[jira] [Created] (SPARK-28512) New optional mode: throw runtime exceptions on casting failures

["Gengliang Wang (JIRA)" <ji...@apache.org>]

Gengliang Wang created SPARK-28512:
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             Summary: New optional mode: throw runtime exceptions on casting failures
                 Key: SPARK-28512
                 URL: https://issues.apache.org/jira/browse/SPARK-28512
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Gengliang Wang


In popular DBMS like MySQL/PostgreSQL/Oracle, runtime exceptions are thrown on casting, e.g. cast('abc' as int) 
While in Spark, the result is converted as null silently. It is by design since we don't want a long-running job aborted by some casting failure. But there are scenarios that users want to make sure all the data conversion are correct, like the way they use MySQL/PostgreSQL/Oracle.

If the changes touch too much code, we can limit the new optional mode to table insertion first. By default the new behavior is disabled.



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