self.query_done = True
                if_has_calls = ""
                if IsSelectable(glb.db, "comms", columns = "has_calls"):
-                       if_has_calls = " WHERE has_calls = TRUE"
+                       if_has_calls = " WHERE has_calls = " + glb.dbref.TRUE
                query = QSqlQuery(glb.db)
                QueryExec(query, "SELECT id, comm FROM comms" + if_has_calls)
                while query.next():
                self.query_done = True
                if_has_calls = ""
                if IsSelectable(glb.db, "comms", columns = "has_calls"):
-                       if_has_calls = " WHERE has_calls = TRUE"
+                       if_has_calls = " WHERE has_calls = " + glb.dbref.TRUE
                query = QSqlQuery(glb.db)
                QueryExec(query, "SELECT id, comm FROM comms" + if_has_calls)
                while query.next():
                QueryExec(query, "SELECT id, c_time"
                                        " FROM comms"
                                        " WHERE c_thread_id = " + str(thread_id) +
-                                       "   AND exec_flag = TRUE"
+                                       "   AND exec_flag = " + self.collection.glb.dbref.TRUE +
                                        "   AND c_time >= " + str(start_time) +
                                        "   AND c_time <= " + str(end_time) +
                                        " ORDER BY c_time, id")
        def __init__(self, is_sqlite3, dbname):
                self.is_sqlite3 = is_sqlite3
                self.dbname = dbname
+               self.TRUE = "TRUE"
+               self.FALSE = "FALSE"
+               # SQLite prior to version 3.23 does not support TRUE and FALSE
+               if self.is_sqlite3:
+                       self.TRUE = "1"
+                       self.FALSE = "0"
 
        def Open(self, connection_name):
                dbname = self.dbname