BUG #6234: Memory leak from PQexec

The following bug has been logged online:

Bug reference: 6234
Logged by: Vikas Mehta
Email address: mehta(at)roguewave(dot)com
PostgreSQL version: 8.4.8
Operating system: Windows
Description: Memory leak from PQexec
Details:

Purify shows 448 bytes of memory leaks with PQexec:

[W] Summary of all memory leaks... {448 bytes, 11 blocks}
[W] MLK: Memory leak of 128 bytes from 1 block allocated in
ERR_load_SSL_strings [SSLEAY32.DLL]
[W] MLK: Memory leak of 128 bytes from 1 block allocated in
PQrequestCancel [LIBPQ.DLL]
[W] MLK: Memory leak of 128 bytes from 1 block allocated in
ENGINE_load_ubsec [LIBEAY32.DLL]
[W] MLK: Memory leak of 64 bytes from 8 blocks allocated in
add_error_table [COMERR32.DLL]

Test case:
==========

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <libpq-fe.h>

void createTestTable(PGconn* dbc)
{
PGresult *res;

printf("\n\nCreating Test Table.....\n");

res = PQexec(dbc, "create table mytable (col1 int)");
if (PQresultStatus(res) == PGRES_NONFATAL_ERROR || PQresultStatus(res)
== PGRES_FATAL_ERROR) {
printf("!!!!! Failed to create test table.\n");
}
PQclear(res);
}

void dropTestTable(PGconn* dbc)
{
PGresult *res;

printf("\n\nDropping Test Table.....\n");

res = PQexec(dbc, "drop table mytable");
if (PQresultStatus(res) == PGRES_NONFATAL_ERROR || PQresultStatus(res)
== PGRES_FATAL_ERROR) {
printf("!!!!! Failed to drop test table.\n");
}
PQclear(res);
}

int main()
{
PGconn *dbc;

dbc = PQconnectdb("host = magma.cvo.roguewave.com user = username
password = pwd dbname = db");

if(dbc == 0 || PQstatus(dbc) == CONNECTION_BAD) {
printf("!!!!! Failed to establish connection.\n");
}

createTestTable(dbc);

dropTestTable(dbc);

PQfinish(dbc);

return 0;
}