Query: Remove EntityQueryableExpressionVisitor and integrate function… #16299
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maumar
approved these changes
Jun 27, 2019
…ality in QueryableMethodTranslatingVisitor Issue: We did 2 pass in ExpressionTree to convert entityQueryables to shapedQueries and then translate/compose over them. Since we mutate the ShapedQueryExpression.QueryExpression in place, (reference to query expression are in shaper expression so it is not easy to make it immutable) if we try to translate something and fail then there is no way for us to try translating smaller part since we already mutated the ET. By integrating functionality in translation pipeline, if we fail to translate, our initial expression would still be intact (since it does not contain shapedQuery This is required for supporting collections/single non-scalar in projection.
Except for the subquery case This visitor should only translate methods on Queryable so it should not do base eval for others. All other methods should be passed through SqlTranslator (as they appear inside a lambda) For subquery, we don't want to throw since we don't know if the subquery has client methods or not (projection case) This is required for supporting collections/single non-scalar in projection.
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…ality in QueryableMethodTranslatingVisitor
Issue:
We did 2 pass in ExpressionTree to convert entityQueryables to shapedQueries and then translate/compose over them.
Since we mutate the ShapedQueryExpression.QueryExpression in place,
(reference to query expression are in shaper expression so it is not easy to make it immutable)
if we try to translate something and fail then there is no way for us to try translating smaller part since we already mutated the ET.
By integrating functionality in translation pipeline, if we fail to translate, our initial expression would still be intact (since it does not contain shapedQuery
This is required for supporting collections/single non-scalar in projection.