[SPARK-25096][SQL] Loosen nullability if the cast is force-nullable. #22086
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good catch! LGTM |
HyukjinKwon
approved these changes
Aug 13, 2018
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Test build #94664 has finished for PR 22086 at commit
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retest this please |
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LGTM too |
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Test build #94673 has finished for PR 22086 at commit
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Merged to master. |
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What changes were proposed in this pull request?
In type coercion for complex types, if the found type is force-nullable to cast, we should loosen the nullability to be able to cast. Also for map key type, we can't use the type.
How was this patch tested?
Added some test.