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Use limit to improve exists performance

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gongzhongqiang 2023-08-02 13:58:15 +08:00
parent 8677b0ed13
commit 4c9c191f62
1 changed files with 2 additions and 2 deletions
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4
mybatis-flex-core/src/main/java/com/mybatisflex/core/service/IService.java
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@ -418,7 +418,7 @@ public interface IService<T> {
* @return {@code true} 数据存在，{@code false} 数据不存在。 * @return {@code true} 数据存在，{@code false} 数据不存在。
*/ */
default boolean exists(QueryWrapper query) { default boolean exists(QueryWrapper query) {
return SqlUtil.toBool(count(query)); return CollectionUtil.isNotEmpty(getMapper().selectListByQuery(query.limit(1)));
} }
/** /**
@ -428,7 +428,7 @@ public interface IService<T> {
* @return {@code true} 数据存在，{@code false} 数据不存在。 * @return {@code true} 数据存在，{@code false} 数据不存在。
*/ */
default boolean exists(QueryCondition condition) { default boolean exists(QueryCondition condition) {
return SqlUtil.toBool(count(condition)); return CollectionUtil.isNotEmpty(getMapper().selectListByCondition(condition,1L));
} }
/** /**