stored-functions

Our database has a function to generate an order number. It reads a value from a Settings table, increments it, then returns the new value. For example: CREATE FUNCTION NextOrderNumber() RETURNS INTEGER UNSIGNED NOT DETERMINISTIC BEGIN DECLARE number INTEGER UNSIGNED; UPDATE Settings SET IntegerValue=LAST_INSERT_ID(IntegerValue+1) WHERE KeyName='NextOrderNumber'; SET number=LAST_INSERT_ID(); return number; END Note: Don't critique this function I know it has flaws it's just for illustration. We use this function as follows: INSERT INTO Orders(OrderNumber, ...) SELECT NextOrderNumber(), ...

OK so I have read a whole bunch of articles suggesting table-value functions and cross apply give better performance than a scalar udf. I wanted to write my function in both ways and then test to see which one is better - but I cannot figure out what I'm supposed to use/look for to understand which is the better option. I'm using SQL Server 2005. I've tried running the estimated execution plan, the actual execution plan and analyze query in database engine tuning advisor and I don't know what it is trying to tell me. Using showplan_all on /off it looks like the table based function will use

What is the MySQL command to view the definition of a stored procedure or function, similar to sp_helptext in Microsoft SQL Server? I know that SHOW PROCEDURE STATUS will display the list of the procedures available. I need to see a single procedure's definition. afftee SHOW CREATE PROCEDURE <name> Returns the text of a previously defined stored procedure that was created using the CREATE PROCEDURE statement. Swap PROCEDURE for FUNCTION for a stored function. Haim Evgi You can use this: SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = 'yourdb' AND ROUTINE_TYPE

I have a Program that will auto run each night, run a query, and email results. In my program I am calling a function as part of the query... What i'd like to is pass the date the program is run as the parameter. (@startdate and @enddate) @startdate will always be "today's" date at 00:00:00 and enddate will always be "Todays date" at 23:59:59. So for example. If the program was run tonight, it would pass 1/31/13 as the date. Tomorrow, it would pass 2/1/13 as the date, the next date 2/2/13, etc. If I can do this at the query level that is fine as well... Below is my code: SELECT SUM(QTY) AS

I'm quite new to subject of writting stored function for mySQL database, hence i'm not sure if what i'm trying to do here is possible at all. I need a function that will return a column from random row from a table. I don't want to use ORDER BY RAND() method to do that, rather i would do this like this: DECLARE MAX_COUNT INT DEFAULT 120000; DECLARE rand_offset INT; DECLARE str_rnd_word VARCHAR(255); SET rand_offset = FLOOR((RAND() * MAX_COUNT)); SELECT word INTO str_rnd_word FROM all_words LIMIT 1 OFFSET rand_offset ; RETURN str_rnd_word; MySQL throws an error upon creating function with body

What is the mechanism to force the MySQL to throw an error within the stored procedure? I have a procedure which call s another function: PREPARE my_cmd FROM @jobcommand; EXECUTE my_cmd; DEALLOCATE PREPARE my_cmd; the job command is: jobq.exec("Select 1;wfdlk# to simulatte an error"); then: CREATE PROCEDURE jobq.`exec`(jobID VARCHAR(128),cmd TEXT) BEGIN DECLARE result INT DEFAULT 0; SELECT sys_exec( CONCAT('echo ',cmd,' | base64 -d > ', '/tmp/jobq.',jobID,'.sh ; bash /tmp/jobq.',jobID,'.sh &> /tmp/jobq.',jobID)) INTO result; IF result>0 THEN # call raise_mysql_error(result); END IF; END; My