Maxim Gekk d08f53dc61 [SPARK-24605][SQL] size(null) returns null instead of -1 ... ## What changes were proposed in this pull request? In PR, I propose new behavior of `size(null)` under the config flag `spark.sql.legacy.sizeOfNull`. If the former one is disabled, the `size()` function returns `null` for `null` input. By default the `spark.sql.legacy.sizeOfNull` is enabled to keep backward compatibility with previous versions. In that case, `size(null)` returns `-1`. ## How was this patch tested? Modified existing tests for the `size()` function to check new behavior (`null`) and old one (`-1`). Author: Maxim Gekk <maxim.gekk@databricks.com> Closes #21598 from MaxGekk/legacy-size-of-null.		2018-06-27 10:36:51 +08:00
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benchmarks	[SPARK-17335][SQL] Fix ArrayType and MapType CatalogString.	2016-09-03 19:02:20 +02:00
src	[SPARK-24605][SQL] size(null) returns null instead of -1	2018-06-27 10:36:51 +08:00
pom.xml	[SPARK-17916][SQL] Fix empty string being parsed as null when nullValue is set.	2018-05-14 10:01:06 +08:00