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Dynamic SQL to get a parameter and use it in LIKE for a new table created inside a stored procedure
For this, use prepared statement. Let us first create a table −
mysql> create table DemoTable1973 ( StudentId int, StudentName varchar(20) ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1973 values(101,'Chris'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1973 values(102,'John Doe'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1973 values(103,'David'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1973 values(104,'John Smith'); Query OK, 1 row affected (0.00 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1973;
This will produce the following output −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 101 | Chris | | 102 | John Doe | | 103 | David | | 104 | John Smith | +-----------+-------------+ 4 rows in set (0.00 sec)
Following is the query to create a stored procedure and a new table with LIKE clause having a value from procedure call −
mysql> DELIMITER //
mysql> create PROCEDURE demo_create(IN newTableName varchar(20),IN tbl varchar(20))
BEGIN
DROP TABLE IF EXISTS newTableName;
SET @query= CONCAT('CREATE TABLE newTableName as SELECT * from DemoTable1973 WHERE StudentName like ''%',tbl,'%''');
PREPARE ps FROM @query;
EXECUTE ps;
END
//
Query OK, 0 rows affected (0.00 sec)
mysql> DELIMITER ;Call the stored procedure using call command −
mysql> call demo_create('newTableName','John');
Query OK, 2 rows affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from newTableName;
This will produce the following output −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 102 | John Doe | | 104 | John Smith | +-----------+-------------+ 2 rows in set (0.00 sec)
Updated on: 31-Dec-2019
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