ExpectsInputTypes Expressions¶

ExpectsInputTypes is an extension of the Expression abstraction for Catalyst Expressions that can define the expected types from child expressions.

Contract¶

inputTypes¶

inputTypes: Seq[AbstractDataType]

Expected AbstractDataTypes of the child expressions

Used when:

• ImplicitTypeCasts utility (as TypeCoercionRule) is used totransform
• ExpectsInputTypes is requested to checkInputDataTypes

Implementations¶

• HigherOrderFunction
• JsonToStructs
• others

checkInputDataTypes¶

checkInputDataTypes(): TypeCheckResult

checkInputDataTypes is part of the Expression abstraction.

checkInputDataTypes checks that the expected inputTypes are the DataTypes of the evaluation of the child expressions.