doc: interval spill method for units greater than months

Bruce Momjian <bruce@momjian.us>

Commit: 1dd84002060cc2cdc20b6cebd0f6bb2b56c7b35b
Author: Bruce Momjian <bruce@momjian.us>
Date: 2021-08-03T16:17:58Z
Releases: 13.4
doc:  interval spill method for units greater than months

Units are _truncated_ to months, but only in back branches since the
recent commit.

Reported-by: Bryn Llewellyn

Discussion: https://postgr.es/m/BDAE4B56-3337-45A2-AC8A-30593849D6C0@yugabyte.com

Backpatch-through: 9.6 to 14

Files

PathChange+/−
doc/src/sgml/datatype.sgml modified +14 −11

Documentation touched