odbtools/odbctest/mql/aaa/19extensions/17beforerun.mql

-- ============================================================
-- beforerun 函数链：set / add / mod / case
-- ============================================================

-- 1. beforerun set 设置变量
/**
beforerun(set(myvar, 'hello_mql'))
**/
;

-- 使用变量插入
insert into /test/aaa/test_ext (e_name, e_value, e_text) values ('beforerun_set', 1, <myvar>)
;

select e_name, e_text from /test/aaa/test_ext where e_name='beforerun_set'
/**
output()
match("e_text","hello_mql")
**/
;

-- 2. beforerun add 累加
/**
beforerun(set(counter, 10), add(counter, 5))
**/
;

insert into /test/aaa/test_ext (e_name, e_value, e_text) values (concat('beforerun_add_', <counter>), {%d,counter}, 'add test')
;

select e_name, e_value from /test/aaa/test_ext where e_name=^'beforerun_add'
/**
output()
**/
;

-- 3. beforerun add 带单位（时间累加）
/**
beforerun(set(ct, '2024-01-01 00:00:00'), add(ct, 30, second))
**/
;

insert into /test/aaa/test_ext (e_name, e_text) values ('beforerun_time', concat('ct=', {%t,ct}))
;

-- 4. beforerun mod 取模
/**
beforerun(set(mod_val, 17), mod(mod_val, 5))
**/
;

insert into /test/aaa/test_ext (e_name, e_value, e_text) values (concat('beforerun_mod_', <mod_val>), {%d,mod_val}, 'mod test 17%5')
;

select e_name, e_value from /test/aaa/test_ext where e_name=^'beforerun_mod'
/**
output()
**/
;

-- 5. beforerun case 条件判断
/**
beforerun(set(case_val, 'yes'), case(case_val,'yes'))
**/
;

insert into /test/aaa/test_ext (e_name, e_text) values ('beforerun_case_yes', 'case matched yes')
;

select e_name from /test/aaa/test_ext where e_name='beforerun_case_yes'
/**
output()
count(1)
**/
;

-- 6. beforerun case 不匹配
/**
beforerun(set(case_val, 'no'), case(case_val,'yes'))
**/
;

-- 当 case 不匹配时，该语句会被跳过
insert into /test/aaa/test_ext (e_name, e_text) values ('beforerun_case_no', 'case not matched - should not execute')
;

-- 验证 case 不匹配时语句被跳过
select e_name from /test/aaa/test_ext where e_name='beforerun_case_no'
/**
output()
count(0)
**/
;