Re: [Proposal] Global temporary tables

On master with the v55 patches applied the following script leads to crash:
initdb -D data
pg_ctl -w -t 5 -D data -l server.log start

psql -t -c "begin; create global temp table gtt_with_index(a int primary
key, b text); commit; select pg_sleep(5);" >psql1.log &
psql -t -c "select pg_sleep(1); create index idx_b on gtt_with_index(b);"
>psql2.log &
for i in `seq 40`; do (psql -t -c "select pg_sleep(1); insert into
gtt_with_index values(1,'test');" &); done

sleep 10

and I got crash
INSERT 0 1
...
INSERT 0 1
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
connection to server was lost
WARNING: terminating connection because of crash of another server process
DETAIL: The postmaster has commanded this server process to roll back the
current transaction and exit, because another server process exited
abnormally and possibly corrupted shared memory.
HINT: In a moment you should be able to reconnect to the database and
repeat your command.
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
connection to server was lost

and some coredumps with the following stack:

[New LWP 1821493]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `postgres: andrew regression [local] INSERT
'.
Program terminated with signal SIGABRT, Aborted.
#0 __GI_raise (sig=sig(at)entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 __GI_raise (sig=sig(at)entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007f021d809859 in __GI_abort () at abort.c:79
#2 0x0000564dc1bd22e8 in ExceptionalCondition
(conditionName=conditionName(at)entry=0x564dc1c5c957
"index->rd_index->indisvalid", errorType=errorType(at)entry=0x564dc1c2a00b
"FailedAssertion", fileName=fileName(at)entry=0x564dc1c5c854 "storage_gtt.c",
lineNumber=lineNumber(at)entry=1381) at assert.c:69
#3 0x0000564dc185778b in init_gtt_storage
(operation=operation(at)entry=CMD_INSERT,
resultRelInfo=resultRelInfo(at)entry=0x564dc306f6c0) at storage_gtt.c:1381
#4 0x0000564dc194c888 in ExecInsert (mtstate=0x564dc306f4a8,
resultRelInfo=0x564dc306f6c0, slot=0x564dc30706d0, planSlot=0x564dc306fca0,
estate=0x564dc306f230, canSetTag=<optimized out>) at nodeModifyTable.c:638
#5 0x0000564dc194d945 in ExecModifyTable (pstate=<optimized out>) at
nodeModifyTable.c:2565
#6 0x0000564dc191ca83 in ExecProcNode (node=0x564dc306f4a8) at
../../../src/include/executor/executor.h:257
#7 ExecutePlan (execute_once=<optimized out>, dest=0x564dc310ed80,
direction=<optimized out>, numberTuples=0, sendTuples=<optimized out>,
operation=CMD_INSERT, use_parallel_mode=<optimized out>,
planstate=0x564dc306f4a8, estate=0x564dc306f230) at execMain.c:1555
#8 standard_ExecutorRun (queryDesc=0x564dc306bce0, direction=<optimized
out>, count=0, execute_once=<optimized out>) at execMain.c:361
#9 0x0000564dc1ab47a0 in ProcessQuery (plan=<optimized out>,
sourceText=0x564dc3049a30 "select pg_sleep(1); insert into gtt_with_index
values(1,'test');", params=0x0, queryEnv=0x0, dest=0x564dc310ed80,
qc=0x7ffd3a6cf2e0) at pquery.c:160
#10 0x0000564dc1ab52e2 in PortalRunMulti (portal=portal(at)entry=0x564dc30acd80,
isTopLevel=isTopLevel(at)entry=true, setHoldSnapshot=setHoldSnapshot(at)entry=false,
dest=dest(at)entry=0x564dc310ed80, altdest=altdest(at)entry=0x564dc310ed80,
qc=qc(at)entry=0x7ffd3a6cf2e0)
at pquery.c:1274
#11 0x0000564dc1ab5861 in PortalRun (portal=portal(at)entry=0x564dc30acd80,
count=count(at)entry=9223372036854775807, isTopLevel=isTopLevel(at)entry=true,
run_once=run_once(at)entry=true, dest=dest(at)entry=0x564dc310ed80,
altdest=altdest(at)entry=0x564dc310ed80, qc=0x7ffd3a6cf2e0)
at pquery.c:788
#12 0x0000564dc1ab1522 in exec_simple_query (query_string=0x564dc3049a30
"select pg_sleep(1); insert into gtt_with_index values(1,'test');") at
postgres.c:1214
#13 0x0000564dc1ab327a in PostgresMain (dbname=<optimized out>,
username=<optimized out>) at postgres.c:4497
#14 0x0000564dc1a1f539 in BackendRun (port=<optimized out>, port=<optimized
out>) at postmaster.c:4560
#15 BackendStartup (port=<optimized out>) at postmaster.c:4288
#16 ServerLoop () at postmaster.c:1801
#17 0x0000564dc1a2053c in PostmasterMain (argc=<optimized out>,
argv=0x564dc3043fc0) at postmaster.c:1473
#18 0x0000564dc1750180 in main (argc=3, argv=0x564dc3043fc0) at main.c:198
(gdb) q

I've built the server using gcc 9 as following:
./configure --enable-debug --enable-cassert

Thanks to Alexander Lakhin for simplifying the repro.

On Thu, Oct 14, 2021 at 3:29 PM wenjing zeng <wjzeng2012(at)gmail(dot)com> wrote:

>
> Be deeply grateful.
> Perhaps you can give the stack of problems so that you can start analyzing
> them as soon as possible.
>
> Wenjing
>
>