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Re: CONCAT function adding extra characters - Mailing list pgsql-general

From Pavel Stehule
Subject Re: CONCAT function adding extra characters
Date
Msg-id CAFj8pRD_7ENdgkSZv6ARFUnixMFrp7Y=C2ffEVCwf-M9FyCkzQ@mail.gmail.com
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In response to Re: CONCAT function adding extra characters  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: CONCAT function adding extra characters  (AI Rumman <rummandba@gmail.com>)
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út 15. 6. 2021 v 21:07 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
AI Rumman <rummandba@gmail.com> writes:
> I am using Postgresql 10 and seeing a strange behavior in CONCAT function
> when I am concatenating double precision and int with a separator.

> select concat('41.1'::double precision,':', 20);
>> Result:
>> 41.1000000000000014:20

What have you got extra_float_digits set to?


postgres=# set extra_float_digits to 3;
SET
postgres=# select concat('41.1'::double precision,':', 20);
┌────────────────────────┐
│         concat         │
╞════════════════════════╡
│ 41.1000000000000014:20 │
└────────────────────────┘
(1 row)

Pavel

 
                        regards, tom lane


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