Question

我想记录sql语句的执行时间。为此，我使用拦截器插件。但是它只“捕获”外部语句并打印执行整个语句所需的组合时间，包括@Result中包含的子查询。为什么它不会单独记录所有语句，是否有任何解决方案？

以下是重现我的场景的代码：

ADAO：

@Select({
        "select * from a",
        "where id = #{id,jdbcType=INTEGER}"
    })
@Results({
        @Result(column="id", property="id", jdbcType=JdbcType.INTEGER, id=true),
        @Result(column="id", property="bs", javaType=List.class, many=@Many(fetchType=FetchType.EAGER, select = "org.BDao.selectByAId")),
        @Result(column="id", property="cs", javaType=List.class, many=@Many(fetchType=FetchType.EAGER, select = "org.CDao.selectByAId"))
})
A selectByPrimaryKey(Integer id);

BDAO：

@Select({
    "select * from b",
    "where a_id = #{aId,jdbcType=INTEGER}"
})
@Results({
    ...
})
List<B> selectByAId(Integer aId);

CDao：

@Select({
    "select * from c",
    "where a_id = #{aId,jdbcType=INTEGER}"
})
@Results({
    ...
})
List<C> selectByAId(Integer aId);

拦截器：

@Intercepts({ @Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class }) })
public class LogTimeQueryExecutePlugin implements Interceptor {

    static int MAPPED_STATEMENT_INDEX = 0;
    static int PARAMETER_INDEX = 1;
    static int ROWBOUNDS_INDEX = 2;
    static int RESULT_HANDLER_INDEX = 3;

    static Logger logger = LoggerFactory.getLogger(LogTimeQueryExecutePlugin.class);

    public Object intercept(Invocation invocation) throws Throwable {
        long start = System.currentTimeMillis();
        Object proceed = invocation.proceed();
        MappedStatement ms = (MappedStatement) invocation.getArgs()[MAPPED_STATEMENT_INDEX];

        logger.info("Execution time "+ms.getId()+" : "+(System.currentTimeMillis() - start)+" ms");

        return proceed;
    }

    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    public void setProperties(Properties properties) {

    }
}

记录：

执行时间org.ADao.selectByPrimaryKey：59033 ms

如何拦截mybatis中的子查询

0 个答案: