Question

I am creating a SQL script file in MySQL. The script simply creates a table and some stored procedures. I have two questions.

1. I need to check if table exists, skip the create table statement.
   But if procedure exists, drop it and then create a new one. Here is
   the code I am trying –

   CREATE TABLE IF NOT EXISTS Student (   
       Id INT PRIMARY KEY,   Name
       VARCHAR(100) NOT NULL 
   );
   
   DROP PROCEDURE IF EXISTS usp_StudentInsert;
   
   DELIMITER $$
   CREATE PROCEDURE usp_StudentInsert(
       id INT, 
       name VARCHAR(100)) 
   BEGIN    
       INSERT INTO Student(Id, Name) VALUES(id, name); 
   END$$
   
   DROP PROCEDURE IF EXISTS usp_StudentRetrieve;
   
   DELIMITER $$ 
   CREATE PROCEDURE usp_StudentRetrieve(studentId INT)
   BEGIN
       SELECT * FROM Student WHERE Id = studentId;
   END$$
   

   There is an error “SQL Syntax Error near DROP PROCEDURE IF EXISTS
   usp_StudentRetrieve”;

2. What is best way to execute script file using PHP code?

Thank you in advanced.

Ritesh

PS – I am using MySQL Workbench V5.2 with MySQL 5.1, if it helps.

Answer 1

I added a space after delimiter and it works for me:

from delimiter$$ to delimiter $$

mysql> CREATE PROCEDURE usp_StudentInsert(id INT,name VARCHAR(100)) 
    -> BEGIN
    ->  INSERT INTO Student(Id, Name) VALUES(id, name); 
    -> END
    -> $$
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter ;
mysql> drop procedure usp_studentinsert;
Query OK, 0 rows affected (0.00 sec)

EDIT:

mysql> DROP PROCEDURE IF EXISTS usp_StudentInsert;
Query OK, 0 rows affected (0.00 sec)