On Mon, Mar 13, 2017 at 7:51 AM, vod vos <vodvos@zoho.com> wrote:
Sorry for taking varchar(4) as an example, What I want urgently is how to make a constraint of fixed length of a numeric data, that you can only input data like 23.45, and if you input the data like 2.45, 23.4356, 233.45, you will get a warning message from postgresql.
I think expr will do the job, but are there any simpler ways to do it in postgresql?
Requiring a fixed length, and not an amount range is unusual. That the only way to do it is to consider the input as text and use a regular expression is understandable.
