[6.0.1] Use a unique identifier for variables during insert #26679
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bricelam
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Nov 15, 2021
AndriySvyryd
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ajcvickers
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Fixes #26632
Description
When the entity types have store-generated primary keys invalid SQL is produced when a single entity of one type as well as 3 or more (or the amount specified in
MinBatchSize) are inserted together.Customer impact
SaveChangesproduces invalid SQL that results in an exception. The workaround would be to callSaveChangesafter each batch of specific entity type is added, but this isn't always practical.How found
Customer reported on 6.0
Regression
Yes, this worked in 5.0. Introduced in #25718
Testing
Added test for this scenario.
Risk
Low, the change has very predictable impact. Also added a quirk mode.