feat(btree): refactor GlobalIndexScan & add inte test for btree global index by lszskye · Pull Request #262 · alibaba/paimon-cpp

lszskye · 2026-05-06T02:02:43Z

Purpose

Linked issue: #38

Introduce:

OffsetGlobalIndexReader: wraps any GlobalIndexReader and rewrites
the row ids in its results by adding a fixed offset. This is how local
row ids become global row ids.
UnionGlobalIndexReader: wraps a list of GlobalIndexReaders and
unions their results via GlobalIndexResult::Or. It can run sub-readers
in parallel through an Executor, or sequentially when no executor is
given.

Add inte test for btree global index

Tests

GlobalIndexTest

…l index

lxy-9602 · 2026-05-06T03:23:12Z

+    auto offset_reader = std::make_shared<OffsetGlobalIndexReader>(fake_reader, 10);
+    // FakeGlobalIndexReader returns error for VectorSearch
+    ASSERT_NOK_WITH_MSG(offset_reader->VisitVectorSearch(nullptr),
+                        "FakeGlobalIndexReader does not support vector search");


Test vector search in OffsetGlobalIndexReaderTest, as it has different logic.
Also test for nullptr inner result.

lxy-9602 · 2026-05-06T03:44:27Z

+    ASSERT_OK_AND_ASSIGN(auto result, union_reader.VisitVectorSearch(nullptr));
+    ASSERT_FALSE(result);
+}
+


add normal case for vector search.

lxy-9602 · 2026-05-06T05:03:37Z

+        }
+        // TODO(lisizhuo.lsz): add executor in UnionGlobalIndexReader
+        readers.push_back(std::make_shared<UnionGlobalIndexReader>(std::move(union_readers),
+                                                                   /*executor=*/nullptr));


Add executor for UnionGlobalIndexReader. May add param in GlobalIndexScan::Create().

feat(btree): refactor GlobalIndexScan & add inte test for btree globa…

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