Generate a unexpected Actual SQL

ShardingSphere version: 5.1.0 Database: Mysql

Properties:

spring:
  shardingsphere:
    datasource:
      names: db0
    props:
      sql-show: true
    rules:
      sharding:
        tables:
          book:
            actual-data-nodes: db0.book_$->{0..2}
            table-strategy:
              standard:
                sharding-column: id
                sharding-algorithm-name: table-inline
            key-generate-strategy:
              column: id
              key-generator-name: snowflake
        sharding-algorithms:
          table-inline:
            type: INLINE
            props:
              algorithm-expression: book_$->{id % 3}

Logic SQL:

SELECT
	UPPER(
	LEFT ( bg.class_no, 1 )) class_char,
	count(
	DISTINCT ( bg.class_no )) class_num,
	count( b.id ) book_num,
	sum( b.price ) sum_price 
FROM
	book b
	JOIN bibliography bg ON b.bibliography_id = bg.id 
WHERE
	b.user_id = ? 
GROUP BY
	class_char

Using logic sql and no sharding result:

classChar	classNum	bookNum	sumPrice
A	2	3	89.10
B	2	3	121.60
D	2	2	38.80
Z	1	2	5.52

Actual SQL:

SELECT DISTINCT
	UPPER(
	LEFT ( bg.class_no, 1 )) class_char,
	bg.class_no class_num,
	count( b.id ) book_num,
	sum( b.price ) sum_price 
FROM
	book_0 b
	JOIN bibliography bg ON b.bibliography_id = bg.id 
WHERE
	b.user_id = ? 
ORDER BY
	class_char ASC

unexpected result:

classChar	classNum	bookNum	sumPrice
A	2	6	202.90
Z	1	4	52.12

Maybe it is a bug? I don’t know. 😦 Please give me some help. The sql file: demo1.zip

[github-actions[bot]]

Hello , this issue has not received a reply for several days. This issue is supposed to be closed.

[strongduanmu]

@cucuzi I will check the rewrite logic.