[jira] [Created] (SPARK-42286) Fix internal error for valid CASE WHEN expression with CAST when inserting into a table

["Runyao.Chen (Jira)" <ji...@apache.org>]

Runyao.Chen created SPARK-42286:
-----------------------------------

             Summary: Fix internal error for valid CASE WHEN expression with CAST when inserting into a table
                 Key: SPARK-42286
                 URL: https://issues.apache.org/jira/browse/SPARK-42286
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 3.4.0
            Reporter: Runyao.Chen


```

spark-sql> create or replace table es570639t1 as select x FROM values (1), (2), (3) as tab(x);
spark-sql> create or replace table es570639t2 (x Decimal(9, 0));
spark-sql> insert into es570639t2 select 0 - (case when x = 1 then 1 else x end) from es570639t1 where x = 1;

```

hits the following internal error
org.apache.spark.SparkException: [INTERNAL_ERROR] Child is not Cast or ExpressionProxy of Cast
 

Stack trace:
org.apache.spark.SparkException: [INTERNAL_ERROR] Child is not Cast or ExpressionProxy of Cast at org.apache.spark.SparkException$.internalError(SparkException.scala:78) at org.apache.spark.SparkException$.internalError(SparkException.scala:82) at org.apache.spark.sql.catalyst.expressions.CheckOverflowInTableInsert.checkChild(Cast.scala:2693) at org.apache.spark.sql.catalyst.expressions.CheckOverflowInTableInsert.withNewChildInternal(Cast.scala:2697) at org.apache.spark.sql.catalyst.expressions.CheckOverflowInTableInsert.withNewChildInternal(Cast.scala:2683) at org.apache.spark.sql.catalyst.trees.UnaryLike.$anonfun$mapChildren$5(TreeNode.scala:1315) at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:106) at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren(TreeNode.scala:1314) at org.apache.spark.sql.catalyst.trees.UnaryLike.mapChildren$(TreeNode.scala:1309) at org.apache.spark.sql.catalyst.expressions.UnaryExpression.mapChildren(Expression.scala:636) at org.apache.spark.sql.catalyst.trees.TreeNode.transformUpWithPruning(TreeNode.scala:570) at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformUpWithPruning$1(TreeNode.scala:570)
 

This internal error comes from `CheckOverflowInTableInsert``checkChild`, where we covered only `Cast` expr and `ExpressionProxy` expr, but not the `CaseWhen` expr.



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