我使用循环在mysql中创建了以下表和存储过程。它似乎部分有效。
DROP table if EXISTS x;
DROP table if exists y;
DROP TABLE if EXISTS z;
CREATE TABLE x (`code` VARCHAR(10) not null primary key,
description text, fulltext key(description));
INSERT INTO x
VALUES(2111,'rice, husked'),
('0113','rice, paddy'),
('0124','fish, fresh'),
(2225,'beef meat'),
('0114','bananas'),
('0115','mango');
CREATE TABLE y (section text not null, `code` text);
INSERT INTO y
values('food', 'rice local'),
('food', 'rice imported'),
('food', 'beer'),
('food', 'banana');
create table z (section text not null, `code` text, cpc VARCHAR(10)
NULL);
drop procedure if exists fmatch;
delimiter //
create procedure fmatch()
language sql
deterministic
sql security definer
begin
declare v_code VARCHAR(10);
declare v_description text;
declare v_finished int;
declare c cursor for select * from x ;
declare continue handler for not found set v_finished=1;
delete from z;
open c;
c_loop: loop
fetch c into v_code,v_description;
if v_finished then
leave c_loop;
end if;
insert into z
select y.section, y.`code`, v_code
from y where match (y.`code`) against (v_description in boolean mode);
end loop c_loop;
close c;
select * from z;
end//
delimiter ;
call fmatch();
此处产生的结果为:
section code cpc
food rice local 2111
food rice imported 2111
food rice local 0113
food rice imported 0113
相反,我希望结果表为:
section code cpc
food banana 0114
food beer null
food rice local 0113
food rice imported 0113
我在错误的地方寻求你的建议。
答案 0 :(得分:0)
我使用不同的数据库进行了上述映射练习。以下是两个数据库 - 一个来自调查数据,另一个来自联合国分类系统。我试图将调查数据(关于各种支出项目)与联合国分类系统中的数据进行匹配。
然而,由于原始数据是具有不同命名的原始意义,因此结果(匹配)并不那么好。即使是下面的过程也不会产生部分单词匹配,例如芒果(来自原始数据)未映射到芒果。
在布尔模式中,您可以包含match(column1,column2 ..)(布尔模式下的'mango *'),它将产生部分字匹配。以类似的方式,我想在下面的代码中的列v_code上加上星号,但这不起作用。如果有人有其他想法,最受欢迎。
ALTER TABLE dbo_CPC
ADD FULLTEXT(`CODE`, description);
ALTER TABLE SLE11_MCPC
ADD FULLTEXT(`CODE`, Section, MCPC);
drop procedure if exists SLE11_CPC_Mapping;
delimiter //
create procedure SLE11_CPC_Mapping()
language sql
DETERMINISTIC
sql security definer
begin
declare v_section VARCHAR(10);
declare v_code text;
declare v_mcpc VARCHAR(10);
declare v_finished int;
declare c cursor for select * from SLE11_MCPC;
declare continue handler for not found set v_finished=1;
DELETE from SLE11_MCPC;
open c;
c_loop: loop
fetch c into v_section, v_code, v_mcpc;
if v_finished then
leave c_loop;
end if;
insert into SLE11_MCPC
select v_section, v_code, left(dbo_CPC.`code`,4)
from dbo_CPC where match (dbo_CPC.Description) against (v_code in
boolean MODE)
LIMIT 1;
end loop c_loop;
close c;
end//
delimiter ;