beliefer commented on code in PR #40359:
URL: https://github.com/apache/spark/pull/40359#discussion_r1132157169
##########
sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala:
##########
@@ -291,4 +291,22 @@ private case object MySQLDialect extends JdbcDialect with
SQLConfHelper {
throw QueryExecutionErrors.unsupportedDropNamespaceRestrictError()
}
}
+
+ class MySQLSQLQueryBuilder(dialect: JdbcDialect, options: JDBCOptions)
+ extends JdbcSQLQueryBuilder(dialect, options) {
+
+ override def build(): String = {
+ if (limit < 1 && offset > 0) {
+ val offsetClause = dialect.getOffsetClause(offset)
+ options.prepareQuery +
+ s"SELECT $columnList FROM ${options.tableOrQuery}
$tableSampleClause" +
+ s" $whereClause $groupByClause $orderByClause LIMIT
18446744073709551610 $offsetClause"
Review Comment:
MySQL doesn't support offset without limit.
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