[jira] [Created] (SPARK-38977) Fix schema pruning with correlated subqueries

["Anton Okolnychyi (Jira)" <ji...@apache.org>]

Anton Okolnychyi created SPARK-38977:
----------------------------------------

             Summary: Fix schema pruning with correlated subqueries
                 Key: SPARK-38977
                 URL: https://issues.apache.org/jira/browse/SPARK-38977
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.2.1, 3.2.0, 3.3.0
            Reporter: Anton Okolnychyi


Schema pruning fails for some queries with correlated subqueries.


{noformat}
sql(
  s"""SELECT name FROM contacts c
     |WHERE
     | EXISTS (SELECT 1 FROM ids i WHERE i.value = c.id)
     | AND
     | EXISTS (SELECT 1 FROM first_names n WHERE c.name.first = n.value)
     |""".stripMargin)
{noformat}

{noformat}
[info]   org.apache.spark.SparkException: Failed to merge fields 'value' and 'value'. Failed to merge incompatible data types int and string
[info]   at org.apache.spark.sql.errors.QueryExecutionErrors$.failedMergingFieldsError(QueryExecutionErrors.scala:936)
{noformat}








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