Обсуждение: pgsql: doc: show how interval's 3 unit buckets behave using EXTRACT()

doc:  show how interval's 3 unit buckets behave using EXTRACT()

This clarifies when justify_days() and justify_hours() are useful.
Paragraph moved too.

Reported-by: vodevsh@gmail.com

Discussion: https://postgr.es/m/152698651482.26744.15456677499485530703@wrigleys.postgresql.org

Backpatch-through: 9.3

Branch
------
REL_10_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/c1975c1af7c2120277c57b1f40996b5d94cf22f6

Modified Files
--------------
doc/src/sgml/datatype.sgml | 40 +++++++++++++++++++++++++++-------------
1 file changed, 27 insertions(+), 13 deletions(-)