在mySql中 拆分字符串

# DROP TEMPORARY TABLE IF EXISTS test_tim; 删表用

create TEMPORARY table test_tim (

id int,

a1 varchar(128),

a2 decimal(16,2),

a21 decimal(16,2),

a3 varchar(1024),

a4 datetime,

a5 int,

a6 int

);

#DROP TEMPORARY TABLE IF EXISTS test; 删表用

create TEMPORARY table test (

id int,

a1 varchar(128),

a2 decimal(16,2),

a21 decimal(16,2),

a3 varchar(1024),

a4 datetime,

a5 int,

a6 int

);

#插入样本

insert into test values(136,'test',1234567.8,987654.2,'com.a.b,1,6,error,IOEofFilea,b','2012/10/22 12:00',0,4);

insert into test values(137,'test2',1234567.9,987654.3,'com.a.b,1,6,error,IOEofFileb,c','2012/10/22 13:00',1,5);

#校验

select * from test;

136	test	1234567.80	987654.20	com.a.b,1,6,error,IOEofFilea,b	2012-10-22 12:00:00	0	4
137	test2	1234567.90	987654.30	com.a.b,1,6,error,IOEofFileb,c	2012-10-22 13:00:00	1	5

#处理逻辑

delimiter $$;

create procedure lhy()

READS SQL DATA

begin

declare did int;

declare da1 varchar(128);

declare da2 decimal(16,2);

declare da21 decimal(16,2);

declare da3 varchar(1024);

declare da4 datetime;

declare da5 int;

declare da6 int;

DECLARE STOP INT DEFAULT 0;

declare _cs cursor for select id, a1, a2, a21, a3,a4,a5,a6 from test;

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET STOP=1;

open _cs;

fetch _cs into did, da1, da2, da21, da3,da4,da5,da6;

while STOP<>1 DO

begin

declare i int;

declare s int;

set i=1 ;

set s=1 ;

while(i>0) DO

set i=LOCATE(',',da3,s) ;

if(i>0) then

insert test_tim values(did, da1, da2, da21, substring(da3,s,i-s),da4,da5,da6 ) ;

end if;

if(i<=0) then

insert test_tim values(did, da1, da2, da21, substring(da3,s,length(da3)-s+1),da4,da5,da6) ;

end if;

set s = i + 1 ;

end while;

end;

fetch _cs into did, da1, da2, da21, da3,da4,da5,da6;

END while;

close _cs;

end$$;

#drop procedure lhy;删除procedure 用

#call lhy; 呼叫lhy用

#校验结果用--先create ,再call,再校验结果

#select * from test_tim;

136	test	1234567.80	987654.20	com.a.b	2012-10-22 12:00:00	0	4
136	test	1234567.80	987654.20	1	2012-10-22 12:00:00	0	4
136	test	1234567.80	987654.20	6	2012-10-22 12:00:00	0	4
136	test	1234567.80	987654.20	error	2012-10-22 12:00:00	0	4
136	test	1234567.80	987654.20	IOEofFilea	2012-10-22 12:00:00	0	4
136	test	1234567.80	987654.20	b	2012-10-22 12:00:00	0	4
137	test2	1234567.90	987654.30	com.a.b	2012-10-22 13:00:00	1	5
137	test2	1234567.90	987654.30	1	2012-10-22 13:00:00	1	5
137	test2	1234567.90	987654.30	6	2012-10-22 13:00:00	1	5
137	test2	1234567.90	987654.30	error	2012-10-22 13:00:00	1	5
137	test2	1234567.90	987654.30	IOEofFileb	2012-10-22 13:00:00	1	5
137	test2	1234567.90	987654.30	c	2012-10-22 13:00:00	1	5