Re: List of encodings

On 4/19/26 5:19 PM, Igor Korot wrote:
> Hi, Adrian,
>
> On Sun, Apr 19, 2026 at 4:21 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:

>>> What I noticed is that all encodings are default, as they all have 't'
>>> in the last column.
>>>
>>> It's a little confusing...
>>
>> Not if you read the docs:
>>
>> https://www.postgresql.org/docs/current/catalog-pg-conversion.html
>>
>> "The catalog pg_conversion describes encoding conversion functions. See
>> CREATE CONVERSION for more information."
>>
>> https://www.postgresql.org/docs/current/sql-createconversion.html
>>
>> "Conversions that are marked DEFAULT can be used for automatic encoding
>> conversion between client and server. To support that usage, two
>> conversions, from encoding A to B and from encoding B to A, must be
>> defined."
>
> From the https://www.postgresql.org/docs/current/catalog-pg-conversion.html:
>
> [quote]
>
> condefault bool
>
> True if this is the default conversion
> [/quote]
>
> So, what info do I trust?

Both.

In your setup all the installed encoding conversion functions are also
the default for those conversions. It is possible to create/install a
conversion function that is not the default.

>
> Thank you.
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com