数据库查询错误和 utf8mb4有关系

org.nutz.dao.DaoException: !Nutz SQL Error: 'select d.id from ding_user as d,wx_user as w where w.name=d.name and w.openid='oqqXTjszXViYud7EwQcCoECJbPcM''
PreparedStatement:
Caused by: java.sql.SQLException: Illegal mix of collations (utf8mb4_general_ci,IMPLICIT) and (utf8mb4_unicode_ci,IMPLICIT) for operation '='
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2483)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2441)
	at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1381)
	at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2831)
	at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2503)
	at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
	at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2828)
	at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:221)
	at com.alibaba.druid.pool.DruidPooledStatement.executeQuery(DruidPooledStatement.java:291)
	at org.nutz.dao.impl.sql.run.NutDaoExecutor._runSelect(NutDaoExecutor.java:246)
	at org.nutz.dao.impl.sql.run.NutDaoExecutor.exec(NutDaoExecutor.java:53)
	... 72 more

Rekoe

1楼•2333天前

已经做了表编码更新

| ding_user | CREATE TABLE `ding_user` (
  `id` varchar(128) COLLATE utf8mb4_unicode_ci NOT NULL,
  `name` varchar(128) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `phone` bigint(64) DEFAULT NULL,
  `wx_user_id` bigint(64) DEFAULT NULL,
  `email` varchar(128) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `ding_user_index` (`wx_user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci |

wendal

2楼•2333天前

解决了?

Rekoe

3楼•2333天前

@wendal 没有解决呢。我只是把表的结构贴了下，已经是utf8mb4 编码了，还是有这个错误

Rekoe

4楼•2333天前

解决方案

ALTER TABLE ding_user MODIFY COLUMN name VARCHAR(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

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