PgDB: add possibility to provide query parameters on doSelect()

PgDB.py

@@ -70,15 +70,18 @@ class PgDB(object):
 			self.con.rollback()
 			return False
 
-	def doSelect(self,sql):
-		cursor = self.con.cursor()
-		try:
-			cursor.execute(sql)
-			results = cursor.fetchall()
-			return results
-		except Exception:
-			logging.error(u'Error during SQL request "%s"', sql.decode('utf-8', 'ignore'), exc_info=1)
-			return False
+    def doSelect(self,sql,params):
+        cursor = self.con.cursor()
+        try:
+            if params is None:
+                cursor.execute(sql)
+            else:
+                cursor.execute(sql,params)
+            results = cursor.fetchall()
+            return results
+        except Exception:
+            logging.error(u'Error during SQL request "%s"', sql.decode('utf-8', 'ignore'), exc_info=1)
+            return False
 
 	#
 	# SQL helpers