I want to create a trigger for a firebird database, but have never done it before.
I want the trigger to fire when it leaves a record in a table JOBLINES. Is the trigger action "BEFORE UPDATE". The purpose of the trigger is to check a field has a value in it before being saved.
Do I want ACTIVE BEFORE?
How do I stop the database saving the new line if it doesn't meet the criteria?
What does position refer to in a trigger?
What if I want to use SQL to check the validity of the field entry?
I imagine "new." refers to a record that hasn't been saved yet. What if I want to check a line that has been edited?
CREATE TRIGGER CHECK_RELATED_JOB FOR JOBLINES
ACTIVE BEFORE
UPDATE
POSITION 0
AS
begin
If new.AdditionalField_05 is null then
Showmessage('Assign Job for income');
end;
Related
I have an update trigger that does what it needs to do: update a datefield triggered by an after update trigger.
However, when I edit the contents of a table through SSMS (right-click - Edit top 200 rows) it gives me a message that the row couldn't be committed. The error:
The data in row x was not committed.
Eror message: The row value(s) updated or deleted either do not make the row unique or they alter multiple ows(2rows).
If i disable the trigger an update through the interface works just fine.
The same upate through an TSQL update statement works fine when the trigger is activated (and trigger does what it needs to do)
What is causing this behaviour and how can I have ànd the trigger ànd update through the interface?
Lots of my updates are queries that contain single quotes so it is easier to paste them than write an update statement to update them)
The issue is that triggers apparently just don't play nice when using the edit functionality
I am using heroku connect to sync My data with salesforce.
I need to change a field in a column after the data is synced.
SO I created a trigger after insert in postegressql that will change that column value. The problem is that when I change the value in the trigger, Heroku is not considering that a change has happened so the data is not synced.
to clarify I have an object in sales force with column name isInsertedInHeroku. By default it is false. in the postegres after insert I am changing it to true but this value is not changing in salesforce, any idea?
this is my trigger.
Please note that I already added the externalId field and when I manually update the value with an update query it will change. this is not working only when I change thru trigger.
BEGIN
UPDATE salesforce.notification__c
set isInsertedInHeroku= true
where sfid = new.sfid;
Return new;
end;
I am seeking suggestions on methods to trigger the running of code based on specific event occurring.
Basically I need to monitor all inserts into a table and compare a column value against a parameter set in another table.
For example, when a new record is added to the table and the column [Temperature] is greater than 30 (which is a value set in another table). Send an alert email to notify of this situation.
You can create a trigger (special type of stored procedure) that is automatically executed after an insert happened. Documentation for triggers is here: https://technet.microsoft.com/en-us/library/ms189799(v=sql.120).aspx
You will not be able to send an email out of SQL Database though.
Depending on how quick you need the notification after the insert, maybe you could make an insert into yet another table from within the trigger and query this new table periodically (e.g. using a script in Azure automation) and have the email logic outside the database.
I want to call a certain procedure that logs everytime a database user is created or deleted in the db ( sql Anywhere 16).
For this i have written a Function that should be called via a trigger when a row is inserted or deleted from table SYS.SYSUSER.
However, I am not able to create a trigger on this table.
Am i allowed to create trigger on this or is there someother way to get notified whenever a user is created or deleted for db?
New to sybase please help.
heres is my create trigger code
CREATE TRIGGER myTrigger AFTER INSERT ON sys.sysuser
REFERENCING NEW AS newRecord
FOR EACH ROW
BEGIN
--
END;
You cannot create a trigger on a system table. You can create a handler for "system events", which are described in the online SQL Anywhere documentation. Unfortunately, creation or deletion of users is not a system event that can be handled. I don't believe there's a way short of polling that you can do what you want to do.
Full disclosure: I work for SAP in SQL Anywhere engineering.
I am using Postgres 9.3.
I just added a trigger to a table.
It is an after insert trigger which is executed for each row after each statement.
I coded the trigger function assuming the index of the same table contains the newly added rows.
If this is not true, mass inserts will slow down significantly.
I google it a bit but couldn't find an answer.
So, to sum up my questions is after a statement, is index updated before or after the "after insert trigger for each statement" in Postgres 9.3?
Here is the trigger definition I've used:
CREATE TRIGGER trigger_name
AFTER INSERT OR UPDATE
ON table_name
FOR EACH STATEMENT
EXECUTE PROCEDURE trigger_funtion();
An AFTER trigger FOR EACH ROW will see that row in the table. For that to happen reliably the row must have already been added to any indexes. So the index has been updated.
However, if you attempt to modify the table that caused the AFTER trigger to be fired within the AFTER trigger, this usually results in an infinite loop and an error. It is rarely the correct thing to do.
Usually when you're trying to do that, you actually want a BEFORE trigger that modifies the row before it is saved.
If you need to modify some other row in the same table, that often suggests a data model problem. You should very rarely, if ever, need to modify one row in a table using a trigger when a different row is modified.