Hi Sieghard,
Many thanks for your answer . In fact , the fields decimal(x,y) or
numeric (x,y) must have a x>8 . After the changes field.type is ftbcd and
it's that what I expected .
You know that using TMSEIBCONNECTION instead tfb3connection resolves the
problem also, but is it safe to use it with Firebird 3 server?
Med.
________________________________
De : Sieghard <[email protected]>
Envoyé : vendredi 8 novembre 2019 22:18
À : [email protected]
<[email protected]>
Objet : Re: [MSEide-MSEgui-talk] Field Mapping
Hello mohamed,
you wrote on Tue, 5 Nov 2019 18:54:38 +0000:
> Firebird field NUMERIC(8,2) is mapped automatically as integer in
> MSEGUI? What is the correct mapping
8.2 looks somewhat like a currency designation, a 10 digit real value with
2 decimal places. Scaled by 100 it fits comfortably into a 32 bit integer
value without any loss of precision, as a 32 bit "single" would suffer from.
Maybe the fpc "currency" type might do? This is an integer type (64 bit),
that's internally mapped to represent a number scaled by 1/10000, which
amounts to 4 decimal places and around 15 integer digits, i.e. 19 valid
digits altogether. A bit of overkill, but this type is "natively" supported
by fpc, when you would have to create a full set of operators yourself if
you wanted to use a specifically taylored type of your own.
> I am using FB3 connection.
Isn't such a declaration usually a parametrized type? I.e, you could just
as well declare a field type being NUMERIC(12.3) oder NUMERIC(5.1), or any
other fixed point size? Fixed point means a constant-power-of-10 scaling as
specified by the number of decimal places. This can easily be represented
by an integer of sufficient size, requiring only a simple transformation
for retrieval, storing and multiplication type operations, as well as for
external representation (displaying or printing).
I hope this can be of some help.
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Mit freundlichen Grüßen, S. Schicktanz
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