Re: An INSERT can kill the PostgreSQL server

Richi Plana <richip@mozcom.com> writes:
> create table devices (brand varchar(30), model varchar(30), serial
> varchar(30), ro_community varchar(50)[], rw_community varchar(50)[], primary
> key (brand, model, serial));

> create table routers (lo_address inet) inherits (devices);

> insert into routers values ('Cisco', '7206VXR', '72498595', '{"Butterflies",
> "Intehsoijfeijfjf"}', NULL, '10.2.3.4');

Ah, I see it: it's the NULL array value that is causing the problem.
6.5 parser didn't really handle the NULL properly, but 7.0's does:
it tries to apply array_map() to the NULL to ensure it's coerced to
50-chars-per-item length limit.  Which means array_map had better be
NULL-proof.

This patch is applied for 7.0.1, but if you need a fix now:

*** src/backend/utils/adt/arrayfuncs.c~    Wed Jan 26 00:57:12 2000
--- src/backend/utils/adt/arrayfuncs.c    Sun May 28 13:43:34 2000
***************
*** 1308,1313 ****
--- 1308,1317 ----
      char       *s;
      char       *p;
      va_list        ap;
+
+     /* Need to guard against NULL input array */
+     if (v == NULL)
+         return NULL;

      /* Large objects not yet supported */
      if (ARR_IS_LO(v) == true)



            regards, tom lane