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Decouple final output schema from expression evaluation so this copy can be avoided safely. #746

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zhexuany opened this issue May 21, 2019 · 0 comments
Open

Decouple final output schema from expression evaluation so this copy can be avoided safely. #746

zhexuany opened this issue May 21, 2019 · 0 comments
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@zhexuany
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tispark/core/src/main/scala/org/apache/spark/sql/TiStrategy.scala

Line 374 in e32fa0e

dagRequest.addRequiredColumn(ColumnRef.create(column.getName, source.table)) 

 if (AttributeSet(projectList.map(_.toAttribute)) == projectSet &&
        filterSet.subsetOf(projectSet)) {

can be avoided if we eliminate alias in projectList.
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@marsishandsome @zhexuany