分库分表情况下添加索引

遇到的问题：分库分表情况下可能好几百张表，可以使用存储过程来新建索引。实现方式如下

/*新建存储过程：给库.表的字段添加索引*/
delimiter $$
     /*创建带参存储过程 dbName库名称；tablePrefixName表名称前缀；minTableNumber表最小序号；maxTableNumber表最大序号;indexName索引名称；indexValue索引列*/
     create PROCEDURE add_index_while_procure(IN dbPrefixName VARCHAR(50),IN tablePrefixName VARCHAR(50),IN minTableNumber INT,IN maxTableNumber INT,IN indexName varchar(50),IN indexValue varchar(200))
     BEGIN
        declare table_name_number int;
               
            set table_name_number=minTableNumber;
            while(table_name_number<=maxTableNumber) DO                                    
                 /*添加索引语句*/           
                 set @STMT :=CONCAT("alter table ",dbPrefixName,".",tablePrefixName,table_name_number," ADD index " ,indexName,"  ",indexValue,";");
                 /*输出执行语句*/   
                 select @STMT;
                 prepare STMT FROM @STMT;
                 EXECUTE STMT;   
                       
                 set table_name_number=table_name_number+1;
              end while;
     END 
$$
delimiter;

/*调用存储过程 所有子表及主表
ALTER TABLE manager.tableName ADD INDEX idx_station_time (STATION_CODE, TIME) USING BTREE ;
*/
call add_index_while_procure("manager","tableName_",1906,1912,"idx_code_time","(CODE, TIME)");

/*查看存储过程*/
show procedure status;
show create procedure  add_index_while_procure;

/*存在则删除存储过程*/
drop procedure if EXISTS  add_index_while_procure;

 

/*新建存储过程：删除给库.表的字段索引*/
delimiter $$
     /*创建带参存储过程 dbName库名称；tablePrefixName表名称前缀；minTableNumber表最小序号；maxTableNumber表最大序号;indexName索引名称；indexValue索引列*/
     create PROCEDURE drop_index_while_procure(IN dbPrefixName VARCHAR(50),IN tablePrefixName VARCHAR(50),IN minTableNumber INT,IN maxTableNumber INT,IN indexName varchar(50))
     BEGIN
        declare table_name_number int;
               
            set table_name_number=minTableNumber;
            while(table_name_number<=maxTableNumber) DO                                    
                 /*添加索引语句*/           
                 set @STMT :=CONCAT("alter table ",dbPrefixName,".",tablePrefixName,table_name_number," DROP index " ,indexName,";");
                 /*输出执行语句*/   
                 select @STMT;
                 prepare STMT FROM @STMT;
                 EXECUTE STMT;   
                       
                 set table_name_number=table_name_number+1;
              end while;
     END 
$$
delimiter;

/*调用存储过程 所有子表及主表
ALTER TABLE manager.tableName DROP INDEX idx_station_time;
*/
call drop_index_while_procure("manager","tableName_",1906,1912,"idx_station_time");

 

 

参考：

https://blog.csdn.net/qq_23132561/article/details/100888454