feat: 支持不指定Group By子句

streamsql_test.go

@@ -145,3 +145,61 @@ func TestStreamsql(t *testing.T) {
 		assert.True(t, found, fmt.Sprintf("Expected result for device %v not found", expectedResult["device"]))
 	}
 }
+
+func TestStreamsqlWithoutGroupBy(t *testing.T) {
+	streamsql := New()
+	var rsql = "SELECT max(age) as max_age,min(score) as min_score,window_start() as start,window_end() as end FROM stream SlidingWindow('2s','1s') with (TIMESTAMP='Ts',TIMEUNIT='ss')"
+	err := streamsql.Execute(rsql)
+	assert.Nil(t, err)
+	strm := streamsql.stream
+	baseTime := time.Date(2025, 4, 7, 16, 46, 0, 0, time.UTC)
+	testData := []interface{}{
+		map[string]interface{}{"device": "aa", "age": 5.0, "score": 100, "Ts": baseTime},
+		map[string]interface{}{"device": "aa", "age": 10.0, "score": 200, "Ts": baseTime.Add(1 * time.Second)},
+		map[string]interface{}{"device": "bb", "age": 3.0, "score": 300, "Ts": baseTime},
+	}
+
+	for _, data := range testData {
+		strm.AddData(data)
+	}
+	// 捕获结果
+	resultChan := make(chan interface{})
+	strm.AddSink(func(result interface{}) {
+		resultChan <- result
+	})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 4*time.Second)
+	defer cancel()
+
+	var actual interface{}
+	select {
+	case actual = <-resultChan:
+		cancel()
+	case <-ctx.Done():
+		t.Fatal("Timeout waiting for results")
+	}
+
+	expected := []map[string]interface{}{
+		{
+			"max_age":   10.0,
+			"min_score": 100.0,
+			"start":     baseTime.UnixNano(),
+			"end":       baseTime.Add(2 * time.Second).UnixNano(),
+		},
+	}
+
+	assert.IsType(t, []map[string]interface{}{}, actual)
+	resultSlice, ok := actual.([]map[string]interface{})
+	require.True(t, ok)
+	assert.Len(t, resultSlice, 1)
+	for _, expectedResult := range expected {
+		//found := false
+		for _, resultMap := range resultSlice {
+			assert.InEpsilon(t, expectedResult["max_age"].(float64), resultMap["max_age"].(float64), 0.0001)
+			assert.InEpsilon(t, expectedResult["min_score"].(float64), resultMap["min_score"].(float64), 0.0001)
+			assert.Equal(t, expectedResult["start"].(int64), resultMap["start"].(int64))
+			assert.Equal(t, expectedResult["end"].(int64), resultMap["end"].(int64))
+		}
+		//assert.True(t, found, fmt.Sprintf("Expected result for device %v not found", expectedResult["device"]))
+	}
+}