Removes unnecessary files

src/backend/distributed/metadata/metadata_cache.c

@@ -182,8 +182,6 @@ typedef struct MetadataCacheData
 	Oid citusTaskStatusUnscheduledId;
 	Oid citusTaskStatusCancelledId;
 	Oid citusTaskStatusCancellingId;
-	Oid databaseShardRelationId;
-	Oid databaseShardPKeyIndexId;
 	Oid distRebalanceStrategyRelationId;
 	Oid distNodeRelationId;
 	Oid distNodeNodeIdIndexId;

src/include/distributed/database/database_sharding.h

@@ -1,53 +0,0 @@
-/*
- * database_sharding.h
- *
- * Data structure definition for managing backend data and related function
- *
- * Copyright (c) Microsoft, Inc.
- */
-
-#ifndef DATABASE_SHARDING_H
-#define DATABASE_SHARDING_H
-
-
-#include "tcop/utility.h"
-
-
-/* attributes of citus_catalog.database_shard */
-#define Natts_database_shard 3
-#define Anum_database_shard_database_id 1
-#define Anum_database_shard_node_group_id 2
-#define Anum_database_shard_is_available 3
-
-
-typedef struct DatabaseShard
-{
-	/* database oid */
-	Oid databaseOid;
-
-	/* node group on which the database shard is placed */
-	int nodeGroupId;
-
-	/* whether the database shard is available */
-	bool isAvailable;
-} DatabaseShard;
-
-/* citus.enable_database_sharding setting */
-extern bool EnableDatabaseSharding;
-
-void PreProcessUtilityInDatabaseShard(Node *parseTree, const char *queryString,
-									  ProcessUtilityContext context,
-									  bool *runPreviousUtilityHook);
-void PostProcessUtilityInDatabaseShard(Node *parseTree, const char *queryString,
-									   ProcessUtilityContext context);
-bool DatabaseShardingEnabled(void);
-void AssignDatabaseToShard(Oid databaseOid);
-void UpdateDatabaseShard(Oid databaseOid, int targetNodeGroupId);
-void DeleteDatabaseShardByDatabaseIdLocally(Oid databaseOid);
-DatabaseShard * GetDatabaseShardByOid(Oid databaseOid);
-List * ListDatabaseShards(void);
-int64 CitusDatabaseSize(Oid databaseId);
-char * InsertDatabaseShardAssignmentCommand(Oid databaseOid, int nodeGroupId);
-
-
-#endif

src/include/distributed/metadata_cache.h

@@ -247,7 +247,6 @@ extern Oid DistLocalGroupIdRelationId(void);
 extern Oid DistObjectRelationId(void);
 extern Oid DistEnabledCustomAggregatesId(void);
 extern Oid DistTenantSchemaRelationId(void);
-extern Oid DatabaseShardRelationId(void);
 
 /* index oids */
 extern Oid DistNodeNodeIdIndexId(void);
@@ -272,7 +271,6 @@ extern Oid DistObjectPrimaryKeyIndexId(void);
 extern Oid DistCleanupPrimaryKeyIndexId(void);
 extern Oid DistTenantSchemaPrimaryKeyIndexId(void);
 extern Oid DistTenantSchemaUniqueColocationIdIndexId(void);
-extern Oid DatabaseShardPrimaryKeyIndexId(void);
 
 /* sequence oids */
 extern Oid DistBackgroundJobJobIdSequenceId(void);

src/include/distributed/shared_library_init.h

@@ -17,8 +17,6 @@
 #define MAX_SHARD_COUNT 64000
 #define MAX_SHARD_REPLICATION_FACTOR 100
 
-extern char *CitusMainDatabase;
-
 extern PGDLLEXPORT ColumnarSupportsIndexAM_type extern_ColumnarSupportsIndexAM;
 extern PGDLLEXPORT CompressionTypeStr_type extern_CompressionTypeStr;
 extern PGDLLEXPORT IsColumnarTableAmTable_type extern_IsColumnarTableAmTable;