mysqlストアドプロシージャのループバック日数

バグであるかどうかわかりません。この手順では、私の出力は、いくつかの時間後にNULLを取得：mysqlストアドプロシージャのループバック日数

CREATE DEFINER=`root`@`%` PROCEDURE `rebuild_cache_days`() 
    MODIFIES SQL DATA 
BEGIN 
    DECLARE SID INT; 
    DECLARE M INT; 
    DECLARE Y INT; 
    DECLARE D INT; 

    DECLARE sDone INT; 
    DECLARE tDone INT; 

    DECLARE curs CURSOR FOR SELECT `SensorID` FROM `temp_sensors`; 
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET sDone = 1; 

    OPEN curs; 
    SET sDone = 0; 

    loopSID: REPEAT 
     FETCH curs INTO SID; 
     SELECT DAY(`Timestamp`), MONTH(`Timestamp`), YEAR(`Timestamp`) FROM `temp_log` WHERE `SensorID` = SID ORDER BY `Timestamp` ASC LIMIT 1 INTO D, M, Y; 
     SET tDone = 0; 
     loopTime: REPEAT 
      SELECT CONCAT('process SensorID ', SID, ' date ', Y, '-', M, '-', D) AS Output; 
      DELETE FROM `temp_cache_days` WHERE `SensorID` = SID AND `Timestamp` = CONCAT(Y, '-', M,'-', D,' 00:00:00'); 
      INSERT INTO `temp_cache_days` (`SensorID`, `Timestamp`, `Avg`, `Min`, `Max`) 
      SELECT `SensorID`, CONCAT(Y, '-', M,'-', D,' 00:00:00') AS TS, 
        ROUND(AVG(`Temperatur`), 1) AS Avg, ROUND(MIN(`Temperatur`), 1) AS Min, ROUND(MAX(`Temperatur`), 1) AS Max 
      FROM `temp_log` WHERE `SensorID` = SID 
      AND `Timestamp` BETWEEN CONCAT(Y, '-', M,'-', D,' 00:00:00') AND CONCAT(Y, '-', M,'-', D,' 23:59:59') 
      GROUP BY TS LIMIT 1; 
      SELECT DAY(DATE_ADD(CONCAT(Y, '-', M,'-', D,' 00:00:00'), INTERVAL 1 DAY)), 
        MONTH(DATE_ADD(CONCAT(Y, '-', M,'-', D,' 00:00:00'), INTERVAL 1 DAY)), 
        YEAR(DATE_ADD(CONCAT(Y, '-', M,'-', D,' 00:00:00'), INTERVAL 1 DAY)) INTO D, M, Y; 
      IF CONCAT(Y,'-',M,'-01 00:00:00') >= CONCAT(CURDATE(), " ",CURTIME()) THEN 
       SET tDone = 1; 
      END IF; 
     UNTIL tDone END REPEAT loopTime; 
    UNTIL sDone END REPEAT loopSID; 
    SELECT CONCAT('process done') AS Output; 
    CLOSE curs; 
END

と出力のthats：

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-6-29 | 
+-----------------------------------+ 
1 row in set (0,30 sec) 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-7-30 | 
+-----------------------------------+ 
1 row in set (0,45 sec) 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-8-31 | 
+-----------------------------------+ 
1 row in set (0,78 sec) 

+----------------------------------+ 
| Output       | 
+----------------------------------+ 
| process SensorID 1 date 2013-8-1 | 
+----------------------------------+ 
1 row in set (0,93 sec) 

+----------------------------------+ 
| Output       | 
+----------------------------------+ 
| process SensorID 1 date 2013-8-2 | 
+----------------------------------+ 

[...cut...] 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-8-27 | 
+-----------------------------------+ 
1 row in set (5,36 sec) 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-8-28 | 
+-----------------------------------+ 
1 row in set (5,55 sec) 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-8-29 | 
+-----------------------------------+ 
1 row in set (5,71 sec) 

+-----------------------------------+ 
| Output       | 
+-----------------------------------+ 
| process SensorID 1 date 2013-8-30 | 
+-----------------------------------+ 
1 row in set (5,87 sec) 

+--------+ 
| Output | 
+--------+ 
| NULL | 
+--------+ 
1 row in set (6,03 sec) 

+--------+ 
| Output | 
+--------+ 
| NULL | 
+--------+ 
1 row in set (6,03 sec)

だから、少なくともそれだけでNULLたびに出力し、日付がジャンプする前に。コードをもう一度見直しましたが、エラーは見つかりませんでした。

DATE_ADDに問題があります。なぜなら、DELETEとINSERT INTO ... SELECTで行を削除しても、出力としてNULLしか得られないからです。

# dpkg -l | grep mysql 
ii libdbd-mysql-perl       4.028-2         i386   Perl5 database interface to the MySQL database 
ii libmysqlclient18:i386      5.6.28-0ubuntu0.15.04.1     i386   MySQL database client library 
ii mysql-client-5.6       5.6.28-0ubuntu0.15.04.1     i386   MySQL database client binaries 
ii mysql-client-core-5.6      5.6.28-0ubuntu0.15.04.1     i386   MySQL database core client binaries 
ii mysql-common        5.6.28-0ubuntu0.15.04.1     all   MySQL database common files, e.g. /etc/mysql/my.cnf 
ii mysql-server        5.6.28-0ubuntu0.15.04.1     all   MySQL database server (metapackage depending on the latest version) 
ii mysql-server-5.6       5.6.28-0ubuntu0.15.04.1     i386   MySQL database server binaries and system database setup 
ii mysql-server-core-5.6      5.6.28-0ubuntu0.15.04.1     i386   MySQL database server binaries 
rc php5-mysql         5.6.4+dfsg-4ubuntu6      i386   MySQL module for php5 
ii php5-mysqlnd        5.6.4+dfsg-4ubuntu6.4      i386   MySQL module for php5 (Native Driver)

編集：私は日、月、年を保つことと間違っているものを知ってはいけない、

mysql> Set @D = 27, @M = 6, @Y = 2013; 
Query OK, 0 rows affected (0,00 sec) 

mysql> SELECT DAY(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS D, 
    -> MONTH(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS M, 
    -> YEAR(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS Y INTO @D, @M, @Y; 
Query OK, 1 row affected (0,00 sec) 

mysql> SELECT @D, @M, @Y; 
+------+------+------+ 
| @D | @M | @Y | 
+------+------+------+ 
| 28 | 6 | 2013 | 
+------+------+------+ 
1 row in set (0,00 sec) 

mysql> SELECT DAY(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS D, MONTH(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS M, YEAR(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS Y INTO @D, @M, @Y; 
Query OK, 1 row affected (0,00 sec) 

mysql> SELECT @D, @M, @Y;                                           +------+------+------+ 
| @D | @M | @Y | 
+------+------+------+ 
| 29 | 6 | 2013 | 
+------+------+------+ 
1 row in set (0,00 sec) 

mysql> SELECT DAY(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS D, MONTH(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS M, YEAR(DATE_ADD(CONCAT(@Y, '-', @M, '-', @D,' 00:00:00'), INTERVAL 1 DAY)) AS Y INTO @D, @M, @Y; 
Query OK, 1 row affected (0,00 sec) 

mysql> SELECT @D, @M, @Y;                                           +------+------+------+ 
| @D | @M | @Y | 
+------+------+------+ 
| 30 | 7 | 2013 | 
+------+------+------+ 
1 row in set (0,00 sec)

出典

2016-04-25 Thomas

オーケー：私も同じ問題になり、手動の方法を、tryd

別のヴァールが、私の解決策は（そして、それはよりエレガントな方法です）、完全な昼間を保持する1つのvarだけを使用することです。

BEGIN 
    DECLARE SID INT; 
    DECLARE Dt DATETIME ; 

    DECLARE sDone INT; 
    DECLARE tDone INT; 

    DECLARE curs CURSOR FOR SELECT `SensorID` FROM `temp_sensors`; 
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET sDone = 1; 

    OPEN curs; 
    SET sDone = 0; 

    loopSID: REPEAT 
     FETCH curs INTO SID; 
     SELECT DATE_FORMAT(`Timestamp`, '%Y-%m-%d 00:00:00') FROM `temp_log` WHERE `SensorID` = SID ORDER BY `Timestamp` ASC LIMIT 1 INTO Dt; 
     SET tDone = 0; 
     loopTime: REPEAT 
      SELECT CONCAT('process SensorID ', SID, ' date ', Dt) AS Output; 
      DELETE FROM `temp_cache_days` WHERE `SensorID` = SID AND `Timestamp` = Dt; 
      INSERT INTO `temp_cache_days` (`SensorID`, `Timestamp`, `Avg`, `Min`, `Max`) 
      SELECT `SensorID`, Dt AS TS, 
        ROUND(AVG(`Temperatur`), 1) AS Avg, ROUND(MIN(`Temperatur`), 1) AS Min, ROUND(MAX(`Temperatur`), 1) AS Max 
      FROM `temp_log` WHERE `SensorID` = SID 
      AND `Timestamp` BETWEEN Dt AND DATE_FORMAT(Dt, '%Y-%m-%d 23:59:59') 
      GROUP BY TS LIMIT 1; 
      SELECT DATE_FORMAT(Dt + INTERVAL 1 DAY, '%Y-%m-%d 00:00:00') INTO Dt; 
      IF Dt >= CONCAT(CURDATE(), " ",CURTIME()) THEN 
       SET tDone = 1; 
      END IF; 
     UNTIL tDone END REPEAT loopTime; 
    UNTIL sDone END REPEAT loopSID; 
    SELECT CONCAT('process done') AS Output; 
    CLOSE curs; 
END

出典

2016-04-25 18:35:35 Thomas

mysqlストアドプロシージャのループバック日数

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