spark技术分享EquivalentExpressions
EquivalentExpressions is…FIXME
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Equivalent sets of expressions, i.e. semantically equal expressions by their Used when…FIXME |
addExprTree Method
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addExprTree(expr: Expression): Unit |
addExprTree…FIXME
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Note
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addExprTree is used when CodegenContext is requested to subexpressionElimination or subexpressionEliminationForWholeStageCodegen.
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addExpr Method
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addExpr(expr: Expression): Boolean |
addExpr…FIXME
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Note
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Getting Equivalent Sets Of Expressions — getAllEquivalentExprs Method
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getAllEquivalentExprs: Seq[Seq[Expression]] |
getAllEquivalentExprs takes the values of all the equivalent sets of expressions.
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Note
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getAllEquivalentExprs is used when CodegenContext is requested to subexpressionElimination or subexpressionEliminationForWholeStageCodegen.
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