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Version 9.3 / Query Business Object using IN (@Parameter)

Posted Apr 03 by Pierre Ballon.



I'm populationg a grid with the following bo/Query:



FROM Company, People




left(Company.CP,2) IN (@memDpts).


The local variable memDpts is a memo populated using a List field on the form and is bound with @memDpts.

This work fine only if @memDpts is a single value ("65" for example).

What syntax, type ,…  should I use to make it work with a list (really using the IN), I tried many things (add quotes , commas, double quotes,…), but I can't fix it.

Thanks for help.



2 Answers

BEST ANSWER: As chosen by the author.

I never got IN clauses to work well when the are in put parameters.  (They work fine for constants or in-line code.)


The only way I've sort of gotten around this is to wrap the whole SQL inside an EXEC where so the string can use + to build up the entire query as desired.  I've not gotten that to work very well very often, and I seem to lose the ability to use it on grids as the fields are no longer "available".  (Or I'm doing something wrong, which is quite possible.)


I believe Jerome has suggested elsewhere (here and/or his web site) to insert the keys / folders / values into a temporary table and join or used that table in your IN clause for your list.  (Actually this may resolve similar issues I've not looped back to yet …)

BEST ANSWER: As chosen by the author.



Take a look at the dbo.pudf_stringlist_to_table function that ships with MBPM:


… AND LEFT(Company.CP, 2) IN (SELECT Item FROM dbo.pudf_stringlist_to_table(@memDpts, ','))


Assuming that @memDpts is a comma separated list of companies.


Hope this helps,



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