I've been tasked with finding a way to migrate data into a DB2 AS400 database. When the data is entered (currently manually) on the front end, the system is doing some calculations and inserting the results in a table.
My understanding is that it's using a trigger to do so. I don't know very much about this stuff, but I have written code to directly insert values into that same table. Is there a way for me to figure out what trigger is being fired when users enter data manually?
I've looked in QSYS2/SYSTRIGGERS and besides not making much sense to me, I see no triggers that belong to the SCHEMA with my table in it.
Any help here would be awesome, as I am stuck.
SELECT *
FROM QSYS2.SYSTRIGGERS
WHERE TABSCHEMA = 'MYSCHEMA'
AND TABNAME = 'MYTABLE'
Should work fine.
If you'd prefer to use a 5250 command line, the Display File Description (DSPFD) command will show you the triggers on a file (table)
DSPFD FILE(MYSCHMA/MYTABLE) TYPE(*TRG)
Lastly, trigger information is available via the IBM i Navigator GUI. Either the older fat client version or the newer web based one.
Related
We have an internal resource used by our developers and support to help identify data issues when we are diagnosing problems in our system. It's used to support a collection of data feeds and they are very customized. What we would like to do is allow one of our users to click the name of a stored procedure and then view the CREATE script of that stored procedure. This is done on an ASP.NET form.
I can get this information by using this statement:
select object_definition(object_id(routine_name))
from information_schema.routines
where routine_name like '%sprocname%'
However, the returned script is unformatted and in a single cell, on a single line. Is there a way for me to format this as if I had right-clicked on the stored procedure in SSMS and select "Script stored procedure as CREATE to"? Because it is all on a single line, if I have commented any portion of the procedure out using two dashes it comments the entire rest of the procedure that follows it.
I have been searching for the condition, where, lets say when we enable time travel to a certain table in DB2 , but don't want to capture all the updates done, but only the updates that's done by some specific user.
Wanted to know if this is at all possible with the DB2 time travel and how we can achieve it .
It's not possible with DB2 temporal tables.
Alter the temporal table add a user column maintained by system.
db2 for Iseries column shown
EMP_CHANGE_USER VARCHAR(18) GENERATED ALWAYS AS (USER)
The new column will go automatically to the history table of the temporal table. You can report on the history table and have emp_change user.
Note: IRL Don't single out users. You can give management a report that lists out all users and management can filter it down to individuals. Programmers do not single out users for reporting and logging.
I have a database with about 50 something tables. I would like to run the report "Data Dictionary" on each table.
Ideally, I would like them all to be in one report, for example, in PGAdminIII, if I right click select "Tables" I will get a report of all the 'objects' and under each one a data dictionary report.
Is there an automatic way of doing this, or an plugin that I can install to postgres? Or is there something analogous to this?
If I understand correctly, you're referring to the ability to right mouse click on a table in PgAdminIII and select Reports > Data Dictionary report?
I'm not aware of any way to do that from PgAdminIII. You could look into using a different tool such as SchemaSpy. Another option (as alluded to by #kgrittn) is to use psql \d with the \H flag to generate html output. My solution (since SchemaSpy didn't do what I needed, and I needed the same output for both Postgres and Oracle) was to roll my own using perl, DBD::Pg and Template::Toolkit.
Update: Added GitHub link.
I wrote a fairly simple Postgres data dictionary generator in Python that spans all schemas and tables within a specified database. If it doesn't have exactly what you want it would be fairly easy to modify.
https://github.com/kylejmcintyre/pypostgreports
Is there a quick way to find out when last change took place in some table?
EDIT:
I realize that i can add a column which will hold a change date, but i am wondering if there is some kind of metadata that can be accessed by EF. My db is hosted on SQL Server 2008.
Add a 'last updated' column to your table and query that one for the latest change.
Update: If that is not an option as per the update to the question, you could:
a) create a separate db table with table name and date/time and update that one with triggers on the table you want to track.
...or...
b) since you're using SQL Server 2008 you could possibly do something with SQL Server change tracking. There's no built-in support for change tracking in EF, but that doesn't prevent you from using it 'on the side'...
I have a (very simple and standard) UPDATE statement which works fine either directly in Query Analyser, or executed as a stored procedure in Query Analyser.
UPDATE A
SET
A.field1 = B.col1
, A.field2 = B.col2
FROM
tblA AS A INNER JOIN tblB AS B
ON A.pk1 = B.pk1 AND A.pk2 = B.pk2
Problem is when i execute the same stored proc via microsoft ADP (by double-clicking on the sproc name or using the Run option), it says "query ran successfully but did not return records" AND does NOT update the records when i inspect the tables directly.
Before anyone even says "syntax of MS-Access is different than SQLServer T-SQL", remember that with ADP everything happens on the server and one is actually passing thru to T-SQL.
Any bright ideas from any ADP gurus out there?
Gotcha. Responding to my own question for the benefit of anyone else.
Tools / Options / Advanced / Client-Server Settings / Default max records is set at 10,000 (presumably this is the default). Change this to 0 for unlimited.
My table had 100,000+ rows and whatever set of 10,000 it was updating was difficult to find ( among a sea of 90,000+ un-updated rows ). Hence the update did not work fully as expected.
Try and see whether the query gets executed on the SQL Server using SQL profiler.
Also, I think you might need to close the linked table & re-open it to see the updated records.
Does that work?
Run the query with SQL PRofiler running. Before you start the trace add in all the error events. This will give you any errors that the SQL Server is generating that the Access ADP might not be showing correctly (or at all).
Feel free to post them here.
Just as a reference, here's a paper I wrote on Update Queries that discusses some of the issues associated with when the fail.
http://www.fmsinc.com/microsoftaccess/query/snytax/update-query.html
I seem to remember that I always got the "didn't return any rows" message and had to simply turn off the messaging. It's because it isn't returning any rows!
as for the other - sometimes there's a primary key issue. Does the table being updated have a primary key in SQLServer? If so, check the view of the table in Access - sometimes that link doesn't come through. It's been a while, so I could be wrong, but I think you may need to look at the design view of the table while in access and add the primary key there.
EDIT: Additional thought:
in your debugging, try throwing in print statements to see what the values of your inputs are. Is it actually picking up the data from the table as you expect when you execute from access?