Remove master from file hierarchy

src/backend/distributed/Makefile

@@ -16,7 +16,7 @@ generated_sql_files = $(patsubst %,$(citus_abs_srcdir)/build/%,$(template_sql_fi
 DATA_built = $(generated_sql_files)
 
 # directories with source files
-SUBDIRS = . commands connection ddl deparser executor master metadata planner progress relay safeclib test transaction utils worker
+SUBDIRS = . commands connection ddl deparser executor metadata operations planner progress relay safeclib test transaction utils worker
 
 # Symlinks are not copied over to the build directory if a separete build
 # directory is used during configure (such as on CI)

src/backend/distributed/commands/call.c

@@ -21,7 +21,7 @@
 #include "distributed/commands/utility_hook.h"
 #include "distributed/connection_management.h"
 #include "distributed/deparse_shard_query.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/multi_physical_planner.h"

src/backend/distributed/commands/collation.c

@@ -18,7 +18,7 @@
 #include "distributed/commands.h"
 #include "distributed/deparser.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata/distobject.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/commands/create_distributed_table.c

@@ -40,8 +40,8 @@
 #include "distributed/commands.h"
 #include "distributed/distribution_column.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/commands/drop_distributed_table.c

@@ -12,8 +12,8 @@
 #include "miscadmin.h"
 
 #include "distributed/commands/utility_hook.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/worker_transaction.h"
 #include "utils/builtins.h"

src/backend/distributed/commands/extension.c

@@ -19,7 +19,7 @@
 #include "distributed/commands/utility_hook.h"
 #include "distributed/deparser.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/metadata/dependency.h"
 #include "distributed/metadata/distobject.h"

src/backend/distributed/commands/foreign_constraint.c

@@ -24,7 +24,7 @@
 #include "distributed/colocation_utils.h"
 #include "distributed/commands.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/namespace_utils.h"
 #include "distributed/reference_table_utils.h"

src/backend/distributed/commands/function.c

@@ -39,8 +39,8 @@
 #include "distributed/deparser.h"
 #include "distributed/listutils.h"
 #include "distributed/maintenanced.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata/distobject.h"
 #include "distributed/metadata/pg_dist_object.h"
 #include "distributed/metadata_sync.h"

src/backend/distributed/commands/index.c

@@ -27,7 +27,7 @@
 #include "distributed/deparse_shard_query.h"
 #include "distributed/distributed_planner.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_physical_planner.h"
 #include "distributed/resource_lock.h"

src/backend/distributed/commands/multi_copy.c

@@ -73,7 +73,7 @@
 #include "distributed/intermediate_results.h"
 #include "distributed/local_executor.h"
 #include "distributed/log_utils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_partitioning_utils.h"
 #include "distributed/multi_physical_planner.h"

src/backend/distributed/commands/role.c

@@ -30,7 +30,7 @@
 #include "distributed/commands/utility_hook.h"
 #include "distributed/deparser.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata/distobject.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/worker_transaction.h"

src/backend/distributed/commands/table.c

@@ -25,7 +25,7 @@
 #include "distributed/deparser.h"
 #include "distributed/deparse_shard_query.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"
 #include "distributed/multi_partitioning_utils.h"

src/backend/distributed/commands/truncate.c

@@ -9,12 +9,20 @@
  */
 
 #include "postgres.h"
+#include "miscadmin.h"
 
 #include "catalog/namespace.h"
 #include "catalog/pg_class.h"
+#include "commands/tablecmds.h"
+#include "commands/trigger.h"
+#include "distributed/adaptive_executor.h"
 #include "distributed/citus_ruleutils.h"
 #include "distributed/commands.h"
+#include "distributed/commands/utility_hook.h"
+#include "distributed/coordinator_protocol.h"
+#include "distributed/deparse_shard_query.h"
 #include "distributed/distributed_planner.h"
+#include "distributed/foreign_key_relationship.h"
 #include "distributed/listutils.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
@@ -27,6 +35,7 @@
 #include "storage/lmgr.h"
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
+#include "utils/regproc.h"
 #include "utils/rel.h"
 
 
@@ -39,6 +48,192 @@ static void ExecuteTruncateStmtSequentialIfNecessary(TruncateStmt *command);
 static void EnsurePartitionTableNotReplicatedForTruncate(TruncateStmt *truncateStatement);
 static void LockTruncatedRelationMetadataInWorkers(TruncateStmt *truncateStatement);
 static void AcquireDistributedLockOnRelations(List *relationIdList, LOCKMODE lockMode);
+static List * TruncateTaskList(Oid relationId);
+
+
+/* exports for SQL callable functions */
+PG_FUNCTION_INFO_V1(citus_truncate_trigger);
+PG_FUNCTION_INFO_V1(truncate_local_data_after_distributing_table);
+
+void EnsureLocalTableCanBeTruncated(Oid relationId);
+
+
+/*
+ * citus_truncate_trigger is called as a trigger when a distributed
+ * table is truncated.
+ */
+Datum
+citus_truncate_trigger(PG_FUNCTION_ARGS)
+{
+	if (!CALLED_AS_TRIGGER(fcinfo))
+	{
+		ereport(ERROR, (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
+						errmsg("must be called as trigger")));
+	}
+
+	TriggerData *triggerData = (TriggerData *) fcinfo->context;
+	Relation truncatedRelation = triggerData->tg_relation;
+	Oid relationId = RelationGetRelid(truncatedRelation);
+	char partitionMethod = PartitionMethod(relationId);
+
+	if (!EnableDDLPropagation)
+	{
+		PG_RETURN_DATUM(PointerGetDatum(NULL));
+	}
+
+	if (partitionMethod == DISTRIBUTE_BY_APPEND)
+	{
+		Oid schemaId = get_rel_namespace(relationId);
+		char *schemaName = get_namespace_name(schemaId);
+		char *relationName = get_rel_name(relationId);
+
+		DirectFunctionCall3(master_drop_all_shards,
+							ObjectIdGetDatum(relationId),
+							CStringGetTextDatum(relationName),
+							CStringGetTextDatum(schemaName));
+	}
+	else
+	{
+		List *taskList = TruncateTaskList(relationId);
+
+		/*
+		 * If it is a local placement of a distributed table or a reference table,
+		 * then execute TRUNCATE command locally.
+		 */
+		bool localExecutionSupported = true;
+		ExecuteUtilityTaskList(taskList, localExecutionSupported);
+	}
+
+	PG_RETURN_DATUM(PointerGetDatum(NULL));
+}
+
+
+/*
+ * TruncateTaskList returns a list of tasks to execute a TRUNCATE on a
+ * distributed table. This is handled separately from other DDL commands
+ * because we handle it via the TRUNCATE trigger, which is called whenever
+ * a truncate cascades.
+ */
+static List *
+TruncateTaskList(Oid relationId)
+{
+	/* resulting task list */
+	List *taskList = NIL;
+
+	/* enumerate the tasks when putting them to the taskList */
+	int taskId = 1;
+
+	Oid schemaId = get_rel_namespace(relationId);
+	char *schemaName = get_namespace_name(schemaId);
+	char *relationName = get_rel_name(relationId);
+
+	List *shardIntervalList = LoadShardIntervalList(relationId);
+
+	/* lock metadata before getting placement lists */
+	LockShardListMetadata(shardIntervalList, ShareLock);
+
+	ShardInterval *shardInterval = NULL;
+	foreach_ptr(shardInterval, shardIntervalList)
+	{
+		uint64 shardId = shardInterval->shardId;
+		char *shardRelationName = pstrdup(relationName);
+
+		/* build shard relation name */
+		AppendShardIdToName(&shardRelationName, shardId);
+
+		char *quotedShardName = quote_qualified_identifier(schemaName, shardRelationName);
+
+		StringInfo shardQueryString = makeStringInfo();
+		appendStringInfo(shardQueryString, "TRUNCATE TABLE %s CASCADE", quotedShardName);
+
+		Task *task = CitusMakeNode(Task);
+		task->jobId = INVALID_JOB_ID;
+		task->taskId = taskId++;
+		task->taskType = DDL_TASK;
+		SetTaskQueryString(task, shardQueryString->data);
+		task->dependentTaskList = NULL;
+		task->replicationModel = REPLICATION_MODEL_INVALID;
+		task->anchorShardId = shardId;
+		task->taskPlacementList = ActiveShardPlacementList(shardId);
+
+		taskList = lappend(taskList, task);
+	}
+
+	return taskList;
+}
+
+
+/*
+ * truncate_local_data_after_distributing_table truncates the local records of a distributed table.
+ *
+ * The main advantage of this function is to truncate all local records after creating a
+ * distributed table, and prevent constraints from failing due to outdated local records.
+ */
+Datum
+truncate_local_data_after_distributing_table(PG_FUNCTION_ARGS)
+{
+	Oid relationId = PG_GETARG_OID(0);
+
+	CheckCitusVersion(ERROR);
+	EnsureCoordinator();
+	EnsureLocalTableCanBeTruncated(relationId);
+
+	TruncateStmt *truncateStmt = makeNode(TruncateStmt);
+
+	char *relationName = generate_qualified_relation_name(relationId);
+	List *names = stringToQualifiedNameList(relationName);
+	truncateStmt->relations = list_make1(makeRangeVarFromNameList(names));
+	truncateStmt->restart_seqs = false;
+	truncateStmt->behavior = DROP_CASCADE;
+
+	set_config_option("citus.enable_ddl_propagation", "false",
+					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
+					  GUC_ACTION_LOCAL, true, 0, false);
+	ExecuteTruncate(truncateStmt);
+	set_config_option("citus.enable_ddl_propagation", "true",
+					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
+					  GUC_ACTION_LOCAL, true, 0, false);
+
+	PG_RETURN_VOID();
+}
+
+
+/*
+ * EnsureLocalTableCanBeTruncated performs the necessary checks to make sure it
+ * is safe to truncate the local table of a distributed table
+ */
+void
+EnsureLocalTableCanBeTruncated(Oid relationId)
+{
+	/* error out if the relation is not a distributed table */
+	if (!IsCitusTable(relationId))
+	{
+		ereport(ERROR, (errmsg("supplied parameter is not a distributed relation"),
+						errdetail("This UDF only truncates local records of distributed "
+								  "tables.")));
+	}
+
+	/* make sure there are no foreign key references from a local table */
+	SetForeignConstraintRelationshipGraphInvalid();
+	List *referencingRelationList = ReferencingRelationIdList(relationId);
+
+	Oid referencingRelation = InvalidOid;
+	foreach_oid(referencingRelation, referencingRelationList)
+	{
+		/* we do not truncate a table if there is a local table referencing it */
+		if (!IsCitusTable(referencingRelation))
+		{
+			char *referencedRelationName = get_rel_name(relationId);
+			char *referencingRelationName = get_rel_name(referencingRelation);
+
+			ereport(ERROR, (errmsg("cannot truncate a table referenced in a "
+								   "foreign key constraint by a local table"),
+							errdetail("Table \"%s\" references \"%s\"",
+									  referencingRelationName,
+									  referencedRelationName)));
+		}
+	}
+}
 
 
 /*

src/backend/distributed/commands/utility_hook.c

@@ -47,7 +47,7 @@
 #include "distributed/listutils.h"
 #include "distributed/local_executor.h"
 #include "distributed/maintenanced.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/connection/placement_connection.c

@@ -16,7 +16,7 @@
 #include "distributed/connection_management.h"
 #include "distributed/hash_helpers.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/distributed_planner.h"
 #include "distributed/multi_partitioning_utils.h"

src/backend/distributed/deparser/citus_ruleutils.c

@@ -39,7 +39,7 @@
 #include "distributed/citus_ruleutils.h"
 #include "distributed/multi_partitioning_utils.h"
 #include "distributed/relay_utility.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/version_compat.h"
 #include "foreign/foreign.h"

src/backend/distributed/executor/distributed_intermediate_results.c

@@ -23,7 +23,7 @@
 #include "distributed/deparse_shard_query.h"
 #include "distributed/intermediate_results.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/multi_physical_planner.h"

src/backend/distributed/executor/intermediate_results.c

@@ -23,7 +23,7 @@
 #include "distributed/error_codes.h"
 #include "distributed/intermediate_results.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_client_executor.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/executor/local_executor.c

@@ -91,7 +91,7 @@
 #include "distributed/local_executor.h"
 #include "distributed/local_plan_cache.h"
 #include "distributed/multi_executor.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/relation_access_tracking.h"
 #include "distributed/remote_commands.h" /* to access LogRemoteCommands */

src/backend/distributed/executor/multi_executor.c

@@ -24,9 +24,9 @@
 #include "distributed/insert_select_executor.h"
 #include "distributed/insert_select_planner.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/multi_executor.h"
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "distributed/distributed_planner.h"
 #include "distributed/multi_router_planner.h"
 #include "distributed/multi_resowner.h"

src/backend/distributed/executor/multi_server_executor.c

@@ -26,7 +26,7 @@
 #include "distributed/multi_physical_planner.h"
 #include "distributed/multi_resowner.h"
 #include "distributed/multi_server_executor.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/subplan_execution.h"
 #include "distributed/worker_protocol.h"
 #include "utils/lsyscache.h"

src/backend/distributed/executor/partitioned_intermediate_results.c

@@ -20,7 +20,7 @@
 #include "catalog/pg_am.h"
 #include "catalog/pg_type.h"
 #include "distributed/intermediate_results.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/pg_dist_shard.h"

src/backend/distributed/master/master_truncate.c

@@ -1,221 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * master_truncate.c
- *
- * Routine for truncating local data after a table has been distributed.
- *
- * Copyright (c) Citus Data, Inc.
- *
- *-------------------------------------------------------------------------
- */
-
-#include "postgres.h"
-#include "miscadmin.h"
-
-#include <stddef.h>
-
-#include "commands/tablecmds.h"
-#include "commands/trigger.h"
-#include "distributed/citus_ruleutils.h"
-#include "distributed/adaptive_executor.h"
-#include "distributed/commands/utility_hook.h"
-#include "distributed/deparse_shard_query.h"
-#include "distributed/foreign_key_relationship.h"
-#include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
-#include "distributed/master_protocol.h"
-#include "distributed/multi_executor.h"
-#include "distributed/multi_join_order.h"
-#include "distributed/pg_dist_partition.h"
-#include "distributed/resource_lock.h"
-#include "utils/builtins.h"
-#include "utils/lsyscache.h"
-#include "utils/regproc.h"
-#include "utils/rel.h"
-
-static List * TruncateTaskList(Oid relationId);
-
-
-/* exports for SQL callable functions */
-PG_FUNCTION_INFO_V1(citus_truncate_trigger);
-PG_FUNCTION_INFO_V1(truncate_local_data_after_distributing_table);
-
-void EnsureLocalTableCanBeTruncated(Oid relationId);
-
-
-/*
- * citus_truncate_trigger is called as a trigger when a distributed
- * table is truncated.
- */
-Datum
-citus_truncate_trigger(PG_FUNCTION_ARGS)
-{
-	if (!CALLED_AS_TRIGGER(fcinfo))
-	{
-		ereport(ERROR, (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
-						errmsg("must be called as trigger")));
-	}
-
-	TriggerData *triggerData = (TriggerData *) fcinfo->context;
-	Relation truncatedRelation = triggerData->tg_relation;
-	Oid relationId = RelationGetRelid(truncatedRelation);
-	char partitionMethod = PartitionMethod(relationId);
-
-	if (!EnableDDLPropagation)
-	{
-		PG_RETURN_DATUM(PointerGetDatum(NULL));
-	}
-
-	if (partitionMethod == DISTRIBUTE_BY_APPEND)
-	{
-		Oid schemaId = get_rel_namespace(relationId);
-		char *schemaName = get_namespace_name(schemaId);
-		char *relationName = get_rel_name(relationId);
-
-		DirectFunctionCall3(master_drop_all_shards,
-							ObjectIdGetDatum(relationId),
-							CStringGetTextDatum(relationName),
-							CStringGetTextDatum(schemaName));
-	}
-	else
-	{
-		List *taskList = TruncateTaskList(relationId);
-
-		/*
-		 * If it is a local placement of a distributed table or a reference table,
-		 * then execute TRUNCATE command locally.
-		 */
-		bool localExecutionSupported = true;
-		ExecuteUtilityTaskList(taskList, localExecutionSupported);
-	}
-
-	PG_RETURN_DATUM(PointerGetDatum(NULL));
-}
-
-
-/*
- * TruncateTaskList returns a list of tasks to execute a TRUNCATE on a
- * distributed table. This is handled separately from other DDL commands
- * because we handle it via the TRUNCATE trigger, which is called whenever
- * a truncate cascades.
- */
-static List *
-TruncateTaskList(Oid relationId)
-{
-	/* resulting task list */
-	List *taskList = NIL;
-
-	/* enumerate the tasks when putting them to the taskList */
-	int taskId = 1;
-
-	Oid schemaId = get_rel_namespace(relationId);
-	char *schemaName = get_namespace_name(schemaId);
-	char *relationName = get_rel_name(relationId);
-
-	List *shardIntervalList = LoadShardIntervalList(relationId);
-
-	/* lock metadata before getting placement lists */
-	LockShardListMetadata(shardIntervalList, ShareLock);
-
-	ShardInterval *shardInterval = NULL;
-	foreach_ptr(shardInterval, shardIntervalList)
-	{
-		uint64 shardId = shardInterval->shardId;
-		char *shardRelationName = pstrdup(relationName);
-
-		/* build shard relation name */
-		AppendShardIdToName(&shardRelationName, shardId);
-
-		char *quotedShardName = quote_qualified_identifier(schemaName, shardRelationName);
-
-		StringInfo shardQueryString = makeStringInfo();
-		appendStringInfo(shardQueryString, "TRUNCATE TABLE %s CASCADE", quotedShardName);
-
-		Task *task = CitusMakeNode(Task);
-		task->jobId = INVALID_JOB_ID;
-		task->taskId = taskId++;
-		task->taskType = DDL_TASK;
-		SetTaskQueryString(task, shardQueryString->data);
-		task->dependentTaskList = NULL;
-		task->replicationModel = REPLICATION_MODEL_INVALID;
-		task->anchorShardId = shardId;
-		task->taskPlacementList = ActiveShardPlacementList(shardId);
-
-		taskList = lappend(taskList, task);
-	}
-
-	return taskList;
-}
-
-
-/*
- * truncate_local_data_after_distributing_table truncates the local records of a distributed table.
- *
- * The main advantage of this function is to truncate all local records after creating a
- * distributed table, and prevent constraints from failing due to outdated local records.
- */
-Datum
-truncate_local_data_after_distributing_table(PG_FUNCTION_ARGS)
-{
-	Oid relationId = PG_GETARG_OID(0);
-
-	CheckCitusVersion(ERROR);
-	EnsureCoordinator();
-	EnsureLocalTableCanBeTruncated(relationId);
-
-	TruncateStmt *truncateStmt = makeNode(TruncateStmt);
-
-	char *relationName = generate_qualified_relation_name(relationId);
-	List *names = stringToQualifiedNameList(relationName);
-	truncateStmt->relations = list_make1(makeRangeVarFromNameList(names));
-	truncateStmt->restart_seqs = false;
-	truncateStmt->behavior = DROP_CASCADE;
-
-	set_config_option("citus.enable_ddl_propagation", "false",
-					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
-					  GUC_ACTION_LOCAL, true, 0, false);
-	ExecuteTruncate(truncateStmt);
-	set_config_option("citus.enable_ddl_propagation", "true",
-					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
-					  GUC_ACTION_LOCAL, true, 0, false);
-
-	PG_RETURN_VOID();
-}
-
-
-/*
- * EnsureLocalTableCanBeTruncated performs the necessary checks to make sure it
- * is safe to truncate the local table of a distributed table
- */
-void
-EnsureLocalTableCanBeTruncated(Oid relationId)
-{
-	/* error out if the relation is not a distributed table */
-	if (!IsCitusTable(relationId))
-	{
-		ereport(ERROR, (errmsg("supplied parameter is not a distributed relation"),
-						errdetail("This UDF only truncates local records of distributed "
-								  "tables.")));
-	}
-
-	/* make sure there are no foreign key references from a local table */
-	SetForeignConstraintRelationshipGraphInvalid();
-	List *referencingRelationList = ReferencingRelationIdList(relationId);
-
-	Oid referencingRelation = InvalidOid;
-	foreach_oid(referencingRelation, referencingRelationList)
-	{
-		/* we do not truncate a table if there is a local table referencing it */
-		if (!IsCitusTable(referencingRelation))
-		{
-			char *referencedRelationName = get_rel_name(relationId);
-			char *referencingRelationName = get_rel_name(referencingRelation);
-
-			ereport(ERROR, (errmsg("cannot truncate a table referenced in a "
-								   "foreign key constraint by a local table"),
-							errdetail("Table \"%s\" references \"%s\"",
-									  referencingRelationName,
-									  referencedRelationName)));
-		}
-	}
-}

src/backend/distributed/metadata/metadata_cache.c

@@ -37,7 +37,7 @@
 #include "distributed/function_utils.h"
 #include "distributed/foreign_key_relationship.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata/pg_dist_object.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/metadata/metadata_sync.c

@@ -32,8 +32,8 @@
 #include "distributed/deparser.h"
 #include "distributed/distribution_column.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/metadata/metadata_utility.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_metadata_utility.c
+ * metadata_utility.c
  *    Routines for reading and modifying master node's metadata.
  *
  * Copyright (c) Citus Data, Inc.
@@ -35,8 +35,8 @@
 #include "distributed/citus_nodes.h"
 #include "distributed/citus_safe_lib.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_logical_optimizer.h"
@@ -317,7 +317,7 @@ ShardIntervalsOnWorkerGroup(WorkerNode *workerNode, Oid relationId)
  * size of multiple tables. Note that, different size functions supported by PG
  * are also supported by this function changing the size query given as the
  * last parameter to function.  Format of sizeQuery is pg_*_size(%s). Examples
- * of it can be found in the master_protocol.h
+ * of it can be found in the coordinator_protocol.h
  */
 StringInfo
 GenerateSizeQueryOnMultiplePlacements(List *shardIntervalList, char *sizeQuery)

src/backend/distributed/metadata/node_metadata.c

@@ -28,8 +28,8 @@
 #include "distributed/commands/utility_hook.h"
 #include "distributed/connection_management.h"
 #include "distributed/maintenanced.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata/distobject.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"

src/backend/distributed/operations/citus_create_restore_point.c

@@ -17,7 +17,7 @@
 #include "catalog/pg_type.h"
 #include "distributed/connection_management.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/remote_commands.h"
 #include "nodes/pg_list.h"

src/backend/distributed/operations/citus_tools.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_citus_tools.c
+ * citus_tools.c
  *	  UDF to run multi shard/worker queries
  *
  * This file contains functions to run commands on other worker/shards.

src/backend/distributed/operations/create_shards.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_create_shards.c
+ * create_shards.c
  *
  * This file contains functions to distribute a table by creating shards for it
  * across a set of worker nodes.
@@ -26,8 +26,8 @@
 #include "catalog/namespace.h"
 #include "catalog/pg_class.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/operations/delete_protocol.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_delete_protocol.c
+ * delete_protocol.c
  *
  * Routine for deleting shards in the distributed cluster. This function takes
  * in a delete command and deletes a shard if and only if all rows in the shard
@@ -33,7 +33,7 @@
 #include "distributed/deparse_shard_query.h"
 #include "distributed/listutils.h"
 #include "distributed/local_executor.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_client_executor.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/operations/modify_multiple_shards.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_modify_multiple_shards.c
+ * modify_multiple_shards.c
  *	  UDF to run multi shard update/delete queries
  *
  * This file contains master_modify_multiple_shards function, which takes a update
@@ -30,8 +30,8 @@
 #include "distributed/citus_ruleutils.h"
 #include "distributed/commands.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_client_executor.h"

src/backend/distributed/operations/node_protocol.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_node_protocol.c
+ * node_protocol.c
  *	  Routines for requesting information from the master node for creating or
  *	  updating shards.
  *
@@ -43,7 +43,7 @@
 #include "distributed/citus_ruleutils.h"
 #include "distributed/commands.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/namespace_utils.h"

src/backend/distributed/operations/repair_shards.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_repair_shards.c
+ * repair_shards.c
  *
  * This file contains functions to repair unhealthy shard placements using data
  * from healthy ones.
@@ -23,7 +23,7 @@
 #include "distributed/connection_management.h"
 #include "distributed/distributed_planner.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/operations/split_shards.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_split_shards.c
+ * split_shards.c
  *
  * This file contains functions to split a shard according to a given
  * distribution column value.
@@ -16,7 +16,7 @@
 
 #include "catalog/pg_class.h"
 #include "distributed/colocation_utils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/operations/stage_protocol.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_stage_protocol.c
+ * stage_protocol.c
  *
  * Routines for staging PostgreSQL table data as shards into the distributed
  * cluster. These user-defined functions are similar to the psql-side \stage
@@ -35,8 +35,8 @@
 #include "distributed/listutils.h"
 #include "distributed/multi_client_executor.h"
 #include "distributed/multi_executor.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_partitioning_utils.h"

src/backend/distributed/planner/distributed_planner.c

@@ -29,7 +29,7 @@
 #include "distributed/intermediate_result_pruning.h"
 #include "distributed/intermediate_results.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/distributed_planner.h"
@@ -38,7 +38,7 @@
 #include "distributed/multi_logical_planner.h"
 #include "distributed/multi_partitioning_utils.h"
 #include "distributed/multi_physical_planner.h"
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "distributed/multi_router_planner.h"
 #include "distributed/query_utils.h"
 #include "distributed/recursive_planning.h"

src/backend/distributed/planner/function_call_delegation.c

@@ -27,8 +27,8 @@
 #include "distributed/function_call_delegation.h"
 #include "distributed/insert_select_planner.h"
 #include "distributed/insert_select_executor.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/multi_physical_planner.h"

src/backend/distributed/planner/merge_planner.c

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * multi_master_planner.c
+ * merge_planner.c
  *	  Routines for building create table and select into table statements on the
  *	  master node.
  *
@@ -20,7 +20,7 @@
 #include "distributed/insert_select_planner.h"
 #include "distributed/listutils.h"
 #include "distributed/metadata_cache.h"
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "distributed/multi_physical_planner.h"
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"

src/backend/distributed/planner/multi_explain.c

@@ -34,7 +34,7 @@
 #include "distributed/multi_explain.h"
 #include "distributed/multi_logical_optimizer.h"
 #include "distributed/multi_logical_planner.h"
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "distributed/multi_physical_planner.h"
 #include "distributed/multi_router_planner.h"
 #include "distributed/distributed_planner.h"

src/backend/distributed/planner/multi_physical_planner.c

@@ -39,7 +39,7 @@
 #include "distributed/citus_ruleutils.h"
 #include "distributed/colocation_utils.h"
 #include "distributed/deparse_shard_query.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_router_planner.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/planner/multi_router_planner.c

@@ -30,8 +30,8 @@
 #include "distributed/log_utils.h"
 #include "distributed/insert_select_planner.h"
 #include "distributed/intermediate_result_pruning.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_executor.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/planner/postgres_planning_functions.c

@@ -15,7 +15,7 @@
 
 #include "distributed/pg_version_constants.h"
 
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "nodes/plannodes.h"
 #if PG_VERSION_NUM >= PG_VERSION_12
 #include "nodes/nodeFuncs.h"

src/backend/distributed/shared_library_init.c

@@ -39,8 +39,8 @@
 #include "distributed/intermediate_result_pruning.h"
 #include "distributed/local_executor.h"
 #include "distributed/maintenanced.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"
@@ -48,7 +48,7 @@
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_logical_optimizer.h"
 #include "distributed/distributed_planner.h"
-#include "distributed/multi_master_planner.h"
+#include "distributed/merge_planner.h"
 #include "distributed/multi_router_planner.h"
 #include "distributed/multi_server_executor.h"
 #include "distributed/pg_dist_partition.h"

src/backend/distributed/test/deparse_shard_query.c

@@ -18,7 +18,7 @@
 
 #include "catalog/pg_type.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/citus_ruleutils.h"
 #include "distributed/insert_select_planner.h"
 #include "distributed/multi_router_planner.h"

src/backend/distributed/test/distribution_metadata.c

@@ -21,8 +21,8 @@
 #include "catalog/pg_type.h"
 #include "distributed/distribution_column.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_physical_planner.h"

src/backend/distributed/test/file_utils.c

@@ -2,7 +2,7 @@
 
 #include "distributed/worker_protocol.h"
 #include "distributed/transmit.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "fmgr.h"
 #include "lib/stringinfo.h"
 

src/backend/distributed/test/prune_shard_list.c

@@ -23,7 +23,7 @@
 #include "catalog/pg_type.h"
 #include "distributed/listutils.h"
 #include "distributed/metadata_cache.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/multi_join_order.h"
 #include "distributed/multi_physical_planner.h"
 #include "distributed/resource_lock.h"

src/backend/distributed/test/run_from_same_connection.c

@@ -19,7 +19,7 @@
 #include "distributed/connection_management.h"
 #include "distributed/function_utils.h"
 #include "distributed/lock_graph.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/remote_commands.h"
 #include "distributed/run_from_same_connection.h"

src/backend/distributed/transaction/citus_dist_stat_activity.c

@@ -24,7 +24,7 @@
 #include "distributed/connection_management.h"
 #include "distributed/listutils.h"
 #include "distributed/lock_graph.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/remote_commands.h"
 #include "distributed/transaction_identifier.h"

src/backend/distributed/utils/citus_outfuncs.c

@@ -30,7 +30,7 @@
 #include "distributed/multi_physical_planner.h"
 #include "distributed/distributed_planner.h"
 #include "distributed/multi_server_executor.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "lib/stringinfo.h"
 #include "nodes/plannodes.h"
 #if PG_VERSION_NUM >= PG_VERSION_12

src/backend/distributed/utils/colocation_utils.c

@@ -21,8 +21,8 @@
 #include "commands/sequence.h"
 #include "distributed/colocation_utils.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_logical_planner.h"

src/backend/distributed/utils/maintenanced.c

@@ -33,7 +33,7 @@
 #include "distributed/citus_safe_lib.h"
 #include "distributed/distributed_deadlock_detection.h"
 #include "distributed/maintenanced.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/statistics_collection.h"

src/backend/distributed/utils/multi_partitioning_utils.c

@@ -17,8 +17,8 @@
 #include "catalog/pg_inherits.h"
 #include "distributed/citus_ruleutils.h"
 #include "distributed/colocation_utils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/multi_partitioning_utils.h"
 #include "distributed/shardinterval_utils.h"
 #include "lib/stringinfo.h"

src/backend/distributed/utils/reference_table_utils.c

@@ -18,8 +18,8 @@
 #include "distributed/colocation_utils.h"
 #include "distributed/commands.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_executor.h"

src/backend/distributed/utils/resource_lock.c

@@ -22,8 +22,8 @@
 #include "commands/tablecmds.h"
 #include "distributed/colocation_utils.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "distributed/multi_join_order.h"

src/backend/distributed/worker/worker_data_fetch_protocol.c

@@ -31,7 +31,7 @@
 #include "distributed/commands/utility_hook.h"
 #include "distributed/connection_management.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_client_executor.h"
 #include "distributed/commands/multi_copy.h"

src/backend/distributed/worker/worker_drop_protocol.c

@@ -21,8 +21,8 @@
 #include "distributed/citus_ruleutils.h"
 #include "distributed/distribution_column.h"
 #include "distributed/listutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/metadata_cache.h"
 #include "foreign/foreign.h"
 #include "utils/builtins.h"

src/backend/distributed/worker/worker_file_access_protocol.c

@@ -16,7 +16,7 @@
 
 #include "commands/defrem.h"
 #include "distributed/listutils.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/worker_protocol.h"
 #include "foreign/foreign.h"
 #include "utils/builtins.h"

src/backend/distributed/worker/worker_shard_visibility.c

@@ -13,7 +13,7 @@
 #include "catalog/namespace.h"
 #include "catalog/pg_class.h"
 #include "distributed/metadata_cache.h"
-#include "distributed/master_protocol.h"
+#include "distributed/coordinator_protocol.h"
 #include "distributed/worker_protocol.h"
 #include "distributed/worker_shard_visibility.h"
 #include "nodes/nodeFuncs.h"

src/backend/distributed/worker/worker_truncate_trigger_protocol.c

@@ -15,7 +15,7 @@
 #include "fmgr.h"
 
 #include "distributed/citus_ruleutils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/metadata_sync.h"
 #include "utils/elog.h"

src/include/distributed/commands/multi_copy.h

@@ -13,7 +13,7 @@
 #define MULTI_COPY_H
 
 
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "nodes/execnodes.h"
 #include "nodes/parsenodes.h"

src/include/distributed/coordinator_protocol.h

@@ -1,18 +1,16 @@
 /*-------------------------------------------------------------------------
  *
- * master_protocol.h
+ * coordinator_protocol.h
- *	  Header for shared declarations for access to master node data. These data
+ *	  Header for shared declarations for access to coordinator node data.
- *	  are used to create new shards or update existing ones.
+ *    These data are used to create new shards or update existing ones.
  *
  * Copyright (c) Citus Data, Inc.
  *
- * $Id$
- *
  *-------------------------------------------------------------------------
  */
 
-#ifndef MASTER_PROTOCOL_H
+#ifndef COORDINATOR_PROTOCOL_H
-#define MASTER_PROTOCOL_H
+#define COORDINATOR_PROTOCOL_H
 
 #include "postgres.h"
 #include "c.h"
@@ -21,7 +19,7 @@
 #include "distributed/connection_management.h"
 #include "distributed/shardinterval_utils.h"
 #include "nodes/pg_list.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 
 
 /*
@@ -176,4 +174,4 @@ extern ShardPlacement * ForceSearchShardPlacementInList(List *shardPlacementList
 														const char *nodeName,
 														uint32 nodePort);
 
-#endif   /* MASTER_PROTOCOL_H */
+#endif   /* COORDINATOR_PROTOCOL_H */

src/include/distributed/merge_planner.h

@@ -1,18 +1,16 @@
 /*-------------------------------------------------------------------------
  *
- * multi_master_planner.h
+ * merge_planner.h
  *	  Function declarations for building planned statements; these statements
- *	  are then executed on the master node.
+ *	  are then executed on the coordinator node.
  *
  * Copyright (c) Citus Data, Inc.
  *
- * $Id$
- *
  *-------------------------------------------------------------------------
  */
 
-#ifndef MULTI_MASTER_PLANNER_H
+#ifndef MERGE_PLANNER_H
-#define MULTI_MASTER_PLANNER_H
+#define MERGE_PLANNER_H
 
 #include "lib/stringinfo.h"
 #include "nodes/parsenodes.h"
@@ -37,4 +35,4 @@ extern Unique * make_unique_from_sortclauses(Plan *lefttree, List *distinctList)
 extern bool ReplaceCitusExtraDataContainer;
 extern CustomScan *ReplaceCitusExtraDataContainerWithCustomScan;
 
-#endif   /* MULTI_MASTER_PLANNER_H */
+#endif   /* MERGE_PLANNER_H */

src/include/distributed/metadata_cache.h

@@ -14,7 +14,7 @@
 #include "postgres.h"
 
 #include "fmgr.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/pg_dist_partition.h"
 #include "distributed/worker_manager.h"
 #include "utils/hsearch.h"

src/include/distributed/metadata_utility.h

@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * master_metadata_utility.h
+ * metadata_utility.h
  *	  Type and function declarations used for reading and modifying master
  *    node's metadata.
  *
@@ -11,8 +11,8 @@
  *-------------------------------------------------------------------------
  */
 
-#ifndef MASTER_METADATA_UTILITY_H
+#ifndef METADATA_UTILITY_H
-#define MASTER_METADATA_UTILITY_H
+#define METADATA_UTILITY_H
 
 #include "postgres.h"
 
@@ -168,4 +168,4 @@ extern ShardInterval * DeformedDistShardTupleToShardInterval(Datum *datumArray,
 extern void GetIntervalTypeInfo(char partitionMethod, Var *partitionColumn,
 								Oid *intervalTypeId, int32 *intervalTypeMod);
 
-#endif   /* MASTER_METADATA_UTILITY_H */
+#endif   /* METADATA_UTILITY_H */

src/include/distributed/multi_logical_optimizer.h

@@ -14,7 +14,7 @@
 #ifndef MULTI_LOGICAL_OPTIMIZER_H
 #define MULTI_LOGICAL_OPTIMIZER_H
 
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/multi_logical_planner.h"
 #include "distributed/relation_restriction_equivalence.h"
 

src/include/distributed/multi_partitioning_utils.h

@@ -8,7 +8,7 @@
 #define MULTI_PARTITIONING_UTILS_H_
 
 
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "nodes/pg_list.h"
 
 

src/include/distributed/multi_physical_planner.h

@@ -24,7 +24,7 @@
 #include "distributed/citus_nodes.h"
 #include "distributed/errormessage.h"
 #include "distributed/log_utils.h"
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/worker_manager.h"
 #include "distributed/multi_logical_planner.h"
 #include "distributed/distributed_planner.h"

src/include/distributed/relation_access_tracking.h

@@ -9,7 +9,7 @@
 #ifndef RELATION_ACCESS_TRACKING_H_
 #define RELATION_ACCESS_TRACKING_H_
 
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/multi_physical_planner.h" /* access Task struct */
 #include "distributed/placement_connection.h"
 

src/include/distributed/shardinterval_utils.h

@@ -12,7 +12,7 @@
 #ifndef SHARDINTERVAL_UTILS_H_
 #define SHARDINTERVAL_UTILS_H_
 
-#include "distributed/master_metadata_utility.h"
+#include "distributed/metadata_utility.h"
 #include "distributed/metadata_cache.h"
 #include "nodes/primnodes.h"