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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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4
src/backend/access/common/printtup.c
View File

@ -229,9 +229,7 @@ SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist, int16 *formats)
atttypid = getBaseTypeAndTypmod(atttypid, &atttypmod);
pq_sendint(&buf, (int) atttypid, sizeof(atttypid));
pq_sendint(&buf, attrs[i]->attlen, sizeof(attrs[i]->attlen));
/* typmod appears in protocol 2.0 and up */
if (proto >= 2)
pq_sendint(&buf, atttypmod, sizeof(atttypmod));
pq_sendint(&buf, atttypmod, sizeof(atttypmod));
/* format info appears in protocol 3.0 and up */
if (proto >= 3)
{

28
src/backend/commands/copy.c
View File

@ -353,7 +353,7 @@ SendCopyBegin(CopyState cstate)
pq_endmessage(&buf);
cstate->copy_dest = COPY_NEW_FE;
}
else if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
else
{
/* old way */
if (cstate->binary)
@ -365,18 +365,6 @@ SendCopyBegin(CopyState cstate)
pq_startcopyout();
cstate->copy_dest = COPY_OLD_FE;
}
else
{
/* very old way */
if (cstate->binary)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY BINARY is not supported to stdout or from stdin")));
pq_putemptymessage('B');
/* grottiness needed for old COPY OUT protocol */
pq_startcopyout();
cstate->copy_dest = COPY_OLD_FE;
}
}
static void
@ -399,7 +387,7 @@ ReceiveCopyBegin(CopyState cstate)
cstate->copy_dest = COPY_NEW_FE;
cstate->fe_msgbuf = makeStringInfo();
}
else if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
else
{
/* old way */
if (cstate->binary)
@ -411,18 +399,6 @@ ReceiveCopyBegin(CopyState cstate)
pq_startmsgread();
cstate->copy_dest = COPY_OLD_FE;
}
else
{
/* very old way */
if (cstate->binary)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY BINARY is not supported to stdout or from stdin")));
pq_putemptymessage('D');
/* any error in old protocol will make us lose sync */
pq_startmsgread();
cstate->copy_dest = COPY_OLD_FE;
}
/* We *must* flush here to ensure FE knows it can send. */
pq_flush();
}

6
src/backend/tcop/dest.c
View File

@ -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;

2
src/include/libpq/pqcomm.h
View File

@ -107,7 +107,7 @@ typedef struct
/* The earliest and latest frontend/backend protocol version supported. */
#define PG_PROTOCOL_EARLIEST PG_PROTOCOL(1,0)
#define PG_PROTOCOL_EARLIEST PG_PROTOCOL(2,0)
#define PG_PROTOCOL_LATEST PG_PROTOCOL(3,0)
typedef uint32 ProtocolVersion; /* FE/BE protocol version number */