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MySQL分表优化 试验PROCEDURE

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MySQL分表优化之试验PROCEDURE

  DELIMITER $$

  DROP PROCEDURE `t_girl`.`sp_split_table`$$

  CREATE PROCEDURE `t_girl`.`sp_split_table`()

  BEGIN

  declare done int default 0;

  declare v_user_name varchar(20) default '';

  declare v_table_name varchar(64) default '';

  -- Get all users' name.

  declare cur1 cursor for select user_name from t_group group by user_name;

  -- Deal with error or warnings.

  declare continue handler for 1329 set done = 1;

  -- Open cursor.

  open cur1;

  while done <> 1

  do

  fetch cur1 into v_user_name;

  if not done then

  -- Get table name.

  set v_table_name = concat('t_group_',v_user_name);

  -- Create new extra table.

  set @stmt = concat('create table ',v_table_name,' like t_group');

  prepare s1 from @stmt;

  execute s1;

  drop prepare s1;

  -- Load data into it.

  set @stmt = concat('insert into ',v_table_name,' select * from t_group where user_name = ''',v_user_name,'''');

  prepare s1 from @stmt;

  execute s1;

  drop prepare s1;

  end if;

  end while;

  -- Close cursor.

  close cur1;

  -- Free variable from memory.

  set @stmt = NULL;

  END$$

  DELIMITER ;

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