通用分表儲存過程

使用建立分表儲存過程

set @field_list ='

`syslog_id` int(11) not null auto_increment,
`create_user` varchar(32) default null,
primary key (`syslog_id`)
'; 
call branch_table('test', @field_list, 4, 2);

drop procedure if exists `branch_table`;

create procedure `branch_table`(
in p_table_name varchar(200), 
in p_field_list varchar(2048), 
in p_branch_size int, 
in p_lpad int
)begin
/*定義變數*/
declare m_begin_row int default 0;
while m_begin_row前期沒有分表資料量太大後期拆表用的mysql儲存過程
簡單的辦法是直接寫
--假設根據user_id分表，分成64張
insert into table_new_0000 select * from table_old where mod(user_id,64)=0; 
insert into table_new_0001 select * from table_old where mod(user_id,64)=1;

建立分表

delimeter //

--- 全量指令碼：
create procedure sp_xf_move_item() 
begin 
declare v_exit int default 0; 
declare v_spid bigint; 
declare v_id bigint; 
declare i int default 0; 
declare c_table int;
--定義游標（要分拆的表，定義乙個數量的截止時間）
declare c_ids cursor for select id,user_id from item_records_0000 where gmt_modified < '2010-8-25 00:00:00'; 
declare continue handler for not found set v_exit=1; 
open c_ids; 
repeat 
--將需要的值裝入變數
fetch c_ids into v_id,v_spid; 
if v_exit = 0 then 
set @vv_id = v_id; 
--根據取模字段獲取資料存在的表
select mod(v_spid,64) into c_table; 
--組裝動態sql
set @sql_context = 
concat('insert into item_record_', 
lpad(c_table, 4, 0), 
' select * from item_records_0000 where id = ?'); 
prepare stmt from @sql_context; 
--執行sql 
execute stmt using @vv_id; 
deallocate prepare stmt; 
end if; 
set ii=i+1; 
--100條提交一次，以提高效率，記得執行儲存過程前設定auto_commit
if mod(i,100)=0 then commit; 
end if; 
until v_exit=1 
end repeat; 
close c_ids; 
commit; 
end; 
//

call sp_xf_move_item(); 

新增資料

#### 增量指令碼 ######  

create procedure sp_xf_add_item() 
begin 
declare v_exit int default 0; 
declare v_spid bigint; 
declare v_id bigint; 
declare i int default 0; 
declare c_table int; 
declare c_ids cursor for select id,supplier_id from item_records_0000 where gmt_modified >= '2010-8-25 00:00:00'; 
declare continue handler for not found set v_exit=1; 
open c_ids; 
repeat 
fetch c_ids into v_id,v_spid; 
if v_exit = 0 then 
set @vv_id = v_id; 
set @v_row=0; 
select mod(v_spid,64) into c_table; 
--判斷資料是否已經存在
set @sql_c = 
concat('select count(*) into @v_row from item_record_', 
lpad(c_table, 4, 0), 
' where id = ?'); 
prepare stmt_c from @sql_c; 
execute stmt_c using @vv_id; 
deallocate prepare stmt_c; 
set @sql_insert = 
concat('insert into bbc_item_record_', 
lpad(c_table, 4, 0), 
' select * from item_records_0000 where id = ?'); 
prepare stmt_i from @sql_insert; 
set @sql_delete = 
concat('delete from bbc_item_record_', 
lpad(c_table, 4, 0), 
' where id = ?'); 
prepare stmt_d from @sql_delete; 
--如果資料已經存在，則先delete在insert 
if @v_row>0 then 
execute stmt_d using @vv_id; 
deallocate prepare stmt_d; 
end if; 
execute stmt_i using @vv_id; 
deallocate prepare stmt_i; 
end if; 
set ii=i+1; 
if mod(i,100)=0 then commit; 
end if; 
until v_exit=1 
end repeat; 
close c_ids; 
commit; 
end; 
//

通用儲存過程

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