Thank you JoshyFun! The problem remain. Now i can't apply any filter to Invoices fields! :(
For example this query raise an exception: "SELECT Invoices.*, Customers.Name FROM Customers RIGHT JOIN Invoices ON Invoices.CustomerID= Customers.ID * WHERE Invoices.Number > 3"* 2010/1/12 JoshyFun <joshy...@gmail.com> > Hello Lazarus-List, > > Tuesday, January 12, 2010, 6:07:37 PM, you wrote: > > MF> I got an *sql logic error* trying to execute following query using Zeos > MF> Component (ZQuery): > MF> "SELECT Invoices.*, Customers.Name > MF> FROM Invoices > MF> LEFT JOIN Customers > MF> ON Invoices.CustomerID= Customers.ID > MF> * WHERE Customers.Name = 'Tom' "* > MF> excluding the Where clause make the query run without problems. > > >From my point of view it is a "SQL logic error", I think it should be: > > "SELECT Invoices.*, Customers.Name > FROM Customers > RIGHT JOIN Invoices > ON Invoices.CustomerID= Customers.ID > WHERE Customers.Name = 'Tom' " > > Note the swapping of Customers and Invoices, the other way the SQL > engine will sequentially scan all invoices to join them with customer > and perform the "where". Anyway I do not know why ZQuery raises and > exception :-? (I'm not using Zeos at all). > > -- > Best regards, > JoshyFun > > > -- > _______________________________________________ > Lazarus mailing list > Lazarus@lists.lazarus.freepascal.org > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus >
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