[GitHub] incubator-hawq pull request #795: HAWQ-860. Fix ORCA wrong plan when correla...

[hsyuan]

Github user hsyuan closed the pull request at:

https://github.com/apache/incubator-hawq/pull/795


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[GitHub] incubator-hawq pull request #795: HAWQ-860. Fix ORCA wrong plan when correla...

[hsyuan]

GitHub user hsyuan opened a pull request:

https://github.com/apache/incubator-hawq/pull/795

HAWQ-860. Fix ORCA wrong plan when correlated subquery contains 
set-returning functions

ORCA 1.633 returns wrong result for the following query:
```sql
select 0 is distinct from (select count(1) from (select unnest(array[1, 2, 
3])) as foo);
?column?
--
 t
 t
 t
(3 rows)
```
Correct result should be:
```sql
?column?
--
 t
(1 row)
```
This bug was fixed by bumping ORCA version to 1.634.

For detail information, see ORCA pull request:
https://github.com/greenplum-db/gporca/pull/49

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/hsyuan/incubator-hawq HAWQ-860

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/incubator-hawq/pull/795.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #795


commit eef9fe3c330119bdeaecc8f5b18382d1b9568e46
Author: Haisheng Yuan and Omer Arap 
Date:   2016-07-14T19:16:40Z

Fix ORCA wrong plan when correlated subquery contains set-returning 
functions




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