EquivalentExpressions¶

[[internal-registries]] .EquivalentExpressions's Internal Properties (e.g. Registries, Counters and Flags) [cols="1,2",options="header",width="100%"] |=== | Name | Description

| [[equivalenceMap]] equivalenceMap | Equivalent sets of expressions, i.e. semantically equal expressions/Expression.md[expressions] by their Expr "representative"

Used when...FIXME |===

=== [[addExprTree]] addExprTree Method

[source, scala]¶

addExprTree(expr: Expression): Unit¶

addExprTree...FIXME

NOTE: addExprTree is used when CodegenContext is requested to subexpressionElimination or subexpressionEliminationForWholeStageCodegen.

=== [[addExpr]] addExpr Method

[source, scala]¶

addExpr(expr: Expression): Boolean¶

addExpr...FIXME

[NOTE]¶

addExpr is used when:

• EquivalentExpressions is requested to <>

* PhysicalAggregation is requested to PhysicalAggregation.md#unapply[destructure an Aggregate logical operator]¶

=== [[getAllEquivalentExprs]] Getting Equivalent Sets Of Expressions -- getAllEquivalentExprs Method

[source, scala]¶

getAllEquivalentExprs: Seq[Seq[Expression]]¶

getAllEquivalentExprs takes the values of all the <>.

getAllEquivalentExprs is used when CodegenContext is requested to subexpressionElimination or subexpressionEliminationForWholeStageCodegen.