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https://issues.apache.org/jira/browse/HIVE-4642?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Teddy Choi updated HIVE-4642:
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Attachment: HIVE-4642-1.patch
I wrote draft code. It needs more comments, tests, and refactoring.
I agree that FA generation will be a heavy job, so I didn't implemented it.
Common phone number patterns are covered with a simple fixed automaton. I will
add more simple automata.
There are already hard coded decisions, and more will come. So I introduced an
interface that generalizes decisions. It may reduce performance little bit.
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Class hierarchy:
AbstractFilterStringColLikeStringScalar
+ FilterStringColLikeStringScalar
+ FilterStringColRegExpStringScalar
AbstractFilter...#Checker
+ AbstractFilter...#BeginChecker
+ AbstractFilter...#EndChecker
+ AbstractFilter...#MiddleChecker
+ AbstractFilter...#NoneChecker
+ AbstractFilter...#AnyCharChecker
+ AbstractFilter...#ComplexChecker
+ FilterStringColRegExpStringScalar#PhoneNumberChecker
AbstractFilter...#CheckerFactory
+ Filter...Like...#LikeBeginCheckerFactory
+ Filter...Like...#LikeEndCheckerFactory
+ Filter...Like...#LikeMiddleCheckerFactory
+ Filter...Like...#LikeNoneCheckerFactory
+ Filter...Like...#LikeAnyCharCheckerFactory
+ Filter...Like...#LikeComplexCheckerFactory
+ Filter...RegExp...#RegExpBeginCheckerFactory
+ Filter...RegExp...#RegExpEndCheckerFactory
+ Filter...RegExp...#RegExpMiddleCheckerFactory
+ Filter...RegExp...#RegExpNoneCheckerFactory
+ Filter...RegExp...#RegExpAnyCharCheckerFactory
+ Filter...RegExp...#RegExpComplexCheckerFactory
+ Filter...RegExp...#RegExpPhoneNumberCheckerFactory
> Implement vectorized RLIKE and REGEXP filter expressions
> --------------------------------------------------------
>
> Key: HIVE-4642
> URL: https://issues.apache.org/jira/browse/HIVE-4642
> Project: Hive
> Issue Type: Sub-task
> Reporter: Eric Hanson
> Assignee: Teddy Choi
> Attachments: HIVE-4642-1.patch
>
>
> See title. I will add more details next week. The goal is (a) make this work
> correctly and (b) optimize it as well as possible, at least for the common
> cases.
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