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[Draft] Master catalog spi clean 15#65744
morningman wants to merge 34 commits into
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morningman:master-catalog-spi-clean-15

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@morningman morningman commented Jul 17, 2026

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Only for testing #65740

morningman and others added 30 commits July 16, 2026 21:21
This multi-month refactor needs persistent state for progress, decisions,
risks, and cross-session agent handoff. Establishes a file-based tracking
system including dashboard, ADR decision log, deviation log, risk register,
per-stage task files, per-connector tracking, and an agent collaboration
playbook covering context budget / subagent usage / handoff norms. Closes
18 design decisions (D-001..D-018) and registers 14 risks (R-001..R-014).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…T27) (apache#63582)

## Summary

Lands the P0 SPI baseline for the catalog-SPI migration (master plan
§3.1 / RFC §2.1), with zero impact on the already-migrated JDBC + ES
connectors.

- **Batch 0** (commits 1-2): SPI types + fe-core bridges —
`ConnectorMetaInvalidator`, `ConnectorTransaction`,
`ConnectorMvccSnapshot`, `ExternalMetaCacheInvalidator`,
`ConnectorMvccSnapshotAdapter`, `PluginDrivenTransactionManager`
generalization.
- **Batch 1** (commit 3): DDL + Partition SPI —
`ConnectorCreateTableRequest` + 4 spec POJOs, 4 new defaults on
`ConnectorTableOps`, 3 new fields on `ConnectorPartitionInfo`, fe-core
converter, `PluginDrivenExternalCatalog.createTable` routing.
- **Batch 2** (commit 4): Import-gate + unit tests —
`tools/check-connector-imports.sh` wired through exec-maven-plugin;
`FakeConnectorPlugin` covering every default fall-through; routing tests
for the invalidator; converter tests for all 4 partition styles + 2
bucket flavors.

## Commits

- `[feat](connector) add P0 batch 0 SPI baseline: MetaInvalidator /
Transaction / MvccSnapshot` (T03-T08)
- `[feat](connector) wire P0 batch 0 SPI into fe-core` (T09-T12)
- `[feat](connector) add P0 batch 1 SPI: CreateTableRequest +
listPartitions` (T13-T20)
- `[feat](connector) add P0 batch 2 gate + unit tests` (T21-T23,
T26-T27)

## Test plan

- [x] `mvn -pl
fe-connector/fe-connector-api,fe-connector/fe-connector-spi -am compile`
— SPI modules compile
- [x] `mvn -pl fe-core -am compile -Dmaven.build.cache.enabled=false` —
fe-core compile
- [x] `mvn -pl fe-core checkstyle:check` — 0 violations
- [x] `mvn -pl fe-connector validate` — import gate runs and passes
(baseline clean)
- [x] `mvn -pl fe-core -am test
-Dtest='FakeConnectorPluginTest,ExternalMetaCacheInvalidatorTest,CreateTableInfoToConnectorRequestConverterTest,ConnectorPluginManagerTest,ConnectorSessionImplTest'`
— 39/39 green
- [x] `mvn -pl
fe-connector/fe-connector-jdbc,fe-connector/fe-connector-es -am compile`
— downstream connectors compile unchanged
- [ ] JDBC regression-test suite (T24) — to be exercised by this PR's CI
pipeline
- [ ] ES regression-test suite (T25) — to be exercised by this PR's CI
pipeline

## Tracking

Full plan, decisions, and risk log live under `plan-doc/` in the repo
(introduced by 6315983, already on the base branch). Per-task
status: `plan-doc/tasks/P0-spi-foundation.md`.

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…pache#63641)

## Summary

P1 batch A — close out scan-node SPI consolidation while keeping
migration-period fallbacks in place. Three surgical changes route
`PluginDrivenExternalTable` first in the nereids translator hot paths so
already-migrated SPI connectors (JDBC, ES) take the SPI route, while the
existing `instanceof XExternalTable` chains remain as fallbacks for
connectors still pending migration (P3–P7).

- **T3** — `PhysicalPlanTranslator.visitPhysicalFileScan`: move the
existing `PluginDrivenExternalTable` branch from position 8 to position
1; the 7 connector-specific branches (HMS / Iceberg / Paimon / Trino /
MaxCompute / LakeSoul / RemoteDoris) stay in place as migration-period
fallbacks
- **T4** — `PhysicalPlanTranslator.visitPhysicalHudiScan`: add a
`PluginDrivenExternalTable` branch routed to
`PluginDrivenScanNode.create(...)`, threading `tableSnapshot` +
`scanParams` through `FileQueryScanNode` setters; `incrementalRelation`
flagged as a P3 Hudi SPI extension TODO. The new branch is unreachable
today (`PhysicalHudiScan` is only built for `HMSExternalTable +
DLAType.HUDI`), so this is groundwork for P3 with zero current-day
runtime impact
- **T5** — `LogicalFileScan`: in `computeOutput()`, add a
`PluginDrivenExternalTable` branch calling new helper
`computePluginDrivenOutput()` — same shape as `computeIcebergOutput`,
using `getFullSchema()` + virtualColumns; in
`supportPruneNestedColumn()`, add an explicit `PluginDrivenExternalTable
→ false` branch. Both behaviorally equivalent for JDBC/ES today since
they have no hidden cols and no virtualColumns

P1 batch B (T1 — delete 13 legacy `Jdbc*Client` + `JdbcFieldSchema`) is
deferred to P8 because the 3 fe-core callers —
`PostgresResourceValidator`, `StreamingJobUtils`,
`CdcStreamTableValuedFunction` — are live CDC streaming code that
requires SPI extension for `getPrimaryKeys` / `getColumnsFromJdbc` /
`listTables`, which is out of P1 surgical scope.

Background and tracking docs live in `plan-doc/` (Master Plan §3.2 P1,
tasks/P1-scan-node-cleanup.md, decisions log).

## Test plan

- [x] `mvn -pl fe-core -am compile -Dmaven.build.cache.enabled=false` →
BUILD SUCCESS
- [x] `mvn -pl fe-core checkstyle:check` → 0 violations
- [x] JDBC + ES regression-test passing — baseline established in P0 /
PR apache#63582
- [ ] PR CI green on this PR
- [ ] Manual scan-node smoke for an SPI connector — JDBC `SELECT *`
should fall into the new `PluginDrivenExternalTable` branch first

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
…apache#64096)

### What problem does this PR solve?

Related PR: apache#63582 (P0 — SPI baseline), apache#63641 (P1 — nereids
plugin-driven routing)

Problem Summary:

This is **P2** of the catalog SPI migration and targets the
`branch-catalog-spi` feature branch (continuing P0 apache#63582 and P1
apache#63641). It fully migrates `trino-connector` off the legacy in-tree
`fe-core/datasource/trinoconnector/` implementation and onto the
connector SPI module `fe-connector-trino`, making `trino-connector` the
first connector to complete the SPI consumption playbook that later
connectors will reuse as a template.

All five batches land together so there is no intermediate state where a
newly-created trino catalog cannot be serialized.

**Batch A — complete the SPI surface (`fe-connector-trino` only, no
fe-core changes)**
- `TrinoConnectorProvider.validateProperties`: enforce the required
`trino.connector.name` property at `CREATE CATALOG` time (ported from
the legacy `checkProperties`).
- `TrinoDorisConnector.preCreateValidation`: call `ensureInitialized()`
so plugin loading + connector-factory resolution happen at catalog
creation instead of being deferred to the first `SELECT`.
- `TrinoConnectorDorisMetadata.applyFilter` / `applyProjection`: bridge
Trino native filter/projection pushdown, reusing
`TrinoPredicateConverter` to translate a Doris `ConnectorExpression`
into a Trino `TupleDomain`. `remainingFilter` is conservatively returned
as the original expression to match legacy behavior (conjuncts are not
stripped; BE re-evaluates them).

**Batch B — fe-core bridge for image compatibility**
- `GsonUtils`: atomically replace the three legacy `registerSubtype`
entries (`TrinoConnectorExternalCatalog` / `Database` / `Table`) with
`registerCompatibleSubtype` redirects onto the `PluginDrivenExternal*`
hierarchy. This must be atomic — `RuntimeTypeAdapterFactory` rejects
duplicate labels, so keeping both bindings would throw at static init.
Mirrors what ES/JDBC already did.
- `PluginDrivenExternalCatalog.gsonPostProcess`: extract a
`legacyLogTypeToCatalogType()` helper that maps `Type.TRINO_CONNECTOR` →
`"trino-connector"`; the generic `name().toLowerCase()` would otherwise
produce the wrong `"trino_connector"` (underscore) that `CatalogFactory`
does not recognize.
- `PluginDrivenExternalTable.getEngine()` / `getEngineTableTypeName()`:
add `trino-connector` branches that preserve the legacy engine-name /
table-type display across `SHOW TABLE STATUS` and `information_schema`.

**Batch C — flip the switch**
- Add `"trino-connector"` to `CatalogFactory.SPI_READY_TYPES` so catalog
creation routes through the SPI path.

**Batch D — remove legacy code**
- Drop the `instanceof TrinoConnectorExternalTable` scan branch in
`PhysicalPlanTranslator` (the `PluginDrivenExternalTable` SPI branch
already handles it).
- Drop `case "trino-connector"` in `CatalogFactory`.
- Delete `fe-core/datasource/trinoconnector/` (10 files) and the
now-dead legacy `TrinoConnectorPredicateTest`.
- Route the `TRINO_CONNECTOR` db-build case in `ExternalCatalog` to
`PluginDrivenExternalDatabase` (mirrors the migrated JDBC case).
- **Retained for image compatibility**: the
`InitCatalogLog.Type.TRINO_CONNECTOR` and
`TableType.TRINO_CONNECTOR_EXTERNAL_TABLE` enums, the GsonUtils
redirects, and the `MetastoreProperties` trino-connector entry.

**Batch E — tests + tracking docs**
- 29 JUnit 5 unit tests over the plugin-free converters:
- `TrinoPredicateConverterTest` — `ConnectorExpression` pushdown trees →
Trino `TupleDomain` (EQ / range / NE / IN / IS [NOT] NULL / AND / OR,
Slice encoding), plus graceful degradation to `TupleDomain.all()` on
null/unsupported input.
- `TrinoTypeMappingTest` — Trino SPI type → Doris `ConnectorType`
(scalars, decimal precision/scale, timestamp precision clamp,
array/map/struct, unsupported-type failure).
- `TrinoConnectorProviderTest` — `validateProperties` fast-fails when
`trino.connector.name` is missing/empty.
- No Trino plugin/cluster required; plugin-dependent paths remain
covered by the existing `external_table_p0/p2` `trino_connector`
regression suites.
- Sync the migration tracking docs under `plan-doc/` (already carried on
this feature branch since P0).

**Net effect**: 28 files, +1025 / −2681 (~1656 LOC net removed). Old FE
images holding legacy trino catalogs / databases / tables deserialize
onto the `PluginDrivenExternal*` hierarchy through the GsonUtils
string-name redirect, with engine-name display preserved.

**Deferred (follow-ups, not in this PR)**:
- `trino_connector_migration_compat` regression test (old-image
deserialization) — requires a running cluster + Trino plugin + docker,
unavailable in this dev environment; tracked as a CI/cluster follow-up.
- The plugin-install documentation update lives in the `doris-website`
repo and is handled separately.

### Release note

None

### Check List (For Author)

- Test
- [x] Unit Test — 29 new tests in `fe-connector-trino` (predicate
converter / type mapping / property validation).
- [ ] Regression test — existing `trino_connector` suites cover plugin
paths; the new old-image compat regression is deferred to a CI/cluster
follow-up.
    - [ ] Manual test (add detailed scripts or steps below)
    - [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
        - [ ] Previous test can cover this change.
        - [ ] No code files have been changed.
        - [ ] Other reason

- Behavior changed:
- [x] No. Internal routing moves from the legacy fe-core path to the SPI
path; image compatibility, engine-name display, and pushdown semantics
all mirror the legacy behavior. All batches land together, so there is
no serialization-gap window.

- Does this need documentation?
- [x] Yes. The trino-connector plugin-install doc update is a follow-up
in the `doris-website` repo.

### Check List (For Reviewer who merge this PR)

- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
…tch design (hybrid, T02-T08) (apache#64143)

## Proposed changes

testing with apache#64146

P3 of the catalog-SPI migration (base: `branch-catalog-spi`). Migrates
the **hudi** connector following the **hybrid** strategy (D-019): harden
the dormant HMS-over-SPI hudi connector to correctness parity, build a
test baseline, and write the per-table dispatch design — **all behind
the closed gate** (`SPI_READY_TYPES` unchanged).

> ⚠️ **No user-visible behavior change.** The SPI hudi path stays
dormant (gate closed); hudi queries continue to use the legacy
`HMSExternalTable.dlaType=HUDI` path. This PR removes correctness
blockers ahead of the live cutover (deferred to P7 / batch E).

### What's included

**Correctness fixes (hardening dormant code, behind gate):**
- **T02** — fix hudi JNI `column_types` double bug: emit full Hive type
strings (was Doris bare type names, losing precision/scale/subtypes) and
send `column_names`/`column_types`/`delta_logs` as typed lists
end-to-end (was comma join/split, which shattered `decimal(10,2)` /
`struct<...>`). Matches the BE `hudi_jni_reader.cpp` contract (names `,`
/ types `#` / delta `,`).
- **T04** — fail loud on time-travel / incremental read in the SPI
`visitPhysicalHudiScan` branch (was silently returning the latest
snapshot / silently full-scanning).
- **T05** — real EQ/IN partition pruning in
`HudiConnectorMetadata.applyFilter` (was a placeholder that ignored
predicates and unconditionally switched the partition source from
Hudi-metadata to HMS); faithfully mirrors
`HiveConnectorMetadata.applyFilter`.
- **T07** — column-name casing fix in `avroSchemaToColumns` (top-level
lowercase, mirroring legacy `HMSExternalTable`).

**Test baseline (all three connector modules started P3 with 0 tests):**
- `fe-connector-hudi` (33): type-mapping / schema-parity (COW/MOR
golden) / table-type / partition-pruning / scan-range.
- `fe-connector-hms` (12): shared Hive-type-string parser tests.
- `fe-connector-hive` (14): file-format / partition-pruning (mirrors
T05).
- COW/MOR schema is **type-agnostic** (golden parity vs legacy
`initHudiSchema`); table type only affects scan planning.

**Decisions / design (code-grounded, design-only):**
- **T03** — defer `schema_id`/`history_schema_info` field-id evolution
to batch E (DV-006; not a model-agnostic SPI fix).
- **T06** — keep MVCC/snapshot SPI defaults (opt-out) + document
(DV-007).
- **T08** — `tableFormatType` dispatch design memo + **D-020**: single
`hms` catalog per-table routing via a new backward-compatible
`ConnectorMetadata.getScanPlanProvider(handle)` (per-table provider
seam); refines D-005. The keystone gap is split into M1 (identity
consumption, fe-core reads `tableFormatType` as an opaque string) and M2
(scan routing).

### Deferred to batch E / P7 (not in this PR)
Gate flip (`SPI_READY_TYPES += hms/hudi`), fe-core `tableFormatType`
consumption (M1+M2 implementation), live cutover, delete legacy
`datasource/hudi/`, full incremental/time-travel/MVCC, Iceberg-on-hms
via SPI (needs P6 `IcebergScanPlanProvider`), cluster/runtime
validation.

### Verification
Per task tracking, each code batch landed with: per-module compile +
checkstyle 0 (incl. test sources) + connector import-gate pass + new
unit tests green. The two most recent commits are docs-only
(`plan-doc/`); the code is unchanged since the last green batch. Gate
stays closed → the dormant SPI path is unreachable at runtime → zero
live-path risk. CI re-verifies.

🤖 Generated with [Claude Code](https://claude.com/claude-code)
…core + make fe-core odps-free (T07-T09) (apache#64300)

Follow-up to apache#64253 (the MaxCompute catalog-SPI cutover). After the
cutover a `max_compute` catalog deserializes to
`PluginDrivenExternalCatalog` and no legacy `MaxComputeExternal*` object
is ever instantiated, so the legacy MaxCompute subsystem in fe-core is
dead code. This removes it and makes fe-core's dependency tree fully
odps-free.

**1. Remove legacy subsystem** (`7a4db351100`)
- Delete 20 fe-core files: `datasource/maxcompute/*` (incl.
`MCTransaction`, `MaxComputeScanNode`/`Split`), the MaxCompute
sink/insert/txn plumbing, and 2 legacy-only tests.
- Clean ~21 reverse-reference sites (imports + dead
`instanceof`/visitor/rule branches), keeping every
`PluginDriven`/connector sibling branch and the image/replay keep-set
(GsonUtils compat strings;
`TableType`/`TransactionType`/`TableFormatType`/`InitCatalogLog.Type`
`MAX_COMPUTE` enums; block-id thrift).
- Rewire 3 tests; e.g. `FrontendServiceImplTest`'s block-id RPC test now
mocks the generic `Transaction` SPI, since `getMaxComputeBlockIdRange`
reads the PluginDriven connector transaction.

**2. Make fe-core odps-free** (`409300a75b8`)
- Drop the two odps deps from `fe-core/pom.xml`.
- Move `MCUtils` from fe-common into
`be-java-extensions/max-compute-connector` (its only consumer after the
removal); keep `MCProperties` (odps-free constants) in fe-common.
- Drop `odps-sdk-core` from fe-common — it was also leaking
netty/protobuf transitively to fe-common's own
`DorisHttpException`/`GsonUtilsBase`, so declare `netty-all` +
`protobuf-java` directly (proper dependency hygiene).

**3. Doc-sync** (`f8c305765e8`) — plan-doc
PROGRESS/HANDOFF/deviations/design tracking notes.

- `mvn -pl :fe-core -am test-compile` (main+test) passes; checkstyle 0
violations; connector import-gate passes.
- `grep -rn com.aliyun.odps fe/fe-core/src` → empty.
- `mvn -pl :fe-core dependency:tree | grep odps` → empty (no odps,
direct or transitive).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…he#64446) (apache#64446)

Migrates the legacy in-tree Paimon catalog (fe-core `datasource/paimon`,
`metacache/paimon`, `property/metastore/*Paimon*` and their reverse
references) onto the catalog SPI as a self-contained
`fe-connector-paimon`
plugin, following the maxcompute full-adopter + cutover template.
`paimon`
is added to `SPI_READY_TYPES`, so a Paimon catalog now deserializes to
`PluginDrivenExternalCatalog` and all five functional areas —
normal-table
read, system-table read, DDL, MTMV/MVCC/time-travel (procedures are a
doc-only no-op: fe-core has none) — flow through the generic
`PluginDriven*`
bridge with no Paimon-specific branch in fe-core.

Paimon is the first lakehouse full-adopter to exercise the MVCC /
sys-table /
MTMV SPI surfaces, which become the reusable template for the upcoming
iceberg/hudi migrations, so the cutover is held to byte-parity with the
legacy path. The legacy `datasource/paimon/*` classes are left in place
(now
dead on the cutover path) and removed in a follow-up, mirroring the
maxcompute cutover -> P4 removal.

DefaultConnectorContext)

Source-agnostic seams so any connector can express these capabilities;
every
new method is a default no-op/identity, so hive/iceberg/jdbc/maxcompute/
trino/es are byte-for-byte unaffected.

- MVCC/time-travel: `resolveTimeTravel(session, handle,
ConnectorTimeTravelSpec)`
+ `applySnapshot(...)` (threads a pinned snapshot into the handle before
planScan); new immutable `ConnectorTimeTravelSpec` (SNAPSHOT_ID /
TIMESTAMP /
TAG / BRANCH / INCREMENTAL) that fe-core extracts from SQL;
`ConnectorMvccSnapshot`
  carries `schemaId` for schema-evolution-aware time travel.
- System tables: `listSupportedSysTables` / `getSysTableHandle`; fe-core
composes
  the `{base}${sys}` reference name.
- Scan: proportional split-weight
(`getSelfSplitWeight`/`getTargetSplitSize`),
COUNT(*) pushdown (`getPushDownRowCount`, 7-arg `planScan`), native-read
accounting (`isNativeReadRange`), `getDeleteFiles` (VERBOSE
merge-on-read),
`ignorePartitionPruneShortCircuit` (predicate-driven connectors keep
genuine-null
  partitions).
- Metadata: `ConnectorPartitionInfo.fileCount` +
`SUPPORTS_PARTITION_STATS` (rich
SHOW PARTITIONS); `ConnectorColumn.withTimeZone` (WITH_TIMEZONE DESC
marker,
  independent of the timestamp_tz mapping flag); connector cache control
  (`invalidateTable`/`invalidateAll`, `schemaCacheTtlSecondOverride`).
- `ConnectorContext`: six engine-side hooks the connector must not
implement itself
(`loadHiveConfResources`, `vendStorageCredentials`,
`getBackendStorageProperties`,
`normalizeStorageUri` x2, `getStorageProperties`), bound in
`DefaultConnectorContext`
over fe-core's single-source-of-truth credential/URI/HiveConf utilities
(no
  re-ported logic that could drift).

The metastore-side counterpart of the fe-filesystem StorageProperties
SPI: a
Paimon catalog resolves its backend (hive/dlf/rest/jdbc/filesystem) by
ServiceLoader dispatch on `paimon.catalog.type` instead of a fe-core
switch.

- `fe-connector-metastore-api`: hadoop/SDK-free `MetaStoreProperties`
contracts
  (HMS/DLF/REST/JDBC/FileSystem) carrying only Map/scalar facts.
- `fe-connector-metastore-spi`: `MetaStoreProvider<P>` + first-hit
`MetaStoreProviders`
dispatcher + five impls, registered via META-INF/services.
`HmsMetaStorePropertiesImpl`
reproduces the legacy `buildHmsHiveConf` key set and parity-critical
ordering
(storage overlay before the kerberos block; username/sasl last). Adding
a backend =
  one provider class + one services line (no central enum/switch).
- ServiceLoader is loaded with the SPI interface's own (plugin)
classloader, NOT the
thread-context CL: at CREATE CATALOG the static init first fires on an
FE worker
thread whose TCCL is the FE app loader, so a 1-arg load would cache an
empty
  provider list process-wide.
- fe-core bridges add
`initExecutionAuthenticator(List<StorageProperties>)` so
HDFS-Kerberos doAs is wired on the plugin path (legacy
`initializeCatalog` is dead).

Full read + DDL + partitions + statistics + system tables +
MVCC/time-travel across
all five metastore flavors, planning native (ORC/Parquet) vs JNI reads.

- `PaimonCatalogFactory` (pure flavor switch: Options + Hadoop
Configuration + HiveConf,
classloader-pinned for child-first loading), `PaimonCatalogOps`
(injection seam over
the remote Catalog for offline-testable metadata),
`PaimonConnectorMetadata` (~9 -> 28
methods: schema latest/at-snapshot, sys tables, MVCC/time-travel, DDL,
partitions,
  statistics, table descriptor).
- `PaimonScanPlanProvider` (~6 -> 30 methods): predicate/projection
pushdown,
native-vs-JNI routing, large-file sub-splitting with deletion vectors,
COUNT(*)
collapse, schema-evolution field-id dictionary, `$ro` unwrap to base
FileStoreTable.
- New: `PaimonSchemaBuilder` (CREATE TABLE),
`PaimonIncrementalScanParams` (@incr),
`PaimonTableResolver` (sys/branch-aware handle -> Table),
`PaimonLatestSnapshotCache`
+ `PaimonSchemaAtMemo` (per-catalog caches on the long-lived connector).
- `PaimonTypeMapping` gains the write direction (Doris -> Paimon) for
CREATE TABLE.

- NEW `PluginDrivenMvccExternalTable` (generic MvccTable + MTMV host:
the runtime class
for paimon tables), `PluginDrivenMvccSnapshot`,
`PluginDrivenSysExternalTable` +
`systable/PluginDrivenSysTable`. Behavior is selected by
`ConnectorCapability`
(SUPPORTS_MVCC_SNAPSHOT, SUPPORTS_PARTITION_STATS) — no paimon branch in
fe-core.
- `PluginDrivenScanNode`: MVCC pin threaded at every handle-consumption
site, sys-table
time-travel guard, COUNT pushdown, connector-agnostic EXPLAIN
re-emission.
- Cutover: `CatalogFactory` adds `paimon` to `SPI_READY_TYPES` and drops
the built-in
case; `GsonUtils` removes the 7 built-in `Paimon*` subtype registrations
and adds
replay compat so persisted `PaimonExternalCatalog` (all 5 flavors) /
`...Database`
-> `PluginDriven*` and `PaimonExternalTable` ->
`PluginDrivenMvccExternalTable` on
  deserialization (existing clusters upgrade without losing catalogs).
- Nereids/DDL: `PhysicalPlanTranslator` drops the `PaimonScanNode`
branch;
`UserAuthentication`, `CreateTableInfo`, `ShowPartitionsCommand`
generalized;
`Env.getDdlStmt` renders LOCATION/PROPERTIES for SHOW CREATE (paimon
engine, no
  credential leak).

- fe-filesystem: NEW `HdfsFileSystemProperties` / `HdfsConfigFileLoader`
(typed HDFS;
defaults-laden BE map vs defaults-free FE Hadoop-config map so it cannot
clobber a
co-bound object store's fs.s3a.* during a multi-backend merge); S3 MinIO
support +
  legacy tuning defaults; OSS/OBS/COS ANONYMOUS provider-type; new
`FileSystemFactory.bindAllStorageProperties` /
`FileSystemPluginManager.bindAll`.
- NEW `fe-kerberos` leaf module: dependency-free `AuthType` /
`KerberosAuthSpec` facts
  shared across modules without pulling in Hadoop.
- Packaging: NEW `fe-connector-paimon-hive-shade` relocates
`org.apache.thrift` for
HMS 2.3.7; the paimon plugin-zip excludes fe-thrift/libthrift (provided
parent-first)
to avoid a split `TBase` across loaders; self-contained bundle
(hadoop-aws, AWS-SDK,
hadoop-hdfs-client). `paimon.version` (1.3.1) pinned as the single
property across
FE connector / BE paimon-scanner / preload-extensions for FE<->BE
Table/Split serde.
- BE `PaimonJniScanner.getPredicates()` null-predicate backstop
(no-filter scan; pairs
  with the FE producer now always emitting an empty predicate list).

Parity fixes surfaced by the SPI cutover (each restores legacy
semantics):

- Storage/credentials: canonical `s3.*`/`oss.*` keys ->
`fs.s3a.*`/`fs.oss.*`
(STORAGE-CREDS); canonical `AWS_*` BE creds (STATIC-CREDS-BE); per-table
vended
DLF/STS token (REST-VENDED); `oss/cos/obs/s3a` -> `s3://` for data +
deletion-vector
paths (URI-NORMALIZE); external `hive.conf.resources` hive-site.xml
(HMS-CONFRES);
  real doAs on filesystem/jdbc + wrapped HMS read RPCs (KERBEROS-DOAS).
- Reads/types: paimon columns forced nullable (READ-NOTNULL);
`VARCHAR(65533)` not
widened to STRING (VARCHAR-BOUNDARY); dotted `enable.mapping.varbinary`
/
`.timestamp_tz` keys (MAPPING-FLAG-KEYS); per-type partition-value
rendering
(NATIVE-PARTVAL); genuine `\N` not coerced to NULL
(PARTITION-NULL-SENTINEL);
field-id history dict for rename-safe native reads (SCHEMA-EVOLUTION);
paimon-native
  split encode under `enable_paimon_cpp_reader` (CPP-READER).
- Planning/perf: restore the `force_jni_scanner` escape hatch
(FORCE-JNI-SCANNER);
intra-file native sub-splitting (NATIVE-SUBSPLIT); precomputed COUNT(*)
row count
(COUNT-PUSHDOWN); table row count for CBO / SHOW TABLE STATUS
(TABLE-STATS).
- Time travel / DDL: `FOR TIME AS OF` under CST/PST session zones
(TZ-ALIAS); resolved
+ validated `driver_url` for jdbc catalogs (JDBC-DRIVER-URL); reject a
local-only
  name conflict on CREATE TABLE (CREATE-TABLE-LOCAL-CONFLICT).

plan-doc P5 design / task-list / HANDOFF / deviation tracking notes.

- ~70 new FE unit suites: paimon connector (offline recording fakes:
`RecordingPaimonCatalogOps` / `FakePaimonTable`), fe-core PluginDriven*
MVCC /
sys-table / scan-node / split-weight, metastore-spi dispatch +
per-backend
  properties, fe-filesystem HDFS/MinIO/anonymous, fe-kerberos.
- checkstyle 0 violations; connector import-gate passes; FE main+test
compile clean.
- End-to-end paimon behavior is docker-gated (`enablePaimonTest=true`);
the five
functional areas are covered by the `external_table_p0/paimon`
regression suites,
  green on the latest CI run for this branch.
… make fe-core paimon-SDK-free (T29) (apache#64653)

Follow-up to apache#64446 (the Paimon catalog-SPI cutover). After the cutover
a `paimon`
catalog deserializes to `PluginDrivenExternalCatalog` and its tables to
`PluginDrivenMvccExternalTable`, so no legacy `Paimon*` catalog / table
/ scan-node
object is ever instantiated — the entire legacy Paimon subsystem in
fe-core is dead
code. This PR removes it and makes fe-core's dependency tree fully
paimon-SDK-free
(zero `org.apache.paimon` imports, the 5 paimon maven deps dropped).
Mirrors the P4
maxcompute cutover → legacy-removal (apache#64256).

**1. Remove legacy subsystem + sever reverse-refs** (`7632a074e4b`)
- Delete the dead fe-core paimon files: `datasource/paimon/*` (all 5
flavor catalogs,
`PaimonExternalTable`, `PaimonMetadataOps`, `PaimonUtil`,
`source/PaimonScanNode` /
`PaimonSplit` / `PaimonPredicateConverter` / `PaimonSource` /
`PaimonValueConverter`,
`profile/*`), `datasource/metacache/paimon/*`,
`systable/PaimonSysTable`, and the
  legacy-only tests.
- Sever the live reverse-references to the deleted classes, keeping
every `PluginDriven`
/ connector sibling branch and the image/replay keep-set: drop the
`PAIMON` db-creation
switch arm in `ExternalCatalog`; the paimon engine routing in
`ExternalMetaCacheMgr` /
`ExternalMetaCacheRouteResolver`; the dead `PAIMON_EXTERNAL_TABLE`
branch in
`Env.getDdlStmt` (keep the LIVE `PLUGIN_EXTERNAL_TABLE` SHOW CREATE
LOCATION/PROPERTIES
rendering); the `PaimonSysExternalTable` branch in `UserAuthentication`;
the legacy
clauses + `handleShowPaimonTablePartitions()` in `ShowPartitionsCommand`
(keep
`hasPartitionStatsCapability()` and the
`TableType.PAIMON_EXTERNAL_TABLE` enum).
Landed as one compiling unit (mirrors the P4 apache#64300 precedent:
`PaimonUtils` still
  called the removed `ExternalMetaCacheMgr.paimon()`).
- Inline the `getPaimonCatalogType()` string literals
(`hms`/`filesystem`/`dlf`/`rest`/
`jdbc`) to decouple the still-consumed thin metastore-property classes
from the deleted
  `PaimonExternalCatalog`.

**2. Make fe-core paimon-SDK-free** (`32de7d16702`)
- Strip the dead paimon-SDK catalog-building cluster from
`AbstractPaimonProperties` + the
5 flavors (`initializeCatalog` / `buildCatalogOptions` /
`appendCatalogOptions` /
`getMetastoreType` / `normalizeS3Config` / … — 0 live callers; the
plugin path builds
catalogs connector-side). Keep every LIVE SDK-free duty: `warehouse`
`@ConnectorProperty`,
the Kerberos `executionAuthenticator` doAs wiring (read by
`PluginDrivenExternalCatalog`),
property normalization/validation, `getPaimonCatalogType`,
`Type.PAIMON`.
- Vended credentials: delete `PaimonVendedCredentialsProvider` + its
test + the
`VendedCredentialsFactory` `case PAIMON`. Its SDK methods were dead —
reachable only via
the iceberg-only `getStoragePropertiesMapWithVendedCredentials`; the
real paimon vended
path is the connector's `PaimonScanPlanProvider.extractVendedToken`
(moved off fe-core at
cutover). Relocate its one LIVE duty (the REST "skip static storage map"
gate) to a new
SDK-free `MetastoreProperties.isVendedCredentialsEnabled()` (base=false,
`PaimonRestMetaStoreProperties`=true); `CatalogProperty` routes iceberg
through its
provider (byte-identical) and everything else through the
metastore-props method.
- pom: drop `paimon-core` / `-common` / `-format` / `-s3` / `-jindo`
from `fe-core/pom.xml`.
`fe/pom.xml` `paimon.version` is kept (fe-connector-paimon + BE
paimon-scanner still
  consume it).

**3. Doc-sync** (`58160cbcb56`, `895e214b2bd`) — plan-doc HANDOFF /
PROGRESS / connectors /
P5-T29 legacy-removal design tracking notes.

- `mvn -pl :fe-core -am test-compile` (main + test) passes; checkstyle 0
violations;
  connector import-gate (`tools/check-connector-imports.sh`) passes.
- `grep -rn org.apache.paimon fe/fe-core/src` → empty (main and test).
- `mvn -pl :fe-core dependency:tree -Dincludes=org.apache.paimon` →
empty (no paimon dep,
  direct or transitive).
- End-to-end paimon regression (`external_table_p0/paimon`, docker
`enablePaimonTest=true`)
  passed on this branch.
…kerberos (apache#64655)

**P3b: consolidate the drifted Kerberos/Hadoop authentication
implementations into the new top-level neutral leaf module
`fe-kerberos`** as the single source of truth.

Done as 3 commits:

1. **trino → JDK** (`4a740e1`) — replace the only external dependency in
the auth path, trino's `KerberosTicketUtils`, with a JDK-only
(`javax.security.auth.kerberos`) byte-for-byte equivalent, so the
kerberos path is trino-free.
2. **relocate** (`8898e15`) — move the 13 `fe-common`
`security.authentication.*` classes to `org.apache.doris.kerberos.*` in
`fe-kerberos`; retarget all consumer imports (fe-core + 3
be-java-extensions scanners); merge the duplicate `AuthType`.
3. **unify interface** (`5e3e896`) — merge the two competing
`HadoopAuthenticator` interfaces (fe-common's
`PrivilegedExceptionAction` variant vs fe-filesystem-spi's `IOCallable`
variant) into the single fe-kerberos one, and delete
fe-filesystem-hdfs's own
`KerberosHadoopAuthenticator`/`SimpleHadoopAuthenticator` copies (which
had drifted from the canonical impls). `DFSFileSystem` now routes
through the shared authenticators.

`fe-kerberos` remains a top-level neutral leaf (no dependency cycle).

HDFS filesystem access now uses the same authenticators as the HMS path
(restoring parity). Two intentional behavior changes in
fe-filesystem-hdfs: simple / no-`hadoop.username` now runs as remote
user `hadoop` (was: FE process user, direct); kerberos uses the shared
`LoginContext` + 80%-lifetime refresh.

fe-filesystem-hdfs 79/0/0 (+fe-kerberos/spi), checkstyle 0, connector
import-gate clean, whole-repo grep for the removed symbols = 0.

> ⚠️ docker kerberos e2e (HDFS kerberized + HMS) NOT yet run — the real
gate; UGI login can't be exercised in unit tests.
…move legacy fe-core subsystem (apache#64688)

Migrates the legacy in-tree Iceberg catalog (fe-core
`datasource/iceberg`, its
`property/metastore/*Iceberg*` clusters, and every reverse `instanceof
IcebergExternal*` / `case ICEBERG` coupling scattered across nereids /
planner /
alter) onto the catalog SPI as a self-contained `fe-connector-iceberg`
plugin,
following the paimon full-adopter + cutover template. `iceberg` is added
to
`SPI_READY_TYPES`, so an Iceberg catalog now deserializes to
`PluginDrivenExternalCatalog` and every functional area — read, write,
row-level
DML, `ALTER TABLE EXECUTE` procedures, system tables, DDL and
MVCC/time-travel —
flows through the generic `PluginDriven*` bridge with no
Iceberg-specific branch
in fe-core. (Iceberg tables surfaced *through* a `hive`/HMS catalog stay
on the
hive path until P7; this PR covers the dedicated `type=iceberg`
catalog.)

Iceberg is the widest lakehouse adopter migrated so far — 7 catalog
flavors,
merge-on-read row-level DML, 9 stored procedures, v3 row-lineage /
deletion
vectors — so the cutover is held to behavior-parity with the legacy
path. Unlike
the paimon migration (a cutover PR + a separate removal PR), this PR
does the
build-out, the live cutover **and** the full legacy-subsystem removal on
one
branch: fe-core `datasource/iceberg` and its property clusters are
deleted, not
just left dead.

Part of the catalog-SPI migration tracked in apache#65185 (phase **P6**).

Full read + write + row-level DML + procedures + system tables + DDL +
MVCC/time-travel, planning native (Parquet/ORC) vs JNI reads. Key seams:

- `IcebergCatalogFactory` (pure flavor switch, classloader-pinned for
child-first
loading), `IcebergCatalogOps` (metadata / DDL ops),
`IcebergConnectorMetadata`
(schema latest / at-snapshot, sys tables, MVCC/time-travel, DDL,
partitions,
statistics, table descriptor), `IcebergConnectorProvider` (ServiceLoader
entry).
- `IcebergScanPlanProvider` + `IcebergScanRange`: predicate/projection
pushdown
(`IcebergPredicateConverter` → Iceberg `Expression`), FileScanTask
byte-offset
sub-splitting, COUNT(\*) collapse, merge-on-read delete attachment
(position
delete / Puffin DV / equality delete), `IcebergColumnHandle` field-id
column
pruning, schema-evolution-safe reads (`IcebergSchemaUtils` field-id
dictionary),
  synthetic rowid + v3 row-lineage metadata columns.
- Write path: `IcebergWritePlanProvider` / `IcebergWriteContext` /
`IcebergWriterHelper` / `IcebergConnectorTransaction` — INSERT / INSERT
OVERWRITE
(dynamic + static partition), branch-targeted writes, WRITE ORDERED BY,
per-spec
distribution, optimistic-concurrency conflict detection, one SDK
transaction per
  statement, BE commit-fragment → DataFile/DeleteFile conversion.
- Row-level DML: DELETE / UPDATE / MERGE INTO over position-delete (v2)
and
  deletion-vector (v3) merge-on-read, baseSnapshot-anchored read.
- `action/`: the 9 `ALTER TABLE EXECUTE` procedures
(rollback_to_snapshot,
rollback_to_timestamp, set_current_snapshot, cherrypick_snapshot,
fast_forward,
expire_snapshots, publish_changes, rewrite_manifests,
rewrite_data_files)
dispatched by `IcebergExecuteActionFactory`; `rewrite/` hosts the
distributed
  bin-pack `rewrite_data_files` engine.
- `IcebergSchemaBuilder` (CREATE TABLE), `IcebergTypeMapping` (both
directions),
`IcebergColumnChange` / `IcebergComplexTypeDiff` (schema + partition
evolution),
`IcebergLatestSnapshotCache` / `IcebergManifestCache` (per-catalog
caches on the
  long-lived connector), `dlf/` (Aliyun DLF client).

(`fe-connector-metastore-iceberg`)

An Iceberg catalog resolves its backend by `MetaStoreProvider`
ServiceLoader
dispatch on `iceberg.catalog.type` (registered via `META-INF/services`),
instead
of a fe-core switch — **7 flavors**: REST, Hive Metastore, AWS Glue,
Hadoop /
filesystem, JDBC, Aliyun DLF, AWS S3Tables. Adding a backend = one
provider class
+ one services line. The connector self-builds the HMS-metastore
Kerberos
authenticator, so metastore auth is owned entirely by the plugin.

- `CatalogFactory` adds `iceberg` to `SPI_READY_TYPES` and drops the
built-in case.
- `GsonUtils` replay-compat: persisted `IcebergExternalCatalog` →
  `PluginDrivenExternalCatalog`, `IcebergExternalDatabase` →
  `PluginDrivenExternalDatabase`, `IcebergExternalTable` →
`PluginDrivenMvccExternalTable` on deserialization, so existing clusters
upgrade
  without losing catalogs (metadata backward-compat invariant).
- Nereids/DDL/alter generalized off the concrete Iceberg types; SHOW
CREATE
renders LOCATION / PARTITION BY / ORDER BY / PROPERTIES via the generic
path
  (iceberg engine name preserved, no credential leak).

Per the 2026-07 architecture decision (fe-core holds **no** property
parsing for
migrated connectors; storage parsing → `fe-filesystem`, metastore
parsing →
`fe-connector`, both plugin-side; the plugin assembles → BE thrift →
hands back to
fe-core), iceberg's property/credential/auth resolution moves entirely
into the
connector:

- Storage credentials bound to `fe-filesystem` on both scan and write
paths (one
source), retiring the second fe-core `StorageProperties.createAll`
parse.
- Vended temporary credentials, `warehouse` → `fs.defaultFS` derivation
(hadoop flavor only, via the neutral `Connector.deriveStorageProperties`
SPI),
  and Kerberos doAs are all connector-owned; the fe-core pre-execution
  authenticator is a no-op for plugin catalogs.
- fe-core's shared static property/metastore helpers are kept alive only
for the
connectors still on the legacy path (Hive / Hudi / LakeSoul /
HMS-iceberg).

Net **−21.7k** lines from fe-core. Removes the 4 dead entity classes
(`IcebergExternalTable` / `IcebergExternalDatabase` /
`IcebergSysExternalTable` /
`IcebergExternalCatalog`), the fe-core Iceberg `MetastoreProperties`
cluster + its
credential helpers, the 5 fe-core Iceberg connectivity probes and the
coordinator
branches, and un-registers the Iceberg property factories (fail-loud on
any stray
call). The now-dead paimon `MetastoreProperties` cluster left behind by
P5 is
swept in the same pass. `GsonUtils` retains only the three string compat
labels
for old-image upgrade.

Parity fixes surfaced by the SPI cutover (each restores legacy
semantics):

- Classloader: TCCL pinned to the plugin classloader at all three loci
where
fe-core crosses into bundled Iceberg (scan call thread, write/DDL/commit
engine
thread via `TcclPinningConnectorContext`, and Iceberg's own
manifest-writer
  worker pool), preventing a duplicate-copy `ClassCastException`.
- Nested schema dictionary field names lowercased so a mixed-case nested
struct
  (e.g. Iceberg `DROP_AND_ADD`) can't crash BE with `std::out_of_range`.
- Session time zone: lazy `ZoneId` resolution tolerant of Doris
CST/PST-style
  aliases in `FOR TIME AS OF` and datetime partition predicates.
- Storage / URI normalization (`oss/cos/obs/s3a` → `s3`), SHOW CREATE
secret
redaction, and `ALTER TABLE EXECUTE ... WHERE` rejection kept at legacy
wording.

- ~68 FE unit test classes: iceberg connector (offline recording fakes
for the
remote Catalog / Table), metastore-iceberg per-flavor dispatch +
properties, and
the fe-core `PluginDriven*` MVCC / sys-table / scan-node / GSON-replay
surfaces;
  many carry mutation checks.
- checkstyle 0 violations; connector import-gate passes (no
`fe-connector-iceberg → fe-core` import); FE main + test compile clean.
- End-to-end iceberg behavior is docker-gated
(`enableIcebergTest=true`); read,
write, row-level DML, procedures, system tables, DDL and time-travel are
covered
by the `external_table_p0/iceberg` (+ `external_table_p2/iceberg`)
regression
  suites.

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…etaspace leak

JdbcConnectorClient cached JDBC-driver classloaders in a ref-counted map that
evicted the entry when refCount reached 0. A JDBC driver self-registers into
the static java.sql.DriverManager on class load, and close() never deregisters
it, so an evicted classloader stays pinned by DriverManager for the life of the
process. Serial CREATE -> DROP -> CREATE churn of the same driver URL therefore
rebuilt a fresh, separately-pinned classloader every cycle, leaking one driver's
worth of Metaspace per cycle.

Live FE evidence (external regression build 986696 OOM): only 4 jdbc catalogs
yet 38 FactoryURLClassLoader instances survived a full GC (jmap -histo:live),
tracking the DriverInfo count -> ~34 leaked, DriverManager-pinned driver
classloaders. FE Metaspace grew 165MB -> 1565MB over the single-concurrency 5.5h
run (multi-concurrency did not OOM: overlapping same-URL catalogs keep
refCount > 0 so the loader was reused instead of evicted-and-rebuilt).

Fix: revert to a keep-alive Map<URL, ClassLoader> (one loader per distinct
driver URL, shared across catalogs, never evicted), mirroring the pre-SPI
fe-core JdbcClient and the pattern IcebergConnector / PaimonConnector already
use. Bounded by the number of distinct driver jars. Adds a regression test
asserting repeated create/recreate cycles for one URL add exactly one cached
classloader.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XKf5EzHW75qzgrXnkoBZcF
…TableTest after rebase

Rebase-integration fix, belongs with P4 (apache#64300 "remove legacy maxcompute
subsystem"); squash into it when finalizing that PR.

Upstream apache#64937 added MaxComputeExternalTableTest as a unit test for the
legacy MaxComputeExternalTable.parsePartitionValues. P4 deletes that class,
but the new test file rode into the rebase base with no modify/delete
conflict and then dangled: fe-core test-compile failed with
"cannot find symbol: MaxComputeExternalTable".

No coverage lost: the new connector's
MaxComputeConnectorMetadata.listPartitionValues already resolves partition
values by name via ODPS PartitionSpec.get(column) (structurally immune to
the out-of-order/invalid-spec bug apache#64937 fixed in the legacy path).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…es into SPI connectors

After rebasing branch-catalog-spi onto upstream master (4dfcb4f), an audit
of the 3 upstream commits touching fe-core datasource/ found behaviour that was
dropped when P5/P6 removed the legacy fe-core paimon/iceberg subsystems. Port the
bounded correctness gaps into the new fe-connector SPI code (main + tests):

- apache#65332 (paimon JNI IOManager): PaimonScanPlanProvider.getBackendPaimonOptions
  returned emptyMap() for non-jdbc catalogs, so the three JNI IOManager options
  (paimon.doris.enable_jni_io_manager / .tmp_dir / .impl_class) never reached BE
  and Paimon primary-key merge reads could not spill (OOM risk). Collect the three
  options (strip the "paimon." prefix) before the metastore-type check and forward
  them for all catalog flavours; jdbc-only driver logic stays in the jdbc branch.

- apache#65094 tier1 (build-time correctness): IcebergSchemaBuilder buildPartitionSpec /
  buildSortOrder and PaimonSchemaBuilder primary/partition keys used bare column
  names, so a partition/sort/key referenced with a different case than the (now
  case-preserving) schema column failed the engine's case-sensitive lookup. Add
  case-insensitive resolution back to the canonical column name (iceberg via
  Schema.caseInsensitiveFindField; paimon via a lower->canonical map), mirroring
  upstream getIcebergColumnName / getPaimonColumnNames.

- apache#65094 tier2 (consistency, worse than upstream): PaimonConnectorMetadata
  emitted "partition_columns" with case-preserving keys while column names are
  lowercased, so PluginDrivenExternalTable's case-sensitive byName lookup silently
  dropped mixed-case paimon partition columns (table treated as non-partitioned).
  Lower-case partition_columns with the same bare toLowerCase() the columns use.

Verified: mvn package -pl :fe-connector-paimon -am (95 paimon tests) + iceberg
23 tests, 0 failures. Read-path column-name case preservation (tier3) and the
apache#63068 OIDC session-credential port are tracked separately.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…column-name case on the read path

Align the iceberg + paimon catalog-SPI connectors with upstream apache#65094: external
table top-level column names now keep their remote case on the read path instead
of being lowercased. FE-only (BE untouched): the byte-match invariant "Doris scan
slot name == TSchema top-level TField name" is preserved by flipping BOTH the scan
slot names AND the field-id-dict / current-TSchema top-level names to case-preserving
together, so BE (which matches top-level by field-id) needs no change. Nested struct
children stay as-is (iceberg lowercase for BE StructNode.children.at; paimon
paimon-cased). Reverts tier2's lowercasing of paimon partition_columns (bce28b2)
now that the paimon columns are themselves case-preserving.

iceberg (IcebergConnectorMetadata): partition_columns / getColumnHandles / parseSchema.
iceberg (IcebergPartitionUtils): getIdentityPartitionColumns (path_partition_keys),
getIdentityPartitionInfoMap (scan partition-value map) and generateRawPartition -- the
listPartitions value-map key that PluginDrivenExternalTable.getNameToPartitionItems
looks up by the case-preserved partition_columns remote name; omitting it would
silently drop a mixed-case partition column's value in MTMV / partition pruning.
paimon (PaimonConnectorMetadata): partition_columns / getColumnHandles / mapFields.
paimon (PaimonScanPlanProvider): path_partition_keys / getPartitionInfoMap and the
current (-1) TSchema entry (buildSchemaInfo lowercaseTopLevelNames -> false at the
sole current-schema call site; the historical entries and nested names are unchanged).

Tests: flip the connector tests that pinned mixed-case -> lowercase output to assert
case preservation; add an IcebergSchemaUtils mixed-case byte-match case and an
IcebergPartitionUtils.listPartitions regression pinning the case-preserved
partition-value-map key.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…l DTO + user-session capability

Re-migrate the Iceberg REST OIDC per-user session-credential feature (upstream
apache#63068 / e545f1a, dropped by the 2026-07-09 P6 rebase) onto the catalog SPI.
This is the SPI layer (fe-connector-api):

- ConnectorDelegatedCredential: neutral, immutable DTO carrying a user's
  per-connection OIDC/JWT/SAML token across the fe-core -> connector boundary so
  the connector never imports a fe-core type. The token is connection-scoped and
  in-memory only; toString() redacts it (never edit-logged / persisted / SHOWn).
- ConnectorSession.getDelegatedCredential() (default empty) + getSessionId()
  (default = getQueryId): a connector reads the credential and the stable
  AuthSession key (preserved across FE observer->master forwarding) off the session.
- ConnectorCapability.SUPPORTS_USER_SESSION: gates FE credential injection
  (least-privilege -- a connector that never consumes the token never receives it).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…injection + per-user cache bypass

FE bridge for the Iceberg REST per-user session feature (builds on the SPI DTO):

- ConnectorSessionBuilder.from(ctx): copy the retained per-connection
  DelegatedCredential + sessionId onto the ConnectorSession ONLY when the target
  connector declares SUPPORTS_USER_SESSION (least-privilege); map fe-core
  DelegatedCredential -> neutral ConnectorDelegatedCredential by enum name so an
  added-but-unmapped type fails loud rather than being silently dropped.
- PluginDrivenExternalCatalog.shouldBypassTableNameCache / shouldBypassDbNameCache
  = supportsUserSession() && ctx.hasDelegatedCredential(). Under session=user the
  REST server returns PER-USER metadata, so the shared (catalog+name-keyed, NOT
  user-keyed) db/table-name caches are bypassed to prevent cross-user leakage; a
  session with no credential keeps the shared cache (the fail-closed rejection then
  happens connector-side on the actual read, never by serving/poisoning a shared entry).
- ExternalCatalog/ExternalDatabase: db-level live-path bypass
  (getFilteredDatabaseNames(false)/getDbNullableWithoutCache/matchesLocalDbName),
  still re-appending information_schema+mysql and never mutating the shared
  lowerCaseTo*Name lookup when bypassing (updateLookup=false).

Tests: ConnectorSessionImplTest (capability-gated inject / non-capable skip / no-cred),
PluginDrivenExternalCatalogSessionBypassTest (the bypass decision across capability +
credential + null-context).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…outing (metadata + scan/write/procedure)

Iceberg connector consumer for the per-user REST session feature:

- IcebergConnectorProperties + IcebergRestMetaStoreProperties: iceberg.rest.session
  (none|user) + iceberg.rest.oauth2.delegated-token-mode (access_token|token_exchange)
  + optional session-timeout, with validation (session=user requires
  security.type=oauth2; relax the "oauth2 requires static token/credential" rule for
  user-session, whose identity is the per-request user token).
- IcebergDelegatedCredentialUtils + IcebergSessionCatalogAdapter: bridge the neutral
  ConnectorDelegatedCredential to an iceberg SessionCatalog.SessionContext (access_token
  = verbatim OAuth2 bearer; token_exchange = the typed token-type key) over a SINGLE
  shared RESTSessionCatalog. delegatedCatalog/delegatedViewCatalog fail closed on a
  tokenless session=user request (never borrow a shared identity).
- IcebergConnector: build a RESTSessionCatalog for a session=user REST catalog;
  newCatalogBackedOps(session) routes per-request metadata through the querying user's
  delegated catalog; declare SUPPORTS_USER_SESSION only for that config.
- scan/write/procedure providers take a Function<ConnectorSession, IcebergCatalogOps>
  resolver (connector passes this::newCatalogBackedOps); the legacy ops constructors
  bind a constant s->ops so existing tests/behaviour stay byte-identical. This makes
  SELECT / INSERT-DELETE-MERGE / ALTER TABLE ... EXECUTE run per-user. The write COMMIT
  was already per-user (IcebergConnectorTransaction is opened by beginTransaction over
  the session-aware metadata ops).

Tests: IcebergProviderSessionRoutingTest (each provider resolves ops with the call
session + fail-closed), IcebergSessionCatalogAdapterTest (credential-key mapping per
mode + fail-closed + fromString), IcebergConnectorValidatePropertiesTest (+session
validation). IcebergConnectorTest/IcebergProcedureOpsTest adjusted for the resolver
constructor (reflection reads catalogOpsResolver; a bare-null ctor arg is cast).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…research notes + HANDOFF (Tasks 0-7 DONE)

- Add the authoritative design doc (Trino-aligned, SPI-retargeted) and the
  source-verified research notes (Trino reference + apache#63068 as-built + current SPI).
- HANDOFF: mark Tasks 0-7 DONE with the 3-commit stack (SPI 55c991d / FE
  930e477 / connector a07216e), the clean-room review result (routing
  completeness = zero gaps; cache-leakage = none), and the two follow-ups
  (background log-noise reduction; two minor case/consistency nits).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…essionContextTest (cross-user cache-leakage data-flow)

Closes the one remaining apache#63068 test gap: the DATA-FLOW proof (not just the bypass
decision, which PluginDrivenExternalCatalogSessionBypassTest already pins) that a
session=user catalog serves per-user database metadata LIVE and never through the
shared (catalog+name-keyed, not user-keyed) name cache -- the cross-user leakage
guard (Trino CVE-2026-34214).

Retargeted off the deleted IcebergRestExternalCatalog onto a PluginDrivenExternalCatalog
test subclass: mockStatic(SessionContext.current()) drives the per-token identity, the
catalog overrides the remote listing to return each user's own databases and record the
listing token. Two disjoint per-user results + a live re-list on EVERY read (including a
repeat of an earlier token) prove no user's database set leaks to another and nothing was
served from a shared cache; information_schema+mysql stay visible. apache#63068 asserted this
via a no-token "bootstrap" read, which on this branch fail-closes (a session=user catalog
has no shared identity to bootstrap) -- the per-read live token record is the
architecture-correct equivalent observable.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…a-flow test + Task 0 retained-base verify

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013KKXx3btbQc6w3MbZbEoRf
…er rebase to 4f48ccf

Rebase branch-catalog-spi onto upstream-apache/master (10 upstream commits,
21 local commits replayed). Two files were touched by both sides; both are
paimon + apache#65365 fallout:

1. Legacy fe-core PaimonScanNode.java: modify/delete conflict — upstream
   apache#65365 added "jni.enable_file_reader_async" to its BACKEND_PAIMON_OPTIONS
   forwarding list, while P5 (T29) deleted the whole legacy fe-core paimon
   subsystem. Resolution keeps the deletion and ports the new key to the
   connector-side mirror list PaimonScanPlanProvider.BACKEND_PAIMON_JNI_OPTIONS
   (+ intent test): the SPI path is the only forwarding path left, so without
   the port the new catalog property would silently never reach BE's
   PaimonJniScanner.

2. PaimonJniScanner.java: silent semantic conflict — apache#65365 removed the
   then-unused java.util.Collections import upstream, while this branch's
   null-predicate backstop uses Collections.emptyList(). git auto-merged the
   non-overlapping hunks without complaint, breaking compilation. Restore the
   import.

Verified: fe-connector-paimon package GREEN (PaimonScanPlanProviderTest 65/0
incl. new backendOptionsForwardFileReaderAsyncOptOut); paimon-scanner
Paimon* tests 11/0; full build.sh --fe BUILD SUCCESS (build cache disabled).
Pre-existing local-env JVM crash in java-common JniScannerTest
(StubRoutines::jbyte_disjoint_arraycopy_avx3, byte-identical module before and
after rebase) is unrelated and left as-is.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…hade

Under a parallel reactor (build.sh's default -T 1C), the package-phase maven-shade-plugin goal can start before this no-source module's main jar is created and attached, failing with "Failed to create shaded artifact, project main artifact does not exist". build.sh's single-threaded retry regex does not match this error string, so it surfaces as BUILD FAILURE instead of auto-retrying.

Pin maven-jar-plugin's default-jar execution to the package phase with forceCreation=true, declared before the shade plugin, so the module's main artifact is guaranteed present before shade runs -- eliminating the race while keeping -T parallelism (no fallback to single-threaded).

Verified: bash build.sh --fe --clean (default -T 1C, all 61 modules) BUILD SUCCESS, the race error did not recur, jar:jar (default-jar) runs before shade:shade, and the shaded-jar relocation output is unchanged (the diff is jar-plugin-only).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…on_deletes connector gap as flip blocker

Rebase: 23 upstream commits / 23 ours replayed, behind0/ahead23. All 5 conflicts
came from a single upstream commit 0814e49 (apache#65135, iceberg $position_deletes
system table), which lands in fe-core code P6 deleted/migrated to the connector SPI.

Records the per-file adjudication, the two hazards git did not flag as conflicts
(IcebergScanNodeTest hard-depends on a method the P6 side removes; the groovy
suite's auto-merged out-of-hunk lines), and the resulting flip blocker: the iceberg
connector does not expose position_deletes, so the feature is absent vs upstream
master while its ~1200 lines of BE readers land orphaned. Two p0 suites are
intentionally left red rather than editing the tests to hide the gap.

Verified: FE_MAVEN_THREADS=1 -Dmaven.build.cache.enabled=false bash build.sh --fe
= BUILD SUCCESS, 61 modules, 0 checkstyle violations.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…+ design (T0 evidence in, ready to implement)

Research (workflow wf_583cf18a-7ae, 5 lenses) + T0 empirical prerequisites
(workflow wf_2f84859d-a52, 3 checks that actually compiled and ran code).

T0 falsified two design assumptions, both now recorded:
- Jackson vs Gson: Float/Double are byte-identical (the suspected risk did not
  reproduce); BigDecimal differs in BOTH directions (1.50 -> 1.5, and 10 -> 1E+1,
  a syntax change). Root cause is JsonNodeFactory bigDecimalExact=false under
  valueToTree, not the writer. Fix: a hoisted mapper copy with
  withExactBigDecimals(true) -- never mutate iceberg's shared JsonUtil.mapper().
- partition_data_json is NOT parsed as JSON: it is fed to Doris's STRUCT text
  serde, and DataTypeNullableSerDe::from_string swallows every parse error into a
  NULL partition while returning OK. A wrong shape is silent wrong data, not an
  error. The connector's existing renderer emits a JSON array and would hit this.

Also found a blocker-shaped gap: [D-065] skips the schema-evolution dict for all
sys handles on the rationale that the metadata-table schema rides inside the
serialized FileScanTask -- true only for the JNI path. position_deletes is the
first sys table reaching a native BE reader, which needs history_schema_info to
resolve the `row` column (v1 hard-errors, v2 silently degrades to name matching).

Design decisions: D1 smooth-upgrade guard NOT ported (user ruling: implement the
final form, no compat) => fe-core and SPI both unchanged, the port is entirely
connector-local. D2 third range shape on IcebergScanRange. D3/D5/D6 per T0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
… design (T0 evidence in)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…ble on the connector SPI

Ports upstream apache#65135 (0814e49) onto this branch's connector SPI. Upstream
implemented $position_deletes in the fe-core iceberg subsystem that P6 deleted, so
after the rebase the BE readers, the thrift contract and the two regression suites
were present while no FE ever produced the ranges -- the feature was absent vs
master and its ~1200 lines of BE C++ were orphaned.

fe-core and the SPI are UNCHANGED: the smooth-upgrade backend guard is deliberately
not ported (user ruling: implement the final form), which was the only piece needing
engine-side state. Everything lands inside fe-connector-iceberg.

- IcebergConnectorMetadata: expose position_deletes (drop the two Q2-era filters).
  The exclusion mirrored legacy's "not supported yet"; apache#65135 invalidated that premise.
- IcebergScanRange: a THIRD range shape. BE routes into its native reader only on
  top-level TIcebergFileDesc.content in {1,3} + a PARQUET/ORC range format, and asserts
  exactly one delete descriptor. The data path must therefore never set top-level
  content to 1 or 3 -- now a load-bearing invariant.
- IcebergPartitionUtils: getPartitionDataObjectJson, a SECOND renderer. The existing
  one emits a JSON array of strings; this path needs a type-native object keyed by the
  metadata table's partition field NAMES resolved by iceberg field ID. Values ride a
  mapper copy with withExactBigDecimals(true): stock Jackson renders BigDecimal("10")
  as 1E+1, a JSON syntax change vs legacy Gson (verified empirically).
- IcebergScanPlanProvider: the planning branch (newBatchScan -- PositionDeletesTable
  .newScan() throws -- pin, predicate, split sizing, PUFFIN-vs-parquet/orc, AVRO fails
  loud), and a narrowed [D-065] gate: every other sys table's schema rides inside the
  serialized FileScanTask, but this one reads natively and BE needs history_schema_info
  to resolve `row` (v1 hard-errors, v2 silently degrades to name matching).

Two defects found by adversarial review and fixed here: the dict branch called
resolveSysTable, which carries no auth wrap by contract and would have failed a
kerberized catalog at plan time (now built from the already-loaded base table, also
saving a round-trip); and the shared split-size heuristic summed fileSizeInBytes,
which over-counts puffin DVs ~N-fold (now ScanTaskUtil.contentSizeInBytes, byte-equal
for data files -- the comment claiming iceberg 1.10.1 lacks that method was false).

Verified: connector suite 977/977 (+11 new), 0 checkstyle violations, and
FE_MAVEN_THREADS=1 -Dmaven.build.cache.enabled=false bash build.sh --fe = BUILD
SUCCESS, 61 modules. The two p0 regression suites are NOT run -- no local iceberg
REST+MinIO+Spark env; they remain the flip gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…remaining flip gate

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Refs apache#65185.

Part of **P7 — hive (+HMS)** in the Catalog SPI migration tracking
issue.

This PR starts the hive/HMS connector migration on `branch-catalog-spi`,
covering the HMS metadata path, metastore-event pipeline, ACID
transaction write path, and the hudi live cutover dependency tracked in
P7.

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
… a slim HMS metastore-client shade (apache#65721)

## Proposed changes

Part of the catalog SPI migration umbrella: apache#65185.

The `fe/fe-connector` closure depended on
`org.apache.doris:hive-catalog-shade`, a ~122 MB "kitchen-sink" shade
whose Hive metastore-client content is under 2% of its bytes (the rest
is a full Hadoop, the paimon bundle, an ancient fastutil, DLF, etc.).
This PR replaces it, for the fe-connector modules, with a new
plugin-private slim shade `fe-connector-hms-hive-shade` (~15 MB) that
bundles **only** the Hive metastore-**client** closure and relocates
`org.apache.thrift` to `shade.doris.hive.org.apache.thrift`, mirroring
the existing `fe-connector-paimon-hive-shade`.

### What changed
- **New module `fe-connector-hms-hive-shade`**:
hive-standalone-metastore (api + client), hive-common (`HiveConf`),
hive-serde, hive-storage-api, iceberg-hive-metastore (`HiveCatalog`),
libthrift/libfb303 0.9.3, codehaus jackson 1.9.2 (HMS JSON event
messaging) and commons-lang 2.x (`HiveConf`). It uses an artifactSet
`<includes>` **whitelist** so the hadoop-yarn/curator/jersey/kerby tail
dragged in by hive-shims stays out; hadoop-common and guava/slf4j/log4j
come from each plugin's own deps / the host at runtime. The thrift
relocation **reuses** the existing `shade.doris.hive` prefix, so the
vendored patch `HiveMetaStoreClient` in `fe-connector-hms` needs no
source change.
- **`fe-connector-hms`** now depends on the slim shade (compile,
transitive to hive/hudi/iceberg) instead of the fat shade; the patch
client stays in place.
- **`fe-connector-iceberg`** drops its direct fat-shade dependency in
the **same commit** (the hms-flavor `HiveCatalog` now arrives
transitively via the slim shade), so iceberg is never left with two
`HiveCatalog` copies; adds `iceberg-bundled-guava` at compile scope for
the vendored `DeleteFileIndex`.
- **`fe/pom.xml`** keeps the `hive-catalog-shade` version pin (still
used by `be-java-extensions`) with an explanatory comment; stale
comments in the iceberg/hudi poms are corrected.

### Size impact
The shade artifact drops **122 MB → 15 MB** (to ~12% of its size). Each
of the hive / hudi / iceberg plugins bundles its own copy, so each
deployed plugin shrinks by **~107 MB** (~322 MB across the three).

### Verification
- `fe-connector-hms` / `-hive` / `-hudi` / `-iceberg` build + unit tests
green (197 test classes, 0 failures, checkstyle 0).
- `dependency:tree` across all 19 fe-connector modules shows no
`hive-catalog-shade`.
- The three assembled plugin zips contain the slim shade once, no fat
shade, no original-package libthrift, and exactly one copy each of the
metastore-api `Table` / `HiveConf` / iceberg `HiveCatalog` / relocated
thrift; the metastore and `iceberg.hive` bytecode is md5-identical to
the fat shade.
- **Remaining gate**: heterogeneous-HMS e2e (hive read/write,
iceberg-on-HMS INSERT/DELETE/MERGE, hudi-on-HMS read; TCCL / filter-hook
/ kerberos paths) — to be exercised by CI / a follow-up.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01AkwFY4c7kZkLKZeazy3UMW

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
morningman and others added 4 commits July 16, 2026 23:14
…cache cluster (apache#65734)

Issue apache#65185

The fs/ DirectoryLister family is unused dead code ported from Trino's
trino-hive fs package. Removed:
  - DirectoryLister
  - FileSystemDirectoryLister
  - TransactionScopeCachingDirectoryLister
  - TransactionScopeCachingDirectoryListerFactory
  - TransactionDirectoryListingCacheKey
  - TransactionScopeCachingDirectoryListerTest

No production code instantiates any of them (no `new`, no
ServiceLoader/reflection, no SPI descriptor); the only construction site
was the factory's own unit test. The live directory-listing path is
fe-connector-hive's own nested HiveFileListingCache.DirectoryLister
(signature (location, fs), no catalog.TableIf coupling), which
supersedes this cluster.

Removing it shrinks fe-core with no behavioral change.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…eprecated LakeSoul catalog, and odbc/statistics stubs (apache#65736)

### What problem does this PR solve?

Issue Number: apache#65185

Problem Summary:

Removes four stranded pieces of fe-core datasource code left behind by
the catalog-SPI migration. No user-facing behavioral change; fe-core
only shrinks (12 files deleted, 4 edited, -2503/+50 lines).

1. **`datasource/odbc/` (`OdbcTableSink`, `OdbcScanNode`) and
`datasource/statistics/CommonStatistics`** — `@Deprecated` throw-only
stubs / a JDK-only helper with zero references. `CommonStatistics` was
superseded by the connector-side `HmsCommonStatistics`.

2. **`datasource/operations/ExternalMetadataOps` +
`transaction/AbstractExternalTransactionManager`** — fully dead.
`ExternalCatalog.metadataOps` is never assigned anywhere (always
`null`), there are zero implementations of the interface, and
`AbstractExternalTransactionManager` is never subclassed. Every DDL
delegation in `ExternalCatalog` therefore always took the `metadataOps
== null` path, so this is dead-branch elimination: master DDL methods
now throw the same `"... is not supported for catalog"` unconditionally;
replay methods keep only their plugin-cache branch. Also removed the
field, `getMetadataOps()` (0 callers), the now-unused
`logRefreshExternalTable` helper, and the orphaned imports.

3. **`datasource/lakesoul/`** (deprecated; `CatalogFactory` already
rejects creating one) — removed the 6 fe-core classes +
`LakeSoulPredicateTest`. Old images / edit-logs stay loadable: the three
`GsonUtils` `registerSubtype(LakeSoulExternal*)` become
`registerCompatibleSubtype(PluginDrivenExternal*)` (matching how ES /
JDBC / HMS / Iceberg / ... were remapped), `buildDbForInit` `case
LAKESOUL` now builds a `PluginDrivenExternalDatabase`, and
`PhysicalPlanTranslator` drops the `LakeSoulExternalTable` branch. The
persisted enum constants
(`InitCatalogLog`/`InitDatabaseLog.Type.LAKESOUL`,
`TableType.LAKESOUl_EXTERNAL_TABLE`, `TableFormatType.LAKESOUL`) are
retained for old-log ordinal compatibility.

Verification: `fe-core` main + test sources compile and checkstyle
passes (`mvn -pl fe-core -am test-compile` → BUILD SUCCESS).
…d by the SPI migration

Delete six unreferenced classes left behind by the catalog-SPI migration,
verified to have zero production references anywhere in fe/ (no imports,
implementors, reflection, GSON/editlog registration, or type-string routing):

- DatabaseMetadata / TableMetadata: interfaces superseded by fe-connector-api's
  ConnectorDatabaseMetadata; their fe-core implementors were already removed.
- DorisTypeVisitor: iceberg type-visitor with no subclasses or call sites.
- ExternalUtil (+ ExternalUtilTest): schema helper whose only callers were the
  now-deleted legacy Iceberg/Paimon scan nodes.
- FileSplitStrategy: never-wired stub (TODO from apache#31047).
- EmptyMvccSnapshot: unused MvccSnapshot impl; interface stays alive via others.

fe-core test-compile passes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AkwFY4c7kZkLKZeazy3UMW
…ages (scan/split/converter/plugin/log/mvcc)

Move 40 loose top-level classes out of the datasource/ package root into
cohesive subpackages, shrinking the root from 61 to 21 files:
- scan/                 : File*/ScanNode file-scan framework + PluginDrivenScanNode
- split/                : Split*/FileSplit split model + PluginDrivenSplit
- connector/converter/  : Nereids<->connector expression/type/column converters
- plugin/               : PluginDriven* SPI bridge classes
- log/                  : editlog record classes (CatalogLog/InitCatalogLog/...)
- mvcc/                 : relocate PluginDrivenMvcc* next to the MvccSnapshot interface

Mechanical package move: FQN-rewrite all imports across fe/, add the same-package
imports the split newly requires, and keep GSON polymorphic registration by
getSimpleName() intact so editlog/image replay is unaffected (only the imports in
GsonUtils/JournalEntity/EditLog change). 48 white-box tests are moved to mirror
their subject's new package so package-private/protected test access still works.

Two small consequences of the split:
- PluginDrivenExternalTable#resolveConnectorTableHandle (and its
  PluginDrivenSysExternalTable override) widened protected -> public, now that
  PluginDrivenScanNode calls it across the scan/plugin package boundary.
- PluginDrivenMvccTableFactoryTest injects ExternalTable's protected fields
  reflectively instead of by direct assignment (ExternalTable stays in the root
  package and must not widen its fields for a test).

fe-core test-compile and checkstyle:check both pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AkwFY4c7kZkLKZeazy3UMW
@hello-stephen

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Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR.

Please clearly describe your PR:

  1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
  2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
  3. What features were added. Why was this function added?
  4. Which code was refactored and why was this part of the code refactored?
  5. Which functions were optimized and what is the difference before and after the optimization?

@morningman

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run buildall

@hello-stephen

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FE UT Coverage Report

Increment line coverage 48.09% (3298/6858) 🎉
Increment coverage report
Complete coverage report

@hello-stephen

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BE UT Coverage Report

Increment line coverage 🎉

Increment coverage report
Complete coverage report

Category Coverage
Function Coverage 57.42% (23929/41672)
Line Coverage 41.17% (235372/571735)
Region Coverage 36.99% (185947/502702)
Branch Coverage 38.15% (83406/218653)

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2 participants