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Query: We force materialization of query sources for queries with GroupJoin that is not flattened by SelectMany #7884

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maumar opened this issue Mar 15, 2017 · 1 comment
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Query: We force materialization of query sources for queries with GroupJoin that is not flattened by SelectMany #7884

maumar opened this issue Mar 15, 2017 · 1 comment
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area-perf area-query closed-out-of-scope This is not something that will be fixed/implemented and the issue is closed. type-enhancement

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@maumar
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maumar commented Mar 15, 2017

Currently for queries that contain GroupJoin clause, which is not afterwards flattened by a SelectMany, we force materialization on both outer and inner query sources. This is because for the client _GroupJoin method we don't always know how to properly divide inners into groups - specifically, when the outer (key) is not present in the final projection.

This is to track remaning work after fixing #6647, where we stopped materializing query sources for queries with GroupJoins wrapped in SelectMany - which are the most popular use cases, e.g. optional navigations.
@ajcvickers ajcvickers added this to the Backlog milestone Mar 17, 2017
@smitpatel
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Irrelevant

@smitpatel smitpatel removed this from the Backlog milestone Mar 10, 2020
@ajcvickers ajcvickers added the closed-out-of-scope This is not something that will be fixed/implemented and the issue is closed. label Mar 10, 2022
@ajcvickers ajcvickers reopened this Oct 16, 2022
@ajcvickers ajcvickers closed this as not planned Won't fix, can't repro, duplicate, stale Oct 16, 2022
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area-perf area-query closed-out-of-scope This is not something that will be fixed/implemented and the issue is closed. type-enhancement
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