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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/10/27 15:12:30 UTC

[GitHub] [spark] stwhit opened a new pull request #30161: [SPARK-33246][Docs] Correct documentation for null semantics of "NULL AND False"

stwhit opened a new pull request #30161:
URL: https://github.com/apache/spark/pull/30161


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   The documentation of the Spark SQL null semantics states that "NULL AND False" yields NULL.  This is incorrect.  "NULL AND False" yields False.
   
   ```
   Seq[(java.lang.Boolean, java.lang.Boolean)](
     (null, false)
   )
     .toDF("left_operand", "right_operand")
     .withColumn("AND", 'left_operand && 'right_operand)
     .show(truncate = false)
   
   +------------+-------------+-----+
   |left_operand|right_operand|AND  |
   +------------+-------------+-----+
   |null        |false        |false|
   +------------+-------------+-----+
   ```
   
   I propose the documentation be updated to reflect that "NULL AND False" yields False.
   
   This contribution is my original work and I license it to the project under the project’s open source license.
   
   ### Why are the changes needed?
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     1. If you propose a new API, clarify the use case for a new API.
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   This change improves the accuracy of the documentation.
   
   ### Does this PR introduce _any_ user-facing change?
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   Yes.  This PR introduces a fix to the documentation.
   
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   Since this is only a documentation change, no tests were added.


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[GitHub] [spark] maropu commented on pull request #30161: [SPARK-33246][SQL][DOCS] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
maropu commented on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717602994


   Thanks! Merged to master/3.0.


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[GitHub] [spark] maropu commented on pull request #30161: [SPARK-33246][Docs] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
maropu commented on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717602110


   Nice catch! LGTM


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[GitHub] [spark] AmplabJenkins commented on pull request #30161: [SPARK-33246][Docs] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717315457


   Can one of the admins verify this patch?


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[GitHub] [spark] AmplabJenkins commented on pull request #30161: [SPARK-33246][Docs] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717314501


   Can one of the admins verify this patch?


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[GitHub] [spark] AmplabJenkins removed a comment on pull request #30161: [SPARK-33246][Docs] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
AmplabJenkins removed a comment on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717314501


   Can one of the admins verify this patch?


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[GitHub] [spark] maropu closed pull request #30161: [SPARK-33246][SQL][DOCS] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
maropu closed pull request #30161:
URL: https://github.com/apache/spark/pull/30161


   


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[GitHub] [spark] maropu commented on pull request #30161: [SPARK-33246][SQL][DOCS] Correct documentation for null semantics of "NULL AND False"

Posted by GitBox <gi...@apache.org>.
maropu commented on pull request #30161:
URL: https://github.com/apache/spark/pull/30161#issuecomment-717604909


   NOTE: I added your jira account in the contributor list. Thanks for the first contribution, @stwhit !


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