Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/16733#discussion_r99255011
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala ---
@@ -29,7 +29,12 @@ private case object OracleDialect extends JdbcDialect {
override def getCatalystType(
--- End diff --
Aha, I see. you're right and it seems `JdbcUtils` always sets `scale`
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala#L285.
However, since I got some reports
(https://www.mail-archive.com/user@spark.apache.org/msg61280.html) from
spark-users, I made this pr. I feel some weird and I keep looking into this. I
appreciate your suggestions.
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