Dilip Biswal created SPARK-25416:
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Summary: ArrayPosition may return incorrect result when right
expression is downcasted.
Key: SPARK-25416
URL: https://issues.apache.org/jira/browse/SPARK-25416
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.4.0
Reporter: Dilip Biswal
In ArrayPosition, we currently cast the right hand side expression to match the
element type of the left hand side Array. This may result in down casting and
may return wrong result or questionable result.
Example :
spark-sql> select array_position(array(1), 1.34);
1
spark-sql> select array_position(array(1), 'foo');
null
We should safely coerce both left and right hand side expressions.
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