mirrors
/
postgres
mirror of https://github.com/postgres/postgres
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix incorrect error message for IDENTIFY_SYSTEM 

Commit 5a991ef869 accidentally reversed the order of the tuples
and fields parameters, making the error message incorrectly refer
to 3 tuples with 1 field when IDENTIFY_SYSTEM returns 1 tuple and
3 or 4 fields. Fix by changing the order of the parameters.  This
also adds a comment describing why we check for < 3 when postgres
since 9.4 has been sending 4 fields.

Backpatch all the way since the bug is almost a decade old.

Author: Tomonari Katsumata <t.katsumata1122@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Bug: #18224
Backpatch-through: v12
This commit is contained in:
Daniel Gustafsson 2023-12-05 14:30:56 +01:00
parent 1171c6e741
commit bc0a368dc5
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/backend/replication/libpqwalreceiver/libpqwalreceiver.c
View File

@ -373,6 +373,10 @@ libpqrcv_identify_system(WalReceiverConn *conn, TimeLineID *primary_tli)
"the primary server: %s",
pchomp(PQerrorMessage(conn->streamConn)))));
}
/*
* IDENTIFY_SERVER returns 3 columns in 9.3 and earlier, and 4 columns in
* 9.4 and onwards.
*/
if (PQnfields(res) < 3 || PQntuples(res) != 1)
{
int ntuples = PQntuples(res);
@ -383,7 +387,7 @@ libpqrcv_identify_system(WalReceiverConn *conn, TimeLineID *primary_tli)
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid response from primary server"),
errdetail("Could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields.",
ntuples, nfields, 3, 1)));
ntuples, nfields, 1, 3)));
}
primary_sysid = pstrdup(PQgetvalue(res, 0, 0));
*primary_tli = pg_strtoint32(PQgetvalue(res, 0, 1));