兼容性判定
公开资料依据 · 建议 PoC 复核支持度partial
严重度major
置信度low
依据规则my.syntax.group_by_with_rollup
怎么改
将 GROUP BY a, b WITH ROLLUP 改为 GROUP BY ROLLUP(a, b) 或显式 GROUPING SETS
判定说明
支持函数式 ROLLUP,但不接受 MySQL 后缀语法;GROUPING/HAVING、真实 NULL、汇总层级和结果排序仍需核对,建议 PoC 复核
库侧 / 应用侧路径
库侧改造
可行:按原汇总层级重写为 ROLLUP 或显式 GROUPING SETS
应用侧改造
可行:消费方若依赖小计行位置或 NULL 标记,需同步调整识别逻辑
推荐路线:db_side。验证建议:对照明细、小计、总计行数和值,并覆盖真实 NULL、GROUPING、HAVING 和显式 ORDER BY
规则样例
SELECT zone, state, COUNT(*) FROM master_data GROUP BY zone, state WITH ROLLUP
SELECT year, country, SUM(profit) FROM sales GROUP BY year, country WITH ROLLUP HAVING SUM(profit) > 0
SELECT zone, state, COUNT(*) FROM master_data GROUP BY ROLLUP(zone, state)
参考来源
- https://stackoverflow.com/questions/38428139/postgresqlhow-to-use-grouping-sets-cube-and-rollup-for-summary-totals
- https://dba.stackexchange.com/questions/62496/problem-translating-mysql-to-postgresql
- https://dev.mysql.com/doc/refman/8.4/en/group-by-modifiers.html
- https://www.postgresql.org/docs/16/sql-select.html
- https://github.com/orafce/orafce/blob/841978f4ec493492bb57fd12415959695cae1b64/README.asciidoc#L9-L267
- https://github.com/orafce/orafce/blob/841978f4ec493492bb57fd12415959695cae1b64/README.asciidoc#L269-L546
- https://github.com/orafce/orafce/blob/841978f4ec493492bb57fd12415959695cae1b64/README.asciidoc#L786-L943
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