关键要点
研究表明,PHP MySQL 的 WHERE 子句用于在 SELECT、UPDATE、DELETE 等 SQL 语句中过滤数据,精确定位符合条件的记录。它似乎通过在查询中添加条件(如 WHERE id 1)来限制结果集,支持多种运算符(如…
LikeSimplification 会做优化
/*** Simplifies LIKE expressions that do not need full regular expressions to evaluate the condition.* For example, when the expression is just checking to see if a string starts with a given* pattern.*/
object LikeSimplificati…