Create local or global variables ?!
hey guys,
I want to use variables instead of wires , which one you suggest , local or global variables? and why ?
thnxxx alot
blue silver wrote:
I want to use variables instead of wires , which one you suggest , local or global variables? and why ?
In LabVIEW, the wire is the variable.
Local and global variables have their limited use in certain UI tasks, but lead to inefficient, error prone, and hard to maintain code.
Local variables create extra data copies in memory, which can be expensive
They break dataflow and thus lead to race conditions.
To "fix" the race conditions, you need to clutter your code with sequences.
... it's an evil cycle!.
Why do you think you need local and global variables?
If you "want" to use them, you are probably misguided. Typically, you should only use them if you "need" to! There are legitimate uses for them.
LabVIEW Champion . Do more with less code and in less time .
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Labview 8.0 PDA local & global variable cause a crash
I've attached a pic of the portion of the VI that causes the PDA
application to crash. What is happening is that I write the initial
resistance0 to a (global or local) of a chip by using a case
structure that sets the value when the while loop first executes,
afterwards, every other iteration, it sets the resitance to a (local or
global variable) called resistance then it plots it.. unfortunately,
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this way causes it to crash .. Any help would be greatly appreciated.
Message Edited by GHernandez on 02-09-2006 06:25 PM
Attachments:
Problems.jpg 162 KBI've re-written this application , where i have not included global
variables for resistance, or resistance0 or the counter. The VI
executes for maybe a min or 2 then crashes giving me the
following error:
App failed. Error code 560331006. Bad input argument to function.
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Message Edited by GHernandez on 02-10-2006 04:51 PM
Message Edited by GHernandez on 02-10-2006 04:52 PM
Attachments:
problema.jpg 158 KB -
Local Variables Versus Global Variables
DATA A TYPE I VALUE 100.
PERFORM PRINT_DATA.
FORM PRINT_DATA.
DATA A(10) TYPE C 'HELLO'.
WRITE / A. "Wanted to Print 100 (Global)
WRITE / A. "Wanted to Print 'HELLO'(Local)
ENDFORM.
Note : Both the times, the Local Variable 'A' is Printed .
?Is there any way to Differentiate the Local and Global Variables When the Names Are Same.*
*It Might be Possible in Object Oriented But I am Looking for the Same in FORMs.Hello Gagan,
You want to print the Global as well as the local values of the variable named "A". Here are a couple of approaches:
1.The 'Subroutines' are part of the modularization techniques. There are certain keywords like "using" & "Changing" so that you can work by passing Values.
2. There is a keyword named "LOCAL". Declare data object with the keyword "LOCAL" and then try the 'write" statement. I suppose this should work for you.
Let me know if any one of the above works or if you need more help.
Best Regards,
Chaitanya -
User Variable in Business Rule or Global Variable
I wanted to call the User Variable value of Planning application under the Globel Variable of Default Value. Example I have created one Globel variable under the Default value the user varible value need to pickup so any thought how I can do this.
I know in the Form if you use &UsrVar this will show the user variable value in the Data form but it is not showing the User Variable value in global variable or inside the Business rule.It is giving an error message there is no substitution variable has been defined. Please explain.
Thanks in Advance,
Irsh
Edited by: 818693 on 17 May, 2011 7:22 AMHi,
User variables are meant to be used in web forms and web forms only. You can certainly pass their values to business rules when you used them in POV or page section of the form during save. All you need to do is to create another business rule (local or global) variable in business rule on the corresponding dimension and use it in your business rule. If you enable running the business rule on save and using the form values for variables options in form properties, business rules would replace the values of business rule variables with the values that are set in user variables.
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Local Vs Global Index on partitioned table?
Hello All,
DESC PS_P1_EMP_QRYSCRTY
Name Null? Type
EMPLID NOT NULL VARCHAR2(11)
EMPL_RCD NOT NULL NUMBER(38)
ROWSECCLASS NOT NULL VARCHAR2(30)
ACCESS_CD CHAR(1)
MY SQL QUERY IS:-
SELECT DISTINCT OPR.OPRID , EMP.EMPLID ,EMP.EMPL_RCD , OPR.CLASSID ,'Y'
FROM PS_SJT_OPR_CLS OPR , PS_P1_EMP_QRYSCRTY EMP
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This query was taking around 15 mins to run at sql-prompt
I have created a partitioned table based on PS_P1_EMP_QRYSCRTY :-
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TABLESPACE PSNEWTAB
PARTITION BY HASH(ROWSECCLASS)
( PARTITION PART1 ,
PARTITION PART2 ,
PARTITION PART3 ,
PARTITION PART4 ,
PARTITION PART5 ,
PARTITION PART6 ,
PARTITION PART7 ,
PARTITION PART8 ,
PARTITION PART9 ,
PARTITION PART10 ,
PARTITION PART11 ,
PARTITION PART12 ,
PARTITION PART13 ,
PARTITION PART14 ,
PARTITION PART15 ,
PARTITION PART16
ENABLE ROW MOVEMENT
AS SELECT * FROM PS_P1_EMP_QRYSCRTY
I created a local index like on PS_P1_EMP_QRYSCRTY_BAK
CREATE INDEX PS_P1_EMP_QRYSCRTY_BAK
ON PS_P1_EMP_QRYSCRTY_BAK(ROWSECCLASS,EMPLID,EMPL_RCD)
TABLESPACE PSINDEX
LOCAL;
The Following is an extract From PS_P1_EMP_QRYSCRTY_BAK
1ST COLUMN =TABLE NAME
2ND COLUMN = PARTITION NAME
3RD COLUMN = NUM OF DISTINCT ROWSECCLASS IN THE PARTITION
4TH COLUMN = NUM OF TOTAL ROWS IN THE PARTITION
TABLE_NAME PARTITION_NAME NUM_OF_DISTINCT_ROWSECCLASS NUM_OF_ROWS
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PS_P1_EMP_QRYSCRTY_BAK | PART2 | 25 | 154537
PS_P1_EMP_QRYSCRTY_BAK | PART3 | 27 | 364219
PS_P1_EMP_QRYSCRTY_BAK | PART4 | 33 | 204528
PS_P1_EMP_QRYSCRTY_BAK | PART5 | 23 | 527974
PS_P1_EMP_QRYSCRTY_BAK | PART6 | 22 | 277210
PS_P1_EMP_QRYSCRTY_BAK | PART7 | 23 | 517125
PS_P1_EMP_QRYSCRTY_BAK | PART8 | 30 | 307634
PS_P1_EMP_QRYSCRTY_BAK | PART9 | 28 | 523169
PS_P1_EMP_QRYSCRTY_BAK | PART10 | 38 | 192565
PS_P1_EMP_QRYSCRTY_BAK | PART11 | 27 | 120062
PS_P1_EMP_QRYSCRTY_BAK | PART12 | 33 | 407829
PS_P1_EMP_QRYSCRTY_BAK | PART13 | 37 | 522349
PS_P1_EMP_QRYSCRTY_BAK | PART14 | 25 | 275991
PS_P1_EMP_QRYSCRTY_BAK | PART15 | 21 | 259676
PS_P1_EMP_QRYSCRTY_BAK | PART16 | 23 | 468071
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FROM PS_SJT_OPR_CLS OPR , PS_P1_EMP_QRYSCRTY_BAK EMP
WHERE EMP.ROWSECCLASS=OPR.CLASSID
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MY PS_P1_EMP_QRYSCRTY_BAK table contains sumwhat 6 million rows...
Now My Questions are:-
1) Is the number of partition done by me optimal under these circumstances...i mean can i get better performance By increasing or decreasing the number of partitions.
2) I created local index on PS_P1_EMP_QRYSCRTY_BAK.
Whether creating local or global index will be more beneficial keeping in mind the where clause and Select clause of the query....
SELECT DISTINCT OPR.OPRID , EMP.EMPLID ,EMP.EMPL_RCD , OPR.CLASSID ,'Y'
FROM PS_SJT_OPR_CLS OPR , PS_P1_EMP_QRYSCRTY_BAK EMP
WHERE EMP.ROWSECCLASS=OPR.CLASSID
i mean in where clause rowsecclass is used thats why i partitioned my table on ROWSECCLASS.
And in select clause i m selecting EMPLID and EMPL_RCD
Thats y i made a local index on ROWSECCLASS,EMPLID ,EMPL_RCD .
Thanks
--Pradeep1) Is the number of partition done by me optimal under these circumstances...i mean can i get better performance >By increasing or decreasing the number of partitions.
2) I created local index on PS_P1_EMP_QRYSCRTY_BAK.
Whether creating local or global index will be more beneficial keeping in mind the where clause and Select clause of >the query....You'll have to see for yourself what is optimal. Every system is different. Here are some ideas, though.
Your query
SELECT DISTINCT OPR.OPRID , EMP.EMPLID ,EMP.EMPL_RCD , OPR.CLASSID ,'Y'
FROM PS_SJT_OPR_CLS OPR , PS_P1_EMP_QRYSCRTY_BAK EMP
WHERE EMP.ROWSECCLASS=OPR.CLASSIDappears to read all qualifying rows across all qualifying partitions. Since you are partitioning by an id that would appear to exclude range and list partitioning instead so the hash partition is probably the best for your application.
Regarding global vs local partitions, I have seen timings indicate that global indexes can improve cross-partition queries slighly. I have not worked with partitions for a while but remember that global partition maintenance is difficult; anything the partition structure changes the global index had to be rebuild. You can check the documentation to see if that has changed.
If possible creating a unique index should give better performance than using an index allowing duplicates. -
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Hi Experts,
I have one BODS job which will load the data from BW to Non SAP. As per my business requirement I have to trigger this job from BW Process chain. For that I have added BODS job in Process Chain Variant and given input to global variable before execute the PC, it was working fine. Now I want to change the Global parameter value for that I open the PC variant it was showing multiple line items and I am not able to run this from Process Chain. Please help me if anybody faces this issue.
Version: BW 7.3
BODS Version : 4.1 SP2
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M RameshHi All,
When you use the process type "Start job in SAP BusinessObjects Data Services" in a process chain , in the variant maintenance there are duplicate entries created in the global variables. This is due to a Internal Program error.
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A question in the CLAD sample exam #2 keeps puzzling me. It's question number 32 about FGVs:
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a. Using Shift Registers to store information
b. Changing the VI’s execution settings to Reentrant
c. Setting the VI to inline into calling VIs
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32.Correct Answer: B
Topic: Functional Global Variables
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Clearly, for an FGV to work properly, the VI must NOT be reentrant. So I would have selected answer B, but the justification seems to clearly point to answer C as well, doesn't it? Is it a typo, a subtlety in the wording? I am stuck on this one!
Solved!
Go to Solution.Well, inlining requires reentrant. Therefore, the best answer should technically be C. This looks like one of those rejected/retired questions since it isn't quite right and/or left up to too much interpretation.
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Global variables in Oracle 8.1.6 on NT
I am running Oracle 8.1.6 on Windows NT.
Does anybody know how can I create and maintain global variables or even constants, so that the same variables and constants could be used by all connections to the database.
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hi!
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Germanohi!
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if there is step by step doc pls send it to my mail id
[email protected]I guess by default (if text is maintained) F4 for calmonth should show you key, short description and long description.
refer: Variable - Name of month instead of Number
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Create Local Variable in Custom.pll
Hi,
I want to create and calling local variable in custom.pll. As i know, we can create local variable with personalization form. but i didn't find the way to create local variable in custom.pll.
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ThanksI think what you want is to create a GLOBAL variable, a LOCAL variable would be available to the Procedure/Function being executed. But to create the local variable, you add it between the Function/Procedure declaration and the begin
PROCEDURE abc(p_input VARCHAR2);
v_count NUMBER := 0;
BEGIN
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BEGIN
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