SQL 修饰

Seata 的隔离级别默认为读未提交，该模式下本文表中的 select 语句的 SQL 修饰用法都是支持的；使用 for update 代理可以让 Seata 达到读已提交，该模式下 select 语句的用法只能部分支持。

DML 语句支持

类型	SQL 实例	是否支持
AND & OR	UPDATE … WHERE col_name1=expr1 AND col_name2= expr2	是
LIKE	UPDATE ... WHERE col_name1 LIKE 'NE'	是
通配符	UPDATE ... WHERE col_name1 LIKE 'NE%'	是
BETWEEN	UPDATE ... WHERE col_name1 BETWEEN expr1 AND expr2	是
ON DUPLICATE	INSERT INTO tb1_name [(col_name,...)]VALUES (\{expr | DEFAULT},...),(...),...[ ON DUPLICATE KEY UPDATE col_name=expr, ... ]	是

Select 语句支持

类型	SQL 实例	读未提交	读已提交
AND & OR	SELECT * FROM tb1_name WHERE col_name1=expr1 AND col_name2= expr2	是	是
ORDER BY	SELECT col_name1, col_name2 FROM tb1_name ORDER BY col_name1	是	是
GROUP BY	SELECT col_name1, col_name2 FROM tb1_name GROUP BY col_name1	是	是
LIKE	SELECT col_name1, col_name2 FROM tb1_name WHERE col_name1 LIKE 'NE'	是	是
通配符	SELECT col_name1, col_name2 FROM tb1_name WHERE col_name1 LIKE 'NE%'	是	是
EXISTS	SELECT col_name1, col_name2 FROM tb1_name WHERE EXISTS (expr1)	是	是
IN	SELECT col_name1, col_name2 FROM tb1_name WHERE col_name1 IN (expr1, expr2,...)	是	是
BETWEEN	SELECT col_name1, col_name2 FROM tb1_name WHERE col_name1 BETWEEN expr1 AND expr2	是	是
ON DUPLICATE	INSERT INTO tb1_name [(col_name,...)]VALUES ({expr | DEFAULT},...),(...),...[ ON DUPLICATE KEY UPDATE col_name=expr, ... ]	是	是
ALIASES	SELECT t1. col_name1, t2.col_name2 FROM tb1_name AS t1, tb2_name AS t2 WHERE t1. col_name=expr AND t2. col_name=expr	是	是
TOP	SELECT TOP 2 * FROM tb1_name	是	是
LIMIT	SELECT col_name1, col_name2 FROM tb1_name LIMIT 5	是	是
JOININNER JOINLEFT JOINRIGHT JOINFULL JOIN	SELECT col_name1, col_name2 FROM tb1_name JOIN tb2_name>ON tb1_name. col_name1= tb2_name. col_name1	是	否
UNIONUNION ALLSELECT INTO	SELECT col_name1, col_name2 FROM tb1_name UNION SELECT col_name1, col_name2 FROM tb2_name	是	否