spark技术分享CreateNamedStructLike Contract
CreateNamedStructLike is the base of Catalyst expressions that FIXME.
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package org.apache.spark.sql.catalyst.expressions trait CreateNamedStructLike extends Expression { // no required properties (vals and methods) that have no implementation } |
CreateNamedStructLike is not nullable.
CreateNamedStructLike is foldable only if all value expressions are.
| CreateNamedStructLike | Description |
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| Name | Description |
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Catalyst expressions for names |
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Catalyst expressions for values |
Checking Input Data Types — checkInputDataTypes Method
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checkInputDataTypes(): TypeCheckResult |
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Note
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checkInputDataTypes is part of the Expression Contract to verify (check the correctness of) the input data types.
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checkInputDataTypes…FIXME
Evaluating Expression — eval Method
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eval(input: InternalRow): Any |
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Note
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eval is part of Expression Contract for the interpreted (non-code-generated) expression evaluation, i.e. evaluating a Catalyst expression to a JVM object for a given internal binary row.
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eval…FIXME
