oap-server/server-query-plugin/promql-plugin/src/main/java/org/apache/skywalking/oap/query/promql/rt/PromOpUtils.java [78:101]:
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                                             MetricsRangeResult matrixRight,
                                             int opType) throws IllegalExpressionException {
        MetricsRangeResult result = new MetricsRangeResult();
        result.setResultType(ParseResultType.METRICS_RANGE);
        result.setRangeExpression(matrixLeft.isRangeExpression());
        for (int i = 0; i < matrixLeft.getMetricDataList().size(); i++) {
            MetricRangeData dataLeft = matrixLeft.getMetricDataList().get(i);
            MetricRangeData dataRight = matrixRight.getMetricDataList().get(i);
            if (!dataLeft.getMetric().getLabels().equals(dataRight.getMetric().getLabels())) {
                throw new IllegalExpressionException(
                    "The metric info result left in conformity with right.");
            }
            if (dataLeft.getValues().size() != dataRight.getValues().size()) {
                throw new IllegalExpressionException(
                    "The metric value range left in conformity with right.");
            }
            MetricRangeData newData = new MetricRangeData();
            result.getMetricDataList().add(newData);
            newData.setMetric(dataLeft.getMetric());
            List<TimeValuePair> newValues = new ArrayList<>();
            newData.setValues(newValues);
            for (int j = 0; j < dataLeft.getValues().size(); j++) {
                double lv = Double.parseDouble(dataLeft.getValues().get(j).getValue());
                double rv = Double.parseDouble(dataRight.getValues().get(j).getValue());
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oap-server/server-query-plugin/promql-plugin/src/main/java/org/apache/skywalking/oap/query/promql/rt/PromOpUtils.java [249:272]:
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                                              MetricsRangeResult matrixRight,
                                              int opType) throws IllegalExpressionException {
        MetricsRangeResult result = new MetricsRangeResult();
        result.setResultType(ParseResultType.METRICS_RANGE);
        result.setRangeExpression(matrixLeft.isRangeExpression());
        for (int i = 0; i < matrixLeft.getMetricDataList().size(); i++) {
            MetricRangeData dataLeft = matrixLeft.getMetricDataList().get(i);
            MetricRangeData dataRight = matrixRight.getMetricDataList().get(i);
            if (!dataLeft.getMetric().getLabels().equals(dataRight.getMetric().getLabels())) {
                throw new IllegalExpressionException(
                    "The metric info result left in conformity with right.");
            }
            if (dataLeft.getValues().size() != dataRight.getValues().size()) {
                throw new IllegalExpressionException(
                    "The metric value range left in conformity with right.");
            }
            MetricRangeData newData = new MetricRangeData();
            result.getMetricDataList().add(newData);
            newData.setMetric(dataLeft.getMetric());
            List<TimeValuePair> newValues = new ArrayList<>();
            newData.setValues(newValues);
            for (int j = 0; j < dataLeft.getValues().size(); j++) {
                double lv = Double.parseDouble(dataLeft.getValues().get(j).getValue());
                double rv = Double.parseDouble(dataRight.getValues().get(j).getValue());
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