#33587 [Opn->Bgs]: pg_query fetches ALL rows, using lots of memory
| From: | tony2001@php.net | Date: | Wed, 06 Jul 2005 12:00:03 +0000 |
| Subject: | #33587 [Opn->Bgs]: pg_query fetches ALL rows, using lots of memory | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-81472@lists.php.net to get a copy of this message | ||
ID: 33587
Updated by: tony2001@php.net
Reported By: vda at ilport dot com dot ua
-Status: Open
+Status: Bogus
Bug Type: PostgreSQL related
Operating System: Linux
PHP Version: 4.3.10
New Comment:
Yes.
PostgreSQL bugs do not belong here, report them to the PG developers
instead.
Previous Comments:
------------------------------------------------------------------------
[2005-07-06 13:58:07] vda at ilport dot com dot ua
I've seen several vague bug reports here "PHP eats lots
of mem with PostgreSQL" but none was researched in any depth. I thought
I can spend at least ten minutes at it.
Also I wanted to have an URL where this bug is reported.
Apparently PostgreSQL team does not have bugzilla.
I reported the issue to PostgreSQL team also
using http://www.postgresql.org/support/submitbug,
repeating bug report and also gave then URL
to this page.
Did I do something wrong?
------------------------------------------------------------------------
[2005-07-06 13:39:29] tony2001@php.net
>I think this is a problem with PostgreSQL client libs.
Please explain:
you think that this is a problem with PG client libs and you're
reporting it in PHP bug system?
------------------------------------------------------------------------
[2005-07-06 13:19:28] vda at ilport dot com dot ua
Description:
------------
Seen on php-4.3.4RC2. Since I was just testing how good
PG fares compared to Oracle, and I am not feeling any
real pain from this (IOW: not my itch to scratch),
I do not research this in depth, apart from submitting
bug report. Sorry.
Symptom: even the simplest query
$result = pg_query($db, "SELECT * FROM big_table");
eats enormous amounts of memory on server
(proportional to table size).
I think this is a problem with PostgreSQL client libs.
php's source is included for easy reference.
PHP_FUNCTION(pg_query)
{
...
pgsql_result = PQexec(pgsql, Z_STRVAL_PP(query));
if ((PGG(auto_reset_persistent) & 2) && PQstatus(pgsql) !=
CONNECTION_OK) {
PQclear(pgsql_result);
PQreset(pgsql);
pgsql_result = PQexec(pgsql, Z_STRVAL_PP(query));
}
if (pgsql_result) {
status = PQresultStatus(pgsql_result);
} else {
status = (ExecStatusType) PQstatus(pgsql);
}
switch (status) {
case PGRES_EMPTY_QUERY:
case PGRES_BAD_RESPONSE:
case PGRES_NONFATAL_ERROR:
case PGRES_FATAL_ERROR:
php_error_docref(NULL TSRMLS_CC, E_WARNING,
"Query failed: %s.", PQerrorMessage(pgsql));
PQclear(pgsql_result);
RETURN_FALSE;
break;
case PGRES_COMMAND_OK: /* successful command that did
not return rows */
default:
if (pgsql_result) {
pg_result = (pgsql_result_handle *)
emalloc(sizeof(pgsql_result_handle));
pg_result->conn = pgsql;
pg_result->result = pgsql_result;
pg_result->row = 0;
ZEND_REGISTER_RESOURCE(return_value,
pg_result, le_result);
} else {
PQclear(pgsql_result);
RETURN_FALSE;
}
break;
}
}
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=33587&edit=1