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Bug #25093 no way to free failed query => memory leak
Submitted: 2003-08-14 06:51 UTC Modified: 2003-08-15 07:05 UTC
From: php at pv2c dot sk Assigned:
Status: Closed Package: PostgreSQL related
PHP Version: 4.3.2 OS: Linux
Private report: No CVE-ID:
 [2003-08-14 06:51 UTC] php at pv2c dot sk
pg_query doesn't return resource for failed queries - that's not very wise, IMHO (see related bug 18747), but the real problem with this is, that you cannot free failed results.

It may not be noticeable if you have only a few failed queries, but it becomes a serious problem if you have lots. Try the example code.

Reproduce code:
// assume one table "aaa" with one column "test", that is
// unique (primary key maybe)


for($t=0; $t<10000; $t++)
  $ret = pg_query($con, "INSERT INTO aaa (test) VALUES 1");
  // $ret is FALSE (cannot inset duplicate value) => no way to free it

Expected result:
Some way to free the result resource...

Actual result:
PHP memory consumption grows *really fast*, in my case it even ignores memory_limit setting in php.ini.


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 [2003-08-14 06:53 UTC] php at pv2c dot sk
Sorry :), correct SQL in pg_query should be:
"INSERT INTO aaa (test) VALUES (1);"
 [2003-08-15 07:05 UTC]
This bug has been fixed in CVS.

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