Mega Code Archive
Check input parameter
<![CDATA[
mysql>
mysql> CREATE TABLE Employee(
-> id int,
-> first_name VARCHAR(15),
-> last_name VARCHAR(15),
-> start_date DATE,
-> end_date DATE,
-> salary FLOAT(8,2),
-> city VARCHAR(10),
-> description VARCHAR(15)
-> );
Query OK, 0 rows affected (0.02 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values (1,'Jason', 'Martin', '19960725', '20060725', 1234.56, 'Toronto', 'Programmer');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(2,'Alison', 'Mathews', '19760321', '19860221', 6661.78, 'Vancouver','Tester');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(3,'James', 'Smith', '19781212', '19900315', 6544.78, 'Vancouver','Tester');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(4,'Celia', 'Rice', '19821024', '19990421', 2344.78, 'Vancouver','Manager');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(5,'Robert', 'Black', '19840115', '19980808', 2334.78, 'Vancouver','Tester');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(6,'Linda', 'Green', '19870730', '19960104', 4322.78,'New York', 'Tester');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(7,'David', 'Larry', '19901231', '19980212', 7897.78,'New York', 'Manager');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(8,'James', 'Cat', '19960917', '20020415', 1232.78,'Vancouver', 'Tester');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> select * from Employee;
+------+------------+-----------+------------+------------+---------+-----------+-------------+
| id | first_name | last_name | start_date | end_date | salary | city | description |
+------+------------+-----------+------------+------------+---------+-----------+-------------+
| 1 | Jason | Martin | 1996-07-25 | 2006-07-25 | 1234.56 | Toronto | Programmer |
| 2 | Alison | Mathews | 1976-03-21 | 1986-02-21 | 6661.78 | Vancouver | Tester |
| 3 | James | Smith | 1978-12-12 | 1990-03-15 | 6544.78 | Vancouver | Tester |
| 4 | Celia | Rice | 1982-10-24 | 1999-04-21 | 2344.78 | Vancouver | Manager |
| 5 | Robert | Black | 1984-01-15 | 1998-08-08 | 2334.78 | Vancouver | Tester |
| 6 | Linda | Green | 1987-07-30 | 1996-01-04 | 4322.78 | New York | Tester |
| 7 | David | Larry | 1990-12-31 | 1998-02-12 | 7897.78 | New York | Manager |
| 8 | James | Cat | 1996-09-17 | 2002-04-15 | 1232.78 | Vancouver | Tester |
+------+------------+-----------+------------+------------+---------+-----------+-------------+
8 rows in set (0.02 sec)
mysql>
mysql> delimiter $$
mysql>
mysql> CREATE PROCEDURE sp_customer_search_dyn
-> (in_Description VARCHAR(30),
-> in_contact_surname VARCHAR(30),
-> in_contact_firstname VARCHAR(30),
-> in_city VARCHAR(10))
->
-> BEGIN
-> DECLARE l_where_clause VARCHAR(1000) DEFAULT 'WHERE';
->
-> IF in_Description IS NOT NULL THEN
-> SET l_where_clause=CONCAT(l_where_clause,
-> ' description="',in_Description,'"');
-> END IF;
-> select l_where_clause;
-> IF in_contact_surname IS NOT NULL THEN
-> IF l_where_clause<>'WHERE' THEN
-> SET l_where_clause=CONCAT(l_where_clause,' AND ');
-> END IF;
-> SET l_where_clause=CONCAT(l_where_clause,
-> ' last_name="',in_contact_surname,'"');
-> END IF;
-> select l_where_clause;
->
-> IF in_contact_firstname IS NOT NULL THEN
-> IF l_where_clause<>'WHERE' THEN
-> SET l_where_clause=CONCAT(l_where_clause,' AND ');
-> END IF;
-> SET l_where_clause=CONCAT(l_where_clause,
-> ' first_name="',in_contact_firstname,'"');
-> END IF;
-> select l_where_clause;
->
-> IF in_city IS NOT NULL THEN
-> IF l_where_clause<>'WHERE' THEN
-> SET l_where_clause=CONCAT(l_where_clause,' AND ');
-> END IF;
-> SET l_where_clause=CONCAT(l_where_clause,
-> ' city="',in_city,'"');
-> END IF;
-> select l_where_clause;
->
-> SET @sql=CONCAT('SELECT * FROM employee ', l_where_clause);
->
-> select @sql;
->
-> PREPARE s1 FROM @sql;
-> EXECUTE s1;
-> DEALLOCATE PREPARE s1;
->
-> END$$
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> delimiter ;
mysql> call sp_customer_search_dyn('Tester','Martin','Jason','Toronto');
+----------------------------+
| l_where_clause |
+----------------------------+
| WHERE description="Tester" |
+----------------------------+
1 row in set (0.02 sec)
+----------------------------------------------------+
| l_where_clause |
+----------------------------------------------------+
| WHERE description="Tester" AND last_name="Martin" |
+----------------------------------------------------+
1 row in set (0.02 sec)
+----------------------------------------------------------------------------+
| l_where_clause |
+----------------------------------------------------------------------------+
| WHERE description="Tester" AND last_name="Martin" AND first_name="Jason" |
+----------------------------------------------------------------------------+
1 row in set (0.02 sec)
+------------------------------------------------------------------------------------------------+
| l_where_clause |
+------------------------------------------------------------------------------------------------+
| WHERE description="Tester" AND last_name="Martin" AND first_name="Jason" AND city="Toronto" |
+------------------------------------------------------------------------------------------------+
1 row in set (0.24 sec)
+-----------------------------------------------------------------------------------------------------------------------+
| @sql |
+-----------------------------------------------------------------------------------------------------------------------+
| SELECT * FROM employee WHERE description="Tester" AND last_name="Martin" AND first_name="Jason" AND city="Toronto" |
+-----------------------------------------------------------------------------------------------------------------------+
1 row in set (0.24 sec)
Empty set (0.24 sec)
Query OK, 0 rows affected (0.24 sec)
mysql>
mysql> drop procedure sp_customer_search_dyn;
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> drop table Employee;
Query OK, 0 rows affected (0.00 sec)
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