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ed17997449
* test: migrate join tests Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * chore: update test results after rebasing main branch Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: unstable query sort results and natural_join test Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: count(*) with joining Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: unstable query sort results and style Signed-off-by: Dennis Zhuang <killme2008@gmail.com> --------- Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
30 lines
1.2 KiB
SQL
30 lines
1.2 KiB
SQL
-- Migrated from DuckDB test: test/sql/join/inner/test_join_with_nulls.test
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-- Tests JOIN behavior with NULL values
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CREATE TABLE null_left("id" INTEGER, val VARCHAR, ts TIMESTAMP TIME INDEX);
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CREATE TABLE null_right("id" INTEGER, val VARCHAR, ts TIMESTAMP TIME INDEX);
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INSERT INTO null_left VALUES (1, 'A', 1000), (2, NULL, 2000), (NULL, 'C', 3000), (4, 'D', 4000);
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INSERT INTO null_right VALUES (1, 'X', 5000), (NULL, 'Y', 6000), (3, 'Z', 7000), (4, NULL, 8000);
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-- INNER JOIN with NULLs (NULLs don't match)
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SELECT * FROM null_left l INNER JOIN null_right r ON l."id" = r."id" ORDER BY l.ts;
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-- LEFT JOIN with NULLs
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SELECT * FROM null_left l LEFT JOIN null_right r ON l."id" = r."id" ORDER BY l.ts;
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-- JOIN on string columns with NULLs
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SELECT * FROM null_left l INNER JOIN null_right r ON l.val = r.val ORDER BY l.ts;
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-- JOIN with IS NOT DISTINCT FROM (treats NULL=NULL as true)
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SELECT * FROM null_left l INNER JOIN null_right r ON l."id" IS NOT DISTINCT FROM r."id" ORDER BY l.ts;
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-- JOIN with NULL-safe conditions
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SELECT * FROM null_left l INNER JOIN null_right r ON (l."id" = r."id" OR (l."id" IS NULL AND r."id" IS NULL)) ORDER BY l.ts;
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DROP TABLE null_right;
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DROP TABLE null_left;
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