如果变量为空（例如_religion），我想执行子插入查询
我在if语句中尝试了is not null，!= ''，!= ""，<> ''和<> ""，但没有用。
CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_import_employees`(
_emp_id BIGINT,
_lastname VARCHAR(100),
_firstname VARCHAR(100),
_middlename VARCHAR(100),
_suffix VARCHAR(50),
_email VARCHAR(150),
_birthdate DATETIME,
_civil_status VARCHAR(100),
_gender VARCHAR(25),
_religion VARCHAR(255),
_height VARCHAR(20),
_weight VARCHAR(20),
_taxcode VARCHAR(5),
_company VARCHAR(255),
_division VARCHAR(255),
_department VARCHAR(255),
_function VARCHAR(255),
_workbase VARCHAR(255),
_designation VARCHAR(255),
_jobgrade VARCHAR(100),
_datehired DATETIME,
_status VARCHAR(150),
_salary DOUBLE,
_sss VARCHAR(55),
_tin VARCHAR(55),
_philhealth VARCHAR(55),
_pagibig VARCHAR(55),
_createdby VARCHAR(55),
_address VARCHAR(55),
_city VARCHAR(55),
_region VARCHAR(55),
_phone1 VARCHAR(55),
_emperson VARCHAR(55),
_emaddress VARCHAR(55),
_emcontact VARCHAR(55)
)
BEGIN
DECLARE __religion INT DEFAULT 0;
DECLARE __division INT DEFAULT 0;
DECLARE __company INT DEFAULT 0;
DECLARE __department INT DEFAULT 0;
DECLARE __function INT DEFAULT 0;
DECLARE __workbase INT DEFAULT 0;
DECLARE __designation INT DEFAULT 0;
DECLARE __jobgrade INT DEFAULT 0;
DECLARE __status INT DEFAULT 0;
SELECT IFNULL(autoid, 0) INTO __religion FROM hris_religion WHERE LOWER(TRIM(religion)) = LOWER(TRIM(_religion)) LIMIT 1;
IF(__religion = 0 || __religion IS NULL && CHAR_LENGTH(_religion) > 0) THEN
INSERT INTO hris_religion(religion, createdby, date_created)
VALUES(_religion, _createdby, CURDATE());
SELECT IFNULL(autoid, 0) INTO __religion FROM hris_religion WHERE LOWER(TRIM(religion)) = LOWER(TRIM(_religion)) LIMIT 1;
END IF;
SELECT IFNULL(business_id, 0) INTO __division FROM hris_business_unit WHERE LOWER(TRIM(business_unit)) = LOWER(TRIM(_division)) LIMIT 1;
IF(__division = 0 || __division IS NULL && CHAR_LENGTH(_division) > 0) THEN
INSERT INTO hris_business_unit(business_unit, createdby, date_created)
VALUES(_division, _createdby, CURDATE());
SELECT IFNULL(business_id, 0) INTO __division FROM hris_business_unit WHERE LOWER(TRIM(business_unit)) = LOWER(TRIM(_division)) LIMIT 1;
END IF;
SELECT IFNULL(comp_id, 0) INTO __company FROM hris_company WHERE LOWER(TRIM(comp_name)) = LOWER(TRIM(_company)) LIMIT 1;
IF(__company = 0 || __company IS NULL && CHAR_LENGTH(_company) > 0) THEN
INSERT INTO hris_company(comp_name, createdby, date_created)
VALUES(_company, _createdby, CURDATE());
SELECT IFNULL(comp_id, 0) INTO __company FROM hris_company WHERE LOWER(TRIM(comp_name)) = LOWER(TRIM(_company)) LIMIT 1;
END IF;
SELECT IFNULL(dept_id, 0) INTO __department FROM hris_department WHERE LOWER(TRIM(department)) = LOWER(TRIM(_department )) LIMIT 1;
IF(__department = 0 || __department IS NULL && CHAR_LENGTH(_department) > 0) THEN
INSERT INTO hris_department(department, createdby, date_created)
VALUES(_department, _createdby, CURDATE());
SELECT IFNULL(dept_id, 0) INTO __department FROM hris_department WHERE LOWER(TRIM(department)) = LOWER(TRIM(_department )) LIMIT 1;
END IF;
SELECT IFNULL(func_id, 0) INTO __function FROM hris_function WHERE LOWER(TRIM(function_name)) = LOWER(TRIM(_function)) LIMIT 1;
IF(__function = 0 || __function IS NULL && CHAR_LENGTH(_function) > 0) THEN
INSERT INTO hris_function(function_name, createdby, date_created)
VALUES(_function, _createdby, CURDATE());
SELECT IFNULL(func_id, 0) INTO __function FROM hris_function WHERE LOWER(TRIM(function_name)) = LOWER(TRIM(_function)) LIMIT 1;
END IF;
SELECT IFNULL(work_base_id, 0) INTO __workbase FROM hris_work_base WHERE LOWER(TRIM(work_base)) = LOWER(TRIM(_workbase)) LIMIT 1;
IF(__workbase = 0 || __workbase IS NULL && CHAR_LENGTH(_workbase) > 0) THEN
INSERT INTO hris_work_base(work_base, createdby, date_created)
VALUES(_workbase, _createdby, CURDATE());
SELECT IFNULL(work_base_id, 0) INTO __workbase FROM hris_work_base WHERE LOWER(TRIM(work_base)) = LOWER(TRIM(_workbase)) LIMIT 1;
END IF;
SELECT IFNULL(autoid, 0) INTO __designation FROM hris_designation WHERE LOWER(TRIM(designation)) = LOWER(TRIM(_designation)) LIMIT 1;
IF(__designation = 0 || __designation IS NULL && CHAR_LENGTH(_designation) > 0) THEN
INSERT INTO hris_designation(designation, createdby, date_created)
VALUES(_designation, _createdby, CURDATE());
SELECT IFNULL(autoid, 0) INTO __designation FROM hris_designation WHERE LOWER(TRIM(designation)) = LOWER(TRIM(_designation)) LIMIT 1;
END IF;
SELECT IFNULL(autoid, 0) INTO __jobgrade FROM hris_job_grade WHERE LOWER(TRIM(job_id)) = LOWER(TRIM(_jobgrade)) LIMIT 1;
IF(__jobgrade = 0 || __jobgrade IS NULL && CHAR_LENGTH(_jobgrade) > 0) THEN
INSERT INTO hris_job_grade(job_id, createdby, date_created)
VALUES(_jobgrade, _createdby, CURDATE());
SELECT IFNULL(autoid, 0) INTO __jobgrade FROM hris_job_grade WHERE LOWER(TRIM(job_id)) = LOWER(TRIM(_jobgrade)) LIMIT 1;
END IF;
SELECT IFNULL(status_id, 0) INTO __status FROM hris_employee_status WHERE LOWER(TRIM(status_desc)) = LOWER(TRIM(_status)) LIMIT 1;
IF(__status = 0 || __status IS NULL && CHAR_LENGTH(_status) > 0) THEN
INSERT INTO hris_employee_status(status_desc, createdby, date_created)
VALUES(_status, _createdby, CURDATE());
SELECT IFNULL(status_id, 0) INTO __status FROM hris_employee_status WHERE LOWER(TRIM(status_desc)) = LOWER(TRIM(_status)) LIMIT 1;
END IF;
INSERT INTO hris_employee(emp_id, lastname, firstname, middlename, suffix, email, birthdate, civil_status, gender, religion_id,
height, weight, taxcode, company_id, business_id, dept_id, function_id, work_base_id, designation_id,
job_grade_id, hired_date, status_id, salary_basis, salary_rate, sss, tin, philhealth, pagibig,
paddress, pcity, pprovince, pphone1, emergency_contact_person, emergency_address, emergency_contactno)
VALUES(_emp_id, _lastname, _firstname, _middlename, _suffix, _email, _birthdate, _civil_status, _gender,
__religion, _height, _weight, _taxcode, __company, __division, __department, __function,
__workbase, __designation, _jobgrade, _datehired, __status, 'Monthly', _salary, _sss, _tin, _philhealth, _pagibig,
_address, _city, _region, _phone1, _emperson, _emaddress, _emcontact);
SELECT IF(ROW_COUNT() > 0, _emp_id, 0) AS result;
END$$
DELIMITER ;