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Drop server support for FE/BE protocol version 1.0.

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While this isn't a lot of code, it's been essentially untestable for
a very long time, because libpq doesn't support anything older than
protocol 2.0, and has not since release 6.3.  There's no reason to
believe any other client-side code still uses that protocol, either.

Discussion: <2661.1475849167@sss.pgh.pa.us>
This commit is contained in:
Tom Lane
2016-10-11 12:19:18 -04:00
parent 2b860f52ed
commit 2f1eaf87e8
5 changed files with 8 additions and 35 deletions
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6
src/backend/tcop/dest.c
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@@ -218,8 +218,8 @@ NullCommand(CommandDest dest)
/* ----------------
* ReadyForQuery - tell dest that we are ready for a new query
*
* The ReadyForQuery message is sent in protocol versions 2.0 and up
* so that the FE can tell when we are done processing a query string.
* The ReadyForQuery message is sent so that the FE can tell when
* we are done processing a query string.
* In versions 3.0 and up, it also carries a transaction state indicator.
*
* Note that by flushing the stdio buffer here, we can avoid doing it
@@ -241,7 +241,7 @@ ReadyForQuery(CommandDest dest)
pq_sendbyte(&buf, TransactionBlockStatusCode());
pq_endmessage(&buf);
}
else if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
else
pq_putemptymessage('Z');
/* Flush output at end of cycle in any case. */
pq_flush();

3
src/backend/tcop/postgres.c
View File

@@ -3768,8 +3768,7 @@ PostgresMain(int argc, char *argv[],
/*
* Send this backend's cancellation info to the frontend.
*/
if (whereToSendOutput == DestRemote &&
PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
if (whereToSendOutput == DestRemote)
{
StringInfoData buf;