HyukjinKwon commented on a change in pull request #32605:
URL: https://github.com/apache/spark/pull/32605#discussion_r644477321
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File path: sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala
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@@ -94,4 +95,11 @@ private case object MySQLDialect extends JdbcDialect {
override def getTableCommentQuery(table: String, comment: String): String = {
s"ALTER TABLE $table COMMENT = '$comment'"
}
+
+ override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+ // See SPARK-35446: MySQL treats REAL as a synonym to DOUBLE by default
+ // We override getJDBCType so that FloatType is mapped to FLOAT instead
+ case FloatType => Option(JdbcType("FLOAT", java.sql.Types.FLOAT))
Review comment:
@mariosmeim-db sorry one last thing. can we update migration guide too?
https://github.com/apache/spark/blob/master/docs/sql-migration-guide.md
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