Mario Molina c9cb393dc4 [SPARK-17916][SPARK-25241][SQL][FOLLOW-UP] Fix empty string being parsed as null when nullValue is set. ... ## What changes were proposed in this pull request? In the PR, I propose new CSV option `emptyValue` and an update in the SQL Migration Guide which describes how to revert previous behavior when empty strings were not written at all. Since Spark 2.4, empty strings are saved as `""` to distinguish them from saved `null`s. Closes #22234 Closes #22367 ## How was this patch tested? It was tested by `CSVSuite` and new tests added in the PR #22234 Closes #22389 from MaxGekk/csv-empty-value-master. Lead-authored-by: Mario Molina <mmolimar@gmail.com> Co-authored-by: Maxim Gekk <maxim.gekk@databricks.com> Signed-off-by: hyukjinkwon <gurwls223@apache.org>		2018-09-11 20:47:14 +08:00
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benchmarks	[SPARK-25306][SQL] Avoid skewed filter trees to speed up createFilter in ORC	2018-09-05 10:24:13 +08:00
src	[SPARK-17916][SPARK-25241][SQL][FOLLOW-UP] Fix empty string being parsed as null when nullValue is set.	2018-09-11 20:47:14 +08:00
pom.xml	[SPARK-25019][BUILD] Fix orc dependency to use the same exclusion rules	2018-08-06 12:00:39 -07:00