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Revert "Fix bug in checking of IDENTIFY_SYSTEM result."
This reverts commit 083d29c65b
.
The commit changed the code so that it causes an errors when
IDENTIFY_SYSTEM returns three columns. But which prevents us
from using the replication-related utilities against the server
with older version. This is not what we want. For that
compatibility, we allow the utilities to receive three columns
as the result of IDENTIFY_SYSTEM eventhough it actually returns
four columns in 9.4 or later.
Pointed out by Andres Freund.
This commit is contained in:
parent
c41996b18c
commit
e0d010f64c
@ -131,7 +131,7 @@ libpqrcv_identify_system(TimeLineID *primary_tli)
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"the primary server: %s",
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PQerrorMessage(streamConn))));
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}
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if (PQnfields(res) < 4 || PQntuples(res) != 1)
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if (PQnfields(res) < 3 || PQntuples(res) != 1)
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{
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int ntuples = PQntuples(res);
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int nfields = PQnfields(res);
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@ -140,7 +140,7 @@ libpqrcv_identify_system(TimeLineID *primary_tli)
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ereport(ERROR,
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(errmsg("invalid response from primary server"),
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errdetail("Could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields.",
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ntuples, nfields, 4, 1)));
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ntuples, nfields, 3, 1)));
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}
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primary_sysid = PQgetvalue(res, 0, 0);
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*primary_tli = pg_atoi(PQgetvalue(res, 0, 1), 4, 0);
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@ -1644,11 +1644,11 @@ BaseBackup(void)
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progname, "IDENTIFY_SYSTEM", PQerrorMessage(conn));
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disconnect_and_exit(1);
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}
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if (PQntuples(res) != 1 || PQnfields(res) < 4)
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if (PQntuples(res) != 1 || PQnfields(res) < 3)
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{
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fprintf(stderr,
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_("%s: could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields\n"),
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progname, PQntuples(res), PQnfields(res), 1, 4);
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progname, PQntuples(res), PQnfields(res), 1, 3);
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disconnect_and_exit(1);
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}
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sysidentifier = pg_strdup(PQgetvalue(res, 0, 0));
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@ -287,11 +287,11 @@ StreamLog(void)
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progname, "IDENTIFY_SYSTEM", PQerrorMessage(conn));
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disconnect_and_exit(1);
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}
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if (PQntuples(res) != 1 || PQnfields(res) < 4)
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if (PQntuples(res) != 1 || PQnfields(res) < 3)
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{
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fprintf(stderr,
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_("%s: could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields\n"),
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progname, PQntuples(res), PQnfields(res), 1, 4);
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progname, PQntuples(res), PQnfields(res), 1, 3);
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disconnect_and_exit(1);
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}
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servertli = atoi(PQgetvalue(res, 0, 1));
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@ -472,11 +472,11 @@ ReceiveXlogStream(PGconn *conn, XLogRecPtr startpos, uint32 timeline,
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PQclear(res);
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return false;
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}
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if (PQntuples(res) != 1 || PQnfields(res) < 4)
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if (PQntuples(res) != 1 || PQnfields(res) < 3)
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{
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fprintf(stderr,
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_("%s: could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields\n"),
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progname, PQntuples(res), PQnfields(res), 1, 4);
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progname, PQntuples(res), PQnfields(res), 1, 3);
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PQclear(res);
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return false;
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}
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