On 10/23/19 10:42 AM, Ravi Krishna wrote:
> We noticed this bug in Redshift. It then occurred to me that this may
> very well be a PG bug since Redshift is based on PG.
>
> Reproduced it in Version 11.5
>
> create table bugtest (fld1 char(1)) ;
>
> insert into bugtest values('a');
> insert into bugtest values('b');
> insert into bugtest values('c');
> insert into bugtest values('d');
> insert into bugtest values('e');
>
> select count(*) from bugtest where fld1 in ('a','b','c',
> 'd','e'); -> produces 5 as output.
> So far so good.
>
> Now check this:
>
> select count(*) from bugtest where fld1 in ('a','b','c'
> 'd','e');
>
> Note the missing comma after 'c'.
>
> PG takes it a syntactically right SQL and gives 3 as output.
>
> In SQLServer it errors out SQL Error [102] [S0001]: Incorrect syntax near 'd'.
>
> Can't believe this bug was never found before. We ended up wasting lot of time to figure this out.
Confirmed in 9.6.
postgres@haggis:~$ psql
psql (9.6.15)
Type "help" for help.
postgres=# create table bugtest (fld1 char(1)) ;
CREATE TABLE
postgres=#
postgres=# insert into bugtest values('a');
INSERT 0 1
postgres=# insert into bugtest values('b');
INSERT 0 1
postgres=# insert into bugtest values('c');
INSERT 0 1
postgres=# insert into bugtest values('d');
INSERT 0 1
postgres=# insert into bugtest values('e');
INSERT 0 1
postgres=# select count(*) from bugtest where fld1 in ('a','b','c',
postgres(# 'd','e');
count
-------
5
(1 row)
postgres=# select count(*) from bugtest where fld1 in ('a','b','c'
postgres(# 'd','e');
count
-------
3
(1 row)
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