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Re-disable master evaluation for SELECT

pull/895/head
Marco Slot 2016-10-21 10:51:47 +02:00
parent 2dcca0939b
commit 02d2b86e68
3 changed files with 23 additions and 1 deletions
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3
src/backend/distributed/planner/multi_router_planner.c
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@ -1474,7 +1474,7 @@ RouterQueryJob(Query *query, Task *task, List *placementList)
Job *job = NULL;
List *taskList = NIL;
TaskType taskType = task->taskType;
bool requiresMasterEvaluation = RequiresMasterEvaluation(query);
bool requiresMasterEvaluation = false;
/*
* We send modify task to the first replica, otherwise we choose the target shard
@ -1484,6 +1484,7 @@ RouterQueryJob(Query *query, Task *task, List *placementList)
if (taskType == MODIFY_TASK)
{
taskList = FirstReplicaAssignTaskList(list_make1(task));
requiresMasterEvaluation = RequiresMasterEvaluation(query);
}
else
{

17
src/test/regress/expected/multi_router_planner.out
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@ -524,6 +524,23 @@ DETAIL: Join types other than inner/outer joins are currently unsupported
SELECT * FROM articles_hash WHERE author_id = (SELECT 1);
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries other than in from-clause are currently unsupported
-- unless the query can be transformed into a join
SELECT * FROM articles_hash
WHERE author_id IN (SELECT author_id FROM articles_hash WHERE author_id = 2)
ORDER BY articles_hash.id;
DEBUG: predicate pruning for shardId 840000
DEBUG: predicate pruning for shardId 840000
DEBUG: Creating router plan
DEBUG: Plan is router executable
id | author_id | title | word_count
----+-----------+------------+------------
2 | 2 | abducing | 13642
12 | 2 | archiblast | 18185
22 | 2 | antipope | 2728
32 | 2 | amazon | 11342
42 | 2 | ausable | 15885
(5 rows)
-- subqueries are supported in FROM clause but they are not router plannable
SELECT articles_hash.id,test.word_count
FROM articles_hash, (SELECT id, word_count FROM articles_hash) AS test WHERE test.id = articles_hash.id

4
src/test/regress/sql/multi_router_planner.sql
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@ -250,6 +250,10 @@ SELECT * FROM articles_hash WHERE author_id IN (SELECT author_id FROM articles_h
SELECT * FROM articles_hash WHERE author_id = (SELECT 1);
-- unless the query can be transformed into a join
SELECT * FROM articles_hash
WHERE author_id IN (SELECT author_id FROM articles_hash WHERE author_id = 2)
ORDER BY articles_hash.id;
-- subqueries are supported in FROM clause but they are not router plannable
SELECT articles_hash.id,test.word_count