This is an automated email from the ASF dual-hosted git repository. jackietien pushed a commit to branch TyShowTimeSeries in repository https://gitbox.apache.org/repos/asf/incubator-iotdb.git
commit f9c64ec9039ec09ebc2837d348b079670f3df4fc Author: JackieTien97 <[email protected]> AuthorDate: Tue Jul 7 09:46:04 2020 +0800 add some docs --- docs/zh/SystemDesign/SchemaManager/SchemaManager.md | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/docs/zh/SystemDesign/SchemaManager/SchemaManager.md b/docs/zh/SystemDesign/SchemaManager/SchemaManager.md index 7dd5981..832f831 100644 --- a/docs/zh/SystemDesign/SchemaManager/SchemaManager.md +++ b/docs/zh/SystemDesign/SchemaManager/SchemaManager.md @@ -282,4 +282,18 @@ IoTDB 的元数据管理采用目录树的形式，倒数第二层为设备层 ## 元数据查询 -### \ No newline at end of file +### 不带过滤条件的元数据查询 + +主要查询逻辑封装在`MManager`的`showTimeseries(ShowTimeSeriesPlan plan)`方法中 + +* 首先判断需不需要根据热度排序，如果需要，则调用`MTree`的`getAllMeasurementSchemaByHeatOrder`方法，否则调用`getAllMeasurementSchema`方法 + +#### getAllMeasurementSchemaByHeatOrder + +这里的热度是用每个时间序列的`lastTimeStamp`来表征的，所以需要先取出所有满足条件的序列，然后根据`lastTimeStamp`进行排序，然后再做`offset`和`limit`的截断 + +#### getAllMeasurementSchema + +这里需要 + +### 带过滤条件的元数据查询 \ No newline at end of file
