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✨ OUTER JOIN optimization #2447

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joocer opened this issue Feb 21, 2025 · 0 comments

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⚙️ Query Optimizer

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joocer commented Feb 21, 2025

REDUNDANCY RULE

we can rewrite an outer join to an inner join if the query contains a filter that would already reject any null values (which is most filters)

SELECT s.id, p.id FROM $satellites AS s LEFT JOIN $planets AS p ON s.id = p.id WHERE p.id = 5

is the same as

SELECT s.id, p.id FROM $satellites AS s INNER JOIN $planets AS p ON s.id = p.id WHERE p.id = 5

joocer added the ⚙️ Query Optimizer label

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