MySQL函数 statement_digest_text

此函数会把给定的sql语句标准化, 并添加占用符.

| statement_digest_text('select * from table_tbl where c1 = 1 and c2 = c3 or c4 = "text"') |
+------------------------------------------------------------------------------------------+
| SELECT * FROM `table_tbl` WHERE `c1` = ? AND `c2` = `c3` OR `c4` = ?                     |
+------------------------------------------------------------------------------------------+