From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | "Ligia Pimentel" <lmpimentel(at)yahoo(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Left join error |
Date: | 2001-11-06 19:14:56 |
Message-ID: | 17262.1005074096@sss.pgh.pa.us |
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Lists: | pgsql-sql |
"Ligia Pimentel" <lmpimentel(at)yahoo(dot)com> writes:
> I have a table with 146000+ records. I tried to select with a left join to
> another table but I get this message:
> ERROR: MemoryContextAlloc: invalid request size 4294967293
Hmm. This might indicate corrupted data --- do you see a similar error
if you just do "select * from cheques" or "select * from formasenblanco"?
If not, then I think you've run into a software bug. It'd be worth
while to update to 7.1.3 before pursuing it further. If you still see
the failure in 7.1.3 then I would like to see an EXPLAIN of the join
query as well as a stack backtrace from the error. The easiest way
to get the stack trace is
in window 1:
fire up psql
in window 2:
use ps to determine PID of the backend your psql is connected to
gdb /path/to/postgres-executable -- do this as postgres user
gdb> attach backend-PID-found-above
gdb> break elog
gdb> continue
in window 1:
issue the problem query
in window 2:
gdb should report reaching the breakpoint. Do
gdb> bt
--- copy & paste results printed here
gdb> quit
regards, tom lane
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