[26.0] Fix CardinalityViolation in nested collection ARRAY walk scalar subqueries#22123
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mvdbeek merged 1 commit intogalaxyproject:release_26.0from Mar 15, 2026
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…eries Add .limit(1) to correlated scalar subqueries that navigate from leaf elements to ancestors via child_collection_id. When multiple parent DatasetCollectionElements reference the same child collection the subqueries returned more than one row, causing PostgreSQL to raise "more than one row returned by a subquery used as an expression". Fixes galaxyproject#22122
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Add .limit(1) to correlated scalar subqueries that navigate from leaf elements to ancestors via child_collection_id. When multiple parent DatasetCollectionElements reference the same child collection the subqueries returned more than one row, causing PostgreSQL to raise "more than one row returned by a subquery used as an expression".
Fixes #22122
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