getNextException: PSQLException - Too many update results were returned. Has anyone else run into this? I have searched far and wide for an explanation (including here) but have not found an answer yet. I assume this error is coming up from the JDBC driver? The curious thing is that the...
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 3 1. 如果想实现在Map中存放多条记录,需要做以下调整:思路:重写ResultHandler接口,,然后用SqlSession 的select方法,...
public <T> T selectOne(String statement, Object parameter) { // Popular vote was to return null on 0 results and throw exception on too many. List<T> list = this.selectList(statement, parameter); if (list.size() == 1) { return list.get(0); } else if (list.size() > 1) { t...
[IMPROVE]when database contains too many table, connect to database very snow [IMPROVE]better ui for setting page [IMPROVE]mybatis spring support * and ** wildcard [New]method name generate sql support common mapper and mybatisPlus new and old version [IMPROVE]sql param auto complete with...
bruce ge Compatible with IntelliJ IDEA (Ultimate, Community), Android Studioand1 more Plugin Versions Compatibility: IntelliJ IDEA Ultimate Channels: Version Compatibility Range Update Date Release 2021051.0 3.3.8+2321 2023.2+ Jan 13, 2025 Download ...
这里需要注意的是使用selectOne时需要保证数据库中顶多查询出一条数据,否则就会报错nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 ③ selectBatchIds ...
MyBatis使用 作为Spring框架的好伙伴,我们要熟悉在 Spring 和 SpringBoot 中的使用。 Spring 引入依赖 <!-- 导入Mybatis所需的依赖--><dependencies><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version></dependency><dependency><groupId>org.mybatis<...
size() > 1) { throw new TooManyResultsException("Expected one result (or null) to be returned by selectOne(), but found: " + list.size()); } else { return null; } @Override public <E> List<E> selectList(String statement, Object parameter) { // RowBounds就是分页参数 return ...
list = this.selectList(statement, parameter); if (list.size() == 1) { return list.get(0); } else if (list.size() > 1) { throw new TooManyResultsException("Expected one result (or null) to be returned by selectOne(), but found: " + list.size()); } else { return null; }...
我们知道sql的类型是可以通过关键字来判断的,如select/update/delete/insert。那么在Mybatis中哪里能输入sql呢? 一种有2种方式。 在Mapper.xml中直接编写sql,如下示例。 <?xmlversion="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd...