On 21 December 2017 at 14:43, Rajkumar Raghuwanshi <
[email protected]> wrote:
> Hi,
>
> with below query I am getting unexpected output. here !<space>= is
> behaving as =
> is this expected behaviour?
>
> postgres=# create table tbl (col_a int, col_b int);
> CREATE TABLE
> postgres=# insert into tbl values (1,2);
> INSERT 0 1
> postgres=# insert into tbl values (2,1);
> INSERT 0 1
>
>
>
>
> *postgres=# select * from tbl where col_a ! = 1; col_a |
> col_b-------+------- 1 | 2(1 row)*
>
>
One-factorial is one, so it's correct.
test=> SELECT 1!, 2!, 3!;
?column? | ?column? | ?column?
----------+----------+----------
1 | 2 | 6
(1 row)
test=> SELECT (1 !) = 1;
?column?
----------
t
(1 row)
test=> \do+ !
List of operators
Schema | Name | Left arg type | Right arg type | Result type |
Function | Description
------------+------+---------------+----------------+-------------+-------------+-------------
pg_catalog | ! | bigint | | numeric |
numeric_fac | factorial
(1 row)
--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
