Re: tsearch2 problem rank_cd() (possibly) crashing postgres

You need to read documentation ! rank_cd accepts the same args as rank()
function.

Oleg
On Fri, 8 Dec 2006, Rajesh Kumar Mallah wrote:

> Hi ,
>
> We recently upgraded from PostgreSQL 8.1.5 to PostgreSQL 8.2.0.
> looks like rank_cd function is giving problem .
>
> tradein_clients=> CREATE TABLE test (name text , name_vec tsvector);
> CREATE TABLE
> tradein_clients=> INSERT INTO test (name ,name_vec) values ('hello
> world' , to_tsvector('hello world'));
> INSERT 0 1
> tradein_clients=> SELECT name from test where name_vec @@
> to_tsquery('hello') ;
> +-------------+
> | name |
> +-------------+
> | hello world |
> +-------------+
> (1 row)
>
> tradein_clients=> SELECT name, rank_cd(1,name_vec,
> to_tsquery('hello') ) as rank from test where name_vec @@
> to_tsquery('hello') ;
> server closed the connection unexpectedly
> This probably means the server terminated abnormally
> before or while processing the request.
> The connection to the server was lost. Attempting reset: Succeeded.
> tradein_clients=>
>
> Analysis of core dump: (not sure though if its the right way of doing it)
>
>
> $ gdb /opt/usr/local/pgsql/bin/postgres core.2807
>
> GNU gdb 5.3-25mdk (Mandrake Linux)
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "i586-mandrake-linux-gnu"...
> Core was generated by `postgres: tradein tradein_clients 192.168.0.11(52876'.
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /lib/libcrypt.so.1...done.
> Loaded symbols for /lib/libcrypt.so.1
> Reading symbols from /lib/libdl.so.2...done.
> Loaded symbols for /lib/libdl.so.2
> Reading symbols from /lib/i686/libm.so.6...done.
> Loaded symbols for /lib/i686/libm.so.6
> Reading symbols from /lib/i686/libc.so.6...done.
> Loaded symbols for /lib/i686/libc.so.6
> Reading symbols from /lib/ld-linux.so.2...done.
> Loaded symbols for /lib/ld-linux.so.2
> Reading symbols from /lib/libnss_files.so.2...done.
> Loaded symbols for /lib/libnss_files.so.2
> Reading symbols from
> /mnt/disk3/opt/usr/local/postgresql820/lib/tsearch2.so...done.
> Loaded symbols for /mnt/disk3/opt/usr/local/postgresql820/lib/tsearch2.so
> #0 pg_detoast_datum (datum=0x1) at fmgr.c:1964
> 1964 if (VARATT_IS_EXTENDED(datum))
> (gdb) bt
> #0 pg_detoast_datum (datum=0x1) at fmgr.c:1964
> #1 0x40c2a961 in rank_cd (fcinfo=0xbfffeda0) at rank.c:731
> #2 0x0815948c in ExecMakeFunctionResult (fcache=0x8423c40,
> econtext=0x84239a8,
> isNull=0x8424c85 "\177~\177\177\177\177\177\034\210(at)\b\b",
> isDone=0x8424c9c) at execQual.c:1147
> #3 0x0815d373 in ExecTargetList (targetlist=0x8423c08,
> econtext=0x84239a8, values=0x8424c70, isnull=0x8424c84 "",
> itemIsDone=0x8424c98, isDone=0xbffff068) at execQual.c:3981
> #4 0x0815d672 in ExecProject (projInfo=0x8424bac, isDone=0xbffff068)
> at execQual.c:4182
> #5 0x0815d785 in ExecScan (node=0x8423b00, accessMtd=0x8169290
> <SeqNext>) at execScan.c:143
> #6 0x08169364 in ExecSeqScan (node=0x8423b00) at nodeSeqscan.c:130
> #7 0x08157cb1 in ExecProcNode (node=0x8423b00) at execProcnode.c:349
> #8 0x08155d5c in ExecutePlan (estate=0x842391c, planstate=0x8423b00,
> operation=CMD_SELECT, numberTuples=0,
> direction=ForwardScanDirection, dest=0x83edfbc) at execMain.c:1081
> #9 0x08154fbe in ExecutorRun (queryDesc=0x8423b00,
> direction=ForwardScanDirection, count=0) at execMain.c:241
> #10 0x081e5ee1 in PortalRunSelect (portal=0x840f96c, forward=1 '\001',
> count=0, dest=0x83edfbc) at pquery.c:831
> #11 0x081e5a91 in PortalRun (portal=0x840f96c, count=2147483647,
> dest=0x83edfbc, altdest=0x83edfbc,
> completionTag=0xbffff320 "") at pquery.c:684
> #12 0x081e1368 in exec_simple_query (
> query_string=0x83ed064 "SELECT name, rank_cd(1,name_vec,
> to_tsquery('hello') ) as rank from test where name_vec @@
> to_tsquery('hello') ;") at postgres.c:939
> #13 0x081e4932 in PostgresMain (argc=4, argv=0x83b09f4,
> username=0x83b09c4 "tradein") at postgres.c:3419
> #14 0x081bb396 in BackendRun (port=0x839e9a8) at postmaster.c:2926
> #15 0x081babde in BackendStartup (port=0x839e9a8) at postmaster.c:2553
> #16 0x081b8db7 in ServerLoop () at postmaster.c:1206
> #17 0x081b822d in PostmasterMain (argc=1, argv=0x83937d8) at postmaster.c:958
> #18 0x08177117 in main (argc=1, argv=0x1) at main.c:188
> #19 0x40085c57 in __libc_start_main () from /lib/i686/libc.so.6
> (gdb)
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: don't forget to increase your free space map settings
>

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83