GitHub user dilipbiswal opened a pull request:
https://github.com/apache/spark/pull/8983
[SPARK-8654][SQL] Fix Analysis exception when using NULL IN (...)
In the analysis phase , while processing the rules for IN predicate, we
compare the in-list types to the lhs expression type and generate
cast operation if necessary. In the case of NULL [NOT] IN expr1 , we end up
generating cast between in list types to NULL like cast (1 as NULL) which
is not a valid cast.
The fix is to not generate such a cast if the lhs type is a NullType instead
we translate the expression to Literal(Null).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dilipbiswal/spark spark_8654
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8983.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 #8983
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commit 38f973bb124c63c1caabe14ee6e5cca7b764b15a
Author: Dilip Biswal <dbis...@us.ibm.com>
Date: 2015-10-02T23:20:56Z
[SPARK-8654] Analysis exception when using NULL IN (...) : invalid cast
In the analysis phase , while processing the rules for IN predicate, we
compare the in-list types to the lhs expression type and generate
cast operation if necessary. In the case of NULL [NOT] IN expr1 , we end up
generating cast between in list types to NULL like cast (1 as NULL) which
is not a valid cast.
The fix is to not generate such a cast if the lhs type is a NullType instead
we translate the expression to Literal(Null).
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