PG Doc comments form <noreply@postgresql.org> writes:
> QUOTE:
> The CAST() syntax conforms to SQL. The type 'string' syntax is a
> generalization of the standard: SQL specifies this syntax only for a few
> data types, but PostgreSQL allows it for all types. The syntax with :: is
> historical PostgreSQL usage, as is the function-call syntax.
> UNQUOTE
> In fact, this is not 100% true. TIMESTAMP 'string' does not work this way.
Looks like it works to me:
regression=# select timestamp '2019-04-09 11:49';
timestamp
---------------------
2019-04-09 11:49:00
(1 row)
If you feel that the documentation is unclear, you need to be clearer
about how it's unclear ;-)
(Reading between the lines of this complaint and your adjacent one,
I kind of suspect that you were trying to use "TIMESTAMP something"
where the something wasn't a literal string constant. But surely
4.1.2.7 makes it plain that the discussed syntax is for constants.
You might need to read 4.2.9 "Type Casts" instead.)
regards, tom lane