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author | Tom Lane <tgl@sss.pgh.pa.us> | 2016-11-30 13:34:14 -0500 |
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committer | Tom Lane <tgl@sss.pgh.pa.us> | 2016-11-30 13:34:14 -0500 |
commit | dd3edfe630fecd561568455a2c47ec5858a95e8c (patch) | |
tree | 83d219e56a165d7a4a50e3a58afee6296dfaaf77 /src | |
parent | e5b8aa636a63a9446e244fcc8d3a262e3e14049a (diff) | |
download | postgresql-dd3edfe630fecd561568455a2c47ec5858a95e8c.tar.gz postgresql-dd3edfe630fecd561568455a2c47ec5858a95e8c.zip |
Doc: improve description of trim() and related functions.
Per bug #14441 from Mark Pether, the documentation could be misread,
mainly because some of the examples failed to show what happens with
a multicharacter "characters to trim" string. Also, while the text
description in most of these entries was fairly clear that the
"characters" argument is a set of characters not a substring to match,
some of them used variant wording that was a bit less clear.
trim() itself suffered from both deficiencies and was thus pretty
misinterpretable.
Also fix failure to explain which of LEADING/TRAILING/BOTH is the
default.
Discussion: https://postgr.es/m/20161130011710.6539.53657@wrigleys.postgresql.org
Diffstat (limited to 'src')
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