[SPARK-12139][SQL] REGEX Column Specification for Hive Queries #10137
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Can one of the admins verify this patch? |
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Thanks for the pull request. I'm going through a list of pull requests to cut them down since the sheer number is breaking some of the tooling we have. Due to lack of activity on this pull request, I'm going to push a commit to close it. Feel free to reopen it or create a new one. |
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When executing a query of the form
Select
(a)?.from A,Hive interprets this query as a regular expression, which can be supported in the hive parser for spark
If a columns is specified in backticks (eg. (ds)?+.+), the hive parser will treat that as a regular expression and 'expand' the columns similar to a *, on columns that match the regex.