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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/10/28 17:30:23 UTC

[GitHub] [beam] TheNeuralBit opened a new pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

TheNeuralBit opened a new pull request #15826:
URL: https://github.com/apache/beam/pull/15826


   `SqlExpressionChecker` just verifies that an expression produces a true result, while `ExpressionChecker` compares the result of an expression with an expected value. The latter produces much more helpful error messages, so we should use it everywhere. Currently the only usage of `SqlExpressionChecker` is in `BeamSqlDslSqlStdOperatorsTest.testStringFunctions` - replaced in this PR.
   
   `ValidatesRunner` compliance status (on master branch)
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   Examples testing status on various runners
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   Post-Commit SDK/Transform Integration Tests Status (on master branch)
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         <td>---</td>
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[GitHub] [beam] TheNeuralBit commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
TheNeuralBit commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954095561


   I didn't do the code archaeology to determine _why_ we do it this way (thanks @ibzib!), I just figured it was an oversight at some point. Since SqlExpressionChecker is providing some value I'm fine with reverting this for now.
   
   @kennknowles would it make sense to file a jira to get the JDBC test coverage another way?


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[GitHub] [beam] TheNeuralBit closed pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
TheNeuralBit closed pull request #15826:
URL: https://github.com/apache/beam/pull/15826


   


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[GitHub] [beam] kennknowles commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
kennknowles commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954081610


   I agree with the critique. Nothing so annoying as an assert that something is true/false. But I think we lose a lot of testing, unless the points above are improved.


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[GitHub] [beam] TheNeuralBit edited a comment on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
TheNeuralBit edited a comment on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954087467


   Should we be using `SqlExpressionChecker` for more checks then? Why just string functions? 
   
   It seems like this is a contrived way to get some test coverage of the JDBC path, perhaps we should just add some explicit tests for that?


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[GitHub] [beam] kennknowles commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
kennknowles commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954080936


   From the javadoc:
   
    - Tests a SQL expression is SQL true, not against a Java return type. Correctness relies on
             bootstrapped testing of literals and whatever operators, like `=` and `<` are
             used in the expression.
    - There is no implicit table to reference columns from, just literals.
    - Runs tests both via QueryTransform and also via JDBC driver.
    - Requires a pipeline to be provided where it will attach transforms.


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[GitHub] [beam] kennknowles commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
kennknowles commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954898255


   I'm not really sure. At this point some large amount of coverage is redundant because we use Calcite's codegen for some Calc rel's and the ZetaSQL reference implementation for others. I didn't look closely here to see if they are expressions that fall outside of that. So we really don't need to be exhaustively testing so much. (OTOH they are super cheap unit tests, I think... though the JDBC path maybe less so)


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[GitHub] [beam] ibzib commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
ibzib commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954068636


   This is pretty much a revert of #5851. I couldn't really grok why the original change was necessary though?
   
   R: @kennknowles 


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[GitHub] [beam] TheNeuralBit commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
TheNeuralBit commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954087467


   Should we be using `SqlExpressionChecker` for more checks then? Why just string functions?


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[GitHub] [beam] TheNeuralBit commented on pull request #15826: Minor: Replace usage of SqlExpressionChecker with ExpressionChecker

Posted by GitBox <gi...@apache.org>.
TheNeuralBit commented on pull request #15826:
URL: https://github.com/apache/beam/pull/15826#issuecomment-954068665


   Run Java_Examples_Dataflow PreCommit


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