BUG #14486: Inserting and selecting interval have different constraints

The following bug has been logged on the website:

Bug reference: 14486
Logged by: Per Modin
Email address: web+postgresql(at)modin(dot)io
PostgreSQL version: 9.6.1
Operating system: Linux 303a92173594 4.8.15-moby #1 SMP Sat Dec 17 0
Description:

Found this bug in 9.4.8, tried it in docker towards psql 9.6.1 and it's in
there as well. A minimum working example would be as follows:

```
postgres=# CREATE TABLE tbl AS SELECT 9223372036854 * interval '1 second'
col; TABLE tbl;
SELECT 1
ERROR: interval out of range
```

```
postgres=# SELECT count(*) FROM tbl;
count
-------
1
(1 row)
```

It seems that inserting and retrieving data have different constraints. As
you
can see from query 2, the data still gets inserted.

```
postgres=# select version();
version
------------------------------------------------------------------------------------------
PostgreSQL 9.6.1 on x86_64-pc-linux-gnu, compiled by gcc (Debian 4.9.2-10)
4.9.2, 64-bit
(1 row)
```

Best regards,
Per Modin