SQL Related Articles: Creating an exception in FireBird that sends information to Clarion 2004-03-29 -- Arno Rog Newsgroups: comp.lang.clarion
(with Gemin ODBC, could you please confirm Firebird ODBC?)
Create an exception with the name 'costs_to_much', e.g. 'I'm sorry, there
is not enough money to buy this product'
Create a stored procedure, e.g. SP_CHECK_PRICE to calculate if there is
enough money to buy a certain product, kind of:
IF savings < price_of_product
EXCEPTION costs_to_much;
In your clarion app do the following:
Filename{PROP:SQL} = 'execute SP_CHECK_PRICE'
! And now what it is all about!!!
IF FILEERRORCODE()
MESSAGE(FILEERROR())
END
Above example pops the message 'exception 1. I'm sorry, there is not
enough money to buy this product' on my screen!
Mind you, make sure you read page 165 and further in the DataDef Manual.
In Firebird, when a procedure encounters an exception, it terminates that
particular procedure and undoes any actions performed (directly or
indirectly) by that procedure.
Hope this helps.
Arno Rog
Amsterdam
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