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Is there a way to ALIAS a CA the same as its VFP table?
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To
05/12/2006 11:38:49
General information
Forum:
Visual FoxPro
Category:
Client/server
Environment versions
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP1
Database:
Visual FoxPro
Miscellaneous
Thread ID:
01174105
Message ID:
01174963
Views:
11
>The question is incorrect for me.
>Use of Alias into the "SELECT..FROM Alias" is not a NATIVE ( storage ) datasource, but a access to runtime application data, then :
>- it don't require a conversion to others backend,
>- the cursor must exist.
>
>If you want to use a true table with an alias, then you have to define the DBF filename somewhere, and 3 data levels are necessary:
>
>CA.Alias,CA.tables,TablesFilename
>
>CA baseclass support 2 levels only CA.Alias,CA.tables, then you have to define a CA subclass
>with this enhancement. It is simple
>( put TablesFilename into the Datasource properties ...)
>a trace:
>
>dataSource = "MyNatoveVFPTable1 SomeAliasThatCAWillExpect1,MyNatoveVFPTable2 ..."
>
>procedure dataSource_Assign(ds)
>
>CEx.CursorFill
>IF this.d..type=="NATIVE"
>  FOR k=1 to ALINES(ta,this.datasource,",")
>     USE GETWORDNUM(ta[m.k],1) AGAIN IN 0 ALIAS GETWORDNUM(ta[m.k],2)
>  NEXT
>ENDIF
>
Totally agree with you.
That's why I said that using a table BEFORE issue of CursorFill() method is not the way you must go hwne you want to convert the application to other backend. Just use another DataSourceType, not NATIVE (and becuase this is VFP9 I suppose you only could use ADO).
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.
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