rdelaage
/
postgresql
mirror of https://git.postgresql.org/git/postgresql.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix libpq startup code to work correctly in autocommit off mode. 

In passing, fix breakage for case where PGCLIENTENCODING is set in
environment.
This commit is contained in:
Tom Lane 2002-10-15 01:48:25 +00:00
parent 9ff695c944
commit e258a2b436
1 changed files with 56 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

120
src/interfaces/libpq/fe-connect.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.209 2002/10/14 17:15:11 momjian Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.210 2002/10/15 01:48:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1583,8 +1583,6 @@ PQsetenvPoll(PGconn *conn)
{
PGresult *res;
static const char envname[] = "PGCLIENTENCODING";
if (conn == NULL || conn->status == CONNECTION_BAD)
return PGRES_POLLING_FAILED;
@ -1625,25 +1623,23 @@ PQsetenvPoll(PGconn *conn)
goto error_return;
}
keep_going: /* We will come back to here until there
* is nothing left to parse. */
switch (conn->setenv_state)
/* We will loop here until there is nothing left to do in this call. */
for (;;)
{
case SETENV_STATE_ENCODINGS_SEND:
switch (conn->setenv_state)
{
case SETENV_STATE_ENCODINGS_SEND:
{
const char *env;
const char *env = getenv("PGCLIENTENCODING");
env = getenv(envname);
if (!env || *env == '\0')
{
/*
* query server encoding if PGCLIENTENCODING is not
* specified
* PGCLIENTENCODING is not specified, so query server
* for it. We must use begin/commit in case autocommit
* is off by default.
*/
if (!PQsendQuery(conn,
"select getdatabaseencoding()"))
if (!PQsendQuery(conn, "begin; select getdatabaseencoding(); commit"))
goto error_return;
conn->setenv_state = SETENV_STATE_ENCODINGS_WAIT;
@ -1662,11 +1658,14 @@ keep_going: /* We will come back to here until there
goto error_return;
}
conn->client_encoding = encoding;
}
/* Move on to setting the environment options */
conn->setenv_state = SETENV_STATE_OPTION_SEND;
}
break;
}
case SETENV_STATE_ENCODINGS_WAIT:
case SETENV_STATE_ENCODINGS_WAIT:
{
if (PQisBusy(conn))
return PGRES_POLLING_READING;
@ -1675,37 +1674,35 @@ keep_going: /* We will come back to here until there
if (res)
{
char *encoding;
if (PQresultStatus(res) == PGRES_TUPLES_OK)
{
/* set client encoding in pg_conn struct */
char *encoding;
if (PQresultStatus(res) != PGRES_TUPLES_OK)
encoding = PQgetvalue(res, 0, 0);
if (!encoding) /* this should not happen */
conn->client_encoding = PG_SQL_ASCII;
else
conn->client_encoding = pg_char_to_encoding(encoding);
}
else if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
PQclear(res);
goto error_return;
}
/* set client encoding in pg_conn struct */
encoding = PQgetvalue(res, 0, 0);
if (!encoding) /* this should not happen */
conn->client_encoding = PG_SQL_ASCII;
else
conn->client_encoding = pg_char_to_encoding(encoding);
PQclear(res);
/*
* We have to keep going in order to clear up the
* query
*/
goto keep_going;
/* Keep reading until PQgetResult returns NULL */
}
/* NULL result indicates that the query is finished */
/* Move on to setting the environment options */
conn->setenv_state = SETENV_STATE_OPTION_SEND;
goto keep_going;
else
{
/* NULL result indicates that the query is finished */
/* Move on to setting the environment options */
conn->setenv_state = SETENV_STATE_OPTION_SEND;
}
break;
}
case SETENV_STATE_OPTION_SEND:
case SETENV_STATE_OPTION_SEND:
{
/* Send an Environment Option */
char setQuery[100]; /* note length limits in
@ -1740,11 +1737,10 @@ keep_going: /* We will come back to here until there
/* No more options to send, so we are done. */
conn->setenv_state = SETENV_STATE_IDLE;
}
goto keep_going;
break;
}
case SETENV_STATE_OPTION_WAIT:
case SETENV_STATE_OPTION_WAIT:
{
if (PQisBusy(conn))
return PGRES_POLLING_READING;
@ -1758,33 +1754,29 @@ keep_going: /* We will come back to here until there
PQclear(res);
goto error_return;
}
/* Don't need the result */
PQclear(res);
/*
* We have to keep going in order to clear up the
* query
*/
goto keep_going;
/* Keep reading until PQgetResult returns NULL */
}
/* NULL result indicates that the query is finished */
/* Send the next option */
conn->next_eo++;
conn->setenv_state = SETENV_STATE_OPTION_SEND;
goto keep_going;
else
{
/* NULL result indicates that the query is finished */
/* Send the next option */
conn->next_eo++;
conn->setenv_state = SETENV_STATE_OPTION_SEND;
}
break;
}
case SETENV_STATE_IDLE:
return PGRES_POLLING_OK;
case SETENV_STATE_IDLE:
return PGRES_POLLING_OK;
default:
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("invalid state %c, "
"probably indicative of memory corruption\n"),
conn->setenv_state);
goto error_return;
default:
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("invalid state %c, "
"probably indicative of memory corruption\n"),
conn->setenv_state);
goto error_return;
}
}
/* Unreachable */