flink sql jdbc 只要含有group by 语句就会报错怎么办？

|INSERT INTO pvuv_sink |SELECT | user_id,item_id,category_id,count(1) as cnt |FROM user_log |group by user_id,item_id,category_id 以上是报错得sql 11:21:57,157 ERROR org.apache.flink.api.java.io.jdbc.JDBCUpsertOutputFormat - JDBC executeBatch error, retry times = 1 java.sql.SQLException: No operations allowed after statement closed.

正常sql，可以插入mysql |INSERT INTO pvuv_sink |SELECT | user_id,item_id,category_id,1

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