ERR_SPARK_SQL_LEGACY_UNION_SUPPORT: Your current Spark version doesn’t support UNION clause but only supports UNION ALL, which does not remove duplicates

The Spark SQL cannot be executed because it incudes a UNION clause that is not supported by this version of Spark

Remediation

If you’re running a stack recipe with Distinct rows post-filter there are following possibilities:

• Use stack recipe without distinct postfilter + create a distinct recipe for a result of a stack recipe

• Apply distinct recipe on each of the stacked datasets and then stack them

• Create a Spark SQL recipe with a query that uses UNION ALL and then wrap the whole quere with SELECT DISTINCT {your column names} from {select with UNION ALL}