[SPARK-12201][SQL] add type coercion rule for greatest/least #10196
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Test build #47325 has finished for PR 10196 at commit
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Thanks, merging to master and 1.6. |
asfgit
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Dec 8, 2015
checked with hive, greatest/least should cast their children to a tightest common type, i.e. `(int, long) => long`, `(int, string) => error`, `(decimal(10,5), decimal(5, 10)) => error` Author: Wenchen Fan <wenchen@databricks.com> Closes #10196 from cloud-fan/type-coercion. (cherry picked from commit 381f17b) Signed-off-by: Michael Armbrust <michael@databricks.com>
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checked with hive, greatest/least should cast their children to a tightest common type,
i.e.
(int, long) => long,(int, string) => error,(decimal(10,5), decimal(5, 10)) => error