Re: Mapping Java BigDecimal

Ok I finally see what you are getting at.
However I personally think that PostgreSQL is more correct.

In Oracle (excuse the format if this type-cast is not valid in Oracle - I've
never used Oracle)
SELECT '3'::number(6,2)
3

In PostgreSQL
SELECT '3'::numeric(6,2);
3.00

In Java
test = new BigDecimal("3").setScale(2);
System.out.println(test.toPlainString());
3.00

If you have set a scale in PostgreSQL you will always get that number of
decimal points and therefore your result from the database will always be
consistent and therefore predictable.
I would not want a database that returned data in any other way, just my
opinion of course.

Donald

----- Original Message -----
From: "dmp" <danap@ttc-cmc.net>
To: <pgsql-jdbc@postgresql.org>
Sent: Wednesday, January 20, 2010 4:27 AM
Subject: Re: [JDBC] Mapping Java BigDecimal


>> I would like to disagree with the statement that PostgreSQL
>> numeric is a real with rounding to the precision specified.
>
>
> I concede my mis-statement.
>
>> Hi All,
>>
>> We decide add support PostgreSQL database (now supporting only Oracle
>> database) to our product.
>>
>> In Oracle we mapping Java BigDecimal to number(19, 2), in PostgreSQL to
>> numeric(19, 2).
>>
>> If I store to "BigDecimal column" number without decimal, e.g. "3", than
>> Oracle JDBC driver return "3", but PostgreSQL JDBC driver return "3.00".
>>
>> Is there some way (mapping, server setup, jdbc driver setup,...) how
>> reach return number without trailing zeroes on decimal position?
>>
>> I'm using JDBC4 PostgreSQL Driver (v. 8.4-701) and PostgreSQL v. 8.1.18
>> (default for CentoOS 5.3).
>> Thank you all
>
>
> Oracle NUMBER(19,2), (precision,scale) is just the same as NUMERIC(19,2),
> but if do
>
> Oracle NUMBER(19,2) ----> PostgreSQL Numeric, no precision yields the
> desired result
> as Jakub has figured out and keeps whatever precision input.
>
> danap.
>
>
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