Sybase ASE or IQ ?
Version ?
Main Topics
Browse All Topics
Loading Advertisement...
Question
Partition in Sybase for record insertion & select query
Hi, I am new to Sybase. We need to create Partition in Sybase for record insertion.I am guessing that, we can count number of records & if it exceeds the certain threshold limit, we can rename the current table to something like table_001 & we can create new table with the table name to continue the process of inserting the record. Please advise & correct me on this. Also Once the partition is done, how can we fetch the records using select statement without giving the partition table name? For example, if the record is in table_005, do i need to specify partition name table_005 in select query? Or do i need to give only table name in selectquery(Not Partition name). Does Sybase take care of itself in finding the correct parition where my record exists which is in where clause of the select query? Please give me more insight on this,Thanks in advance,Thanks,ram
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Subscribe now for full access to Experts Exchange and get
Instant Access to this Solution
- Plus...
- 30 Day FREE access, no risk, no obligation
- Collaborate with the world's top tech experts
- Unlimited access to our exclusive solution database
- Never be left without tech help again
Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.
- "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
- "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
- "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.
See what Experts Exchange can do for you.
Got a question?
We've got the answer.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
Need individual assistance?
Our experts are ready to help.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Want to learn from the best?
Read articles from industry experts.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Working on a long term project?
Store your work and research.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
What Makes Experts Exchange Unique?
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Trusted by the world's most respected brands.
Faithfully serving IT professionals since 1996.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Free Tech Articles
-
WARNING: 5 Reasons why you should NEVER fix a computer for free.
It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
-
SCCM OSD Basic troubleshooting
SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
-
Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
-
Create a Win7 Gadget
This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
-
Outlook continually prompting for username and password
There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
-
Backup Exchange 2010 Information Store using Windows Backup
There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...
Cloud Class Webinars
- Avoiding Bugs in Microsoft Access
Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
- Top 10 Best New Features in Visio 2010
Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
- IT Consultant Business Secrets Revealed
Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
- Disaster Recovery and Business Continuity
Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
- Organize Your Visio Diagrams with Containers and Lists
Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
- How to Us Objects, Properties, Events and Methods in Microsoft Access
Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...
Join the Community
Give a Little. Get a Lot.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
Answers
(From the tags this is IQ 12.7)
Bill's already given you the right answer, but there's a bit more still to say.
To answer your specific question,
> Does Sybase take care of itself in finding the correct parition where my record exists which is in where clause of the select query?
If you:
1) create a view containing one or more UNIONs of SELECTs of your underlying tables
2) use the view in your queries
then yes. Simply referring to the tables won't help you.
However you haven't said enough here that makes me think you even need to do this. "Record insertion" doesn't justify UNION in VIEW. (As Bill says you don't really have partitions on the tables in IQ yet.)
Another gotcha - you *really* need PRIMARY KEYs on the PKs of the underlying tables. Simply creating a unique HG index isn't enough (even though a PRIMARY KEY is implemented as a unique HG) because PK clauses give the optimiser more information. If the PKs are composite (multiple columns), create a PRIMARY KEY clause on the composite key, but also create HG indexes (regardless of cardinality) on each of the columns in the PK.
If you're asking about IQ partitioning with the goal getting more I/O parallelism, also take a look at the IQ DISK_STRIPING option (which is on by default). This option causes IQ to automatically spread I/O across multiple db spaces. See:
http://infocenter.sybase.c
http://infocenter.sybase.c
This isn't as nice as partitioning (eg., you can't partition data by date range), but it's helps performance is you have multiple disk controllers and disks.
(I saw the tags, but from the questions and approach, this may be ASE. Why bother with that kind of partitioning in IQ, renaming tables, how to get at the data in the old table ...)
I think the simple answer is:
1 Do nothing. The software (ASE or IQ) will continue working as is.
2 Read the manuals
3 Get clear about what you actually need to do
4 If you are uncertain about HOW to do that, post a question.
Cheers
3 Ways to Join
Business Accounts
- Perfect for organizations
- Multiple users
- Save over 36%
- Create a Business Account
Answer for Membership
- Earn free access
- Showcase your knowledge
- No credit card required
- Sign Up to Answer
Loading Advertisement...
by: grant300Posted on 2008-11-08 at 09:45:01ID: 22913092
Sybase IQ 12.7 does not support partitioning per se. It does, however have special support and optimizations in views for combining tables as if they were partitions.
You can do what you want not by renaming the table but by creating your "partition" tables and then layering a view on top. You probably need at least two views; one for the "current" parition you want to load data into and one that has the UNION of all the partitions.
There are a couple of issues to take into account here. First, you have to decide why you are splitting up the table. If you are doing it because your data volumes are very large and you are trying to minimize the load time caused by index reorganization in pass 2, then this technique works great. For example, you can create a table for each month and keep the most recent 6 months in the Union view. At the end of the 7th month, you change the view to include the next table and drop the oldest month table from the view. You can also truncate it to purge old data or keep the table around as an archive of sorts so that you can go back to the old data yet it does not effect the performance of loads and queries on recent data.
If you are expecting it to reduce your query times, you may be dissapointed, particularly if you are running on a smaller machine with just a few CPUs/licenses. Since the query engine and optimizer have no idea what records are in what tables, you are actually running your query on each one of the underlying tables and then corellating the results. This can be counter productive unless you can create a view that refers to only some of the paritition tables; say 6 months worth out of two years total in the database.
IQ 15, currently in early beta, does support semantic paritioning. The question remains as to whether Sybase will do with this feature what they did with it in ASE and charge an additional license fee for it.
Finally, I hope you are not trying to load the tables with Insert statements. The performance of that technique leaves a lot to be desired given the column store nature of Sybase IQ. By far the fastest and most flexible way to get data into IQ is with the LOAD TABLE statement. Depending on what you are doing, it can be anywhere from 10 to 1000 times faster than straight SQL Insert statements.
Regards,
Bill