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List:       postgresql-general
Subject:    Re: varchar::bytea fails when varchar contains backslash
From:       "Daniel Verite" <daniel () manitou-mail ! org>
Date:       2022-02-21 10:59:55
Message-ID: 87c8627f-677a-45f7-b577-533df086377c () manitou-mail ! org
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	Matthias Apitz wrote:

> I wanted to look into a column of type varchar converting the content
> with ::bytea to a hex string, but this fails when the column contains a
> backslash:

Yes, casting from text to bytea cannot be used for that.
The convert_to() function must be used instead.

From the doc at
https://www.postgresql.org/docs/current/functions-binarystring.html

convert_to ( string text, dest_encoding name ) → bytea

Converts a text string (in the database encoding) to a binary string encoded
in encoding dest_encoding (see Section 24.3.4 for available conversions).

convert_to('some_text', 'UTF8') → \x736f6d655f74657874



Best regards,
-- 
Daniel Vérité
PostgreSQL-powered mailer: https://www.manitou-mail.org
Twitter: @DanielVerite


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