Re: BUG #10201: Invalid input accepted with IN expression

Hi,

On 2014-05-02 20:01:27 +0000, dbaston(at)gmail(dot)com wrote:
> If two items in an IN expression are separated by a newline instead of a
> comma, those items will be ignored with no error.
>
> CREATE TABLE testing (id varchar(1));
> INSERT INTO testing VALUES ('1'), ('2'), ('3'), ('4'), ('5');
>
> -- Missing comma produces a syntax error
> SELECT * FROM testing WHERE id IN ('1' '2', '3');
>
> -- Unless there is a newline
> SELECT * FROM testing WHERE id IN ('1'
> '2', '3');

Check what
SELECT '1'
'2';
returns. Two string constants separated by a newline are essentially
concatenated. So, what the above means is: id IN ('12', '3')

Check:
http://www.postgresql.org/docs/current/interactive/sql-syntax-lexical.html#SQL-SYNTAX-CONSTANTS

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
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