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我正在使用 EclipseIndigo、EclipseLink 和 MySQL 我有一个名为 condition 的表,我需要使用该名称保留它,但是当我"Query qb = em.createQuery("SELECT c FROM Condition c ")"在 eclipse 中执行此命令时,它会引发此异常:

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'condition' at line 1
    at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.Util.getInstance(Util.java:386)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2683)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2144)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2310)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeSelect(DatabaseAccessor.java:931)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:607)

我知道 MySQL 有一个名为 condition 的命令,这就是为什么这个命令会抛出异常。问题是:有一个表格可以将我的表命名为条件,我可以执行这个命令"Query qb = em.createQuery("SELECT c FROM Condition c ")"吗?

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1 回答 1

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MySQL 必须引用保留字作为标识符。

将以下内容添加到 Condition 实体有帮助(查询可以保持原样):

@Table(name = "`condition`")
于 2012-05-03T19:36:08.383 回答