object IdentifierResolution extends AliasHelper with EvalHelper
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- IdentifierResolution
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- final def eq(arg0: AnyRef): Boolean
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- def equals(arg0: AnyRef): Boolean
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- def evalIdentifierExpr(expr: Expression): Seq[String]
- def getAliasMap(exprs: Iterable[NamedExpression]): AttributeMap[Alias]
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- AliasHelper
- def getAliasMap(plan: Aggregate): AttributeMap[Alias]
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- AliasHelper
- def getAliasMap(plan: Project): AttributeMap[Alias]
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- final def getClass(): Class[_ <: AnyRef]
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- final def isInstanceOf[T0]: Boolean
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- final def mergeAliases(alias: Alias): Alias
Merge an Alias(Alias(x)) into Alias(x) preserving metadata.
Merge an Alias(Alias(x)) into Alias(x) preserving metadata.
If the outer alias has explicit metadata, it is preserved. Else if the inner alias has explicit metadata, the result has explicit outer.metadata. Else both are deriving the metadata. the result is deriving metadata, with the union of noninheritable keys.
- alias
An Alias with a child Alias, Alias(Alias(x))
- returns
The merged alias, Alias(x)
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- AliasHelper
- final def mergeAndTrimAliases(alias: Alias): Alias
Merge any stack of aliases under the top-level alias, and then drops any aliases deeper in the expression tree.
Merge any stack of aliases under the top-level alias, and then drops any aliases deeper in the expression tree. So Alias1(Alias2(Alias3(Foo(Alias4(x))))) becomes Alias5(Foo(x)) where Alias5 preserves the metadata of Alias{1,2,3} and the name and exprId of Alias1. Alias4 is simply removed.
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- def prepareForEval(e: Expression): Expression
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- EvalHelper
- def replaceAlias(expr: Expression, aliasMap: AttributeMap[Alias]): Expression
Replace all attributes, that reference an alias, with the aliased expression
Replace all attributes, that reference an alias, with the aliased expression
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- AliasHelper
- def replaceAliasButKeepName(expr: NamedExpression, aliasMap: AttributeMap[Alias]): NamedExpression
Replace all attributes, that reference an alias, with the aliased expression, but keep the name of the outermost attribute.
Replace all attributes, that reference an alias, with the aliased expression, but keep the name of the outermost attribute.
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- final def synchronized[T0](arg0: => T0): T0
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- def toString(): String
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- def trimAliases(e: Expression): Expression
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- AliasHelper
- def trimNonTopLevelAliases[T <: Expression](e: T): T
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- AliasHelper
- final def wait(arg0: Long, arg1: Int): Unit
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- final def wait(arg0: Long): Unit
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- Deprecated
(Since version 9)