Обсуждение: query parsing bug?

known behavior or bug?

  fr=# select count(*) from foo where foo_id!=-1;
  ERROR:  Unable to identify an operator '!=-' for types 'int4' and
'int4'
          You will have to retype this query using an explicit cast

  fr=# select count(*) from foo where foo_id!= -1;
  ...
  (1 row)


Notice the space (or lack thereof) between != and -1.  It only seems to
happen with != and a negative number.


  fr=# select count(*) from foo where foo_id=-1;
  ...
  (1 row)

  fr=# select count(*) from foo where foo_id!=1;
  ...
  (1 row)


This is with 7.1.3, via psql.  I haven't tried the query via another
interface (ie, JDBC).

eric

ps, wonder if I should be using <> instead of !=

"Eric Ridge" <ebr@tcdi.com> writes:
> ps, wonder if I should be using <> instead of !=

Yup.

See the fine print at
http://www.ca.postgresql.org/users-lounge/docs/7.1/postgres/sql-syntax.html#SQL-SYNTAX-OPERATORS

            regards, tom lane