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<?php
/*
@author dhtmlx.com
@license GPL, see license.txt
*/
require_once("db_common.php");
/*! Implementation of DataWrapper for PostgreSQL
**/
class PostgreDBDataWrapper extends DBDataWrapper{
public function query($sql){
LogMaster::log($sql);
$res=pg_query($this->connection,$sql);
if ($res===false) throw new Exception("Postgre - sql execution failed\n".pg_last_error($this->connection));
return $res;
}
protected function select_query($select,$from,$where,$sort,$start,$count){
if (!$from)
return $select;
$sql="SELECT ".$select." FROM ".$from;
if ($where) $sql.=" WHERE ".$where;
if ($sort) $sql.=" ORDER BY ".$sort;
if ($start || $count)
$sql.=" OFFSET ".$start." LIMIT ".$count;
return $sql;
}
public function get_next($res){
return pg_fetch_assoc($res);
}
public function get_new_id(){
$res = pg_query( $this->connection, "SELECT LASTVAL() AS seq");
$data = pg_fetch_assoc($res);
pg_free_result($res);
return $data['seq'];
}
public function escape($data){
//need to use oci_bind_by_name
return pg_escape_string($this->connection,$data);
}
public function tables_list() {
$sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
$res = pg_query($this->connection, $sql);
$tables = array();
while ($table = pg_fetch_assoc($res)) {
$tables[] = $table['table_name'];
}
return $tables;
}
public function fields_list($table) {
$sql = "SELECT * FROM information_schema.constraint_column_usage";
$result = pg_query($this->connection, $sql);
$field = pg_fetch_assoc($result);
$id = $field['column_name'];
$sql = "SELECT * FROM information_schema.columns WHERE table_name ='".$table."';";
$result = pg_query($this->connection, $sql);
$fields = array();
$id = "";
while ($field = pg_fetch_assoc($result)) {
$fields[] = $field["column_name"];
}
return array('fields' => $fields, 'key' => $id );
}
}
?>
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