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Fix psql's \copy command to ensure that it cycles libpq back to the idle state

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(in particular, causing the ReadyForQuery message to be eaten) before
returning from do_copy.  The only known consequence of failing to do so is
that get_prompt might show a wrong result for the %x transaction status
escape, as reported by Bernd Helmle; but it's possible there are other issues.

Back-patch as far as 7.4, the oldest version supporting %x.
This commit is contained in:
Tom Lane 2006-11-24 23:07:01 +00:00
parent db8a3fd680
commit fc821135fb
1 changed files with 13 additions and 1 deletions
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14
src/bin/psql/copy.c
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2005, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.55 2005/01/01 05:43:08 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.55.4.1 2006/11/24 23:07:01 tgl Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
@ -568,6 +568,18 @@ do_copy(const char *args)
PQclear(result);
/*
* Make sure we have pumped libpq dry of results; else it may still be
* in ASYNC_BUSY state, leading to false readings in, eg, get_prompt().
*/
while ((result = PQgetResult(pset.db)) != NULL)
{
success = false;
psql_error("\\copy: unexpected response (%d)\n",
PQresultStatus(result));
PQclear(result);
}
if (options->file != NULL)
{
if (fclose(copystream) != 0)