From: | Matthew Hagerty <matthew(at)venux(dot)net> |
---|---|
To: | pgsql-interfaces(at)postgreSQL(dot)org |
Subject: | Problems with money fields. |
Date: | 1999-05-19 00:39:41 |
Message-ID: | 4.1.19990518203016.00ae1d00@mail.venux.net |
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Lists: | pgsql-interfaces |
Hello,
I was wondering if someone could shed some light on money fileds for me. I
am having a problem in that a money field plus a null money field equals
null. Try this:
create table test(total money);
insert into test values('');
insert into test valuse(NULL);
select * from test;
total
-----
$0.00
(2 rows)
select '1'::money + total from test;
?column?
--------
$1.00
(2 rows)
Why is the second column blank? This is really throwing my calculations
because there are times when $0.00 is different from no value at all.
Also, how can I get a query of all rows where the money value is NULL?
This fails:
select * from test where total = NULL;
ERROR: parser: parse error at or near "null"
and this gives me the rows with $0.00:
select * from test where total = '';
total
-----
$0.00
(1 row)
If I can't query for a money field with a NULL value, why can I insert one?
Thank you,
Matthew Hagerty
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