query($query);
}
function connect() {
if ( 0 == $this->Link_ID ) {
$cstr = "dbname=".$this->Database.
$this->ifadd($this->Host, "host=").
$this->ifadd($this->Port, "port=").
$this->ifadd($this->User, "user=").
$this->ifadd($this->Password, "password=");
$this->Link_ID=pg_pconnect($cstr);
if (!$this->Link_ID) {
$this->halt("Link-ID == false, pconnect failed");
}
}
}
function query($Query_String) {
/* No empty queries, please, since PHP4 chokes on them. */
if ($Query_String == "")
/* The empty query string is passed on from the constructor,
* when calling the class without a query, e.g. in situations
* like these: '$db = new DB_Sql_Subclass;'
*/
return 0;
$this->connect();
if ($this->Debug)
printf("
Debug: query = %s
\n", $Query_String);
$this->Query_ID = pg_Exec($this->Link_ID, $Query_String);
$this->Row = 0;
$this->Error = pg_ErrorMessage($this->Link_ID);
$this->Errno = ($this->Error == "")?0:1;
if (!$this->Query_ID) {
$this->halt("Invalid SQL: ".$Query_String);
}
return $this->Query_ID;
}
function next_record() {
$this->Record = @pg_fetch_array($this->Query_ID, $this->Row++);
$this->Error = pg_ErrorMessage($this->Link_ID);
$this->Errno = ($this->Error == "")?0:1;
$stat = is_array($this->Record);
if (!$stat && $this->Auto_Free) {
pg_freeresult($this->Query_ID);
$this->Query_ID = 0;
}
return $stat;
}
function seek($pos) {
$this->Row = $pos;
}
function lock($table, $mode = "write") {
if ($mode == "write") {
$result = pg_Exec($this->Link_ID, "lock table $table");
} else {
$result = 1;
}
return $result;
}
function unlock() {
return pg_Exec($this->Link_ID, "commit");
}
/* public: sequence numbers */
function nextid($seq_name) {
$this->connect();
if ($this->lock($this->Seq_Table)) {
/* get sequence number (locked) and increment */
$q = sprintf("select nextid from %s where seq_name = '%s'",
$this->Seq_Table,
$seq_name);
$id = @pg_Exec($this->Link_ID, $q);
$res = @pg_Fetch_Array($id, 0);
/* No current value, make one */
if (!is_array($res)) {
$currentid = 0;
$q = sprintf("insert into %s values('%s', %s)",
$this->Seq_Table,
$seq_name,
$currentid);
$id = @pg_Exec($this->Link_ID, $q);
} else {
$currentid = $res["nextid"];
}
$nextid = $currentid + 1;
$q = sprintf("update %s set nextid = '%s' where seq_name = '%s'",
$this->Seq_Table,
$nextid,
$seq_name);
$id = @pg_Exec($this->Link_ID, $q);
$this->unlock();
} else {
$this->halt("cannot lock ".$this->Seq_Table." - has it been created?");
return 0;
}
return $nextid;
}
function metadata($table) {
$count = 0;
$id = 0;
$res = array();
$this->connect();
$id = pg_exec($this->Link_ID, "select * from $table");
if ($id < 0) {
$this->Error = pg_ErrorMessage($id);
$this->Errno = 1;
$this->halt("Metadata query failed.");
}
$count = pg_NumFields($id);
for ($i=0; $i<$count; $i++) {
$res[$i]["table"] = $table;
$res[$i]["name"] = pg_FieldName ($id, $i);
$res[$i]["type"] = pg_FieldType ($id, $i);
$res[$i]["len"] = pg_FieldSize ($id, $i);
$res[$i]["flags"] = "";
}
pg_FreeResult($id);
return $res;
}
function affected_rows() {
return pg_cmdtuples($this->Query_ID);
}
function num_rows() {
return pg_numrows($this->Query_ID);
}
function num_fields() {
return pg_numfields($this->Query_ID);
}
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Name) {
return $this->Record[$Name];
}
function p($Name) {
print $this->Record[$Name];
}
function halt($msg) {
printf("Database error: %s
\n", $msg);
printf("PostgreSQL Error: %s (%s)
\n",
$this->Errno,
$this->Error);
die("Session halted.");
}
function table_names() {
$this->query("select relname from pg_class where relkind = 'r' and not relname like 'pg_%'");
$i=0;
while ($this->next_record())
{
$return[$i]["table_name"]= $this->f(0);
$return[$i]["tablespace_name"]=$this->Database;
$return[$i]["database"]=$this->Database;
$i++;
}
return $return;
}
}
?>