[IOTDB-5378] Implement Iterating Query for MTree Node Query #8771
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Cpaulyz
approved these changes
Jan 6, 2023
server/src/main/java/org/apache/iotdb/db/metadata/plan/schemaregion/read/IShowNodesPlan.java
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server/src/main/java/org/apache/iotdb/db/metadata/mtree/MTreeBelowSGCachedImpl.java
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server/src/main/java/org/apache/iotdb/db/metadata/mtree/MTreeBelowSGMemoryImpl.java
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Description
Motivation
The original implementation of MTree node query, including show child nodes/paths and count nodes xxx level=xxx, is based on taking all results via invoking SchemaRegion Interface. Such implementation is not friendly for resource control and process control, and has higher memory peek than iterating query.
Modification