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Merge pull request #2335 from citusdata/fix_mx_schema 

Fix DDL execution bug on MX when search_path is used
pull/2327/head
Önder Kalacı 2018-08-13 19:52:21 +03:00 committed by GitHub
parent 537d80abdb 85d418412d
commit 904e1781fa
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 255 additions and 2 deletions
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100
src/backend/distributed/executor/multi_utility.c
View File

@ -158,6 +158,8 @@ static bool IsIndexRenameStmt(RenameStmt *renameStmt);
static bool AlterInvolvesPartitionColumn(AlterTableStmt *alterTableStatement,
AlterTableCmd *command);
static void ExecuteDistributedDDLJob(DDLJob *ddlJob);
static char * SetSearchPathToCurrentSearchPathCommand(void);
static char * CurrentSearchPath(void);
static List * CreateIndexTaskList(Oid relationId, IndexStmt *indexStmt);
static List * DropIndexTaskList(Oid relationId, Oid indexId, DropStmt *dropStmt);
static List * InterShardDDLTaskList(Oid leftRelationId, Oid rightRelationId,
@ -3146,7 +3148,19 @@ ExecuteDistributedDDLJob(DDLJob *ddlJob)
{
if (shouldSyncMetadata)
{
char *setSearchPathCommand = SetSearchPathToCurrentSearchPathCommand();
SendCommandToWorkers(WORKERS_WITH_METADATA, DISABLE_DDL_PROPAGATION);
/*
* Given that we're relaying the query to the worker nodes directly,
* we should set the search path exactly the same when necessary.
*/
if (setSearchPathCommand != NULL)
{
SendCommandToWorkers(WORKERS_WITH_METADATA, setSearchPathCommand);
}
SendCommandToWorkers(WORKERS_WITH_METADATA, (char *) ddlJob->commandString);
}
@ -3173,8 +3187,19 @@ ExecuteDistributedDDLJob(DDLJob *ddlJob)
if (shouldSyncMetadata)
{
List *commandList = list_make2(DISABLE_DDL_PROPAGATION,
(char *) ddlJob->commandString);
List *commandList = list_make1(DISABLE_DDL_PROPAGATION);
char *setSearchPathCommand = SetSearchPathToCurrentSearchPathCommand();
/*
* Given that we're relaying the query to the worker nodes directly,
* we should set the search path exactly the same when necessary.
*/
if (setSearchPathCommand != NULL)
{
commandList = lappend(commandList, setSearchPathCommand);
}
commandList = lappend(commandList, (char *) ddlJob->commandString);
SendBareCommandListToWorkers(WORKERS_WITH_METADATA, commandList);
}
@ -3193,6 +3218,77 @@ ExecuteDistributedDDLJob(DDLJob *ddlJob)
}
/*
* SetSearchPathToCurrentSearchPathCommand generates a command which can
* set the search path to the exact same search path that the issueing node
* has.
*
* If the current search path is null (or doesn't have any valid schemas),
* the function returns NULL.
*/
static char *
SetSearchPathToCurrentSearchPathCommand(void)
{
StringInfo setCommand = NULL;
char *currentSearchPath = CurrentSearchPath();
if (currentSearchPath == NULL)
{
return NULL;
}
setCommand = makeStringInfo();
appendStringInfo(setCommand, "SET search_path TO %s;", currentSearchPath);
return setCommand->data;
}
/*
* CurrentSearchPath is a C interface for calling current_schemas(bool) that
* PostgreSQL exports.
*
* CurrentSchemas returns all the schemas in the seach_path that are seperated
* with comma (,) sign. The returned string can be used to set the search_path.
*
* The function omits implicit schemas.
*
* The function returns NULL if there are no valid schemas in the search_path,
* mimicing current_schemas(false) function.
*/
static char *
CurrentSearchPath(void)
{
StringInfo currentSearchPath = makeStringInfo();
List *searchPathList = fetch_search_path(false);
ListCell *searchPathCell;
bool schemaAdded = false;
foreach(searchPathCell, searchPathList)
{
char *schemaName = get_namespace_name(lfirst_oid(searchPathCell));
/* watch out for deleted namespace */
if (schemaName)
{
if (schemaAdded)
{
appendStringInfoString(currentSearchPath, ",");
schemaAdded = false;
}
appendStringInfoString(currentSearchPath, quote_identifier(schemaName));
schemaAdded = true;
}
}
/* fetch_search_path() returns a palloc'd list that we should free now */
list_free(searchPathList);
return (currentSearchPath->len > 0 ? currentSearchPath->data : NULL);
}
/*
* DDLTaskList builds a list of tasks to execute a DDL command on a
* given list of shards.

78
src/test/regress/expected/multi_mx_schema_support.out
View File

@ -373,3 +373,81 @@ WHERE
-- set task_executor back to real-time
SET citus.task_executor_type TO "real-time";
-- connect to the master and do some test
-- regarding DDL support on schemas where
-- the search_path is set
\c - - - :master_port
CREATE SCHEMA mx_ddl_schema_1;
CREATE SCHEMA mx_ddl_schema_2;
CREATE SCHEMA "CiTuS.TeAeN";
SET citus.shard_count TO 4;
SET citus.shard_replication_factor TO 1;
SET citus.replication_model TO 'streaming';
-- in the first test make sure that we handle DDLs
-- when search path is set
SET search_path TO mx_ddl_schema_1;
CREATE TABLE table_1 (key int PRIMARY KEY, value text);
SELECT create_distributed_table('table_1', 'key');
create_distributed_table
--------------------------
(1 row)
CREATE INDEX i1 ON table_1(value);
CREATE INDEX CONCURRENTLY i2 ON table_1(value);
-- now create a foriegn key on tables that are on seperate schemas
SET search_path TO mx_ddl_schema_1, mx_ddl_schema_2;
CREATE TABLE mx_ddl_schema_2.table_2 (key int PRIMARY KEY, value text);
SELECT create_distributed_table('mx_ddl_schema_2.table_2', 'key');
create_distributed_table
--------------------------
(1 row)
ALTER TABLE table_2 ADD CONSTRAINT test_constraint FOREIGN KEY (key) REFERENCES table_1(key);
-- we can also handle schema/table names with quotation
SET search_path TO "CiTuS.TeAeN";
CREATE TABLE "TeeNTabLE.1!?!"(id int, "TeNANt_Id" int);
SELECT create_distributed_table('"TeeNTabLE.1!?!"', 'id');
create_distributed_table
--------------------------
(1 row)
CREATE INDEX "MyTenantIndex" ON "CiTuS.TeAeN"."TeeNTabLE.1!?!"("TeNANt_Id");
SET search_path TO "CiTuS.TeAeN", mx_ddl_schema_1, mx_ddl_schema_2;
ALTER TABLE "TeeNTabLE.1!?!" ADD CONSTRAINT test_constraint_2 FOREIGN KEY (id) REFERENCES table_1(key);
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- same semantics with CREATE INDEX CONCURRENTLY such that
-- it uses a single connection to execute all the commands
SET citus.multi_shard_modify_mode TO 'sequential';
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
-- set it back to the default value
SET citus.multi_shard_modify_mode TO 'parallel';
-- test with a not existing schema is in the search path
SET search_path TO not_existing_schema, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- test with a public schema is in the search path
SET search_path TO public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
-- make sure that we handle transaction blocks properly
BEGIN;
SET search_path TO public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
SET search_path TO mx_ddl_schema_1;
CREATE INDEX i55 ON table_1(value);
SET search_path TO mx_ddl_schema_1, public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
DROP INDEX i55;
COMMIT;
-- set the search_path to null
SET search_path TO '';
ALTER TABLE "CiTuS.TeAeN"."TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- set the search_path to not existing schema
SET search_path TO not_existing_schema;
ALTER TABLE "CiTuS.TeAeN"."TeeNTabLE.1!?!" DROP COLUMN new_col;
DROP SCHEMA mx_ddl_schema_1, mx_ddl_schema_2, "CiTuS.TeAeN" CASCADE;
NOTICE: drop cascades to 3 other objects
DETAIL: drop cascades to table "CiTuS.TeAeN"."TeeNTabLE.1!?!"
drop cascades to table mx_ddl_schema_2.table_2
drop cascades to table mx_ddl_schema_1.table_1

79
src/test/regress/sql/multi_mx_schema_support.sql
View File

@ -220,3 +220,82 @@ WHERE
-- set task_executor back to real-time
SET citus.task_executor_type TO "real-time";
-- connect to the master and do some test
-- regarding DDL support on schemas where
-- the search_path is set
\c - - - :master_port
CREATE SCHEMA mx_ddl_schema_1;
CREATE SCHEMA mx_ddl_schema_2;
CREATE SCHEMA "CiTuS.TeAeN";
SET citus.shard_count TO 4;
SET citus.shard_replication_factor TO 1;
SET citus.replication_model TO 'streaming';
-- in the first test make sure that we handle DDLs
-- when search path is set
SET search_path TO mx_ddl_schema_1;
CREATE TABLE table_1 (key int PRIMARY KEY, value text);
SELECT create_distributed_table('table_1', 'key');
CREATE INDEX i1 ON table_1(value);
CREATE INDEX CONCURRENTLY i2 ON table_1(value);
-- now create a foriegn key on tables that are on seperate schemas
SET search_path TO mx_ddl_schema_1, mx_ddl_schema_2;
CREATE TABLE mx_ddl_schema_2.table_2 (key int PRIMARY KEY, value text);
SELECT create_distributed_table('mx_ddl_schema_2.table_2', 'key');
ALTER TABLE table_2 ADD CONSTRAINT test_constraint FOREIGN KEY (key) REFERENCES table_1(key);
-- we can also handle schema/table names with quotation
SET search_path TO "CiTuS.TeAeN";
CREATE TABLE "TeeNTabLE.1!?!"(id int, "TeNANt_Id" int);
SELECT create_distributed_table('"TeeNTabLE.1!?!"', 'id');
CREATE INDEX "MyTenantIndex" ON "CiTuS.TeAeN"."TeeNTabLE.1!?!"("TeNANt_Id");
SET search_path TO "CiTuS.TeAeN", mx_ddl_schema_1, mx_ddl_schema_2;
ALTER TABLE "TeeNTabLE.1!?!" ADD CONSTRAINT test_constraint_2 FOREIGN KEY (id) REFERENCES table_1(key);
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- same semantics with CREATE INDEX CONCURRENTLY such that
-- it uses a single connection to execute all the commands
SET citus.multi_shard_modify_mode TO 'sequential';
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
-- set it back to the default value
SET citus.multi_shard_modify_mode TO 'parallel';
-- test with a not existing schema is in the search path
SET search_path TO not_existing_schema, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- test with a public schema is in the search path
SET search_path TO public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
-- make sure that we handle transaction blocks properly
BEGIN;
SET search_path TO public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" ADD COLUMN new_col INT;
SET search_path TO mx_ddl_schema_1;
CREATE INDEX i55 ON table_1(value);
SET search_path TO mx_ddl_schema_1, public, "CiTuS.TeAeN";
ALTER TABLE "TeeNTabLE.1!?!" DROP COLUMN new_col;
DROP INDEX i55;
COMMIT;
-- set the search_path to null
SET search_path TO '';
ALTER TABLE "CiTuS.TeAeN"."TeeNTabLE.1!?!" ADD COLUMN new_col INT;
-- set the search_path to not existing schema
SET search_path TO not_existing_schema;
ALTER TABLE "CiTuS.TeAeN"."TeeNTabLE.1!?!" DROP COLUMN new_col;
DROP SCHEMA mx_ddl_schema_1, mx_ddl_schema_2, "CiTuS.TeAeN" CASCADE;