create definer = 'www'@'192`.`168`.`%`.`%'
procedure newsng.pro_test(in _params varchar(255))
begin
declare _string varchar(50);
declare _string1 varchar(50);
declare splitchar varchar(50);
declare p_name_index int;
declare p_id_index int;
declare p_class_id int;
declare stop int default 0;
declare p_name varchar(50);
declare p_clasid int;
declare p_tech_names varchar(50);
declare p_tech_name varchar(50);
declare p_tech_ids varchar(50);
declare p_tech_id int;
declare p_num int;##班級是否存在教師
declare i int default 0;
declare cur cursor for(
select clas_name, clas_id from classes where is_del = 0 );
declare exit handler for sqlexception, sqlwarning
begin
rollback; #回滾事務
end;
##declare continue handler for sqlstate '02000' set stop = null;
/*這把 游標 異常後 捕捉並設定 迴圈使用 變數 stop 為 null 跳出迴圈。*/
set splitchar = ',';
start transaction;
set @j = 0;
select count(1) into @j from classes;
select @j;
open cur;
##myloop: loop -- 開始迴圈體,myloop為自定義迴圈名,結束迴圈時用到
fetch cur into p_name, p_clasid;
while ( stop is not null) do
##查詢條件下的資料是否存在，避免游標迴圈中斷
select count(1) into p_num from teacher_class tc inner join edugate_base.teacher t on t.tech_id = tc.tech_id and t.is_del = 0 where tc.is_del = 0 and tc.clas_id = p_clasid;
if p_num = 0 then
select p_num;
else
select group_concat(t.tech_name) tech_name, group_concat(t.tech_id) tech_id, tc.clas_id into p_tech_names, p_tech_ids, p_class_id from teacher_class tc inner join edugate_base.teacher t on t.tech_id = tc.tech_id and t.is_del = 0 where tc.is_del = 0 and tc.clas_id = p_clasid group by tc.clas_id;
if p_tech_names = null then
select p_class_id;
else
set p_name_index = 1+(length(p_tech_names) - length(replace(p_tech_names, splitchar,'')));##教師名稱陣列長度
set @i = 0;
while @i < p_name_index
doset @i = @i + 1;
set p_tech_name = reverse(substring_index(reverse(substring_index(p_tech_names,splitchar,@i)),splitchar,1));## 如 11,12,13 先擷取第乙個逗號（,）之前的字串11 反序11 擷取第乙個逗號之前的11 再反序11，第二次擷取第二個逗號之前的字串11,12 反序21,11 擷取逗號之前的21, 再反序12
set p_tech_id = reverse(substring_index(reverse(substring_index(p_tech_ids,splitchar,@i)),splitchar,1));
insert into tmp_strs(name,tech_id,tech_name) values(p_name, p_tech_id, p_tech_name);
end while;
end if;
end if;
#if p_tech_ids = null then
# select p_class_id;
#else
# set p_id_index = 1+(length(p_tech_ids) - length(replace(p_tech_ids, splitchar,'')));##教師id陣列長度
#end if;
fetch cur into p_name, p_clasid;
end while;
commit;
##end loop myloop; -- 結束自定義迴圈體
close cur;
end
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