Is it a bug? - Mailing list pgsql-hackers
From | Mauricio da Silva Barrios |
---|---|
Subject | Is it a bug? |
Date | |
Msg-id | 20000218163323.346CF7222@zipmx11.zipmail.com.br Whole thread Raw |
Responses |
Re: Is it a bug?
|
List | pgsql-hackers |
Hello, people! I'm having a problem with postgres, and I wanna know if anyone out there might give me some help... My problem is this: I have a table. When I run a select over it, the result comes OK. BUT, if I create a view with the same select, when I run a select on the view, if the table has any data my computer explodes on my face! I have made other views, and they work fine, but they dont have subqueries with reference to its parent query. Have any of you ever faced this problem, or created a view like mine that worked? how do I overcome my troubles?? Here follow my select, my table and all things I did (not much) to generate the crash. If you think you might help me and want more info about my system or postgres, mail me. ------------------------------------------------------------------------- ------- [user@server dir]$ psql mydb Welcome to POSTGRESQL interactive sql monitor: Please read the file COPYRIGHT for copyright terms of PSTGRESQL [PostgreSQL 6.5.3 on i686-pc-linux-gnu, compiled by gcc pgcc-2.91.66] type \? for help on slash commands type \q to quit type \g or terminate with semicolon to execute queryYou are currentlyconnected to the database: mydb mydb=> CREATE TABLE connection ( connection_id INT4 primary key, connection_owner INT4, -- Foreign Key for userstable connection_start TIMESTAMP, connection_end RELTIME ); NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index 'connection_pkey' for table 'connection' CREATE mydb=> CREATE VIEW connection_last AS SELECT * FROM connection as con_out WHERE connection_start IN ( SELECT max(connection_start)FROM connection as con_in WHERE con_in.connection_owner = con_out.connection_owner GROUP BY connection_owner); CREATE mydb=> SELECT * FROM connection_last; connection_id|connection_owner|connection_start|connection_end -------------+----------------+----------------+-------------- (0 rows) mydb=> INSERT INTO connection VALUES (3,'2','22-01-01','122'); INSERT 172197 1 mydb=> select * from connection; connection_id|connection_owner|connection_start |connection_end -------------+----------------+----------------------+--------------- 3| 2|2001-01-22 00:00:00-02|@2 mins 2 secs (1 row) mydb=> SELECT * FROM connection as con_out WHERE connection_start IN ( SELECT max(connection_start) FROM connection as con_in WHERE con_in.connection_owner = con_out.connection_owner GROUP BY connection_owner); connection_id|connection_owner|connection_start |connection_end -------------+----------------+----------------------+--------------- 3| 2|2001-01-22 00:00:00-02|@2 mins 2 secs (1 row) mydb=> select * from connection_last; pqReadData() -- backend closed the channel unexpectedly. This probably means the backend terminated abnormally before or while processing the request. We have lost the connection to the backend, so further processing is impossible.Terminating. [user@server dir]$ ------------------------------------------------------------------------- ----------- _____________________________________________________________ GUNS N' ROSES. Eles estão de volta no novo CD Live Era 87-93. Fundamental para entender a história do rock dos anos 90. Fundamental comprar logo. Só R$ 20,90 no Submarino. PROMOÇÃO MOUSE VERMELHO http://www.submarino.com.br/default.asp?franq=100037 _____________________________________________________________
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