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CONCAT function adding extra characters - Mailing list pgsql-general

From AI Rumman
Subject CONCAT function adding extra characters
Date
Msg-id CAGoODpdy0zyMbsOCb5n78yM4v2UvWeb2GT9WyCnH1YtSxkcYZA@mail.gmail.com
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Responses Re: CONCAT function adding extra characters  (Pavel Stehule <pavel.stehule@gmail.com>)
Re: CONCAT function adding extra characters  (Adrian Klaver <adrian.klaver@aklaver.com>)
Re: CONCAT function adding extra characters  (Adrian Klaver <adrian.klaver@aklaver.com>)
Re: CONCAT function adding extra characters  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: CONCAT function adding extra characters  (Ron <ronljohnsonjr@gmail.com>)
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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

Value 41.1 which double precision converts to 41.1000000014.

Is that expected?

Thanks.

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