In Percona’s white paper “Performance at Scale: Keeping Your Database on Its Toes,” we take a high-level approach to what you need to think about when planning for database scalability.
COURSE of the MONTH
15 days, left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
ADO- complete Delphi example
Posted on 2012-12-24
Hello experts,
Problem desc:
- remote Firebird 1.5 server
- 'select * from TABLE'
- 78.567.678.12
- sysdba
- masterkeyxxx
- C:\Database.gdb
- query I am able to cancel at any given time
Question:
How can I do it (using ADO probably) i.e.
TADOConnection
TADODataset (maybe other components)
Thank you!
Problem desc:
- remote Firebird 1.5 server
- 'select * from TABLE'
- 78.567.678.12
- sysdba
- masterkeyxxx
- C:\Database.gdb
- query I am able to cancel at any given time
Question:
How can I do it (using ADO probably) i.e.
TADOConnection
TADODataset (maybe other components)
Thank you!
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
2
2-
2
- +2
8 Comments
the query will continue to run on the server, regardless of the client giving up on it, you need at least firebird 2.1 to be able to abort queries
@sedgwick:
I would like to know exactly how to use ADO components to connect to a distant server, run a query but do not necessary wait until it completes- be able to abort the query on client side and/or server side.
@NickUpson:
If possible, could you please point out how to abort query on the client side and on the server side?
My database running on 1.5 but I guess it will be also well working on 2.1 <- am I correct here?
Thank you!
I would like to know exactly how to use ADO components to connect to a distant server, run a query but do not necessary wait until it completes- be able to abort the query on client side and/or server side.
@NickUpson:
If possible, could you please point out how to abort query on the client side and on the server side?
My database running on 1.5 but I guess it will be also well working on 2.1 <- am I correct here?
Thank you!
Why dont you just call TADOConnection .Cancel
Assuming your query is running in some kind of thread and you have the opportunity to call the cancel method
Assuming your query is running in some kind of thread and you have the opportunity to call the cancel method
1.5 does not have a mechanism to stop a query running on the server
2.1 requires you to delete the correct record from rdb$transactions
2.1 requires you to delete the correct record from rdb$transactions
Ok, I am giving up the idea of canceling running query on the server side.
Is there any clever way of canceling query on the client side?
Thank you!
Is there any clever way of canceling query on the client side?
Thank you!
Featured Post
Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Recently I was talking with Tim Sharp, one of my colleagues from our Technical Account Manager team about MongoDB’s scalability. While doing some quick training with some of the Percona team, Tim brought something to my attention...
Your data is at risk. Probably more today that at any other time in history. There are simply more people with more access to the Web with bad intentions.
- Superb Internet
- IT Administration
- Ransomware
- Storage Software
- Databases
- Cloud Computing, Cloud Services, *Backups, *Online Backup Services, *Backup Software
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have.
In this…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB.
To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses
Course of the Month15 days, left to enroll
770 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.