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temporal tables - query part #25060

Merged
merged 1 commit into from
Jul 13, 2021
Merged

temporal tables - query part #25060

merged 1 commit into from
Jul 13, 2021

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maumar
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@maumar maumar commented Jun 8, 2021

  • query apis for temporal operations
  • query root creator service that can now construct query root expressions in nav expansion

tests for now are simply converted exisiting tests

  • used the original model & data
  • map entities to temporal in the model configuration
  • modify the data (remove or change values),
  • manually change the history table to make history deterministic (rather than based on current date),
  • added visitor to inject temporal operation to every query, which "time travels" to before the modifications above were made, so we should still get the same results as non-temporal & not modified data

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maumar commented Jun 8, 2021

for now we still project temporal columns - I added the annotation to the model to filter them out, but hit a bunch of issues in the shaper etc, where we are expecting certain number of columns in the reader, which all need to be tested and fixed. So decided to do the easy thing now to get the query design in place and when thats done, handle the part that removes period columns from query

maumar
maumar commented Jun 8, 2021
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test/EFCore.SqlServer.FunctionalTests/Query/TemporalManyToManyQuerySqlServerFixture.cs

};

foreach (var historyTableInfo in historyTableInfos)
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I will get some sort of helper for this to DRY

@maumar maumar force-pushed the temporal_query_draft branch 2 times, most recently from 6383d70 to 1463926 Compare July 7, 2021 22:51
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maumar commented Jul 7, 2021

new version up @smitpatel

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Looks good, few minor comments. API review will check naming of things.

@maumar maumar marked this pull request as ready for review July 12, 2021 18:21
@maumar
query part
4b25a88 
- query apis for temporal operations
- query root creator service that can now construct query root expressions in nav expansion

tests for now are simply converted exisiting tests
- used the original model & data
- map entities to temporal in the model configuration
- modify the data (remove or change values),
- manually change the history table to make history deterministic (rather than based on current date),
- added visitor to inject temporal operation to every query, which "time travels" to before the modifications above were made, so we should still get the same results as non-temporal & not modified data
@maumar maumar merged commit 4b25a88 into main Jul 13, 2021
@maumar maumar deleted the temporal_query_draft branch July 13, 2021 07:53
@ajcvickers ajcvickers mentioned this pull request Jul 29, 2021
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dgmagno
dgmagno reviewed Oct 2, 2023
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src/EFCore.SqlServer/Extensions/SqlServerQueryableExtensions.cs
DateTime pointInTime)
where TEntity : class
{
Check.NotNull(source, nameof(source));
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Why all temporal extensions are on DbSet<TEntity> instead of IQueryable<TEntity>?

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Because these apply to a table in the database, which is represented by a DbSet, and not on any arbitrary IQueryable.

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@dgmagno dgmagno dgmagno left review comments

@roji roji roji left review comments

@AndriySvyryd AndriySvyryd AndriySvyryd left review comments

@smitpatel smitpatel smitpatel approved these changes

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@maumar @smitpatel @dgmagno @roji @AndriySvyryd