Fixed multiple bugs related to schema

[Caideyipi]

Description

As the title said.

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This PR has:

• been self-reviewed.
  • concurrent read
  • concurrent write
  • concurrent read and write
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods.
• added or updated version, license, or notice information
• added comments explaining the "why" and the intent of the code wherever would not be obvious
  for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold
  for code coverage.
• added integration tests.
• been tested in a test IoTDB cluster.

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Key changed/added classes (or packages if there are too many classes) in this PR

[codecov]

Codecov Report

❌ Patch coverage is 41.93548% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.63%. Comparing base (77fe3e7) to head (964c1f0).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...ngine/plan/analyze/schema/NormalSchemaFetcher.java	0.00%	6 Missing ⚠️
...nal/metadata/fetcher/TableDeviceSchemaFetcher.java	0.00%	4 Missing ⚠️
...gine/plan/analyze/schema/ClusterSchemaFetcher.java	0.00%	3 Missing ⚠️
...persistence/schema/mnode/impl/ConfigTableNode.java	0.00%	1 Missing ⚠️
...metadata/fetcher/cache/TableDeviceSchemaCache.java	0.00%	1 Missing ⚠️
.../relational/sql/ast/RelationalAuthorStatement.java	0.00%	1 Missing ⚠️
...gine/schemaregion/impl/SchemaRegionMemoryImpl.java	0.00%	1 Missing ⚠️
...ache/iotdb/commons/schema/filter/SchemaFilter.java	50.00%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #17405 +/- ##
============================================
- Coverage 39.81% 39.63% -0.18% 
Complexity 312 312 ============================================
Files 5127 5134 +7 Lines 346390 346882 +492 Branches 44120 44188 +68 ============================================
- Hits 137903 137483 -420 - Misses 208487 209399 +912 

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[Copilot]

Pull request overview

This PR addresses multiple schema-related correctness issues across TTL handling, schema plan serialization, schema traversal/iterator lifecycle, relational SQL AST deserialization, and table-device schema caching/invalidation.

Changes:

• Fixes incorrect counters/state resets (e.g., TTL cache count, schema-region statistics, logical view statistics).
• Corrects schema iteration and caching behaviors (unpinning skipped cached nodes, table-device schema fetching/grouping, cache invalidation targeting).
• Resolves various schema/SQL logic bugs (authorization validation, expression deserialization, auto-create filtering, procedure state progression, cached fullPath invalidation).

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/schema/ttl/TTLCache.java	Resets ttlCount on clear() to keep TTL rule counting consistent after cache resets/snapshot loads.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/schema/filter/SchemaFilter.java	Makes filter extraction null-safe to avoid NPEs when traversing filter trees.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/SchemaRegionPlanType.java	Changes the plan-type byte for ALTER_ENCODING_COMPRESSOR to avoid a code collision.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/pbtree/schemafile/WrappedSegment.java	Cleans up segment construction signatures and fixes offset shifting logic in removeRecord.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/pbtree/mnode/iterator/CachedTraverserIterator.java	Ensures skipped pinned nodes are unpinned when filtered out.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/mnode/iterator/MemoryTraverserIterator.java	Implements the new “release skipped node” hook for memory-backed traversal (no-op).
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/mnode/iterator/AbstractTraverserIterator.java	Adds a hook to release resources for skipped nodes during traversal.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/impl/SchemaRegionMemoryImpl.java	Corrects logical view statistics updates to reflect the actual number of created views.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/rescon/MemSchemaRegionStatistics.java	Fixes clear() to actually reset view count and clears table-related statistics maps.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/sql/ast/RelationalAuthorStatement.java	Fixes DROP_ROLE validation to check the role name, not the user name.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/sql/ast/Expression.java	Adds deserialization support for CURRENT_DATABASE and CURRENT_USER expressions.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/metadata/fetcher/TableDeviceSchemaFetcher.java	Fixes table device schema fetcher bugs (method naming, per-row database grouping, cache request class relocation).
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/metadata/fetcher/cache/TableDeviceSchemaCache.java	Fixes column-level invalidation to target the correct (database, table) cache key and annotates table-model API.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/metadata/fetcher/cache/DeviceSchemaRequestCache.java	Moves cache class into the fetcher cache package to match new usage/imports.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/schema/NormalSchemaFetcher.java	Fixes auto-create filtering logic to keep system OR audit series (instead of accidentally requiring both).
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/schema/ClusterSchemaFetcher.java	Same auto-create filtering fix for the clustered schema fetch path.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/table/DeleteDevicesProcedure.java	Fixes procedure state transitions during blacklist construction to avoid incorrect looping.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/persistence/schema/mnode/impl/ConfigTableNode.java	Invalidates cached fullPath when renaming to keep path-derived behavior consistent.

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[Copilot]

Changing ALTER_ENCODING_COMPRESSOR’s planType from 66 to 80 fixes the duplicate-code issue with CREATE_LOGICAL_VIEW(66), but it doesn’t address clusters that may already have WAL/consensus logs containing the legacy value 66 for ALTER_ENCODING_COMPRESSOR: those entries will still be deserialized as CREATE_LOGICAL_VIEW and likely fail recovery. Consider adding backward-compatible deserialization for the legacy encoding (e.g., when code==66, peek the next serialized field to distinguish PlanNodeType.ALTER_ENCODING_COMPRESSOR vs logical-view payload) or otherwise provide an explicit migration/guard to prevent startup failures on upgrade.

[sonarqubecloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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