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Add TODO comment about subquery positions we don't support yet

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This commit is contained in:
Jussi Saurio
2025-10-27 15:54:44 +02:00
parent 8fecd82311
commit bc2a7c79f9
1 changed files with 11 additions and 0 deletions
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11
core/translate/select.rs
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@@ -503,7 +503,18 @@ fn prepare_one_select_plan(
&mut windows,
)?;
}
// TODO: support subqueries in the following positions:
// - result column of a select, e.g.: SELECT x = (SELECT ...) FROM t
// - GROUP BY clause, e.g.: SELECT * FROM t GROUP BY (SELECT ...) <-- however nonsensical that might be...
// - HAVING clause, e.g.: SELECT * FROM t GROUP BY x HAVING x = (SELECT ...)
// - ORDER BY clause, e.g.: SELECT * FROM t ORDER BY x = (SELECT ...)
// - LIMIT clause, e.g.: SELECT * FROM t LIMIT (SELECT ...)
// - OFFSET clause, e.g.: SELECT * FROM t OFFSET (SELECT ...)
//
// in these positions, unlike in the WHERE clause, the subquery cannot reference columns from the outer query,
// so we don't need to collect outer query references.
plan_subqueries_from_where_clause(
program,
&mut plan.non_from_clause_subqueries,