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create MySQL table if not exists, ignore the talbe if it exists but still needs checking.

marrowyung
marrowyung asked
on
648 Views
Last Modified: 2014-01-08
right now I have the script to only create table if it doesn't exist:

CREATE PROCEDURE `create_auditriggers_forALL` (IN databaseName VARCHAR(40))  	
BEGIN  
DECLARE a, b, finished  INT DEFAULT 10;
DECLARE temptable VARCHAR(50);	
DECLARE today TIMESTAMP DEFAULT CURRENT_DATE;
DECLARE v1, v2, v3 TINYINT ;
DECLARE current_tablelist VARCHAR(50) DEFAULT ""; 
DECLARE fullexcutecmd VARCHAR(5000);
DECLARE fullexcutecmd2 VARCHAR(5000) ;
DECLARE BEFORE_DELETE TEXT  ;
DECLARE Final_BEFORE_DELETE TEXT DEFAULT "";
DECLARE AFTER_INSERT TEXT  ;
DECLARE Final_AFTER_INSERT TEXT DEFAULT ""  ;
DECLARE AFTER_UPDATE TEXT  ;
DECLARE Final_AFTER_UPDATE TEXT DEFAULT "";
DECLARE Check_Each_PrimaryKey_Autoincrement TEXT  ;
DECLARE Final_Check_Each_PrimaryKey_Autoincrement TEXT DEFAULT "";
DECLARE Check_index TEXT  ;
DECLARE Final_Check_index TEXT DEFAULT "";
 
 declare tablename CURSOR FOR 	

         SELECT  DISTINCT TABLE_NAME 	
    FROM INFORMATION_SCHEMA.TABLES
    WHERE TABLE_SCHEMA=databaseName and table_type<> 'view' ;  
  

    
DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;     
/*Specify what to do when no more records found, notice that the handler declaration must appear after variable and cursor declaration inside the stored procedures*/  	

OPEN tablename;	

	get_tabeslist: LOOP	
 
   FETCH tablename INTO current_tablelist;	
         IF finished = 1 THEN 	
          LEAVE  get_tabeslist;	
          END IF;	
  /* create the audit database's table */
  
SET @fullexcutecmd =CONCAT( 'CREATE TABLE IF NOT EXISTS Audit_info.',databaseName,'_DBAudit_', current_tablelist,' LIKE ',databaseName,'.',current_tablelist,';'); 
 
  PREPARE stmt FROM @fullexcutecmd;
  EXECUTE stmt;
  DEALLOCATE PREPARE stmt;  


  END LOOP  get_tabeslist;	
close tablename;                             

END $$
DELIMITER ; 
    

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but it seems that if I execute this SP more than one time, and it see the same table which was created, will give error message and stop.

Anyway to fix it ?
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