Regexp and performance
ahoj!
i want to create an index on a column that i query via an regular expression, for example ...where regexp_like(phone.extension_col, whitelist.extension_col)...
phone.extension_col is the column with the phonenumber-extensions i want to query and whitelist.extension_col is a list of extension that are allowed. whitelist contains extensions like 2450 AND extensions as regular expressions like ^8...$!
i tried to create an index on phone.extension, but it doesn't work:
create index idx_extension on phone (regexp_like(extension_col, '^8...$'));
-> ORA-00904 column name not valid
someone can help me? thx!
bye,
christian
hi,
i think u have given a wrong column name,
create index idx_extension on phone (regexp like('phone.extension_col', 'whitelist.extension_col'));
I dont know above would work or not, but u havae to look for correct column name by looking at the error
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_5010.htm
regards
Jafar
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Hi,
I am doing some testing about MDX formulas and performance. I found a performance issue but I can not understand why is taking so long time a report.
The situation is:
I create a report or a MDX query with:
6 dimensions in row and 1 dimension in column
rows:
Period - Filtered using a member
Year - Filtered using a member
Relationship Manager - Filtered using a member
Report Type - Filtered using a member
Local Relationship Manager - 4400 members level 0
Global Relationship Manager - 10400 members level 0
Column:
Account dimension, only a member
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Do you consider this time is reasonable when I am using this formula?
The mdx report is:
With
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set [_Report Type0] as '{[Report Type].[RM.Local]}'
set [_Year2] as '{[Year].[FY-2013]}'
select
{ [Account].[Expenses]
} on columns,
NON EMPTY {crossjoin({[_Local Relationship Manager3]},crossjoin({[_Global Relationship Manager4]},crossjoin({[_Period0]},crossjoin({[_Relationship Manager4]},crossjoin({[_Report Type0]},{[_Year2]})))))} properties MEMBER_NAME, GEN_NUMBER, [Global Relationship Manager].[MEMBER_UNIQUE_NAME], [Global Relationship Manager].[Memnor], [Local Relationship Manager].[MEMBER_UNIQUE_NAME], [Local Relationship Manager].[Memnor], [Relationship Manager].[MEMBER_UNIQUE_NAME], [Relationship Manager].[Memnor], [Period].[Default], [Report Type].[Default], [Year].[MEMBER_UNIQUE_NAME], [Year].[Memnor] on rows
from [DICISRM.DICISRM]Ok Try this one
But here you have to change the MDX formula every month.
Year
--FY2009
--FY2010
--FY2011
--FY2012
Period
--TotalYear
----Qtr1
-------Jan
-------Feb
-------Mar
Let say if you're CurrentYear is FY2011 and you're Current Month is March then you're MDX will be
case when contains([Year].CurrentMember,MemberRange([FY2009],[FY2010])) and contains([Period].CurrentMember,MemberRange([Jan],[Feb]))
Then
B
else
C
end
For the Next month you just have to make a change in the MemberRange I.e.,(Replace Feb with Mar)
*case when contains([Year].CurrentMember,MemberRange([FY2009],[FY2010])) and contains([Period].CurrentMember,MemberRange([Jan],[Mar]))*
Then
B
else
C
end
I tested it and Its working fine.
I think this will solve you're problem but there might be a more elegant solution out there.
Regards,
RSG -
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QuestionHow can I optimize my hard disk drive usage and performance in Windows 8 or Windows 7?
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Use Toshiba HDD Protection
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Windows 8 and Windows 7 optimize hard disk drives automatically through a process called defragmentation. Unless you've disabled this, you don't need to do anything. If you have disabled this and want to run the process, you can still do so.
In Windows 8, search for "Defrag" at the Windows Start screen and select "Defragment and optimize your drives."
In Windows 7, search for "Defrag" in the Start Menu's search field and select "Disk defragmenter."
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Remove items from startup
Some applications run automatically when Windows starts. This can add additional functionality, but it also decreases the performance of your computer. Sometimes you might want to disable certain programs from starting automatically.
In Windows 8, search for "Task Manager" at the Start screen. Select the "Startup" tab. Select an application you'd like to disable from starting automatically and then click the "Disable" button in the lower-right.
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You should be sure of the purpose of an application before disabling it from starting automatically. Some applications might be important. If in doubt, you might consider searching on the Web to discover more information about a program. Remember that if you find that you disabled something vital, you can always re-enable it.
For more information, please see the following video:QuestionHow can I optimize my hard disk drive usage and performance in Windows 8 or Windows 7?
AnswerThere are a few simple steps you can take to ensure your hard disk drive is used optimally.
Use Toshiba HDD Protection
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For more information on this utility, see the following article:
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Reduce the operating temperature and increase battery life
The battery in your notebook PC is designed to provide the necessary amount of energy for the processor while maintaining HP high safety standards. As a result, the battery may not charge or may stop providing power to the notebook when the battery temperature exceeds the specified, design safety level.
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Do's
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||-Although I am working on behalf of HP, I am speaking for myself and not for HP.-||
//Click on Kudos if my reply was helpful and answered your question//
||-If my answer solved the problem please mark the topic as the accepted solution-||I hope the above article will help you guys..
||-Although I am working on behalf of HP, I am speaking for myself and not for HP.-||
//Click on Kudos if my reply was helpful and answered your question//
||-If my answer solved the problem please mark the topic as the accepted solution-|| -
Hi all.
I have an issue in Scripts.
we are using standard program as print progarm and a zform as form.
we want to print some text in themain window of the form.
for that one I created a new progarm for form and perform.
in taht form i am using this function module read_text to read the text.
i sending all this text to an internal table.
up to thuis ok...
While the data transfering from form to perform (i.e to the form(script)) only the last line of the internal table is transfering.
and i declared the exporting TABLE OF TYPE ITCSY.
CAN ANY BODY HELP TO SOLVE THIS ISSUE,
THANKS IN ADVANCE,
rEGARDS,
ESWAR.MHi venkat,
1. while calling subroutines from sapscripts,
there is a special technique,
which has got its own limitations.
2.
FORM abc
TABLES
in_tab STRUCTURE itcsy
out_tab STRUCTURE itcsy.
ENDFORM.
3. The perform in se38 program should be of the
above format only.
4.<b> We cannot pass internal tables.</b>
5. Rather we need to pass
VARIABLE NAME
VARIABLE VALUE
(see the structure of itcsy in se11)
6. In this form, we have to read
the internal table in_tab
to capture the variable name and its value.
7. Similary, to return the values,
we have to put one record (for each variable)
in out_tab.
regards,
amit m. -
Cache and performance issue in browsing SSAS cube using Excel for first time
Hello Group Members,
I am facing a cache and performance issue for the first time, when I try to open a SSAS cube connection using Excel (using Data tab -> From Other Sources --> From Analysis Services) after daily cube refresh. In end users
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GO
I will update the post after I receive the actual im[provement from UAT/ Production environment.
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Hi Everyone,
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Reference:
https://technet.microsoft.com/en-us/library/ee836145.aspx
Also you can have a look at the blog:
http://www.chrismcnulty.net/blog/Lists/Posts/Post.aspx?ID=74
https://yossidahan.wordpress.com/2012/08/14/cant-get-ssas-databases-to-appear-in-performance-point-dashboard-designer-check-you-adomd-net-version/
Best Regards,
Eric
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected] -
I am a scientist and run my own business. Money is tight. I have some very large Excel files (~200MB) that I need to sort and perform logic operations on. I currently use a MacBookPro (i7 core, 2.6GHz, 16GB 1600 MHz DDR3) and I am thinking about buying a multicore MacPro. Some of the operations take half an hour to perform. How much faster should I expect these operations to happen on a new MacPro? Is there a significant speed advantage in the 6 core vs 4 core? Practically speaking, what are the features I should look at and what is the speed bump I should expect if I go to 32GB or 64GB? Related to this I am using a 32 bit version of Excel. Is there a 64 bit spreadsheet that I can us on a Mac that has no limit on column and row size?
Grant Bennet-Alder,
It’s funny you mentioned using Activity Monitor. I use it all the time to watch when a computation cycle is finished so I can avoid a crash. I keep it up in the corner of my screen while I respond to email or work on a grant. Typically the %CPU will hang at ~100% (sometimes even saying the application is not responding in red) but will almost always complete the cycle if I let it go for 30 minutes or so. As long as I leave Excel alone while it is working it will not crash. I had not thought of using the Activity Monitor as you suggested. Also I did not realize using a 32 bit application limited me to 4GB of memory for each application. That is clearly a problem for this kind of work. Is there any work around for this? It seems like a 64-bit spreadsheet would help. I would love to use the new 64 bit Numbers but the current version limits the number of rows and columns. I tried it out on my MacBook Pro but my files don’t fit.
The hatter,
This may be the solution for me. I’m OK with assembling the unit you described (I’ve even etched my own boards) but feel very bad about needing to step away from Apple products. When I started computing this was the sort of thing computers were designed to do. Is there any native 64-bit spreadsheet that allows unlimited rows/columns, which will run on an Apple? Excel is only 64-bit on their machines.
Many thanks to both of you for your quick and on point answers! -
Auto Launch Application and perform some action
Hello Friends,
I am working on Autoback, want to launch application and perform some action to take backup.
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Query related to excution and performance of count in select statement
Hi,
What are the difference between
select count(1) from table
and
select count(*) from tableThanks for the reply.I searched lots of thread for the same and found that it's same (excution wise and performance wise).
But in few thread i found that someone is saying
"At the time of exceution Count(1) will conevrted internally to count(*) " --- is it correct
"is there any soecial significance of using count(42)" ?
Tx,
Anit
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