[flink] changelog read support for pk table without pushdown optimizations #2347
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Great! Thank you @MehulBatra , I will review it. |
wuchong
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Jan 18, 2026
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Thanks @MehulBatra for the contribution. I left some comments.
...ss-flink-common/src/test/java/org/apache/fluss/flink/source/ChangelogVirtualTableITCase.java
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...ss-flink-common/src/test/java/org/apache/fluss/flink/source/ChangelogVirtualTableITCase.java
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...ss-flink-common/src/test/java/org/apache/fluss/flink/source/ChangelogVirtualTableITCase.java
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...ss-flink-common/src/test/java/org/apache/fluss/flink/source/ChangelogVirtualTableITCase.java
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...fluss-flink-common/src/main/java/org/apache/fluss/flink/utils/RecordToFlinkRowConverter.java
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fluss-server/src/main/java/org/apache/fluss/server/utils/TableDescriptorValidation.java
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...nk-1.20/src/test/java/org/apache/fluss/flink/source/Flink120ChangelogVirtualTableITCase.java
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...ss-flink-common/src/test/java/org/apache/fluss/flink/source/ChangelogVirtualTableITCase.java
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fluss-flink/fluss-flink-common/src/main/java/org/apache/fluss/flink/catalog/FlinkCatalog.java
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Thank you @wuchong for the extensive feedback, I addressed all of them, please have a look! |
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Purpose
Linked issue: close #2333
Brief change log
File: ChangelogFlinkTableSource.java
Purpose: Flink table source for $changelog virtual tables
────────────────────────────────────────
File: ChangelogDeserializationSchema.java
Purpose: Deserializes LogRecord → RowData with metadata
────────────────────────────────────────
File: ChangelogRowConverter.java
Purpose: Converts records, adds _change_type, _log_offset,
commit_timestamp
────────────────────────────────────────
File: RecordToFlinkRowConverter.java
Purpose: Interface for record converters
────────────────────────────────────────
File: FlinkTableFactory.java
Change: Routes to ChangelogFlinkTableSource for changelog
tables
────────────────────────────────────────
File: TableDescriptor.java
Change: Added CHANGELOG* column name constants
────────────────────────────────────────
File: TableDescriptorValidation.java
Change: Validates reserved column names
Test Coverage
Test: testChangelogVirtualTableSchema
Type: Schema
What it verifies: DESCRIBE shows correct columns
────────────────────────────────────────
File: FlinkCatalog.java
Change: Detects $changelog suffix, builds virtual table
schema
Tests
File: ChangelogVirtualTableITCase.java
Purpose: Integration tests (7 tests)
────────────────────────────────────────
File: ChangelogRowConverterTest.java
Purpose: Unit tests for converter
────────────────────────────────────────
API and Format
Documentation