add recursive query, dv levels 1-3 #6238

doc/sphinx-guides/source/_static/api/file-parents.sql

@@ -1,7 +1,31 @@
-select fmd.label as filename, dsfv.value as dataset_name, 'N/A' as dataverse_level_1_alias, dsv.releasetime as publication_date
-from filemetadata fmd, datasetversion dsv, datasetfieldvalue dsfv, datasetfield dsf, dvobject dvo
+WITH RECURSIVE tree (id, dtype, owner_id, level, id_path) AS (
+    SELECT  id, dtype, owner_id, -1, ARRAY[id]
+    FROM    dvobject
+    WHERE   owner_id in (select id from dvobject where owner_id is null)
+    AND     dtype='Dataverse'
+
+    UNION ALL
+
+    SELECT  dvo.id, dvo.dtype, dvo.owner_id, t0.level + 1,
+        (CASE dvo.dtype
+        WHEN 'Dataverse' THEN ARRAY_APPEND(t0.id_path, dvo.id)
+        ELSE id_path
+        END)
+    FROM    dvobject dvo
+            INNER JOIN tree t0 ON t0.id = dvo.owner_id
+)
+
+select dvo.id as fileid, fmd.label as filename, dsfv.value as dataset_name, tree.id_path[1] as dataverse_level_1_id, level1dv.alias as dataverse_level_1_alias, level1dv.name as dataverse_level_1_friendly_name, level2dv.id as dataverse_level_2_id, level2dv.alias as dataverse_level_2_alias, level2dv.name as dataverse_level_2_friendly_name, level3dv.id as dataverse_level_3_id, level3dv.alias as dataverse_level_3_alias, level3dv.name as dataverse_level_3_friendly_name, dsv.releasetime as dataset_publication_date, dvo.publicationdate as file_publication_date
+from filemetadata fmd, datasetversion dsv, datasetfieldvalue dsfv, datasetfield dsf, dvobject dvo, dataverse level1dv, tree
+left outer join dataverse level2dv on tree.id_path[2] = level2dv.id
+left outer join dataverse level3dv on tree.id_path[3] = level3dv.id
 where fmd.datasetversion_id = dsv.id
+and tree.id = dvo.id
+and tree.id_path[1] = level1dv.id
 and dsv.id = dsf.datasetversion_id
 and dsf.id = dsfv.datasetfield_id
 and fmd.datafile_id = dvo.id
-and dsf.datasetfieldtype_id=1;
+and dsf.datasetfieldtype_id=1
+and dsv.releasetime is not NULL
+and dvo.publicationdate is not NULL
+order by file_publication_date desc;