Beispiel #1
0
        public IEnumerable <T> ExecuteQuery <T>(TableMapping map, object[] source)
        {
            CheckDisposed();
            Log(nameof(ExecuteQuery), source);
            OnExecutionStarted();

            var sw = Stopwatch.StartNew();

            try
            {
                var r = Result.OK;

                if (!Prepared)
                {
                    Statement = Prepare();
                    Prepared  = true;
                }

                //bind the values.
                if (source != null)
                {
                    for (int i = 0; i < source.Length; i++)
                    {
                        BindParameter(Statement, i + 1, source[i], Connection.StoreDateTimeAsTicks);
                    }
                }

                var cols = new TableColumn[SQLite3.ColumnCount(Statement)];

                for (int i = 0; i < cols.Length; i++)
                {
                    var name = SQLite3.ColumnNameUTF8(Statement, i);
                    cols[i] = map.FindColumn(name);
                }

                while (SQLite3.Step(Statement) == Result.Row)
                {
                    var obj = map.CreateInstance();
                    for (int i = 0; i < cols.Length; i++)
                    {
                        if (cols[i] == null)
                        {
                            continue;
                        }
                        var colType = SQLite3.ColumnType(Statement, i);
                        var val     = ReadCol(Statement, i, colType, cols[i].ColumnType, cols[i].PropertyDefaultValue);
                        cols[i].SetValue(obj, val);
                    }
                    OnInstanceCreated(obj);
                    yield return((T)obj);
                }

                if (r == Result.Done || r == Result.OK)
                {
                }
                else
                {
                    var msg = SQLite3.GetErrorMessageUTF8(Connection.Handle);
                    var ex  = new SQLiteException(r, msg, sql: CommandText);
                    ex.PopulateColumnFromTableMapping(map);

                    throw ex;
                }
            }
            finally
            {
                if (Statement != null)
                {
                    SQLite3.Reset(Statement);
                }

                sw.Stop();
                Log(sw);
                OnExecutionEnded();
            }
        }