I am thinking the proper term for the first column of pg_stat_file() is
"size", not "length".
test=> select * from pg_stat_file('.'); length | atime | mtime | ctime
| isdir--------+------------------------+------------------------+------------------------+------- 512 | 2005-08-13
23:06:38-04| 2005-08-13 23:06:54-04 | 2005-08-13 23:06:54-04 | t(1 row)
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square,
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