trait AliasAwareOutputExpression extends SQLConfHelper
A trait that provides functionality to handle aliases in the outputExpressions.
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- abstract def outputExpressions: Seq[NamedExpression]
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- final def !=(arg0: Any): Boolean
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- final def ##: Int
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- val aliasCandidateLimit: Int
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- def conf: SQLConf
The active config object within the current scope.
The active config object within the current scope. See SQLConf.get for more information.
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- final def eq(arg0: AnyRef): Boolean
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- def hasAlias: Boolean
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- def projectExpression(expr: Expression): LazyList[Expression]
Return a stream of expressions in which the original expression is projected with
aliasMap.Return a stream of expressions in which the original expression is projected with
aliasMap.- Attributes
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- def strip(expr: Expression): Expression
This method can be used to strip expression which does not affect the result, for example: strip the expression which is ordering agnostic for output ordering.
This method can be used to strip expression which does not affect the result, for example: strip the expression which is ordering agnostic for output ordering.
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- def withSQLConf[T](pairs: (String, String)*)(f: => T): T
Sets all SQL configurations specified in
pairs, callsf, and then restores all SQL configurations.Sets all SQL configurations specified in
pairs, callsf, and then restores all SQL configurations.- Attributes
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- Deprecated
(Since version 9)