ThearchyHelios
76b485a0ca
审批质询遮罩收口(第 3 轮复核):标签列按作用域认取自哪个来源,UNION 另一支、子查询里的遮罩列流进标签列照收;取模、整除、整数相除按算出来的值认;CAST 的类型参数不当边界换
复核留下的一条 major(第 2 轮只修了一部分)和两条次要问题:
- 分档标签列:以前按名字认,从「所有名字都只装着标签」起往下剔。遮罩列原样选出(SELECT vip_level)时名字就是它自己,
永远剔不掉;结果的 UNION 按位置那一遍只往里加标签,另一支取的是遮罩列也不剔;派生来源里的 UNION 根本不按位置看。
于是标签在前、遮罩列在后(不起别名、别名不同、外层再套子查询、CTE 里的标签再 UNION),遮罩列经按原名选出的子查询、
以标签的别名传出,或者两个子查询 JOIN 起来同名,等级 1 撞上 THEN 1 都不收,WHERE vip_level = 1 在查询清单、事件、
质询工件里照原样封存(对基线是回退)。现在 _label_columns 按作用域认每一项取自哪个来源:结果的这一列在 UNION 的
每一支里都要是结果全为写死常量的 CASE / IIF,或者取自子查询、CTE、LATERAL 里只装着标签的一列(派生来源里的 UNION
也按位置看每一支,写了列名表的按列名表);取自数据源里的表的一律不算,哪怕和标签同名。没写表名的列,派生来源出
这一列的就是它(SQL 执行过,别的来源就没有同名的列,不然报列名有歧义),按这一列 USING、NATURAL 合成的除外;递归的
CTE、UNION 里落在某一支 * 里的列认不准,照收(多遮)
- 取模、整除:_arithmetic、_worked_out 补上 %、MOD、DIV、//(往零取整,同 SQL)。顺带 / 照数据源的算法算:SQLite、
Postgres 里两个写成整数的数相除只留整数部分(sqlglot 记在 typed 上),以前一律按小数算,age >= 25 AND age < 53 / 2
在 SQLite 里夹住了 25 却认不出;写成小数的(53.0 / 2)、MySQL、DuckDB 照小数算
- CAST 的类型参数(第 2 轮引入,只多遮):_halves 只收往上走得到这一边的字面量(_lifts),CAST(30000 AS DECIMAL(10, 2))
的 10、2 不再当成算出边界的数换掉,SQL 检查结果的片段里别处的 10、2 也不跟着换;_wraps 里 CAST 只算被转换的那个值,
Oracle 的 CAST … DEFAULT 0 ON CONVERSION ERROR 里的 0 照原样
- 模块说明的已知局限照实更新:标签列认得出、认不准的几种写法;认得出的算式补上取模、整除和整数相除,认不出的补上
位运算、POWER、CAST 改了值的
测试:单元补标签在前、遮罩列在后的八种写法(不起别名、别名不同、子查询里的 UNION、写了列名表的 CTE、CTE 里的标签再
UNION、经按原名选出的子查询传出、两个子查询 JOIN 同名、RIGHT JOIN USING 同名列),按作用域仍认得出的五种标签(外层连上
数据源里的表不写表名、按别的列 USING、两层子查询写了表名、UNION 两支、派生来源的 UNION 经 * 带出);取模、整除、整数
相除的六种写法和照小数算的三种;CAST 的类型参数和 DEFAULT。端到端补 UNION 标签在前的两种写法、取模和整数相除算出来的
边界。每处实现都逐个去掉验证过测试变红(十一个变异全红)
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