MySql - Create Table If Not Exists Else Truncate?

Question

Here is the updated question:

the current query is doing something like:

$sql1 = \"TRUNCATE TABLE fubar\";
$sql2 = \"CREATE TEMP         


        

Answer 1

execute any query if table exists.

Usage: call Edit_table(database-name,table-name,query-string);

• Procedure will check for existence of table-name under database-name and will execute query-string if it exists. Following is the stored procedure:

DELIMITER $$

DROP PROCEDURE IF EXISTS `Edit_table` $$
CREATE PROCEDURE `Edit_table` (in_db_nm varchar(20), in_tbl_nm varchar(20), in_your_query varchar(200))
DETERMINISTIC
BEGIN

DECLARE var_table_count INT;

select count(*) INTO @var_table_count from information_schema.TABLES where TABLE_NAME=in_tbl_nm and TABLE_SCHEMA=in_db_nm;
IF (@var_table_count > 0) THEN
  SET @in_your_query = in_your_query;
  #SELECT @in_your_query;
  PREPARE my_query FROM @in_your_query;
  EXECUTE my_query;

ELSE
  select "Table Not Found";
END IF;

END $$
DELIMITER ;

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