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| Vamsi Krishna |
 Posted: Tue Mar 17, 2015 9:10 pm Post subject: Calling Database table values Dynamically |
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Acolyte
Joined: 12 May 2014
Posts: 53
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Hi All,
I am working on a task to retrieve table values from sql server database for exchange rates. I am using select statement by using select.* iam able to retrieve the values but the modification i received is if the client needs only one column values from 9 columns i have to call the values dynamically from database. I have tried using select variable the variable is having the column name but the select statement printing the column name all times into the Environment. Anyone help me how to execute this statement  |
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| ganesh |
| Posted: Wed Mar 18, 2015 8:09 am Post subject: |
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Master
Joined: 18 Jul 2010
Posts: 294
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Is your requirement create sql query dynamically based on the input?
Create stored procs for all possible combinations and call them based on the request. |
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| fjb_saper |
| Posted: Wed Mar 18, 2015 8:25 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20767
Location: LI,NY
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You could potentially use EVALUATE... but it comes with a performance cost... 
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MQ & Broker admin |
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| Vamsi Krishna |
| Posted: Wed Mar 18, 2015 6:55 pm Post subject: |
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Acolyte
Joined: 12 May 2014
Posts: 53
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| ganesh wrote: |
Is your requirement create sql query dynamically based on the input?
Create stored procs for all possible combinations and call them based on the request. |
Yes my requirement is calling the sql query dynamically ok i will try with the stored procedures |
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| Vamsi Krishna |
| Posted: Thu Mar 19, 2015 6:38 pm Post subject: |
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Acolyte
Joined: 12 May 2014
Posts: 53
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| Vamsi Krishna wrote: |
| ganesh wrote: |
Is your requirement create sql query dynamically based on the input?
Create stored procs for all possible combinations and call them based on the request. |
Yes my requirement is calling the sql query dynamically ok i will try with the stored procedures |
I am able to retrieve data from database i had used some conditional statements in esql and iam able to receive data from the database. |
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| mgk |
| Posted: Fri Mar 20, 2015 10:52 am Post subject: |
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Padawan
Joined: 31 Jul 2003
Posts: 1647
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You may find that PASSTHRU helps with this as it allows you to construct queries to send to the DB dynamically. And the performance is the same as regular ESQL queries (assuming you use parameter markers) and is much better than EVAL.
Kind regards,
_________________
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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| Vamsi Krishna |
| Posted: Mon Mar 23, 2015 12:48 am Post subject: |
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Acolyte
Joined: 12 May 2014
Posts: 53
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| mgk wrote: |
You may find that PASSTHRU helps with this as it allows you to construct queries to send to the DB dynamically. And the performance is the same as regular ESQL queries (assuming you use parameter markers) and is much better than EVAL.
Kind regards, |
Thanks mgk i will check with the PASSTHRU statement |
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