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* Documentation for numeric/decimal type does not say that precision can be specified without scale
@ 2018-03-11 17:58 PG Doc comments form <[email protected]>
0 siblings, 1 reply; 2+ messages in thread
From: PG Doc comments form @ 2018-03-11 17:58 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/10/static/datatype.html
Description:
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.
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* Re: Documentation for numeric/decimal type does not say that precision can be specified without scale
@ 2018-03-11 18:04 Tom Lane <[email protected]>
parent: PG Doc comments form <[email protected]>
0 siblings, 0 replies; 2+ messages in thread
From: Tom Lane @ 2018-03-11 18:04 UTC (permalink / raw)
To: [email protected]; +Cc: [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
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2018-03-11 17:58 Documentation for numeric/decimal type does not say that precision can be specified without scale PG Doc comments form <[email protected]>
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