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* decimal digits precision for real and double precision types
@ 2018-07-17 19:15 PG Doc comments form <[email protected]>
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From: PG Doc comments form @ 2018-07-17 19:15 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-numeric.html
Description:
In table 8.2 for numeric types, when the documentation states "6 decimal
digits precision" for the real type, we are talking about 6 digits after the
decimal point or 6 digits in total (before and after)?
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: decimal digits precision for real and double precision types
@ 2018-08-07 22:54 Bruce Momjian <[email protected]>
parent: PG Doc comments form <[email protected]>
0 siblings, 0 replies; 2+ messages in thread
From: Bruce Momjian @ 2018-08-07 22:54 UTC (permalink / raw)
To: [email protected]; [email protected]
On Tue, Jul 17, 2018 at 07:15:41PM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/10/static/datatype-numeric.html
> Description:
>
> In table 8.2 for numeric types, when the documentation states "6 decimal
> digits precision" for the real type, we are talking about 6 digits after the
> decimal point or 6 digits in total (before and after)?
Well the number is stored as a mantissa and exponent, so it is 6
mantissa digits plus an exponent from 1E-37 to 1E+37.
--
Bruce Momjian <[email protected]> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Ancient Roman grave inscription +
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