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Alexey MilovidovandClaude Opus 4.6
8f437e957d
Test exercises the case from #55653 where the index expression type (UInt64 from `mortonDecode`) differs from the query condition type (UInt16 alias), causing a CAST in the monotonic function chain that is evaluated per-granule. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
29 lines
1.2 KiB
XML
29 lines
1.2 KiB
XML
<test>
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<!-- Performance test for minmax skip index evaluation with type casts.
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When the index expression type differs from the query condition type
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(e.g., UInt64 index vs UInt16 alias), a CAST ends up in the monotonic
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function chain. This test verifies that the per-granule evaluation
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of such conditions is efficient.
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See https://github.com/ClickHouse/ClickHouse/issues/55653 -->
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<create_query>
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CREATE TABLE index_test_cast
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(
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z UInt32,
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x UInt16 ALIAS mortonDecode(2, z).1,
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y UInt16 ALIAS mortonDecode(2, z).2,
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INDEX i_x (mortonDecode(2, z).1) TYPE minmax,
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INDEX i_y (mortonDecode(2, z).2) TYPE minmax
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) ENGINE = MergeTree ORDER BY z
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</create_query>
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<fill_query>INSERT INTO index_test_cast SELECT number * 5 FROM numbers_mt(toUInt64(0x100000000 / 5)) SETTINGS max_insert_threads=8</fill_query>
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<fill_query>OPTIMIZE TABLE index_test_cast FINAL</fill_query>
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<query><![CDATA[
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SELECT count() FROM index_test_cast WHERE x >= 20000 AND x <= 20100 AND y >= 10000 AND y <= 10100
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]]></query>
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<drop_query>DROP TABLE IF EXISTS index_test_cast</drop_query>
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</test>
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