planner, executor: fix the logic for inline projection of executors #45158
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| p.SetChildren(subPlan) | ||
| } | ||
| // The limit missed its output cols via the protobuf. | ||
| // We need to add it back and do a ResolveIndicies for the later inline projection. |
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limit schema will not always like what its children are, like its children are projection, and it may have been eliminated
| shallowColSlice := make([]*expression.Column, p.schema.Len()) | ||
| copy(shallowColSlice, p.schema.Columns) | ||
| p.schema = expression.NewSchema(shallowColSlice...) | ||
| for i := 0; i < colsNeedResolving; i++ { |
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the only thing we can trust is the column.Index
while there will be some same cols ref to single one problems
What problem does this PR solve?
Issue Number: close #45112
Problem Summary:
What is changed and how it works?
The Physical Projection Elimination permits the case that the parent plan has a column which cannot be found by the child(ren).
The only thing we can rely on during the execution phase is the
Column.Index.Check List
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