Re: [HACKERS] char(n) default '' crashes server

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: eberger(at)gewi(dot)kfunigraz(dot)ac(dot)at (Erich Stamberger)
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] char(n) default '' crashes server
Date: 1999-03-15 14:52:13
Message-ID: 199903151452.JAA12847@candle.pha.pa.us
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Yes, this crashes under the current backend code too. We are looking at
it.

> Hi,
>
> I found a bug in 6.4.2 which seems to be
> related to the char(n) type and shows up
> if one assigns a zero-length default value.
>
> Here is an example:
>
>
> test=> create table t1 (
> test-> str1 char(2) default '', <---- note this one
> test-> str2 text default '',
> test-> str3 text default ''
> test-> );
> CREATE
>
> test=> insert into t1 values ('aa', 'string2', 'string3');
> INSERT 91278 1
> test=> insert into t1 (str3) values ('string3');
> INSERT 91279 1
> test=>test=> select * from t1;
> Backend message type 0x44 arrived while idle
> Backend message type 0x44 arrived while idle
> We have lost the connection to the backend, so further processing is
> impossible. Terminating.
>
> If the table is created as
>
> create table t1 (
> str1 char(2) default ' ',
> str2 text default '',
> str3 text default ''
> );
>
> the crash doesn't happen.
>
> Regards
> Erich
>
>
>

--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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