sunxiaoguang commented on code in PR #49335:
URL: https://github.com/apache/spark/pull/49335#discussion_r1910380266
##########
sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala:
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@@ -112,6 +151,19 @@ private case class MySQLDialect() extends JdbcDialect with
SQLConfHelper with No
} else {
super.visitAggregateFunction(funcName, isDistinct, inputs)
}
+
+ override def visitCast(expr: String, exprDataType: DataType, dataType:
DataType): String = {
+ val databaseTypeDefinition = dataType match {
+ // MySQL uses CHAR in the cast function for the type LONGTEXT
+ case StringType => "CHAR"
Review Comment:
This is the error for `SELECT CAST('123' AS LONGTEXT)`
<img width="1075" alt="image"
src="https://github.com/user-attachments/assets/2e9562cc-ede1-42de-bdd8-1864a2d8cf1f";
/>
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