Aurora 存储过程保留值

问题描述

我已经构建了一个存储过程来获取我们数据库中每个 INT 列中的最大值并将其存储到一个表中，并根据该 int 类型的最大允许值计算它的使用百分比。

第一步清理表格并将自动 inc 值设置回比上次使用的值多一个，而不是让 innodb 猜测一些随机的下一个插入起始值。然后，我使用信息模式插入具有该 int 类型允许的模式、表、列、int 类型和 maxValue 的任何列。

很简单，问题出在游标上，在这个数据库的情况下，最后插入的模式记录是针对 wordpress 模式的。当它到达游标循环时它会失败，因为出于某种原因它在循环的第一次迭代中使用“wordpress”作为值。

DROP PROCEDURE if exists log_int_over_run;
DELIMITER ;;
CREATE PROCEDURE `log_int_over_run`()
MODIFIES sql DATA
not deterministic
BEGIN
        DECLARE x_id INT;
        DECLARE x_currentMaxValue BIGINT(20);
        DECLARE x_schemaName VARCHAR(50) DEFAULT 0;
        DECLARE x_tableName VARCHAR(50) DEFAULT 0;
        DECLARE x_columnName VARCHAR(50) DEFAULT 0;
        DECLARE setCurrentValue VARCHAR(400);
        DECLARE setLargerValue VARCHAR(400);
        DECLARE last_row INT;
        DECLARE current_max INT;
        DECLARE columns CURSOR FOR select id,schemaName,tableName,columnName,currentMaxValue from datateam.intOverRunLog where tableName !='intOverRunLog' and `ignore` != 1 order by id;
        DECLARE CONTINUE HANDLER FOR NOT FOUND SET last_row = 1;
        SET last_row=0;
                -- Remove any weird auto_inc gaps at the end of that last insert
    SET @m = (SELECT IFNULL(MAX(id),0) + 1 FROM datateam.intOverRunLog); 
    SET @s = CONCAT('ALTER TABLE datateam.intOverRunLog AUTO_INCREMENT=',@m);
    PREPARE stmt1 FROM @s;
    EXECUTE stmt1;
    DEALLOCATE PREPARE stmt1;

     -- Load up any new tables
    insert ignore INTO datateam.intOverRunLog (schemaName,dataType,`maxValue`)
    select C.TABLE_SCHEMA,C.TABLE_NAME,C.COLUMN_NAME,C.COLUMN_TYPE,@max_value := CASE
        WHEN COLUMN_TYPE like  'int(%) unsigned' THEN 4294967295
        WHEN COLUMN_TYPE like 'int(%)' THEN 2147483647
        WHEN COLUMN_TYPE like 'bigint(%) unsigned' THEN 18446744073709551615
        WHEN COLUMN_TYPE like 'bigint(%)' THEN 9223372036854775807
        WHEN COLUMN_TYPE like 'mediumint(%) unsigned' THEN 16777215
        WHEN COLUMN_TYPE like 'mediumint(%)' THEN 8388607
        WHEN COLUMN_TYPE like 'smallint(%) unsigned' THEN 65535
        WHEN COLUMN_TYPE like 'smallint(%)' THEN 32767
        WHEN COLUMN_TYPE like 'tinyint(%) unsigned' THEN 255
        WHEN COLUMN_TYPE like 'tinyint(%)' THEN 127
        ELSE "UNKNowN"
    END as max_value
    FROM information_schema.columns C
        JOIN  information_schema.tables T on C.TABLE_SCHEMA = T.TABLE_SCHEMA and C.TABLE_NAME = T.TABLE_NAME
    where C.TABLE_SCHEMA NOT IN ('information_schema','performance_schema','MysqL','sys') 
    and C.TABLE_NAME NOT IN ('intOverRunLog')
    AND COLUMN_TYPE like 'int%';
        
        -- Todo Deactivate any tables/columns that may have changed
        
        
        -- Get a list of schema/table/columns and iterate through it 
        
        OPEN columns;
        column_cursor : LOOP
            -- SET @value = NULL;
            
            FETCH columns INTO x_id,x_schemaName,x_tableName,x_columnName,x_currentMaxValue;
            IF last_row=1 THEN
                LEAVE column_cursor;
            END IF;
            select x_schemaName;
            -- SET setCurrentValue = CONCAT('select max(`','`) INTO @value from `','`.`','`;');
            -- select x_schemaName as SchemaName;
            SET setCurrentValue = CONCAT('update intOverRunLog set currentMaxValue = (select max(`','`) from `','`) where `schemaName` = \'','\' and tableName = \'','\' and columnName = \'','\';');
            SET @sql=setCurrentValue;
            select @sql;
            PREPARE s1 FROM @sql;
            EXECUTE s1;
            DEALLOCATE PREPARE s1;
            IF @value IS NOT NULL THEN
                select x_id,current_max as tableValue,x_currentMaxValue as currentMaxValue,current_max as `second`;
            END IF;
        END LOOP column_cursor;
        
        CLOSE columns;
    
END;;
DELIMITER ;

当我运行它时，我得到：

ERROR 1146 (42S02): Table 'wordpress.apiLog' doesn't exist

@sql 变量的输出是：

update intOverRunLog set currentMaxValue = (select max(`id`) from `wordpress`.`apiLog`) where `schemaName` = 'wordpress' and tableName = 'apiLog' and columnName = 'incoming_link_count';

intOverRunLog 表中的第一个架构是“存档”。那么...为什么要将 x_schemaName 变量设置为 wordpress？如果我去掉它，它似乎与 insert ignore 部分有关，它工作得很好。

这里也是我要插入的表的定义：

CREATE TABLE `intOverRunLog` (
  `id` int(11) NOT NULL AUTO_INCREMENT,`schemaName` varchar(50) NOT NULL,`tableName` varchar(50) NOT NULL,`columnName` varchar(50) NOT NULL,`dataType` varchar(50) NOT NULL,`maxValue` bigint(20) NOT NULL,`currentMaxValue` bigint(20) NOT NULL,`pct` float(10,2) GENERATED ALWAYS AS (((`currentMaxValue` / `maxValue`) * 100)) VIRTUAL,`ignore` tinyint(1) NOT NULL DEFAULT '0',`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,`modifed` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,`deleted` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',PRIMARY KEY (`id`),UNIQUE KEY `unique_key` (`schemaName`,`tableName`,`columnName`,`dataType`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

解决方法

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