[BUGS] Daylight saving bug in PostgreSQL 7.2.1 ?

[Jonas Lindholm]

Hi!

I believe I've found a bug with daylight saving time.
The example below shows that after inserting a row with a date and time 
when daylight saving is changing (6 April 2003 02:00:00) any selects 
using the same time and date are only returning correct result first 
time. If the select is done again the row is not found.

CREATE SEQUENCE timespan_idx_seq INCREMENT 1 MINVALUE 1 MAXVALUE 9223372036854775807 CACHE 1; 

CREATE TABLE timespan (
 host text NOT NULL,
 starttime timestamptz NOT NULL,
 endtime timestamptz NOT NULL,
 idx int8 DEFAULT nextval('"timespan_idx_seq"'::text) NOT NULL,
 CONSTRAINT timespan_pkey PRIMARY KEY (host, starttime, endtime)
) WITH OIDS;
-- Index: timespan_i1
CREATE INDEX timespan_i1 ON timespan USING btree (host);
-- Index: timespan_i2
CREATE INDEX timespan_i2 ON timespan USING btree (starttime);
-- Index: timespan_i3
CREATE INDEX timespan_i3 ON timespan USING btree (endtime);
-- Index: timespan_i4
CREATE UNIQUE INDEX timespan_i4 ON timespan USING btree (idx);
-- Index: timespan_i5
CREATE INDEX timespan_i5 ON timespan USING btree (host, starttime);
-- Index: timespan_i6
CREATE INDEX timespan_i6 ON timespan USING btree (host, endtime);
INSERT INTO timespan VALUES('XXXXXX', ' 6-APR-2003 02:00:00', ' 6-APR-2003 03:00:00');

test=# SELECT idx FROM timespan WHERE host='XXXXXX' AND starttime=' 6-APR-2003 
02:00:00' AND endtime=' 6-APR-2003 03:00:00';
idx
-----
  1  <============= correct
(1 row)
test=# SELECT idx FROM timespan WHERE host='XXXXXX' AND starttime=' 6-APR-2003 
02:00:00' AND endtime=' 6-APR-2003 03:00:00';
idx
-----
(0 rows) <=============== not correct
test=# SELECT idx FROM timespan WHERE host='XXXXXX' AND starttime=' 6-APR-2003 02:00:00' AND endtime=' 6-APR-2003 03:00:00';
idx
-----
(0 rows) <=============== not correct 

test=# \q
[EMAIL PROTECTED] scripts]# /usr/local/pgsql/bin/psql test
Welcome to psql, the PostgreSQL interactive terminal.
Type:  \copyright for distribution terms
      \h for help with SQL commands
      \? for help on internal slash commands
      \g or terminate with semicolon to execute query
      \q to quit
test=# SELECT idx FROM timespan WHERE host='XXXXXX' AND starttime=' 6-APR-2003 
02:00:00' AND endtime=' 6-APR-2003 03:00:00';
idx
-----
  1  <============= correct
(1 row)
test=# SELECT idx FROM timespan WHERE host='XXXXXX' AND starttime=' 6-APR-2003 
02:00:00' AND endtime=' 6-APR-2003 03:00:00';
idx
-----
(0 rows) <=============== not correct
/Jonas Lindholm

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