Thread: Bug with indexing int4?

Hello All,

I ma sorry, I have sent previous uncomplited e-mail accidentally.
I have created the table

CREATE TABLE "tt" (
        "cc" int4);
COPY "tt" FROM stdin;
-2112563299
-2111287024
-2110307960
.....

2146589610
2146589611
2146589612
\.

About 30 000 records totally

Then I am doing the following:

mdb=> select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

mdb=> create index i_tt_cc on tt (cc);
CREATE
mdb=> select cc from tt where cc = -2112563299;
cc
(0 rows)

mdb=> drop index i_tt_cc;
DROP
mdb=> select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

So, whith index postgresql works incorectly in this situation.
But when there are less records in the table (about 12 000),
everything works well.
I tested this on 3 different computers on Debian Linux 2.1 with
postgresql 6.5.2 and 6.5.3.

Best regards,
 Yury  ICQ 11831432
 mailto:yura@vpcit.ru

Yury Don wrote:

Hello All,

I ma sorry, I have sent previous uncomplited e-mail accidentally.
I have created the table

CREATE TABLE "tt" (
        "cc" int4);
COPY "tt" FROM stdin;
-2112563299
-2111287024
-2110307960
.....

2146589610
2146589611
2146589612
\.

About 30 000 records totally

Then I am doing the following:

mdb=> select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

mdb=> create index i_tt_cc on tt (cc);
CREATE
mdb=> select cc from tt where cc = -2112563299;
cc
(0 rows)

mdb=> drop index i_tt_cc;
DROP
mdb=> select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

So, whith index postgresql works incorectly in this situation.
But when there are less records in the table (about 12 000),
everything works well.
I tested this on 3 different computers on Debian Linux 2.1 with
postgresql 6.5.2 and 6.5.3.

Best regards,
 Yury  ICQ 11831432
 mailto:yura@vpcit.ru

************

hygea=> select version();
version
--------------------------------------------------------------
PostgreSQL 6.5.2 on i586-pc-linux-gnu, compiled by gcc 2.7.2.3
(1 row)

uname -a
Linux Debian 2.0.37 #1 Thu Sep 2 17:24:38 CEST 1999 i586 unknown

==================================================================

CREATE TABLE "tt" (
        "cc" int4);
CREATE
COPY "tt" FROM stdin;

select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

create index i_tt_cc on tt (cc);
CREATE
select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)

drop index i_tt_cc;
DROP
select cc from tt where cc = -2112563299;
         cc
-----------
-2112563299
(1 row)
 

José