HyukjinKwon fc7a37b147 [SPARK-30003][SQL] Do not throw stack overflow exception in non-root unknown hint resolution ... ### What changes were proposed in this pull request? This is rather a followup of https://github.com/apache/spark/pull/25464 (see https://github.com/apache/spark/pull/25464/files#r349543286) It will cause an infinite recursion via mapping children - we should return the hint rather than its parent plan in unknown hint resolution. ### Why are the changes needed? Prevent Stack over flow during hint resolution. ### Does this PR introduce any user-facing change? Yes, it avoids stack overflow exception It was caused by https://github.com/apache/spark/pull/25464 and this is only in the master. No behaviour changes to end users as it happened only in the master. ### How was this patch tested? Unittest was added. Closes #26642 from HyukjinKwon/SPARK-30003. Authored-by: HyukjinKwon <gurwls223@apache.org> Signed-off-by: HyukjinKwon <gurwls223@apache.org>		2019-11-23 17:24:56 +09:00
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benchmarks	[SPARK-29300][TESTS] Compare catalyst and avro module benchmark in JDK8/11	2019-09-30 17:59:43 -07:00
src	[SPARK-30003][SQL] Do not throw stack overflow exception in non-root unknown hint resolution	2019-11-23 17:24:56 +09:00
pom.xml	[SPARK-29923][SQL][TESTS] Set io.netty.tryReflectionSetAccessible for Arrow on JDK9+	2019-11-15 23:58:15 -08:00