Throw Error In MySQL Trigger
If I have a trigger BEFORE UPDATE on a table. How can I throw an error that prevents the update on that table?...
triggers
Timer-based event triggers
I am currently working on a project with specific requirements. A brief overview of these are as follows: Data is retrieved from external webservices Data is stored in SQL 2005 Data is manipulated via a web GUI The windows service that communicates with the web services has no coupling with our internal web UI, except via the database....
Building an auditing system; MS Access frontend on SQL Server backend.
So basically I'm building an app for my company and it NEEDS to be built using MS Access and it needs to be built on SQL Server. I've drawn up most of the plans but am having a hard time figuring out a way to handle the auditing system. Since it is being used internally only and you won't even be able to touch the db from outside the b...
Database triggers
In the past I've never been a fan of using triggers on database tables. To me they always represented some "magic" that was going to happen on the database side, far far away from the control of my application code. I also wanted to limit the amount of work the DB had to do, as it's generally a shared resource and I always assumed trigge...
Trigger without a transaction?
Is it possible to create a Trigger that will not be in a transaction? I want to update data on a linked server with a trigger but due to firewall issues we can't create a distributed transaction between the two servers. ...
PLS-00306 error on call to cursor
I'm fairly new to Oracle triggers and PL/SQL still, but I think I might be missing something here. Here is the relevant part of the trigger, CURSOR columnNames (inTableName IN VARCHAR2) IS SELECT COLUMN_NAME FROM USER_TAB_COLUMNS WHERE TABLE_NAME = inTableName; /* Removed for brevity */ OPEN columnNames('TEMP'); And here is the er...
How can I get the definition (body) of a trigger in SQL Server?
Unable to find a SQL diff tool that meets my needs, I am writing my own. Between the INFORMATION_SCHEMA and sys tables, I have a mostly-complete working version. But one thing I can't find in the metadata is the definition of a trigger, you know, the actual SQL code. Am I overlooking something? Thanks. ...
Setting Up MySQL Triggers
I've been hearing about triggers, and I have a few questions. What are triggers? How do I set them up? Are there any precautions, aside from typical SQL stuff, that should be taken? ...
MySQL Trigger & Stored Procedure Replication
Ok,I'm running a setup with a single master and a number of slaves. All writes go through the master and are replicated down to the slaves which are used strictly for reads. Now I have a stored procedure (not function) which is called by a trigger on an insert. According to the MySQL docs, for replication triggers log the call to the t...
How do you priortize multiple triggers of a table?
I have a couple of triggers on a table that I want to keep separate and would like to priortize them. I could have just one trigger and do the logic there, but I was wondering if there was an easier/logical way of accomplishing this of having it in a pre-defined order. ...
T-SQL triggers firing a "Column name or number of supplied values does not match table definition" error
Here's something I haven't been able to fix, and I've looked everywhere. Perhaps someone here will know! I have a table called dandb_raw, with three columns in particular: dunsId (PK), name, and searchName. I also have a trigger that acts on this table: SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER TRIGGER [dandb_raw_searchNa...
MySQL triggers + replication with multiple databases.
I am running a couple of databases on MySQL 5.0.45 and am trying to get my legacy database to sync with a revised schema, so I can run both side by side. I am doing this by adding triggers to the new database but I am running into problems with replication. My set up is as follows. Server "master" Database "legacydb", replicates to s...
SQL Server 2005 multiple database deployment/upgrading software suggestions
We've got a product which utilizes multiple SQL Server 2005 databases with triggers. We're looking for a sustainable solution for deploying and upgrading the database schemas on customer servers. Currently, we're using Red Gate's SQL Packager, which appears to be the wrong tool for this particular job. Not only does SQL Packager appear ...
SQL - How do you compare a CLOB
in a DB2 trigger, I need to compare the value of a CLOB field. Something like: IF OLD_ROW.CLOB_FIELD != UPDATED_ROW.CLOB_FIELD but "!=" does not work for comparing CLOBs. What is the way to compare it? Edited to add: My trigger needs to do some action if the Clob field was changed during an update. This is the reason I need to comp...
How to check if a trigger is invalid?
I'm working on databases that have moving tables auto-generated by some obscure tools. By the way, we have to track information changes in the table via some triggers. And, of course, it occurs that some changes in the table structure broke some triggers, by removing a column or changing its type, for example. So, the question is: Is th...
Best Method to Spawn Process from SQL Server Trigger
How would I go about spawning a separate process using a SQL Server 05/08 trigger? Ideally, I would like to spawn the process and have SQL Server not wait on the process to finish execution. I need to pass a couple parameters from the insert that is triggering the process, but the executable would take care of the rest. ...
Database Duplicate Value Issue ( Filtering Based on Previous Value)
Earlier this week I ask a question about filtering out duplicate values in sequence at run time. Had some good answers but the amount of data I was going over was to slow and not feasible. Currently in our database, event values are not filtered. Resulting in duplicate data values (with varying timestamps). We need to process that data ...
Javascript: Trigger action on function exit
Is there a way to listen for a javascript function to exit? A trigger that could be setup when a function has completed? I am attempting to use a user interface obfuscation technique (BlockUI) while an AJAX object is retrieving data from the DB, but the function doesn't necessarily execute last, even if you put it at the end of the func...
Using WPF, what is the best method to update the background for a custom button control?
In WPF, we are creating custom controls that inherit from button with completely drawn-from-scratch xaml graphics. We have a border around the entire button xaml and we'd like to use that as the location for updating the background when MouseOver=True in a trigger. What we need to know is how do we update the background of the border i...
Triggers vs Constraints
I'm trying to find out whether I should be using business critical logic in a trigger or constraint. So far I've added logic in triggers as it gives me the control over what happens next and means I can provide custom user messages instead of an error that will probably confuse the users. Is there any noticable performance gain in using...