ANTON KADACH

Generation

text to sql syntaxWed, 18 Jan 2023

Таблицы geo_objects(id, parent_id) geo_object_attributes(geo_objects_id, name) geo_objects связана с таблицей geo_object_attributes geo_objects_id= id запрос, который рекурсивно находит все гео-объекты по дереву и выводит наименование всех гео-объектов дерева в одну строку postgresql

WITH RECURSIVE cte AS ( WITH RECURSIVE tree AS ( SELECT *, ARRAY[]::INTEGER[] AS path FROM geo_objects WHERE id = 1 UNION ALL SELECT o.*, path || o.id FROM geo_objects o JOIN tree ON o.parent_id = tree.id ) SELECT id, path FROM tree WHERE path IS NOT NULL ) SELECT cte.id, geo_object_attributes.name FROM cte LEFT JOIN geo_object_attributes ON cte.id = geo_object_attributes.geo_object_id ORDER BY cte.path;

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