如何从算术关系

Question

你会如何解析（这是一个简单的例子）：${table_1} + ${table_2} + ${table_3} 并生成一个SQL查询，如：

WITH TMP_1 AS (SELECT date, quantity FROM table_1), TMP_2 AS (SELECT date, quantity FROM table_2), TMP_3 AS (SELECT date, quantity FROM table_3)
SELECT time_bucket('1 day', date) AS date, sum(quantity) AS sum FROM ( SELECT date, quantity FROM TMP_1 UNION ALL SELECT date, quantity FROM TMP_2 UNION ALL SELECT date, quantity FROM TMP_3 ) AS res_1 GROUP BY 1 ORDER BY 1;

您知道任何可以转换为SQL查询的伪语言

更新1

关系可以根据用户输入而变化：${table_1} + ${table_2} * ( ${table_3} * 60 )

Answer 1

您可以使用sql本身：

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