public inbox for [email protected]  

help / color / mirror / Atom feed

From: Tom Lane <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: Re: Documentation for numeric/decimal type does not say that precision can be specified without scale
Date: Sun, 11 Mar 2018 14:04:23 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

=?utf-8?q?PG_Doc_comments_form?= <[email protected]> writes:
> The documentation for the numeric/decimal type does not say that the
> precision parameter can be specified without specifying a scale, e.g.
> numeric(10) is valid.

Where are you looking exactly?  What I see under 8.1.2 is

    Both the maximum precision and the maximum scale of a numeric column
    can be configured. To declare a column of type numeric use the syntax:
    
        NUMERIC(precision, scale)

    The precision must be positive, the scale zero or
    positive. Alternatively:
    
        NUMERIC(precision)

    selects a scale of 0. Specifying:
    
        NUMERIC

    without any precision or scale creates a column in which numeric
    values of any precision and scale can be stored, up to the
    implementation limit on precision. A column of this kind will not
    coerce input values to any particular scale, whereas numeric columns
    with a declared scale will coerce input values to that scale. (The SQL
    standard requires a default scale of 0, i.e., coercion to integer
    precision. We find this a bit useless. If you're concerned about
    portability, always specify the precision and scale explicitly.)


			regards, tom lane

view thread (2+ messages)

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: Documentation for numeric/decimal type does not say that precision can be specified without scale
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox