I have a procedure which accepts a parameter UserID Varchar(10). If I enter a userID which is longer than 10 characters I get the following message:
call procedure1x('Thisismorethanten'); ERROR 1406 (22001): Data too long for column 'UserID' at Row 1.
How do i create an error handler for this error so that when it happens, instead of displaying the sentence above, it says something else like "Try again. The UserID is too long."?
Error handling is typically done using TRY...CATCH block. MySQL uses DECLARE ... HANDLER to handle errors. The documentation has some sample blocks that should help you.
Related
I am trying to write an after insert trigger in mariadb that displays an error but doesn't undo the insert.
I read here mySQL documentation that
"If pval is anything else, p() first signals a warning and sets the message text and error number condition information items. This warning does not terminate the procedure, so execution continues and p() then signals an error. The error does terminate the procedure. The message text and error number set by the warning are replaced by the values set by the error, which are returned with the error information."
This is exactly what I'm trying to do. The trigger is just suppose to display essentially a warning, something along the lines of "insert successful... but hours > allowed_hours" but for my purpose it has to be returned as an error. Does anyone know what the documentation means by "If pval is anything else..."?
Thanks!
I've declared an handler which will handle SQLEXCEPTION, in the clean up code i had it do SELECT 'My Handle';, i ran a script that fails because of a primary key violation and it worked cause i got my output.
the problem with DECLARE ... HANDLE FOR SQLEXCEPTION is that when there is an error it will run though it's doesn't say what error triggered it, so i want to output the error
How do i output the SQL Error using a MySQL Query, i don't care if i can only output the error code/id i just need something to output giving me an indication on what the error is so i can fix the problem
EDIT: in case if it's not obvious, this code is in an SQL Procedure
There is nothing in the DECLARE HANDLER documentation on this functionality. You could handle the errors MySQL returns to your application and print or log them that way.
I actually haven't used any handles, but i think you can make your code into a stored procedure and then run the stored procedure!! You might find MySQL accepts what you are trying to do then.
I am using navicat lite with mysql database.
my database is test
and i have a table named transactions with schema:
date, sharename,buyORsell,quantity,finalrate
I am trying to create a new procedure which takes some input and outputs some results, and I would want that when I execute this procedure, this procedure asks for the input parameter from the user and outputs results accordingly.
My requirement: given a input (transaction type i.e. 'buy' or 'sell'), it should output all the transactions with that type
I create a function and click on procedure
BEGIN
#Routine body goes here...
select * from test.transactions where buyORsell = intype;
END
In the space below, I see:
IN `intype` char
But when I run this prcedure and type sell in "enter parameter" pop-up, I get the error:
Unknown column 'sell' in 'field list'
Please help..
I had the same problem. I fixed it by defining char with a length (i.e. char(254)) and then wrapping the input string in quotes when prompted.
You have an error in your stored procedure definition and forgot to include the intype as a parameter
Looks like it might be a Navicat problem. I now use HeidiSQL for functions and that seems to work fine.
With Navicat, the same problem occurs when I have an input parameter - whether or not I use that paramater. Like Martin I can clear out all the code from BEGIN...END but still get the error if I use any char or varchar input parameter.
In fact, using varchar as an input parameter ALWAYS gives a save/compile error with ANY function using Navicat. With Navicat, Varchar in functions seems completely broken.
I want to abort/quit/return from a stored procedure when a condition is not met.
I'm not sure how to do it. Googling didn't help me much because:
The version of MySql on our servers is 5.1 (<5.5 and hence no signal sqlstate).
I don't want to put everything in if..then..else statements (there will be multiple levels of nesting in my case)
I don't want to call an_invalid_procedure to raise an exception.
Are there alternatives?
Something wrong with....
...
BEGIN
<do stuff>
IF (<your condition>) THEN
<do more stuff>
END IF;
END$$
What I do in such cases is to:
Create table called errors with one column containing textual error messages and UNIQUE index on it. I fill the table with errors I want to support.
When I need specific error to raised, I insert the error message into errors table. Since it's already there, I am violating a UNIQUE key so error is raised. In my application I can watch for MySQL error #1062 (that's the code for 'Duplicate value for key...' error and use regexp to extract my error message to show it to user/log it/whatever;
The problem that I am facing is primarily on Exception Handling! When an exception occurs I want to put that data in another log table with the error message. However, in DB2 I am not able to figure out a way to retrieve the corresponding error message for the raised SQLSTATE.
PS: I have a stored procedure for this migration and I am not using any other language to call it.
Though, I have already queried about this and infact I got some valuable pointers.
Refer: DB2 Exception handling
However, if I use the basic SQLERRM function then for a basic 23502 I get the following message:
"SQLSTATE 23502: An insert or update value is null, but the column cannot contain null values."
Whereas what I really want is the Column name that threw this error, appended to this message! Is there any way, the DB2 could give me a complete error, with the column name the error was raised in?
Thanks in advance ;-)...
Harveer
You need to retrieve all of the tokens from the SQLCA when you encounter such an error. The tokens will contain either the table name and column name, or the numeric table id and column position within the table, starting with zero. The SQLERRM function takes in those tokens and uses them to reconstruct an error message that is as detailed as what you see from the command line.