sql - PostgreSQL: How to return roman date with single space delimitation elegantly? -


if use standard way receive date roman-numeric months ...

select to_char(date '2000 12 05', 'dd rm yyyy')

postgresql returns multi-spaced (1 4) delimited dates:

"05 xii  2000" "02 viii 1976" "02 v    1976"

i notice rm returns 5 characters possibilities of month (from small: i big: viii)

this not expected. want single-spaced delimited dates returned. came solution using regex_replace might overkill (?)

select regexp_replace(to_char(date '2000 12 05', 'dd rm yyyy'),                      '(\d+)\s+([ivx]+)\s+(\d+)',e'\\1 \\2 \\3','g');

which returns single-spaced date results:

"05 xii 2000" "02 viii 1976" "02 v 1976"

is there more elegant way this? (...or post bug in postgresql?)

simply add fm:

fm suppresses leading zeroes , trailing blanks otherwise added make output of pattern fixed-width.

select to_char(date '2000 01 05', 'dd fmrm yyyy'); -- 05 2000

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