bytea_ouput = escape vs encode(byte, 'escape')

Jim Nasby-2 wrote

I'm wondering why bytes_output = escape produces different output than
encode(byte, 'escape') does. Is this intentional? If so, why?

cnuapp_prod@postgres=# select e'\r'::bytea AS cr, e'\n'::bytea AS lf;
cr | lf
------+------
\x0d | \x0a
(1 row)

cnuapp_prod@postgres=# set bytea_output = escape;
SET
cnuapp_prod@postgres=# select e'\r'::bytea AS cr, e'\n'::bytea AS lf;
cr | lf
------+------
\015 | \012
(1 row)

cnuapp_prod@postgres=# select encode(e'\r'::bytea,'escape') AS cr,
encode(e'\n'::bytea, 'escape') AS lf;
cr | lf
----+----
\r | +
|
(1 row)

cnuapp_prod@postgres=#

encode takes a bytea and provides what it would be as a text (using the
specified encoding to perform the conversion).

the "bytea" output examples are simple output of the contents of the
byte-array without an supposition as to what those bytes represent. It is
strictly a serialization format and not an encoding/decoding of the
contents.

In this example the two "functions" are acting as paired input/output.

I'm thinking the direction you are assuming from the word "encode" is
confusing you - as it did me at first.

David J.

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