From: Timo Roessner <timo.roessner@gmx.net>
To: pgsql-sql@postgresql.org
Subject: datatype conversion on postgresql 7.4.1
Date: Sun, 22 May 2005 13:29:10 +0200
Message-ID: <42906D06.3090200@gmx.net> (raw)
hi everybody,
i got the following problem:
i have a database running on a postgresqlserver version 7.4.1, in the
database is a table with 4 columns containing
float-numbers. what i want to do now is, to convert the type of those
columns from float to numeric, because
i want to limit the positions after the decimal point to 2.
what works fine in v. 8:
either
alter table fragment alter column x type numeric(15,2)
or
update fragment set x = round(x,2)
but both wont work with version 7.4.1!
when i look into the documentation it seems to say that in 7.4.1 round()
can only round to a given number of positions after the decimal point
when used with a numeric type, but not with floats!
and if i try something like:
alter table fragment alter column x type numeric(15,2)
i get an syntax error, so this seems to be no feature in 7.4.1 (didnt
find anything like that in the docs too....)
what can i do to solve this? there must be some way in postgresql 7.4.1,
if there is no way to do that, i have to
build up the whole database from scratch........there must be a way to
convert float to numeric values in 7.4.1 ,
but i dont have a single clue...
thx for any help in advance
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To: pgsql-sql@postgresql.org
Cc: timo.roessner@gmx.net
Subject: Re: datatype conversion on postgresql 7.4.1
In-Reply-To: <42906D06.3090200@gmx.net>
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