Github user yjshen commented on a diff in the pull request:
https://github.com/apache/spark/pull/8049#discussion_r36710695
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
---
@@ -348,26 +348,76 @@ private[sql] object DataSourceStrategy extends
Strategy with Logging {
Some(sources.EqualTo(a.name, v))
case expressions.EqualTo(Literal(v, _), a: Attribute) =>
Some(sources.EqualTo(a.name, v))
+ case expressions.EqualTo(Cast(a: Attribute, _), Literal(v, _))
+ if a.dataType == DateType || a.dataType == TimestampType =>
+ Some(sources.EqualTo(a.name, v))
--- End diff --
when we are comparing DateType column with a String literal, we could not
cast the String literal value to DateType since it would `eval` to the inner
representation of `DateType`, i.e. int, which means nothing for JDBC source.
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