Merge pull request #5923 from citusdata/update_view

Mark existing views as distributed when upgrade to 11.0+

src/backend/distributed/commands/dependencies.c

@@ -166,11 +166,28 @@ EnsureDependenciesCanBeDistributed(const ObjectAddress *objectAddress)
 
 
 /*
- * ErrorIfCircularDependencyExists checks whether given object has circular dependency
+ * ErrorIfCircularDependencyExists is a wrapper around
- * with itself via existing objects of pg_dist_object.
+ * DeferErrorIfCircularDependencyExists(), and throws error
+ * if circular dependency exists.
  */
 static void
 ErrorIfCircularDependencyExists(const ObjectAddress *objectAddress)
+{
+	DeferredErrorMessage *depError =
+		DeferErrorIfCircularDependencyExists(objectAddress);
+	if (depError != NULL)
+	{
+		RaiseDeferredError(depError, ERROR);
+	}
+}
+
+
+/*
+ * DeferErrorIfCircularDependencyExists checks whether given object has
+ * circular dependency with itself via existing objects of pg_dist_object.
+ */
+DeferredErrorMessage *
+DeferErrorIfCircularDependencyExists(const ObjectAddress *objectAddress)
 {
 	List *dependencies = GetAllSupportedDependenciesForObject(objectAddress);
 
@@ -189,13 +206,18 @@ ErrorIfCircularDependencyExists(const ObjectAddress *objectAddress)
 			objectDescription = getObjectDescription(objectAddress);
 			#endif
 
-			ereport(ERROR, (errmsg("Citus can not handle circular dependencies "
+			StringInfo detailInfo = makeStringInfo();
-								   "between distributed objects"),
+			appendStringInfo(detailInfo, "\"%s\" circularly depends itself, resolve "
-							errdetail("\"%s\" circularly depends itself, resolve "
+										 "circular dependency first", objectDescription);
-									  "circular dependency first",
+
-									  objectDescription)));
+			return DeferredError(ERRCODE_FEATURE_NOT_SUPPORTED,
+								 "Citus can not handle circular dependencies "
+								 "between distributed objects", detailInfo->data,
+								 NULL);
 		}
 	}
+
+	return NULL;
 }
 
 

src/backend/distributed/commands/extension.c

@@ -10,6 +10,7 @@
 
 #include "postgres.h"
 
+#include "access/genam.h"
 #include "citus_version.h"
 #include "catalog/pg_extension_d.h"
 #include "commands/defrem.h"
@@ -37,6 +38,8 @@ static void AddSchemaFieldIfMissing(CreateExtensionStmt *stmt);
 static List * FilterDistributedExtensions(List *extensionObjectList);
 static List * ExtensionNameListToObjectAddressList(List *extensionObjectList);
 static void MarkExistingObjectDependenciesDistributedIfSupported(void);
+static List * GetAllViews(void);
+static bool ShouldMarkRelationDistributedOnUpgrade(Oid relationId);
 static bool ShouldPropagateExtensionCommand(Node *parseTree);
 static bool IsAlterExtensionSetSchemaCitus(Node *parseTree);
 static Node * RecreateExtensionStmt(Oid extensionOid);
@@ -510,27 +513,78 @@ MarkExistingObjectDependenciesDistributedIfSupported()
 	Oid citusTableId = InvalidOid;
 	foreach_oid(citusTableId, citusTableIdList)
 	{
-		ObjectAddress tableAddress = { 0 };
+		if (!ShouldMarkRelationDistributedOnUpgrade(citusTableId))
-		ObjectAddressSet(tableAddress, RelationRelationId, citusTableId);
+		{
+			continue;
+		}
 
 		/* refrain reading the metadata cache for all tables */
 		if (ShouldSyncTableMetadataViaCatalog(citusTableId))
 		{
-			/* we need to pass pointer allocated in the heap */
+			ObjectAddress tableAddress = { 0 };
-			ObjectAddress *addressPointer = palloc0(sizeof(ObjectAddress));
+			ObjectAddressSet(tableAddress, RelationRelationId, citusTableId);
-			*addressPointer = tableAddress;
 
-			/* as of Citus 11, tables that should be synced are also considered object */
+			/*
-			resultingObjectAddresses = lappend(resultingObjectAddresses, addressPointer);
+			 * We mark tables distributed immediately because we also need to mark
+			 * views as distributed. We check whether the views that depend on
+			 * the table has any auto-distirbutable dependencies below. Citus
+			 * currently cannot "auto" distribute tables as dependencies, so we
+			 * mark them distributed immediately.
+			 */
+			MarkObjectDistributedLocally(&tableAddress);
+
+			/*
+			 * All the distributable dependencies of a table should be marked as
+			 * distributed.
+			 */
+			List *distributableDependencyObjectAddresses =
+				GetDistributableDependenciesForObject(&tableAddress);
+
+			resultingObjectAddresses =
+				list_concat(resultingObjectAddresses,
+							distributableDependencyObjectAddresses);
+		}
+	}
+
+	/*
+	 * As of Citus 11, views on Citus tables that do not have any unsupported
+	 * dependency should also be distributed.
+	 *
+	 * In general, we mark views distributed as long as it does not have
+	 * any unsupported dependencies.
+	 */
+	List *viewList = GetAllViews();
+	Oid viewOid = InvalidOid;
+	foreach_oid(viewOid, viewList)
+	{
+		if (!ShouldMarkRelationDistributedOnUpgrade(viewOid))
+		{
+			continue;
 		}
 
-		List *distributableDependencyObjectAddresses =
+		ObjectAddress viewAddress = { 0 };
-			GetDistributableDependenciesForObject(&tableAddress);
+		ObjectAddressSet(viewAddress, RelationRelationId, viewOid);
 
-		resultingObjectAddresses = list_concat(resultingObjectAddresses,
+		/*
-											   distributableDependencyObjectAddresses);
+		 * If a view depends on multiple views, that view will be marked
+		 * as distributed while it is processed for the last view
+		 * table.
+		 */
+		MarkObjectDistributedLocally(&viewAddress);
+
+		/* we need to pass pointer allocated in the heap */
+		ObjectAddress *addressPointer = palloc0(sizeof(ObjectAddress));
+		*addressPointer = viewAddress;
+
+		List *distributableDependencyObjectAddresses =
+			GetDistributableDependenciesForObject(&viewAddress);
+
+		resultingObjectAddresses =
+			list_concat(resultingObjectAddresses,
+						distributableDependencyObjectAddresses);
 	}
 
+
 	/* resolve dependencies of the objects in pg_dist_object*/
 	List *distributedObjectAddressList = GetDistributedObjectAddressList();
 
@@ -566,6 +620,85 @@ MarkExistingObjectDependenciesDistributedIfSupported()
 }
 
 
+/*
+ * GetAllViews returns list of view oids that exists on this server.
+ */
+static List *
+GetAllViews(void)
+{
+	List *viewOidList = NIL;
+
+	Relation pgClass = table_open(RelationRelationId, AccessShareLock);
+
+	SysScanDesc scanDescriptor = systable_beginscan(pgClass, InvalidOid, false, NULL,
+													0, NULL);
+
+	HeapTuple heapTuple = systable_getnext(scanDescriptor);
+	while (HeapTupleIsValid(heapTuple))
+	{
+		Form_pg_class relationForm = (Form_pg_class) GETSTRUCT(heapTuple);
+
+		/* we're only interested in views */
+		if (relationForm->relkind == RELKIND_VIEW)
+		{
+			viewOidList = lappend_oid(viewOidList, relationForm->oid);
+		}
+
+		heapTuple = systable_getnext(scanDescriptor);
+	}
+
+	systable_endscan(scanDescriptor);
+	table_close(pgClass, NoLock);
+
+	return viewOidList;
+}
+
+
+/*
+ * ShouldMarkRelationDistributedOnUpgrade is a helper function that
+ * decides whether the input relation should be marked as distributed
+ * during the upgrade.
+ */
+static bool
+ShouldMarkRelationDistributedOnUpgrade(Oid relationId)
+{
+	if (!EnableMetadataSync)
+	{
+		/*
+		 * Just in case anything goes wrong, we should still be able
+		 * to continue to the version upgrade.
+		 */
+		return false;
+	}
+
+	ObjectAddress relationAddress = { 0 };
+	ObjectAddressSet(relationAddress, RelationRelationId, relationId);
+
+	bool pgObject = (relationId < FirstNormalObjectId);
+	bool ownedByExtension = IsTableOwnedByExtension(relationId);
+	bool alreadyDistributed = IsObjectDistributed(&relationAddress);
+	bool hasUnsupportedDependency =
+		DeferErrorIfHasUnsupportedDependency(&relationAddress) != NULL;
+	bool hasCircularDependency =
+		DeferErrorIfCircularDependencyExists(&relationAddress) != NULL;
+
+	/*
+	 * pgObject: Citus never marks pg objects as distributed
+	 * ownedByExtension: let extensions manage its own objects
+	 * alreadyDistributed: most likely via earlier versions
+	 * hasUnsupportedDependency: Citus doesn't know how to distribute its dependencies
+	 * hasCircularDependency: Citus cannot handle circular dependencies
+	 */
+	if (pgObject || ownedByExtension || alreadyDistributed ||
+		hasUnsupportedDependency || hasCircularDependency)
+	{
+		return false;
+	}
+
+	return true;
+}
+
+
 /*
  * PreprocessAlterExtensionContentsStmt issues a notice. It does not propagate.
  */

src/backend/distributed/metadata/distobject.c

@@ -46,7 +46,6 @@
 #include "utils/rel.h"
 
 
-static void MarkObjectDistributedLocally(const ObjectAddress *distAddress);
 static char * CreatePgDistObjectEntryCommand(const ObjectAddress *objectAddress);
 static int ExecuteCommandAsSuperuser(char *query, int paramCount, Oid *paramTypes,
 									 Datum *paramValues);
@@ -195,7 +194,7 @@ MarkObjectDistributedViaSuperUser(const ObjectAddress *distAddress)
  * This function should never be called alone, MarkObjectDistributed() or
  * MarkObjectDistributedViaSuperUser() should be called.
  */
-static void
+void
 MarkObjectDistributedLocally(const ObjectAddress *distAddress)
 {
 	int paramCount = 3;

src/backend/distributed/metadata/metadata_cache.c

@@ -152,6 +152,7 @@ typedef struct MetadataCacheData
 	Oid distShardShardidIndexId;
 	Oid distPlacementShardidIndexId;
 	Oid distPlacementPlacementidIndexId;
+	Oid distColocationidIndexId;
 	Oid distPlacementGroupidIndexId;
 	Oid distTransactionRelationId;
 	Oid distTransactionGroupIndexId;
@@ -2506,6 +2507,17 @@ DistPlacementPlacementidIndexId(void)
 }
 
 
+/* return oid of pg_dist_colocation_pkey */
+Oid
+DistColocationIndexId(void)
+{
+	CachedRelationLookup("pg_dist_colocation_pkey",
+						 &MetadataCache.distColocationidIndexId);
+
+	return MetadataCache.distColocationidIndexId;
+}
+
+
 /* return oid of pg_dist_transaction relation */
 Oid
 DistTransactionRelationId(void)

src/backend/distributed/metadata/metadata_sync.c

@@ -3411,12 +3411,19 @@ ColocationGroupCreateCommandList(void)
 					 "distributioncolumncollationschema)  AS (VALUES ");
 
 	Relation pgDistColocation = table_open(DistColocationRelationId(), AccessShareLock);
+	Relation colocationIdIndexRel = index_open(DistColocationIndexId(), AccessShareLock);
 
-	bool indexOK = false;
+	/*
-	SysScanDesc scanDescriptor = systable_beginscan(pgDistColocation, InvalidOid, indexOK,
+	 * It is not strictly necessary to read the tuples in order.
-													NULL, 0, NULL);
+	 * However, it is useful to get consistent behavior, both for regression
+	 * tests and also in production systems.
+	 */
+	SysScanDesc scanDescriptor =
+		systable_beginscan_ordered(pgDistColocation, colocationIdIndexRel,
+								   NULL, 0, NULL);
 
-	HeapTuple colocationTuple = systable_getnext(scanDescriptor);
+	HeapTuple colocationTuple = systable_getnext_ordered(scanDescriptor,
+														 ForwardScanDirection);
 
 	while (HeapTupleIsValid(colocationTuple))
 	{
@@ -3474,10 +3481,11 @@ ColocationGroupCreateCommandList(void)
 							 "NULL, NULL)");
 		}
 
-		colocationTuple = systable_getnext(scanDescriptor);
+		colocationTuple = systable_getnext_ordered(scanDescriptor, ForwardScanDirection);
 	}
 
-	systable_endscan(scanDescriptor);
+	systable_endscan_ordered(scanDescriptor);
+	index_close(colocationIdIndexRel, AccessShareLock);
 	table_close(pgDistColocation, AccessShareLock);
 
 	if (!hasColocations)

src/include/distributed/metadata/distobject.h

@@ -24,6 +24,7 @@ extern bool IsObjectDistributed(const ObjectAddress *address);
 extern bool ClusterHasDistributedFunctionWithDistArgument(void);
 extern void MarkObjectDistributed(const ObjectAddress *distAddress);
 extern void MarkObjectDistributedViaSuperUser(const ObjectAddress *distAddress);
+extern void MarkObjectDistributedLocally(const ObjectAddress *distAddress);
 extern void UnmarkObjectDistributed(const ObjectAddress *address);
 extern bool IsTableOwnedByExtension(Oid relationId);
 extern bool IsObjectAddressOwnedByExtension(const ObjectAddress *target,

src/include/distributed/metadata_cache.h

@@ -238,6 +238,7 @@ extern Oid DistShardLogicalRelidIndexId(void);
 extern Oid DistShardShardidIndexId(void);
 extern Oid DistPlacementShardidIndexId(void);
 extern Oid DistPlacementPlacementidIndexId(void);
+extern Oid DistColocationIndexId(void);
 extern Oid DistTransactionRelationId(void);
 extern Oid DistTransactionGroupIndexId(void);
 extern Oid DistPlacementGroupidIndexId(void);

src/include/distributed/metadata_utility.h

@@ -23,6 +23,7 @@
 #include "catalog/objectaddress.h"
 #include "distributed/citus_nodes.h"
 #include "distributed/connection_management.h"
+#include "distributed/errormessage.h"
 #include "distributed/relay_utility.h"
 #include "utils/acl.h"
 #include "utils/relcache.h"
@@ -258,6 +259,9 @@ extern void CreateTruncateTrigger(Oid relationId);
 extern TableConversionReturn * UndistributeTable(TableConversionParameters *params);
 
 extern void EnsureDependenciesExistOnAllNodes(const ObjectAddress *target);
+extern DeferredErrorMessage * DeferErrorIfCircularDependencyExists(const
+																   ObjectAddress *
+																   objectAddress);
 extern List * GetDistributableDependenciesForObject(const ObjectAddress *target);
 extern bool ShouldPropagate(void);
 extern bool ShouldPropagateCreateInCoordinatedTransction(void);

src/test/regress/expected/upgrade_post_11_after.out

@@ -9,24 +9,37 @@ NOTICE:  Preparing to sync the metadata to all nodes
  t
 (1 row)
 
--- tables are objects with Citus 11+
+-- tables, views and their dependencies become objects with Citus 11+
-SELECT pg_identify_object_as_address(classid, objid, objsubid) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype) ORDER BY 1;
+SELECT pg_identify_object_as_address(classid, objid, objsubid) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype, 'post_11_upgrade.employees'::regclass, 'post_11_upgrade.view_for_upgrade_test'::regclass, 'post_11_upgrade.my_type_for_view'::regtype, 'post_11_upgrade.view_for_upgrade_test_my_type'::regclass, 'post_11_upgrade.non_dist_table_for_view'::regclass, 'post_11_upgrade.non_dist_upgrade_test_view'::regclass, 'post_11_upgrade.non_dist_upgrade_test_view_local_join'::regclass, 'post_11_upgrade.non_dist_upgrade_multiple_dist_view'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view_2'::regclass, 'post_11_upgrade.reporting_line'::regclass, 'post_11_upgrade.v_test_1'::regclass, 'post_11_upgrade.v_test_2'::regclass, 'post_11_upgrade.owned_by_extension_table'::regclass, 'post_11_upgrade.materialized_view'::regclass, 'post_11_upgrade.owned_by_extension_view'::regclass, 'post_11_upgrade.local_type'::regtype, 'post_11_upgrade.non_dist_dist_table_for_view'::regclass, 'post_11_upgrade.depends_on_nothing_1'::regclass, 'post_11_upgrade.depends_on_nothing_2'::regclass, 'post_11_upgrade.depends_on_pg'::regclass, 'post_11_upgrade.depends_on_citus'::regclass, 'post_11_upgrade.depends_on_seq'::regclass, 'post_11_upgrade.depends_on_seq_and_no_support'::regclass) ORDER BY 1;
                          pg_identify_object_as_address
 ---------------------------------------------------------------------
  (function,"{post_11_upgrade,func_in_transaction_def}",{})
  (schema,{post_11_upgrade},{})
+ (table,"{post_11_upgrade,employees}",{})
  (table,"{post_11_upgrade,part_table}",{})
  (table,"{post_11_upgrade,sensors}",{})
  ("text search configuration","{post_11_upgrade,partial_index_test_config}",{})
  (type,{post_11_upgrade.my_type},{})
-(6 rows)
+ (type,{post_11_upgrade.my_type_for_view},{})
+ (view,"{post_11_upgrade,depends_on_citus}",{})
+ (view,"{post_11_upgrade,depends_on_nothing_1}",{})
+ (view,"{post_11_upgrade,depends_on_nothing_2}",{})
+ (view,"{post_11_upgrade,depends_on_pg}",{})
+ (view,"{post_11_upgrade,depends_on_seq}",{})
+ (view,"{post_11_upgrade,non_dist_upgrade_multiple_dist_view}",{})
+ (view,"{post_11_upgrade,non_dist_upgrade_ref_view}",{})
+ (view,"{post_11_upgrade,non_dist_upgrade_ref_view_2}",{})
+ (view,"{post_11_upgrade,reporting_line}",{})
+ (view,"{post_11_upgrade,view_for_upgrade_test}",{})
+ (view,"{post_11_upgrade,view_for_upgrade_test_my_type}",{})
+(19 rows)
 
 -- on all nodes
-SELECT run_command_on_workers($$SELECT array_agg(pg_identify_object_as_address(classid, objid, objsubid)) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype) ORDER BY 1;$$) ORDER BY 1;
+SELECT run_command_on_workers($$SELECT array_agg(pg_identify_object_as_address(classid, objid, objsubid)) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype, 'post_11_upgrade.view_for_upgrade_test'::regclass, 'post_11_upgrade.view_for_upgrade_test_my_type'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view_2'::regclass, 'post_11_upgrade.reporting_line'::regclass) ORDER BY 1;$$) ORDER BY 1;
-                                                                                                                                        run_command_on_workers
+                                                                                                                                                                                                                                                                                                          run_command_on_workers
 ---------------------------------------------------------------------
- (localhost,57636,t,"{""(type,{post_11_upgrade.my_type},{})"",""(function,\\""{post_11_upgrade,func_in_transaction_def}\\"",{})"",""(table,\\""{post_11_upgrade,part_table}\\"",{})"",""(table,\\""{post_11_upgrade,sensors}\\"",{})"",""(schema,{post_11_upgrade},{})"",""(\\""text search configuration\\"",\\""{post_11_upgrade,partial_index_test_config}\\"",{})""}")
+ (localhost,57636,t,"{""(type,{post_11_upgrade.my_type},{})"",""(function,\\""{post_11_upgrade,func_in_transaction_def}\\"",{})"",""(table,\\""{post_11_upgrade,part_table}\\"",{})"",""(table,\\""{post_11_upgrade,sensors}\\"",{})"",""(view,\\""{post_11_upgrade,view_for_upgrade_test}\\"",{})"",""(view,\\""{post_11_upgrade,view_for_upgrade_test_my_type}\\"",{})"",""(view,\\""{post_11_upgrade,non_dist_upgrade_ref_view_2}\\"",{})"",""(view,\\""{post_11_upgrade,reporting_line}\\"",{})"",""(schema,{post_11_upgrade},{})"",""(\\""text search configuration\\"",\\""{post_11_upgrade,partial_index_test_config}\\"",{})""}")
- (localhost,57637,t,"{""(type,{post_11_upgrade.my_type},{})"",""(function,\\""{post_11_upgrade,func_in_transaction_def}\\"",{})"",""(table,\\""{post_11_upgrade,part_table}\\"",{})"",""(table,\\""{post_11_upgrade,sensors}\\"",{})"",""(schema,{post_11_upgrade},{})"",""(\\""text search configuration\\"",\\""{post_11_upgrade,partial_index_test_config}\\"",{})""}")
+ (localhost,57637,t,"{""(type,{post_11_upgrade.my_type},{})"",""(function,\\""{post_11_upgrade,func_in_transaction_def}\\"",{})"",""(table,\\""{post_11_upgrade,part_table}\\"",{})"",""(table,\\""{post_11_upgrade,sensors}\\"",{})"",""(view,\\""{post_11_upgrade,view_for_upgrade_test}\\"",{})"",""(view,\\""{post_11_upgrade,view_for_upgrade_test_my_type}\\"",{})"",""(view,\\""{post_11_upgrade,non_dist_upgrade_ref_view_2}\\"",{})"",""(view,\\""{post_11_upgrade,reporting_line}\\"",{})"",""(schema,{post_11_upgrade},{})"",""(\\""text search configuration\\"",\\""{post_11_upgrade,partial_index_test_config}\\"",{})""}")
 (2 rows)
 
 -- Create the necessary test utility function
@@ -68,7 +81,9 @@ UNION
 			EXCEPT
 		SELECT unnest(activate_node_snapshot()) as command
 	)
-) AS foo WHERE command NOT ILIKE '%distributed_object_data%';
+) AS foo WHERE command NOT ILIKE '%distributed_object_data%' and
+-- sequences differ per node, so exclude
+command NOT ILIKE '%sequence%';
  same_metadata_in_workers
 ---------------------------------------------------------------------
  t

src/test/regress/expected/upgrade_post_11_before.out

@@ -114,6 +114,42 @@ INSERT INTO reference_table SELECT i FROM generate_series(0,1000)i;
 INSERT INTO colocated_dist_table SELECT i FROM generate_series(0,1000)i;
 INSERT INTO colocated_partitioned_table SELECT i, '2020-01-05' FROM generate_series(0,1000)i;
 INSERT INTO sensors SELECT i, '2020-01-05', '{}' FROM generate_series(0,1000)i;
+-- table for recursive view
+CREATE TABLE employees (employee_id int, manager_id int, full_name text);
+SELECT create_distributed_table('employees', 'employee_id');
+ create_distributed_table
+---------------------------------------------------------------------
+
+(1 row)
+
+-- table for owned_by_extension
+-- note that tables owned by extension are
+-- not added to the pg_dist_object, and assumed
+-- to exists on all nodes via the extension
+CREATE TABLE owned_by_extension_table (employee_id int, manager_id int, full_name text);
+ALTER EXTENSION plpgsql ADD TABLE post_11_upgrade.owned_by_extension_table;
+NOTICE:  Citus does not propagate adding/dropping member objects
+HINT:  You can add/drop the member objects on the workers as well.
+SELECT create_distributed_table('owned_by_extension_table', 'employee_id');
+ create_distributed_table
+---------------------------------------------------------------------
+
+(1 row)
+
+SELECT run_command_on_workers($$CREATE TABLE post_11_upgrade.owned_by_extension_table (employee_id int, manager_id int, full_name text);$$);
+       run_command_on_workers
+---------------------------------------------------------------------
+ (localhost,57636,t,"CREATE TABLE")
+ (localhost,57637,t,"CREATE TABLE")
+(2 rows)
+
+SELECT run_command_on_workers($$ALTER EXTENSION plpgsql ADD TABLE post_11_upgrade.owned_by_extension_table;$$);
+        run_command_on_workers
+---------------------------------------------------------------------
+ (localhost,57636,t,"ALTER EXTENSION")
+ (localhost,57637,t,"ALTER EXTENSION")
+(2 rows)
+
 SET citus.enable_ddl_propagation TO off;
 CREATE TEXT SEARCH CONFIGURATION post_11_upgrade.partial_index_test_config ( parser = default );
 SELECT 1 FROM run_command_on_workers($$CREATE TEXT SEARCH CONFIGURATION post_11_upgrade.partial_index_test_config ( parser = default );$$);
@@ -147,6 +183,72 @@ $$;');
 (2 rows)
 
 CREATE TYPE post_11_upgrade.my_type AS (a int);
+CREATE VIEW post_11_upgrade.view_for_upgrade_test AS SELECT * FROM sensors;
+-- one normally would not need views on the workers pre-11, but still
+-- nice test to have
+SELECT run_command_on_workers('SET citus.enable_ddl_propagation TO off;
+CREATE VIEW post_11_upgrade.view_for_upgrade_test AS SELECT * FROM sensors;');
+ run_command_on_workers
+---------------------------------------------------------------------
+ (localhost,57636,t,SET)
+ (localhost,57637,t,SET)
+(2 rows)
+
+-- a non-distributed type dependency to a view
+-- both the view and the type should be distributed after the upgrade
+CREATE TYPE post_11_upgrade.my_type_for_view AS (a int);
+CREATE VIEW post_11_upgrade.view_for_upgrade_test_my_type (casted) AS SELECT row(measureid)::post_11_upgrade.my_type_for_view FROM sensors;
+-- a local type, table and view, should not be distributed
+-- after the upgrade
+CREATE TYPE post_11_upgrade.local_type AS (a int);
+CREATE TABLE post_11_upgrade.non_dist_table_for_view(a int, b post_11_upgrade.local_type);
+CREATE VIEW post_11_upgrade.non_dist_upgrade_test_view AS SELECT * FROM non_dist_table_for_view;
+-- a local table joined with a distributed table. In other words, the view has a local table dependency
+-- and should not be distributed after the upgrade
+CREATE TABLE post_11_upgrade.non_dist_dist_table_for_view(a int);
+CREATE VIEW post_11_upgrade.non_dist_upgrade_test_view_local_join AS SELECT * FROM non_dist_table_for_view JOIN sensors ON (true);
+-- a view selecting from multiple
+-- distributed/reference tables should be marked as distributed
+CREATE VIEW post_11_upgrade.non_dist_upgrade_multiple_dist_view AS SELECT colocated_dist_table.* FROM colocated_dist_table JOIN sensors ON (true) JOIN reference_table ON (true);
+-- a view selecting from reference table should be fine
+CREATE VIEW post_11_upgrade.non_dist_upgrade_ref_view AS SELECT * FROM reference_table;
+-- a view selecting from another (distributed) view should also be distributed
+CREATE VIEW post_11_upgrade.non_dist_upgrade_ref_view_2 AS SELECT * FROM non_dist_upgrade_ref_view;
+-- materialized views never becomes distributed
+CREATE MATERIALIZED VIEW post_11_upgrade.materialized_view AS SELECT * FROM reference_table;
+CREATE VIEW post_11_upgrade.owned_by_extension_view AS SELECT * FROM reference_table;
+ALTER EXTENSION plpgsql ADD VIEW post_11_upgrade.owned_by_extension_view;
+-- temporary views should not be marked as distributed
+CREATE VIEW pg_temp.temp_view_1 AS SELECT * FROM reference_table;
+CREATE temporary VIEW temp_view_2 AS SELECT * FROM reference_table;
+-- we should be able to distribute recursive views
+CREATE OR REPLACE RECURSIVE VIEW reporting_line (employee_id, subordinates) AS
+SELECT employee_id,
+       full_name AS subordinates
+FROM employees
+WHERE manager_id IS NULL
+UNION ALL
+SELECT e.employee_id,
+       (rl.subordinates || ' > ' || e.full_name) AS subordinates
+FROM employees e
+INNER JOIN reporting_line rl ON e.manager_id = rl.employee_id;
+-- v_test_1 and v_test_2 becomes circularly dependend views
+-- so we should not try to distribute any of the views
+CREATE VIEW post_11_upgrade.v_test_1 AS SELECT * FROM sensors;
+CREATE VIEW post_11_upgrade.v_test_2 AS SELECT * FROM sensors;
+CREATE OR REPLACE VIEW post_11_upgrade.v_test_1 AS SELECT sensors.* FROM sensors JOIN v_test_2 USING (measureid);
+CREATE OR REPLACE VIEW post_11_upgrade.v_test_2 AS SELECT sensors.* FROM sensors JOIN v_test_1 USING (measureid);
+-- views that do not depeend on anything should be distributed
+CREATE VIEW post_11_upgrade.depends_on_nothing_1 AS SELECT * FROM (VALUES (1)) as values;
+CREATE VIEW post_11_upgrade.depends_on_nothing_2 AS SELECT 1;
+-- views depends pg/citus objects should be distributed
+CREATE VIEW post_11_upgrade.depends_on_pg AS SELECT * FROM pg_class;
+CREATE VIEW post_11_upgrade.depends_on_citus AS SELECT * FROM pg_dist_partition;
+-- views depend on sequences only should be distributed
+CREATE SEQUENCE post_11_upgrade.seq_bigint AS bigint INCREMENT BY 3 CACHE 10 CYCLE;
+CREATE VIEW post_11_upgrade.depends_on_seq AS SELECT nextval('post_11_upgrade.seq_bigint');
+-- views depend on a sequence and a local table should not be distributed
+CREATE VIEW post_11_upgrade.depends_on_seq_and_no_support AS SELECT nextval('post_11_upgrade.seq_bigint') FROM post_11_upgrade.non_dist_table_for_view;
 RESET citus.enable_ddl_propagation;
 CREATE TABLE sensors_parser(
     measureid integer,

src/test/regress/sql/upgrade_post_11_after.sql

@@ -4,11 +4,11 @@ SET search_path = post_11_upgrade;
 UPDATE pg_dist_node_metadata SET metadata=jsonb_set(metadata, '{partitioned_citus_table_exists_pre_11}', to_jsonb('true'::bool), true);
 SELECT citus_finalize_upgrade_to_citus11(enforce_version_check:=false);
 
--- tables are objects with Citus 11+
+-- tables, views and their dependencies become objects with Citus 11+
-SELECT pg_identify_object_as_address(classid, objid, objsubid) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype) ORDER BY 1;
+SELECT pg_identify_object_as_address(classid, objid, objsubid) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype, 'post_11_upgrade.employees'::regclass, 'post_11_upgrade.view_for_upgrade_test'::regclass, 'post_11_upgrade.my_type_for_view'::regtype, 'post_11_upgrade.view_for_upgrade_test_my_type'::regclass, 'post_11_upgrade.non_dist_table_for_view'::regclass, 'post_11_upgrade.non_dist_upgrade_test_view'::regclass, 'post_11_upgrade.non_dist_upgrade_test_view_local_join'::regclass, 'post_11_upgrade.non_dist_upgrade_multiple_dist_view'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view_2'::regclass, 'post_11_upgrade.reporting_line'::regclass, 'post_11_upgrade.v_test_1'::regclass, 'post_11_upgrade.v_test_2'::regclass, 'post_11_upgrade.owned_by_extension_table'::regclass, 'post_11_upgrade.materialized_view'::regclass, 'post_11_upgrade.owned_by_extension_view'::regclass, 'post_11_upgrade.local_type'::regtype, 'post_11_upgrade.non_dist_dist_table_for_view'::regclass, 'post_11_upgrade.depends_on_nothing_1'::regclass, 'post_11_upgrade.depends_on_nothing_2'::regclass, 'post_11_upgrade.depends_on_pg'::regclass, 'post_11_upgrade.depends_on_citus'::regclass, 'post_11_upgrade.depends_on_seq'::regclass, 'post_11_upgrade.depends_on_seq_and_no_support'::regclass) ORDER BY 1;
 
 -- on all nodes
-SELECT run_command_on_workers($$SELECT array_agg(pg_identify_object_as_address(classid, objid, objsubid)) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype) ORDER BY 1;$$) ORDER BY 1;
+SELECT run_command_on_workers($$SELECT array_agg(pg_identify_object_as_address(classid, objid, objsubid)) FROM pg_catalog.pg_dist_object WHERE objid IN ('post_11_upgrade'::regnamespace, 'post_11_upgrade.part_table'::regclass, 'post_11_upgrade.sensors'::regclass, 'post_11_upgrade.func_in_transaction_def'::regproc, 'post_11_upgrade.partial_index_test_config'::regconfig, 'post_11_upgrade.my_type'::regtype, 'post_11_upgrade.view_for_upgrade_test'::regclass, 'post_11_upgrade.view_for_upgrade_test_my_type'::regclass, 'post_11_upgrade.non_dist_upgrade_ref_view_2'::regclass, 'post_11_upgrade.reporting_line'::regclass) ORDER BY 1;$$) ORDER BY 1;
 
 -- Create the necessary test utility function
 CREATE OR REPLACE FUNCTION activate_node_snapshot()
@@ -39,4 +39,6 @@ UNION
 			EXCEPT
 		SELECT unnest(activate_node_snapshot()) as command
 	)
-) AS foo WHERE command NOT ILIKE '%distributed_object_data%';
+) AS foo WHERE command NOT ILIKE '%distributed_object_data%' and
+-- sequences differ per node, so exclude
+command NOT ILIKE '%sequence%';

src/test/regress/sql/upgrade_post_11_before.sql

@@ -104,6 +104,19 @@ INSERT INTO colocated_dist_table SELECT i FROM generate_series(0,1000)i;
 INSERT INTO colocated_partitioned_table SELECT i, '2020-01-05' FROM generate_series(0,1000)i;
 INSERT INTO sensors SELECT i, '2020-01-05', '{}' FROM generate_series(0,1000)i;
 
+-- table for recursive view
+CREATE TABLE employees (employee_id int, manager_id int, full_name text);
+SELECT create_distributed_table('employees', 'employee_id');
+
+-- table for owned_by_extension
+-- note that tables owned by extension are
+-- not added to the pg_dist_object, and assumed
+-- to exists on all nodes via the extension
+CREATE TABLE owned_by_extension_table (employee_id int, manager_id int, full_name text);
+ALTER EXTENSION plpgsql ADD TABLE post_11_upgrade.owned_by_extension_table;
+SELECT create_distributed_table('owned_by_extension_table', 'employee_id');
+SELECT run_command_on_workers($$CREATE TABLE post_11_upgrade.owned_by_extension_table (employee_id int, manager_id int, full_name text);$$);
+SELECT run_command_on_workers($$ALTER EXTENSION plpgsql ADD TABLE post_11_upgrade.owned_by_extension_table;$$);
 
 SET citus.enable_ddl_propagation TO off;
 CREATE TEXT SEARCH CONFIGURATION post_11_upgrade.partial_index_test_config ( parser = default );
@@ -129,6 +142,83 @@ END;
 $$;');
 
 CREATE TYPE post_11_upgrade.my_type AS (a int);
+CREATE VIEW post_11_upgrade.view_for_upgrade_test AS SELECT * FROM sensors;
+
+-- one normally would not need views on the workers pre-11, but still
+-- nice test to have
+SELECT run_command_on_workers('SET citus.enable_ddl_propagation TO off;
+CREATE VIEW post_11_upgrade.view_for_upgrade_test AS SELECT * FROM sensors;');
+
+
+-- a non-distributed type dependency to a view
+-- both the view and the type should be distributed after the upgrade
+CREATE TYPE post_11_upgrade.my_type_for_view AS (a int);
+CREATE VIEW post_11_upgrade.view_for_upgrade_test_my_type (casted) AS SELECT row(measureid)::post_11_upgrade.my_type_for_view FROM sensors;
+
+-- a local type, table and view, should not be distributed
+-- after the upgrade
+CREATE TYPE post_11_upgrade.local_type AS (a int);
+CREATE TABLE post_11_upgrade.non_dist_table_for_view(a int, b post_11_upgrade.local_type);
+CREATE VIEW post_11_upgrade.non_dist_upgrade_test_view AS SELECT * FROM non_dist_table_for_view;
+
+-- a local table joined with a distributed table. In other words, the view has a local table dependency
+-- and should not be distributed after the upgrade
+CREATE TABLE post_11_upgrade.non_dist_dist_table_for_view(a int);
+CREATE VIEW post_11_upgrade.non_dist_upgrade_test_view_local_join AS SELECT * FROM non_dist_table_for_view JOIN sensors ON (true);
+
+-- a view selecting from multiple
+-- distributed/reference tables should be marked as distributed
+CREATE VIEW post_11_upgrade.non_dist_upgrade_multiple_dist_view AS SELECT colocated_dist_table.* FROM colocated_dist_table JOIN sensors ON (true) JOIN reference_table ON (true);
+
+-- a view selecting from reference table should be fine
+CREATE VIEW post_11_upgrade.non_dist_upgrade_ref_view AS SELECT * FROM reference_table;
+
+-- a view selecting from another (distributed) view should also be distributed
+CREATE VIEW post_11_upgrade.non_dist_upgrade_ref_view_2 AS SELECT * FROM non_dist_upgrade_ref_view;
+
+-- materialized views never becomes distributed
+CREATE MATERIALIZED VIEW post_11_upgrade.materialized_view AS SELECT * FROM reference_table;
+
+CREATE VIEW post_11_upgrade.owned_by_extension_view AS SELECT * FROM reference_table;
+ALTER EXTENSION plpgsql ADD VIEW post_11_upgrade.owned_by_extension_view;
+
+-- temporary views should not be marked as distributed
+CREATE VIEW pg_temp.temp_view_1 AS SELECT * FROM reference_table;
+CREATE temporary VIEW temp_view_2 AS SELECT * FROM reference_table;
+
+-- we should be able to distribute recursive views
+CREATE OR REPLACE RECURSIVE VIEW reporting_line (employee_id, subordinates) AS
+SELECT employee_id,
+       full_name AS subordinates
+FROM employees
+WHERE manager_id IS NULL
+UNION ALL
+SELECT e.employee_id,
+       (rl.subordinates || ' > ' || e.full_name) AS subordinates
+FROM employees e
+INNER JOIN reporting_line rl ON e.manager_id = rl.employee_id;
+
+-- v_test_1 and v_test_2 becomes circularly dependend views
+-- so we should not try to distribute any of the views
+CREATE VIEW post_11_upgrade.v_test_1 AS SELECT * FROM sensors;
+CREATE VIEW post_11_upgrade.v_test_2 AS SELECT * FROM sensors;
+CREATE OR REPLACE VIEW post_11_upgrade.v_test_1 AS SELECT sensors.* FROM sensors JOIN v_test_2 USING (measureid);
+CREATE OR REPLACE VIEW post_11_upgrade.v_test_2 AS SELECT sensors.* FROM sensors JOIN v_test_1 USING (measureid);
+
+-- views that do not depeend on anything should be distributed
+CREATE VIEW post_11_upgrade.depends_on_nothing_1 AS SELECT * FROM (VALUES (1)) as values;
+CREATE VIEW post_11_upgrade.depends_on_nothing_2 AS SELECT 1;
+
+-- views depends pg/citus objects should be distributed
+CREATE VIEW post_11_upgrade.depends_on_pg AS SELECT * FROM pg_class;
+CREATE VIEW post_11_upgrade.depends_on_citus AS SELECT * FROM pg_dist_partition;
+
+-- views depend on sequences only should be distributed
+CREATE SEQUENCE post_11_upgrade.seq_bigint AS bigint INCREMENT BY 3 CACHE 10 CYCLE;
+CREATE VIEW post_11_upgrade.depends_on_seq AS SELECT nextval('post_11_upgrade.seq_bigint');
+
+-- views depend on a sequence and a local table should not be distributed
+CREATE VIEW post_11_upgrade.depends_on_seq_and_no_support AS SELECT nextval('post_11_upgrade.seq_bigint') FROM post_11_upgrade.non_dist_table_for_view;
 
 RESET citus.enable_ddl_propagation;