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| EVAL with If Condition |
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| kirankinnu |
 Posted: Fri Jan 22, 2010 8:17 am Post subject: EVAL with If Condition |
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Centurion
Joined: 12 Jun 2004
Posts: 128
Location: Chicago, IL
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Hi Folks,
I am having some coding difficulty. Maybe someone could point out how to handle this.
We have a dynamic Condition that keeps changing. I should evaluate the condition and return If its true or false. I am using EVAL for this. So here is am example
SET X = '(A>B)'
SET R = EVAL(X);
The above EVAL Should return TRUE if A>B or else return FALSE. A, B are dynamic XPATH's and will keep changing. The Condition also will change, Like we can expect A<B or A=B..
We are getting 'Error Evaluating Expression' When I use the above logic. Can we use EVAL function or Statement of IF condition.
How can we handle the above scenario. I would appreciate any solution or workaround.
Thank you,
Kiran |
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| broker_new |
| Posted: Fri Jan 22, 2010 8:56 am Post subject: |
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Yatiri
Joined: 30 Nov 2006
Posts: 614
Location: Washington DC
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I am not 100 % sure but try using "{" "}" for dynamically changing fields and see what happens.
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IBM ->Let's build a smarter planet |
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| kirankinnu |
| Posted: Fri Jan 22, 2010 9:00 am Post subject: |
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Centurion
Joined: 12 Jun 2004
Posts: 128
Location: Chicago, IL
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| No use with using { }..It gives a Syntax Error while Evaluating the expression |
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| mgk |
| Posted: Fri Jan 22, 2010 9:56 am Post subject: |
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Padawan
Joined: 31 Jul 2003
Posts: 1642
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Can you provide an actual example of the ESQL you are using that fails, along with an example of the dynamic expression you are using?
Note that the EVAL function can only eval expressions, while the EVAL statement can only eval statements. As IF is a statement, you need to use the EVAL statement to eval an IF
Regards,
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MGK
The postings I make on this site are my own and don't necessarily represent IBM's positions, strategies or opinions. |
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| kirankinnu |
| Posted: Fri Jan 22, 2010 11:16 am Post subject: |
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Centurion
Joined: 12 Jun 2004
Posts: 128
Location: Chicago, IL
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The EVAL statement did the trick. I was using EVAL as function and was getting errors while executing.
Thank you for the Support
Regards,
Kiran |
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