[IOTDB-6325] Support RegionScan for active metadata queries [FE Part] #12446
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# Conflicts: # iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/distribution/ExchangeNodeAdder.java # iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/distribution/SourceRewriter.java # iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/PlanNodeType.java # iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/PlanVisitor.java
JackieTien97
requested changes
May 9, 2024
...core/datanode/src/main/java/org/apache/iotdb/db/queryengine/common/TimeseriesSchemaInfo.java
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...tanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/schema/ISchemaFetcher.java
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iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/parser/ASTVisitor.java
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iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/parser/ASTVisitor.java
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.../main/java/org/apache/iotdb/db/queryengine/plan/statement/metadata/ShowDevicesStatement.java
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.../src/main/java/org/apache/iotdb/db/queryengine/plan/planner/distribution/SourceRewriter.java
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.../src/main/java/org/apache/iotdb/db/queryengine/plan/planner/distribution/SourceRewriter.java
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.../main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/source/RegionScanNode.java
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...core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/AnalyzeVisitor.java
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...core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/AnalyzeVisitor.java
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1. use countStatemet 2. modify the attribute in RegionScanNode 3. Optimize the logic of SourceRewriter 4. Optimize the process of analyzing
JackieTien97
requested changes
May 11, 2024
.../org/apache/iotdb/db/queryengine/plan/planner/plan/node/source/TimeseriesRegionScanNode.java
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.../org/apache/iotdb/db/queryengine/plan/planner/plan/node/source/TimeseriesRegionScanNode.java
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.../org/apache/iotdb/db/queryengine/plan/planner/plan/node/source/TimeseriesRegionScanNode.java
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JackieTien97
approved these changes
May 13, 2024
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If we want to find the metaData which is activate during a period of time, we need to scan the raw data.
Current implementation of seriesScan may cause random access due to the access to one TSFile repeatedly. We could use file scan to eliminate this.
Region scan is the feature in IoTDB to support fileScan, this PR would support activate metadata query through region-scan, optimizing the performance of full scanning.
requirements docs: https://apache-iotdb.feishu.cn/docx/YqcSdnYbSoJ58zxeK0kcnuSzn8c
design docs: https://apache-iotdb.feishu.cn/docx/ZdeYdBJyRoPtvFxtWHvc6VtCnuc