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Accepted
Ario
Asked: 2015-09-05 23:23:01 +0800 CST

为什么“选择”在 MariaDB 中有效但在 MySQL 中无效

  • 772
set @row_number = 0;
SELECT 
    *
FROM
    (SELECT 
        (@row_number:=@row_number + 1) AS num,
        id,
        tbl_user_id,
        title,
        description,
        length lengths,
        create_date,
        file_size,
        thumbnails,
        videos.itsOK,
        viewed
    FROM
        tbl_videos videos
    WHERE
        videos.tbl_user_id = 23
            AND videos.tbl_category_id = 265
        ORDER BY videos.create_date DESC
) AS paginateTbl
WHERE
    paginateTbl.num > 0
        && paginateTbl.num <= 9

mysql结果： mysql结果

mariadb 结果： 在此处输入图像描述

内部查询对它们都有效，但主要查询仅在 mariadb 中有效！mysql不工作是怎么回事？

使用的版本是 mysql:5.5.44-0ubuntu0.14.04.1和 mariadb 10.0.13-MariaDB-log。

语句是相同的CREATE TABLE（除了AUTO_INCREMENT, 行数）：

MySQL结果：

SHOW CREATE TABLE tbl_videos;

CREATE TABLE `tbl_videos` (
    `id` INT (20) NOT NULL AUTO_INCREMENT
    ,`title` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`description` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`tags` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`video_quality` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link1` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link2` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link3` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`viewed` INT (11) NOT NULL
    ,`viewed_duration` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`viewed_traffic` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`embed_code` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`sharing_code` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`replace_times` INT (11) NOT NULL
    ,`actual_link` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`tbl_user_id` INT (11) NOT NULL
    ,`tbl_category_id` INT (11) NOT NULL
    ,`tbl_player_id` INT (11) NOT NULL
    ,`itsOK` TINYINT (2) NOT NULL
    ,`length` INT (20) NOT NULL
    ,`create_date` INT (11) NOT NULL
    ,`modified_date` INT (11) NOT NULL
    ,`thumbnails` TEXT COLLATE utf8_persian_ci
    ,`serverId` VARCHAR(32) COLLATE utf8_persian_ci NOT NULL
    ,`sizes` VARCHAR(100) COLLATE utf8_persian_ci DEFAULT NULL
    ,`our_server_link` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`like` INT (11) NOT NULL DEFAULT '0'
    ,`file_size` FLOAT DEFAULT NULL
    ,`islogo` TEXT COLLATE utf8_persian_ci
    ,`uuid` VARCHAR(64) COLLATE utf8_persian_ci DEFAULT NULL
    ,`output_type` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`video_file` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`video_setting` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`soft_hard` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`soft_hard_logo` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`vastTag` TEXT COLLATE utf8_persian_ci
    ,`extra_cat_id` INT (11) NOT NULL DEFAULT '0'
    ,`all_terafic` BIGINT (20) NOT NULL DEFAULT '0'
    ,PRIMARY KEY (`id`)
    ,KEY `tbl_user_id`(`tbl_user_id`)
    ,KEY `tbl_category_id`(`tbl_category_id`)
    ,CONSTRAINT `tbl_videos_ibfk_1` FOREIGN KEY (`tbl_user_id`) REFERENCES `tbl_users`(`id`) ON DELETE CASCADE ON UPDATE CASCADE
    ,CONSTRAINT `tbl_videos_ibfk_2` FOREIGN KEY (`tbl_category_id`) REFERENCES `tbl_categories`(`id`) ON DELETE CASCADE ON UPDATE CASCADE
    ) ENGINE = InnoDB AUTO_INCREMENT = 4622 DEFAULT CHARSET = utf8 COLLATE = utf8_persian_ci

MariaDB 结果：

SHOW CREATE TABLE tbl_videos;

CREATE TABLE `tbl_videos` (
    `id` INT (20) NOT NULL AUTO_INCREMENT
    ,`title` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`description` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`tags` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`video_quality` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link1` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link2` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`dl_link3` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`viewed` INT (11) NOT NULL
    ,`viewed_duration` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`viewed_traffic` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`embed_code` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`sharing_code` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`replace_times` INT (11) NOT NULL
    ,`actual_link` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`tbl_user_id` INT (11) NOT NULL
    ,`tbl_category_id` INT (11) NOT NULL
    ,`tbl_player_id` INT (11) NOT NULL
    ,`itsOK` TINYINT (2) NOT NULL
    ,`length` INT (20) NOT NULL
    ,`create_date` INT (11) NOT NULL
    ,`modified_date` INT (11) NOT NULL
    ,`thumbnails` TEXT COLLATE utf8_persian_ci
    ,`serverId` VARCHAR(32) COLLATE utf8_persian_ci NOT NULL
    ,`sizes` VARCHAR(100) COLLATE utf8_persian_ci DEFAULT NULL
    ,`our_server_link` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`like` INT (11) NOT NULL DEFAULT '0'
    ,`file_size` FLOAT DEFAULT NULL
    ,`islogo` TEXT COLLATE utf8_persian_ci
    ,`uuid` VARCHAR(64) COLLATE utf8_persian_ci DEFAULT NULL
    ,`output_type` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`video_file` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`video_setting` TEXT COLLATE utf8_persian_ci NOT NULL
    ,`soft_hard` VARCHAR(255) COLLATE utf8_persian_ci DEFAULT NULL
    ,`soft_hard_logo` VARCHAR(255) COLLATE utf8_persian_ci NOT NULL
    ,`vastTag` TEXT COLLATE utf8_persian_ci
    ,`extra_cat_id` INT (11) NOT NULL DEFAULT '0'
    ,`all_terafic` BIGINT (20) NOT NULL DEFAULT '0'
    ,PRIMARY KEY (`id`)
    ,KEY `tbl_user_id`(`tbl_user_id`)
    ,KEY `tbl_category_id`(`tbl_category_id`)
    ,CONSTRAINT `tbl_videos_ibfk_1` FOREIGN KEY (`tbl_user_id`) REFERENCES `tbl_users`(`id`) ON DELETE CASCADE ON UPDATE CASCADE
    ,CONSTRAINT `tbl_videos_ibfk_2` FOREIGN KEY (`tbl_category_id`) REFERENCES `tbl_categories`(`id`) ON DELETE CASCADE ON UPDATE CASCADE
    ) ENGINE = InnoDB AUTO_INCREMENT = 9387 DEFAULT CHARSET = utf8 COLLATE = utf8_persian_ci

mysql结果：

EXPLAIN SELECT * from FROM ...
id  select_type table       type    possible_keys   key key_len ref rows    Extra
1   PRIMARY     <derived2>  ALL NULL    NULL    NULL    NULL    14  Using where
2   DERIVED     videos      index_merge tbl_user_id,tbl_category_id tbl_category_id,tbl_user_id 4,4 NULL    1   Using intersect(tbl_category_id,tbl_user_id); Using where; Using filesort

mariadb 结果：

EXPLAIN SELECT * from tbl_videos
id  select_type table   type    possible_keys   key key_len ref rows    Extra
1   PRIMARY <derived2>  ALL NULL    NULL    NULL    NULL    2   Using where
2   DERIVED videos  index_merge tbl_user_id,tbl_category_id tbl_category_id,tbl_user_id 4,4 NULL    1   Using intersect(tbl_category_id,tbl_user_id); Using where; Using filesort
mysql mariadb

1 个回答

  1. Best Answer

    这是向 MySQL 报告的 MySQL 5.5 错误。所以我安装了 mysql 5.6 并且主查询运行良好。结果中带有@@version 的相同查询。

    set @row_number = 0;
SELECT 
    *, @@version mysql_version
FROM
    (SELECT 
        (@row_number:=@row_number + 1) AS num,
        id,
        tbl_user_id,
        title,
        description,
        length lengths,
        create_date,
        file_size,
        thumbnails,
        videos.itsOK,
        viewed
    FROM
        tbl_videos videos
    WHERE
        videos.tbl_user_id = 9
            AND videos.tbl_category_id = 113
            AND length > 0
        ORDER BY videos.create_date ASC
) AS paginateTbl
WHERE
    paginateTbl.num > 0
        && paginateTbl.num <= 9

    mysql 5.5 & mysql 5.6 主要查询结果： mysql 5.5 错误 - 主查询 mysql 5.6 - 主要曲

    现在我检查一个特殊的 id 例如： 1103 in tbl_videos 并且两个选择都很好。

    SELECT 
    id,
    tbl_user_id,
    title,
    description,
    length lengths,
    create_date,
    file_size,
    thumbnails,
    itsOK,
    viewed,
    @@version mysql_version
FROM
    tbl_videos
WHERE
    id = 1103

    mysql 5.5 & mysql 5.6 结果： mysql 5.5 错误 - 微小的查询 mysql 5.6 - 小查询

    • 4

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