bc6ea614ad
## What changes were proposed in this pull request? ### Fixes a `scala.MatchError` in the `element_at` operation - [SPARK-24348](https://issues.apache.org/jira/browse/SPARK-24348) When calling `element_at` with a wrong first operand type an `AnalysisException` should be thrown instead of `scala.MatchError` *Example:* ```sql select element_at('foo', 1) ``` results in: ``` scala.MatchError: StringType (of class org.apache.spark.sql.types.StringType$) at org.apache.spark.sql.catalyst.expressions.ElementAt.inputTypes(collectionOperations.scala:1469) at org.apache.spark.sql.catalyst.expressions.ExpectsInputTypes$class.checkInputDataTypes(ExpectsInputTypes.scala:44) at org.apache.spark.sql.catalyst.expressions.ElementAt.checkInputDataTypes(collectionOperations.scala:1478) at org.apache.spark.sql.catalyst.expressions.Expression.resolved$lzycompute(Expression.scala:168) at org.apache.spark.sql.catalyst.expressions.Expression.resolved(Expression.scala:168) at org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveAliases$$anonfun$org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveAliases$$assignAliases$1$$anonfun$apply$3.applyOrElse(Analyzer.scala:256) at org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveAliases$$anonfun$org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveAliases$$assignAliases$1$$anonfun$apply$3.applyOrElse(Analyzer.scala:252) at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289) at org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289) at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:70) at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:288) ``` ## How was this patch tested? unit tests Author: Vayda, Oleksandr: IT (PRG) <Oleksandr.Vayda@barclayscapital.com> Closes #21395 from wajda/SPARK-24348-element_at-error-fix. |
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