mirror of https://github.com/citusdata/citus.git
Create view and materialized views with right schema and owner while
altering the distributed table. To be able to alter view's owner without enforcing sequential mode. Alter view process functions have been udpated to use metadata connection.pull/5966/head
Burak Velioglu
parent
27ddb4fc8e
commit
1d7dda991f
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@ -206,6 +206,7 @@ static char * CreateWorkerChangeSequenceDependencyCommand(char *sequenceSchemaNa
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char *sourceName,
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char *targetSchemaName,
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char *targetName);
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static char * CreateMaterializedViewDDLCommand(Oid matViewOid);
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static char * GetAccessMethodForMatViewIfExists(Oid viewOid);
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static bool WillRecreateForeignKeyToReferenceTable(Oid relationId,
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CascadeToColocatedOption cascadeOption);
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@ -1263,33 +1264,22 @@ GetViewCreationCommandsOfTable(Oid relationId)
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Oid viewOid = InvalidOid;
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foreach_oid(viewOid, views)
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{
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Datum viewDefinitionDatum = DirectFunctionCall1(pg_get_viewdef,
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ObjectIdGetDatum(viewOid));
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char *viewDefinition = TextDatumGetCString(viewDefinitionDatum);
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StringInfo query = makeStringInfo();
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char *viewName = get_rel_name(viewOid);
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char *schemaName = get_namespace_name(get_rel_namespace(viewOid));
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char *qualifiedViewName = quote_qualified_identifier(schemaName, viewName);
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bool isMatView = get_rel_relkind(viewOid) == RELKIND_MATVIEW;
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/* here we need to get the access method of the view to recreate it */
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char *accessMethodName = GetAccessMethodForMatViewIfExists(viewOid);
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appendStringInfoString(query, "CREATE ");
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if (isMatView)
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/* See comments on CreateMaterializedViewDDLCommand for its limitations */
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if (get_rel_relkind(viewOid) == RELKIND_MATVIEW)
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{
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appendStringInfoString(query, "MATERIALIZED ");
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char *matViewCreateCommands = CreateMaterializedViewDDLCommand(viewOid);
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appendStringInfoString(query, matViewCreateCommands);
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}
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else
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{
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char *viewCreateCommand = CreateViewDDLCommand(viewOid);
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appendStringInfoString(query, viewCreateCommand);
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}
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appendStringInfo(query, "VIEW %s ", qualifiedViewName);
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if (accessMethodName)
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{
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appendStringInfo(query, "USING %s ", accessMethodName);
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}
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appendStringInfo(query, "AS %s", viewDefinition);
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char *alterViewCommmand = AlterViewOwnerCommand(viewOid);
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appendStringInfoString(query, alterViewCommmand);
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commands = lappend(commands, makeTableDDLCommandString(query->data));
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}
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@ -1298,6 +1288,64 @@ GetViewCreationCommandsOfTable(Oid relationId)
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}
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/*
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* CreateMaterializedViewDDLCommand creates the command to create materialized view.
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* Note that this function doesn't support
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* - Aliases
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* - Storage parameters
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* - Tablespace
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* - WITH [NO] DATA
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* options for the given materialized view. Parser functions for materialized views
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* should be added to handle them.
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*
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* Related issue: https://github.com/citusdata/citus/issues/5968
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*/
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static char *
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CreateMaterializedViewDDLCommand(Oid matViewOid)
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{
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StringInfo query = makeStringInfo();
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char *viewName = get_rel_name(matViewOid);
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char *schemaName = get_namespace_name(get_rel_namespace(matViewOid));
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char *qualifiedViewName = quote_qualified_identifier(schemaName, viewName);
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/* here we need to get the access method of the view to recreate it */
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char *accessMethodName = GetAccessMethodForMatViewIfExists(matViewOid);
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appendStringInfo(query, "CREATE MATERIALIZED VIEW %s ", qualifiedViewName);
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if (accessMethodName)
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{
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appendStringInfo(query, "USING %s ", accessMethodName);
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}
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/*
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* Set search_path to NIL so that all objects outside of pg_catalog will be
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* schema-prefixed.
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*/
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OverrideSearchPath *overridePath = GetOverrideSearchPath(CurrentMemoryContext);
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overridePath->schemas = NIL;
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overridePath->addCatalog = true;
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PushOverrideSearchPath(overridePath);
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/*
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* Push the transaction snapshot to be able to get vief definition with pg_get_viewdef
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*/
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PushActiveSnapshot(GetTransactionSnapshot());
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Datum viewDefinitionDatum = DirectFunctionCall1(pg_get_viewdef,
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ObjectIdGetDatum(matViewOid));
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char *viewDefinition = TextDatumGetCString(viewDefinitionDatum);
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PopActiveSnapshot();
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PopOverrideSearchPath();
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appendStringInfo(query, "AS %s", viewDefinition);
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return query->data;
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}
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/*
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* ReplaceTable replaces the source table with the target table.
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* It moves all the rows of the source table to target table with INSERT SELECT.
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@ -401,7 +401,7 @@ AppendViewDefinitionToCreateViewCommand(StringInfo buf, Oid viewOid)
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/*
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* AlterViewOwnerCommand returns the command to alter view owner command for the
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* given view oid.
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* given view or materialized view oid.
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*/
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char *
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AlterViewOwnerCommand(Oid viewOid)
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@ -416,9 +416,18 @@ AlterViewOwnerCommand(Oid viewOid)
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char *viewOwnerName = TableOwner(viewOid);
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char *qualifiedViewName = NameListToQuotedString(list_make2(makeString(schemaName),
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makeString(viewName)));
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appendStringInfo(alterOwnerCommand,
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"ALTER VIEW %s OWNER TO %s", qualifiedViewName,
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quote_identifier(viewOwnerName));
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if (get_rel_relkind(viewOid) == RELKIND_MATVIEW)
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{
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appendStringInfo(alterOwnerCommand, "ALTER MATERIALIZED VIEW %s ",
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qualifiedViewName);
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}
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else
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{
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appendStringInfo(alterOwnerCommand, "ALTER VIEW %s ", qualifiedViewName);
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}
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appendStringInfo(alterOwnerCommand, "OWNER TO %s", quote_identifier(viewOwnerName));
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return alterOwnerCommand->data;
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}
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@ -457,16 +466,20 @@ PreprocessAlterViewStmt(Node *node, const char *queryString, ProcessUtilityConte
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QualifyTreeNode((Node *) stmt);
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EnsureCoordinator();
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EnsureSequentialMode(OBJECT_VIEW);
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/* reconstruct alter statement in a portable fashion */
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const char *alterViewStmtSql = DeparseTreeNode((Node *) stmt);
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List *commands = list_make3(DISABLE_DDL_PROPAGATION,
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(void *) alterViewStmtSql,
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ENABLE_DDL_PROPAGATION);
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/*
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* To avoid sequential mode, we are using metadata connection. For the
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* detailed explanation, please check the comment on PostprocessViewStmt.
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*/
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DDLJob *ddlJob = palloc0(sizeof(DDLJob));
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ddlJob->targetObjectAddress = viewAddress;
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ddlJob->metadataSyncCommand = alterViewStmtSql;
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ddlJob->taskList = NIL;
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return NodeDDLTaskList(NON_COORDINATOR_NODES, commands);
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return list_make1(ddlJob);
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}
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@ -527,8 +540,8 @@ List *
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PreprocessRenameViewStmt(Node *node, const char *queryString,
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ProcessUtilityContext processUtilityContext)
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{
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ObjectAddress typeAddress = GetObjectAddressFromParseTree(node, true);
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if (!ShouldPropagateObject(&typeAddress))
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ObjectAddress viewAddress = GetObjectAddressFromParseTree(node, true);
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if (!ShouldPropagateObject(&viewAddress))
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{
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return NIL;
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}
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@ -541,14 +554,16 @@ PreprocessRenameViewStmt(Node *node, const char *queryString,
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/* deparse sql*/
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const char *renameStmtSql = DeparseTreeNode(node);
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EnsureSequentialMode(OBJECT_VIEW);
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/*
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* To avoid sequential mode, we are using metadata connection. For the
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* detailed explanation, please check the comment on PostprocessViewStmt.
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*/
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DDLJob *ddlJob = palloc0(sizeof(DDLJob));
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ddlJob->targetObjectAddress = viewAddress;
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ddlJob->metadataSyncCommand = renameStmtSql;
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ddlJob->taskList = NIL;
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/* to prevent recursion with mx we disable ddl propagation */
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List *commands = list_make3(DISABLE_DDL_PROPAGATION,
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(void *) renameStmtSql,
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ENABLE_DDL_PROPAGATION);
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return NodeDDLTaskList(NON_COORDINATOR_NODES, commands);
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return list_make1(ddlJob);
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}
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@ -580,24 +595,28 @@ PreprocessAlterViewSchemaStmt(Node *node, const char *queryString,
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{
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AlterObjectSchemaStmt *stmt = castNode(AlterObjectSchemaStmt, node);
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ObjectAddress typeAddress = GetObjectAddressFromParseTree((Node *) stmt, true);
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if (!ShouldPropagateObject(&typeAddress))
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ObjectAddress viewAddress = GetObjectAddressFromParseTree((Node *) stmt, true);
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if (!ShouldPropagateObject(&viewAddress))
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{
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return NIL;
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}
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EnsureCoordinator();
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EnsureSequentialMode(OBJECT_VIEW);
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QualifyTreeNode((Node *) stmt);
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const char *sql = DeparseTreeNode((Node *) stmt);
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List *commands = list_make3(DISABLE_DDL_PROPAGATION,
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(void *) sql,
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ENABLE_DDL_PROPAGATION);
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/*
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* To avoid sequential mode, we are using metadata connection. For the
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* detailed explanation, please check the comment on PostprocessViewStmt.
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*/
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DDLJob *ddlJob = palloc0(sizeof(DDLJob));
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ddlJob->targetObjectAddress = viewAddress;
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ddlJob->metadataSyncCommand = sql;
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ddlJob->taskList = NIL;
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return NodeDDLTaskList(NON_COORDINATOR_NODES, commands);
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return list_make1(ddlJob);
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}
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@ -904,5 +904,82 @@ SELECT amname FROM pg_am WHERE oid IN (SELECT relam FROM pg_class WHERE relname
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columnar
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(1 row)
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-- verify that alter_distributed_table works if it has dependent views and materialized views
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-- set colocate_with explicitly to not to affect other tables
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CREATE SCHEMA schema_to_test_alter_dist_table;
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SET search_path to schema_to_test_alter_dist_table;
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CREATE TABLE test_alt_dist_table_1(a int, b int);
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SELECT create_distributed_table('test_alt_dist_table_1', 'a', colocate_with => 'None');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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CREATE TABLE test_alt_dist_table_2(a int, b int);
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SELECT create_distributed_table('test_alt_dist_table_2', 'a', colocate_with => 'test_alt_dist_table_1');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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CREATE VIEW dependent_view_1 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2;
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CREATE VIEW dependent_view_2 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2 JOIN test_alt_dist_table_1 USING(a);
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CREATE MATERIALIZED VIEW dependent_mat_view_1 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2;
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-- Alter owner to make sure that alter_distributed_table doesn't change view's owner
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SET client_min_messages TO WARNING;
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CREATE USER alter_dist_table_test_user;
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SELECT 1 FROM run_command_on_workers($$CREATE USER alter_dist_table_test_user$$);
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?column?
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---------------------------------------------------------------------
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1
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1
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(2 rows)
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ALTER VIEW dependent_view_1 OWNER TO alter_dist_table_test_user;
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ALTER VIEW dependent_view_2 OWNER TO alter_dist_table_test_user;
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ALTER MATERIALIZED VIEW dependent_mat_view_1 OWNER TO alter_dist_table_test_user;
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SELECT alter_distributed_table('test_alt_dist_table_1', shard_count:=12, cascade_to_colocated:=true);
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alter_distributed_table
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---------------------------------------------------------------------
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(1 row)
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SELECT viewowner FROM pg_views WHERE viewname IN ('dependent_view_1', 'dependent_view_2');
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viewowner
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---------------------------------------------------------------------
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alter_dist_table_test_user
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alter_dist_table_test_user
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(2 rows)
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SELECT matviewowner FROM pg_matviews WHERE matviewname = 'dependent_mat_view_1';
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matviewowner
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---------------------------------------------------------------------
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alter_dist_table_test_user
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(1 row)
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-- Check the existence of the view on the worker node as well
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SELECT run_command_on_workers($$SELECT viewowner FROM pg_views WHERE viewname = 'dependent_view_1'$$);
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run_command_on_workers
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---------------------------------------------------------------------
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(localhost,57637,t,alter_dist_table_test_user)
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(localhost,57638,t,alter_dist_table_test_user)
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(2 rows)
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SELECT run_command_on_workers($$SELECT viewowner FROM pg_views WHERE viewname = 'dependent_view_2'$$);
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run_command_on_workers
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---------------------------------------------------------------------
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(localhost,57637,t,alter_dist_table_test_user)
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(localhost,57638,t,alter_dist_table_test_user)
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(2 rows)
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-- It is expected to not have mat view on worker node
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SELECT run_command_on_workers($$SELECT count(*) FROM pg_matviews WHERE matviewname = 'dependent_mat_view_1';$$);
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run_command_on_workers
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---------------------------------------------------------------------
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(localhost,57637,t,0)
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(localhost,57638,t,0)
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(2 rows)
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RESET search_path;
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DROP SCHEMA alter_distributed_table CASCADE;
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DROP SCHEMA schema_to_test_alter_dist_table CASCADE;
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@ -564,6 +564,35 @@ ALTER VIEW IF EXISTS non_existing_view RENAME val2 TO val1;
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NOTICE: relation "non_existing_view" does not exist, skipping
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ALTER VIEW IF EXISTS non_existing_view SET SCHEMA view_prop_schema;
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NOTICE: relation "non_existing_view" does not exist, skipping
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-- Show that create view and alter view commands can be run from same transaction
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-- but not the drop view. Since we can not use metadata connection for drop view commands
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BEGIN;
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SET LOCAL citus.force_max_query_parallelization TO ON;
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CREATE TABLE table_1_to_view_in_transaction(a int);
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SELECT create_distributed_table('table_1_to_view_in_transaction', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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CREATE TABLE table_2_to_view_in_transaction(a int);
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SELECT create_distributed_table('table_2_to_view_in_transaction', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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-- we can create/alter/drop views even in parallel mode
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CREATE VIEW view_in_transaction AS SELECT table_1_to_view_in_transaction.* FROM table_2_to_view_in_transaction JOIN table_1_to_view_in_transaction USING (a);
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ALTER TABLE view_in_transaction SET (security_barrier);
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ALTER VIEW view_in_transaction SET SCHEMA public;
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ALTER VIEW public.view_in_transaction SET SCHEMA view_prop_schema_inner;
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ALTER TABLE view_prop_schema_inner.view_in_transaction RENAME COLUMN a TO b;
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DROP VIEW view_prop_schema_inner.view_in_transaction;
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ERROR: cannot run view command because there was a parallel operation on a distributed table in the transaction
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DETAIL: When running command on/for a distributed view, Citus needs to perform all operations over a single connection per node to ensure consistency.
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HINT: Try re-running the transaction with "SET LOCAL citus.multi_shard_modify_mode TO 'sequential';"
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ROLLBACK;
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SET client_min_messages TO ERROR;
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DROP SCHEMA view_prop_schema_inner CASCADE;
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DROP SCHEMA view_prop_schema CASCADE;
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@ -300,5 +300,41 @@ CREATE MATERIALIZED VIEW test_mat_view_am USING COLUMNAR AS SELECT count(*), a F
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SELECT alter_distributed_table('test_am_matview', shard_count:= 52);
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SELECT amname FROM pg_am WHERE oid IN (SELECT relam FROM pg_class WHERE relname ='test_mat_view_am');
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-- verify that alter_distributed_table works if it has dependent views and materialized views
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-- set colocate_with explicitly to not to affect other tables
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CREATE SCHEMA schema_to_test_alter_dist_table;
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SET search_path to schema_to_test_alter_dist_table;
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CREATE TABLE test_alt_dist_table_1(a int, b int);
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SELECT create_distributed_table('test_alt_dist_table_1', 'a', colocate_with => 'None');
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CREATE TABLE test_alt_dist_table_2(a int, b int);
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SELECT create_distributed_table('test_alt_dist_table_2', 'a', colocate_with => 'test_alt_dist_table_1');
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CREATE VIEW dependent_view_1 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2;
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CREATE VIEW dependent_view_2 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2 JOIN test_alt_dist_table_1 USING(a);
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CREATE MATERIALIZED VIEW dependent_mat_view_1 AS SELECT test_alt_dist_table_2.* FROM test_alt_dist_table_2;
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-- Alter owner to make sure that alter_distributed_table doesn't change view's owner
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SET client_min_messages TO WARNING;
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CREATE USER alter_dist_table_test_user;
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SELECT 1 FROM run_command_on_workers($$CREATE USER alter_dist_table_test_user$$);
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ALTER VIEW dependent_view_1 OWNER TO alter_dist_table_test_user;
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ALTER VIEW dependent_view_2 OWNER TO alter_dist_table_test_user;
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ALTER MATERIALIZED VIEW dependent_mat_view_1 OWNER TO alter_dist_table_test_user;
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SELECT alter_distributed_table('test_alt_dist_table_1', shard_count:=12, cascade_to_colocated:=true);
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SELECT viewowner FROM pg_views WHERE viewname IN ('dependent_view_1', 'dependent_view_2');
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SELECT matviewowner FROM pg_matviews WHERE matviewname = 'dependent_mat_view_1';
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-- Check the existence of the view on the worker node as well
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SELECT run_command_on_workers($$SELECT viewowner FROM pg_views WHERE viewname = 'dependent_view_1'$$);
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SELECT run_command_on_workers($$SELECT viewowner FROM pg_views WHERE viewname = 'dependent_view_2'$$);
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-- It is expected to not have mat view on worker node
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SELECT run_command_on_workers($$SELECT count(*) FROM pg_matviews WHERE matviewname = 'dependent_mat_view_1';$$);
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RESET search_path;
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DROP SCHEMA alter_distributed_table CASCADE;
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DROP SCHEMA schema_to_test_alter_dist_table CASCADE;
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@ -356,6 +356,25 @@ ALTER VIEW IF EXISTS non_existing_view RENAME COLUMN val1 TO val2;
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ALTER VIEW IF EXISTS non_existing_view RENAME val2 TO val1;
|
||||
ALTER VIEW IF EXISTS non_existing_view SET SCHEMA view_prop_schema;
|
||||
|
||||
-- Show that create view and alter view commands can be run from same transaction
|
||||
-- but not the drop view. Since we can not use metadata connection for drop view commands
|
||||
BEGIN;
|
||||
SET LOCAL citus.force_max_query_parallelization TO ON;
|
||||
CREATE TABLE table_1_to_view_in_transaction(a int);
|
||||
SELECT create_distributed_table('table_1_to_view_in_transaction', 'a');
|
||||
|
||||
CREATE TABLE table_2_to_view_in_transaction(a int);
|
||||
SELECT create_distributed_table('table_2_to_view_in_transaction', 'a');
|
||||
|
||||
-- we can create/alter/drop views even in parallel mode
|
||||
CREATE VIEW view_in_transaction AS SELECT table_1_to_view_in_transaction.* FROM table_2_to_view_in_transaction JOIN table_1_to_view_in_transaction USING (a);
|
||||
ALTER TABLE view_in_transaction SET (security_barrier);
|
||||
ALTER VIEW view_in_transaction SET SCHEMA public;
|
||||
ALTER VIEW public.view_in_transaction SET SCHEMA view_prop_schema_inner;
|
||||
ALTER TABLE view_prop_schema_inner.view_in_transaction RENAME COLUMN a TO b;
|
||||
DROP VIEW view_prop_schema_inner.view_in_transaction;
|
||||
ROLLBACK;
|
||||
|
||||
SET client_min_messages TO ERROR;
|
||||
DROP SCHEMA view_prop_schema_inner CASCADE;
|
||||
DROP SCHEMA view_prop_schema CASCADE;
|
||||
|
|
|
|||
Loading…
Reference in New Issue