hongzhi-gao commented on code in PR #767:
URL: https://github.com/apache/tsfile/pull/767#discussion_r3043166268
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cpp/src/cwrapper/tsfile_cwrapper.h:
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@@ -104,6 +104,97 @@ typedef struct device_schema {
int timeseries_num;
} DeviceSchema;
+/**
+ * @brief Aggregated statistic for one timeseries (subset of C++ Statistic).
+ *
+ * String pointers str_* are allocated with malloc; freed by
+ * tsfile_free_device_timeseries_metadata_map (do not free individually).
+ */
+typedef struct TimeseriesStatistic {
+ bool has_statistic;
+ int32_t row_count;
+ int64_t start_time;
+ int64_t end_time;
+ /** True when @p sum is meaningful (numeric / boolean aggregate types). */
+ bool sum_valid;
+ /** Sum when sum_valid; boolean uses sum of true as int-like aggregate. */
+ double sum;
+
+ /** INT32, DATE, INT64, TIMESTAMP: min/max/first/last in int64_t form. */
+ bool int_range_valid;
+ int64_t min_int64;
+ int64_t max_int64;
+ int64_t first_int64;
+ int64_t last_int64;
+
+ /** FLOAT, DOUBLE: min/max/first/last. */
+ bool float_range_valid;
+ double min_float64;
+ double max_float64;
+ double first_float64;
+ double last_float64;
+
+ /** BOOLEAN: first/last sample values. */
+ bool bool_ext_valid;
+ bool first_bool;
+ bool last_bool;
+
+ /** STRING: min/max lexicographic; TEXT: first/last only (min/max unused).
+ */
+ bool str_ext_valid;
+ char* str_min;
+ char* str_max;
+ char* str_first;
+ char* str_last;
+} TimeseriesStatistic;
Review Comment:
fixed
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