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Attribute Named Leaf Expressions

Attribute is an extension of the LeafExpression and NamedExpression abstractions for named leaf expressions.

Attributes are used by QueryPlan to build the schema of the structured query (it represents).

Contract

newInstance

newInstance(): Attribute

Note

newInstance is part of the NamedExpression abstraction but changes the return type to Attribute (from the base NamedExpression).

withDataType

withDataType(
  newType: DataType): Attribute

withExprId

withExprId(
  newExprId: ExprId): Attribute

withMetadata

withMetadata(
  newMetadata: Metadata): Attribute

withName

withName(
  newName: String): Attribute

withNullability

withNullability(
  newNullability: Boolean): Attribute

withQualifier

withQualifier(
  newQualifier: Seq[String]): Attribute

Implementations

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