org.apache.spark.sql.catalyst.analysis.CoerceArguments.scala Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.spark.sql.catalyst.analysis
import org.apache.spark.sql.AnalysisException
import org.apache.spark.sql.catalyst.expressions.Cast
import org.apache.spark.sql.catalyst.plans.logical.{CallCommand, LogicalPlan}
import org.apache.spark.sql.catalyst.rules.Rule
/* This file is based on source code from the Iceberg Project (http://iceberg.apache.org/), licensed by the Apache
* Software Foundation (ASF) under the Apache License, Version 2.0. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. */
/**
* Coercion of procedure arguments rule.
*
* Most of the content of this class is referenced from Iceberg's ProcedureArgumentCoercion.
*/
object CoerceArguments extends Rule[LogicalPlan] {
override def apply(plan: LogicalPlan): LogicalPlan = plan.resolveOperators {
case call @ CallCommand(procedure, arguments) if call.resolved =>
val parameters = procedure.parameters
val newArguments = arguments.zipWithIndex.map {
case (argument, index) =>
val parameter = parameters(index)
val parameterType = parameter.dataType
val argumentType = argument.dataType
if (parameterType != argumentType && !Cast.canUpCast(argumentType, parameterType)) {
throw new AnalysisException(
s"Cannot cast $argumentType to $parameterType of ${parameter.name}.")
}
if (parameterType != argumentType) {
Cast(argument, parameterType)
} else {
argument
}
}
if (newArguments != arguments) {
call.copy(args = newArguments)
} else {
call
}
}
}