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JunRuiLeeJunRuiLee
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[core] End-to-end tests for snapshot-based sequence ordering
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‎paimon-core/src/test/java/org/apache/paimon/table/PrimaryKeySimpleTableTest.java‎

Lines changed: 197 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2672,4 +2672,201 @@ protected FileStoreTable createFileStoreTable(Consumer<Options> configure, RowTy
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""));
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return new PrimaryKeyFileStoreTable(FileIOFinder.find(tablePath), tablePath, tableSchema);
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}
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@Test
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public void testSnapshotSequenceOrdering() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true));
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StreamTableWrite write = table.newWrite(commitUser);
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StreamTableCommit commit = table.newCommit(commitUser);
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// Snapshot 1: write pk=(1,10) many times so that the per-record sequence number is high.
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for (int i = 0; i < 100; i++) {
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write.write(rowData(1, 10, 999L));
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}
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commit.commit(0, write.prepareCommit(false, 0));
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// Snapshot 2: write pk=(1,10) once with a lower value. Because the snapshot id (2)
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// is larger than snapshot 1, this record should win even though its per-record sequence
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// number is much lower.
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write.write(rowData(1, 10, 1L));
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commit.commit(1, write.prepareCommit(false, 1));
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List<Split> splits = toSplits(table.newSnapshotReader().read().dataSplits());
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, splits, toString);
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assertThat(result).containsExactly("1|10|1");
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write.close();
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commit.close();
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}
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@Test
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public void testSnapshotSequenceOrderingFallsBackToSequenceWithinSnapshot() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true));
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StreamTableWrite write = table.newWrite(commitUser);
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StreamTableCommit commit = table.newCommit(commitUser);
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// Within a single snapshot, sequence number is the tiebreaker. The later write (999)
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// gets a higher sequence number and should win.
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write.write(rowData(1, 10, 1L));
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write.write(rowData(1, 10, 999L));
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commit.commit(0, write.prepareCommit(false, 0));
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List<Split> splits = toSplits(table.newSnapshotReader().read().dataSplits());
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, splits, toString);
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assertThat(result).containsExactly("1|10|999");
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write.close();
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commit.close();
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}
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@Test
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public void testSnapshotSequenceOrderingCompactionPreservesInputSnapshotId() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true));
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StreamTableWrite write = table.newWrite(commitUser);
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StreamTableCommit commit = table.newCommit(commitUser);
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// Snapshot 1: write pk=(1,10) with val=100
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write.write(rowData(1, 10, 100L));
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commit.commit(0, write.prepareCommit(false, 0));
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// Snapshot 2: write pk=(1,10) with val=200 (this should win after compaction)
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write.write(rowData(1, 10, 200L));
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commit.commit(1, write.prepareCommit(false, 1));
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// Snapshot 3: write a DIFFERENT key pk=(1,20) — this creates a concurrent write
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// that arrives between the compaction's base snapshot and its commit.
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write.write(rowData(1, 20, 300L));
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commit.commit(2, write.prepareCommit(false, 2));
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// Snapshot 4: compact (processes files from snapshots 1+2+3)
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write.compact(binaryRow(1), 0, true);
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commit.commit(3, write.prepareCommit(false, 3));
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// Snapshot 5: write pk=(1,10) with val=999 — this is newer than ALL previous writes
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// and MUST win over the compacted result. If compaction incorrectly stamped with
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// snapshot 4, and this write gets snapshot 5, it still wins (5 > 4). But if
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// compaction stamped with max(inputs) = 3, this also wins (5 > 3). So we need a
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// scenario where compaction shadow newer writes.
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//
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// The real test: verify the compacted file's minSequenceNumber is max(inputs), not
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// the compaction commit's snapshotId. We check this via file metadata.
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write.close();
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commit.close();
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List<DataSplit> splits = table.newSnapshotReader().read().dataSplits();
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for (DataSplit split : splits) {
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for (DataFileMeta file : split.dataFiles()) {
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// After compaction, the compacted file should have minSequenceNumber equal
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// to max(input snapshot ids), NOT the compaction commit's snapshot id (4).
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// Input snapshots are 1, 2, 3 → max = 3. Compaction commit is snapshot 4.
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assertThat(file.minSequenceNumber())
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.as(
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"Compacted file %s should have minSequenceNumber <= max(input snapshots), "
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+ "not the compaction commit's snapshot id",
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file.fileName())
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.isLessThanOrEqualTo(3);
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}
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}
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// Also verify the read result is correct
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, toSplits(splits), toString);
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assertThat(result).containsExactlyInAnyOrder("1|10|200", "1|20|300");
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}
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@Test
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public void testSnapshotSequenceOrderingWithChangelogInput() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> {
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conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true);
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conf.set(CHANGELOG_PRODUCER, ChangelogProducer.INPUT);
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});
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StreamTableWrite write = table.newWrite(commitUser);
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StreamTableCommit commit = table.newCommit(commitUser);
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write.write(rowData(1, 10, 100L));
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commit.commit(0, write.prepareCommit(false, 0));
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write.write(rowData(1, 10, 1L));
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commit.commit(1, write.prepareCommit(false, 1));
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List<Split> splits = toSplits(table.newSnapshotReader().read().dataSplits());
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, splits, toString);
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assertThat(result).containsExactly("1|10|1");
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write.close();
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commit.close();
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}
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@Test
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public void testSnapshotSequenceOrderingWithChangelogLookup() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> {
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conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true);
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conf.set(CHANGELOG_PRODUCER, LOOKUP);
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});
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StreamTableWrite write =
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table.newWrite(commitUser).withIOManager(new IOManagerImpl(tempDir.toString()));
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StreamTableCommit commit = table.newCommit(commitUser);
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write.write(rowData(1, 10, 100L));
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commit.commit(0, write.prepareCommit(false, 0));
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write.write(rowData(1, 10, 1L));
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commit.commit(1, write.prepareCommit(false, 1));
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List<Split> splits = toSplits(table.newSnapshotReader().read().dataSplits());
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, splits, toString);
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assertThat(result).containsExactly("1|10|1");
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write.close();
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commit.close();
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}
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@Test
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public void testSnapshotSequenceOrderingDeleteFromLaterSnapshot() throws Exception {
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FileStoreTable table =
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createFileStoreTable(
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conf -> conf.set(CoreOptions.SEQUENCE_SNAPSHOT_ORDERING, true));
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StreamTableWrite write = table.newWrite(commitUser);
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StreamTableCommit commit = table.newCommit(commitUser);
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write.write(rowData(1, 10, 100L));
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commit.commit(0, write.prepareCommit(false, 0));
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write.write(rowDataWithKind(RowKind.DELETE, 1, 10, 100L));
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commit.commit(1, write.prepareCommit(false, 1));
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List<Split> splits = toSplits(table.newSnapshotReader().read().dataSplits());
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TableRead read = table.newReadBuilder().newRead();
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Function<InternalRow, String> toString =
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r -> r.getInt(0) + "|" + r.getInt(1) + "|" + r.getLong(2);
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List<String> result = getResult(read, splits, toString);
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assertThat(result).isEmpty();
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write.close();
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commit.close();
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}
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}

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