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Parameterized Views
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Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00296038
Message ID:
00296244
Views:
22
>>>Hello everyone,
>>>I would like to know how to pass a parameter to a view's "where" clause for conditions. For example, in different areas I may have different "where" clause conditions. In one instance, I may have "cField1 = 'x'" and in another instance "cField2 = 'y' .AND. !empty(cField1)". Is this possible? I had attempted the following but it did not work: "create sql view test as select * from myTable where ?x"
>>>then before issuing the "use test" I assigned x="cField1 = 'x'". I would appreciate any suggestions.
>>
>>Others have responded to this question and I agree with all of them.
>>
>>You could use an open clause
>>
>>cExpr = "cField1 = 'x'"
>>
>>CREATE SQL VIEW "My_view" ;
>> AS SELECT field_list from my_table ;
>> where &cExpr
>>
>>This may blow up in your face though. Not having defined cExpr and trying to use the view in a form will error, all the time.
>>
>
>Except that &cExpr will be evaluated at the time that the CREATE SQL VIEW is executed, so there is no advantage, and in fact, won't be anything like what he wants...
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