尽管我生成的查询工作正常,但为什么JDBC-MySQL会在您的SQL语法中引发错误?

时间:2018-11-12 08:59:44

标签: java mysql sql database jdbc

我一直在从事的项目中有许多类似的代码块。

    DBConnector db = new DBConnector();
    Connection conn = db.connect();
    String insertQuery = "INSERT INTO track_item_result (tirTrackItemId, tirNodeId, tirDetailId, tirResultString, tirResultValue, tirStatus) " + "VALUES (?,?,?,?,?,?)";
    PreparedStatement pstmt = conn.prepareStatement(insertQuery, Statement.RETURN_GENERATED_KEYS);
    pstmt.setInt(1, this.trackItem.getId());
    pstmt.setInt(2, this.node.getId());
    pstmt.setInt(3, this.tirDetailId);
    pstmt.setString(4, this.tirResultString);
    pstmt.setString(5, this.tirResultValue);
    pstmt.setString(6, this.tirStatus);
    System.out.println(pstmt.toString());
    pstmt.executeUpdate(insertQuery);

    ResultSet generatedKeys = pstmt.getGeneratedKeys();

我在上面的代码的最后3行打印了查询,这是格式正确的SQL语句。

com.mysql.cj.jdbc.ClientPreparedStatement: INSERT INTO track_item_result (tirTrackItemId, tirNodeId, tirDetailId, tirResultString, tirResultValue, tirStatus) VALUES (3,15,0,'<EOL><EOL><EOL><EOL>','-1','F')

如果我直接在MySQL客户端上复制粘贴此生成的查询,它似乎可以正常工作。但是在项目中,它会引发可怕的 SQL语法错误

java.sql.SQLSyntaxErrorException: 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 '?,?,?,?,?,?)' at line 1
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:118)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
    at com.mysql.cj.jdbc.StatementImpl.executeUpdateInternal(StatementImpl.java:1393)
    at com.mysql.cj.jdbc.StatementImpl.executeLargeUpdate(StatementImpl.java:2353)
    at com.mysql.cj.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1303)
    at com.example.myproject.models.TrackItemResult.insertInDb(TrackItemResult.java:98)
    at com.example.myproject.healthcheck.TrackItemRunnable.run(TrackItemRunnable.java:86)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)

在此行TrackItemResult.insertInDb(TrackItemResult.java:98)是pstmt.executeUpdate()行。

我无法理解该行为。该查询看起来很理智,并且可以正常工作。值已根据架构正确格式化。还有什么可能导致这种情况?

2 个答案:

答案 0 :(得分:1)

尝试用pstmt.executeUpdate();代替pstmt.executeUpdate(insertQuery);

答案 1 :(得分:1)

pstmt.executeUpdate();不需要参数

或者您应该为您的SQL检查参数类型