[IOTDB-5361] Refactor device and timeseries count based on SchemaReader

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: master branch
• Labels: pull-request-available
• Sprint: 2023-1-Schema
• Assignee: Yukun Zhou
• Reporter: Yukun Zhou
• Created: 05/Jan/23 01:42
• Updated: 05/Jan/23 04:29
• Resolved: 05/Jan/23 04:29

Description

Currently, the DeviceCountOperator and TimeSeriesCountOperator are implemented by invoking SchemaRegion interfaces directly, which is unable to be interrupt and brings burden to SchemaRegion business logic.

Since we want SchemaRegion to only provide the basic SchemaReader, we refactor the implementation of DeviceCountOperator and TimeSeriesCountOperator to extract the counting logic from SchemaRegion. Based on SchemaReader, it is more flexible to interrupt the process and release resources.

Issue Links

• is a child of: IOTDB-3063 SchemaReader for schema query operator
• links to: GitHub Pull Request #8755