I was just wondering why the btrim syntax that takes only a single
argument is not documented in 9.4 in the documentation (I checked both
7.4 and 8.0 docs).
This is in a 7.4.5 installation:
pg=# \df btrim
List of functions
Result data type | Schema | Name | Argument data types
------------------+------------+-------+---------------------
bytea | pg_catalog | btrim | bytea, bytea
text | pg_catalog | btrim | text
text | pg_catalog | btrim | text, text
(3 rows)
Is it ever documented anywhere that the single-argument version of
btrim can be used to remove whitespace from the left and right of a
given string? Is this version not supposed to be user-facing for some
reason?
Also, in this post:
http://archives.postgresql.org/pgsql-sql/2002-01/msg00053.php
Bruce sort of explains that TRIM is an ANSI word but doesn't fully
explain why it doesn't show up in a \df listing:
pg=# \df trim
List of functions
Result data type | Schema | Name | Argument data types
------------------+--------+------+---------------------
(0 rows)
This one's more a curiosity thing.
-tfo
--
Thomas F. O'Connell
Co-Founder, Information Architect
Sitening, LLC
http://www.sitening.com/
110 30th Avenue North, Suite 6
Nashville, TN 37203-6320
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