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Allow set operations over other mapping types #16813

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merged 1 commit into from
Aug 1, 2019

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@roji roji commented Jul 29, 2019

Including different mapping types on the two sides, as long as the result is compatible.

Fixes #16725

@ajcvickers
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@roji Remember to re-target to release/3.0 before merging. Marking as blocked for now as a reminder...

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Remember to re-target to release/3.0 before merging.

@roji roji changed the base branch from master to release/3.0 July 30, 2019 08:23
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roji commented Jul 30, 2019

@ajcvickers done

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Potential for bug.

Also add tests for more variety of SqlExpressions appearing with same and different kind of SqlExpression on both side.
-Unary
-SqlFunction
-SqlBinary
-Column
-SubSelect
-Constant
-Parameter

@roji roji force-pushed the MoreFlexibleSetOperations branch 2 times, most recently from cbe4ac9 to b6930c4 Compare July 31, 2019 17:07
Including different mapping types on the two sides, as long as the
result is compatible.

Fixes #16725
@roji roji force-pushed the MoreFlexibleSetOperations branch from b6930c4 to e85773b Compare July 31, 2019 21:04
@roji roji requested a review from smitpatel July 31, 2019 21:22
}

public override async Task Union_over_different_projection_types(bool isAsync, string leftType, string rightType)
{
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Asserting Sqls dynamically like this is nightmare to maintain test.
So we are down to 2 choice. Either split out each into different tests (sync/async can be together like other tests)
or run loops to generate queries to execute one by one. Essentially removing leftType/rightType from parameter of the test.

Like Convert_ToDecimal test

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Would have been better to receive this previously as I was asking for feedback.

To be sure I understand, you're saying it's more maintainable for us to have 72 manually-written SQL assertions? For comparison, Convert_ToDecimal has 8.

If you're not happy with the way the test looks, let me propose something. All of these test cases/assertions don't actually correspond to different code paths inside - the actual set operation logic doesn't care one bit if one side is a constant, a column, or a function call - as long as they return the same thing. In other words, coverage isn't actually increased. Maybe a single test per expression type (on both sides), plus one extra for different expression types could be sufficient.

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I think we should go with the tests as @roji has written them for now. We can file an issue to discuss as a team whether we in general like this pattern or not, and then follow up appropriately.

@roji roji merged commit a3a9bde into release/3.0 Aug 1, 2019
@ghost ghost deleted the MoreFlexibleSetOperations branch August 1, 2019 06:58
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Union/Concat fails at mapping anonymous types from Select
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