BUG #15529: interval max value '178000000 years' in doc is not exact. It should 178956970.

The following bug has been logged on the website:

Bug reference: 15529
Logged by: wang yakun
Email address: 369358123@qq.com
PostgreSQL version: 11.0
Operating system: Linux
Description:

you wrote:

interval:
Low Value: -178000000 years
High Value: 178000000 years

in 'Table 8.9. Date/Time Types' in postgresql 11 documention.
However, I can execute this sql:

postgres=# select interval '178000001' year;
interval
-----------------
178000001 years
(1 row)

In other words, max value is not 178000000.
****************************************************
I test the exact value is 178956970:

postgres=# select interval '178956970' year;
interval
-----------------
178956970 years
(1 row)

postgres=# select interval '178956971' year;
ERROR: interval out of range
LINE 1: select interval '178956971' year;
^
So, you should wrote 178956970 in postgresql 11 documention.