yaooqinn commented on code in PR #49453:
URL: https://github.com/apache/spark/pull/49453#discussion_r1914409584
##########
sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala:
##########
@@ -112,6 +112,19 @@ 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"
+ // MySQL uses SIGNED INTEGER in the cast function for the types
SMALLINT, INTEGER and BIGINT
+ case ShortType | IntegerType | LongType => "SIGNED INTEGER"
Review Comment:
+1
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