[SPARK-25084][SQL] distribute by on multiple columns may lead to code…

[LantaoJin]

…gen issue

What changes were proposed in this pull request?

"distribute by" on multiple columns may lead to codegen issue

How was this patch tested?

manual test

[LantaoJin]

@cloud-fan@jerryshao

[jerryshao]

ok to test.

[SparkQA]

Test build #94547 has finished for PR 22067 at commit 9e6941c.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[LantaoJin]

ok to test.

[LantaoJin]

@jerryshao Could you help to trigger test build please?

[LantaoJin]

Add unit test with a rand() column in 'distribute by'

[SparkQA]

Test build #94556 has finished for PR 22067 at commit 0a6bccc.

• This patch fails SparkR unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[kiszk]

retest this please

[SparkQA]

Test build #94562 has finished for PR 22067 at commit b799e92.

• This patch fails SparkR unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #94568 has finished for PR 22067 at commit b799e92.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[LantaoJin]

�Seems #22066 has changed the implementation with a similar approach. I will close this one.