardRelation)
 {
-	ShardSplitInfo *shardSplitInfo = NULL;
-	int partitionColumnIndex = -1;
-	Oid distributedTableOid = InvalidOid;
-
 	Oid sourceShardOid = sourceShardRelation->rd_id;
 	for (int i = 0; i < shardSplitInfoArraySize; i++)
 	{
 		/* skip the commit when destination is equal to the source */
-		shardSplitInfo = &shardSplitInfoArray[i];
+		ShardSplitInfo *shardSplitInfo = &shardSplitInfoArray[i];
 		if (shardSplitInfo->splitChildShardOid == sourceShardOid)
 		{
 			return false;

src/test/regress/expected/split_shard_replication_setup.out

@@ -37,7 +37,7 @@ SELECT create_distributed_table('slotName_table','id');
 -- 5. Create Replication slot with 'decoding_plugin_for_shard_split'
 -- 6. Setup Pub/Sub
 -- 7. Insert into table_to_split_1 at source worker1
--- 8. Expect the results in either table_to_split_2 or table_to_split_2 at worker2
+-- 8. Expect the results in either table_to_split_2 or table_to_split_3 at worker2
 \c - - - :worker_2_port
 CREATE TABLE table_to_split_1(id bigserial PRIMARY KEY, value char);
 CREATE TABLE table_to_split_2(id bigserial PRIMARY KEY, value char);

src/test/regress/sql/split_shard_replication_setup.sql

@@ -31,7 +31,7 @@ SELECT create_distributed_table('slotName_table','id');
 -- 5. Create Replication slot with 'decoding_plugin_for_shard_split'
 -- 6. Setup Pub/Sub
 -- 7. Insert into table_to_split_1 at source worker1
--- 8. Expect the results in either table_to_split_2 or table_to_split_2 at worker2
+-- 8. Expect the results in either table_to_split_2 or table_to_split_3 at worker2
 
 \c - - - :worker_2_port
 CREATE TABLE table_to_split_1(id bigserial PRIMARY KEY, value char);