+_add_missing_source_checksums_query = R"""
+INSERT INTO source_metadata
+ (src_id, key_id, value)
+SELECT
+ s.id,
+ :checksum_key,
+ E'\n' ||
+ (SELECT STRING_AGG(' ' || tmp.checksum || ' ' || tmp.size || ' ' || tmp.basename, E'\n' ORDER BY tmp.basename)
+ FROM
+ (SELECT
+ CASE :checksum_type
+ WHEN 'Files' THEN f.md5sum
+ WHEN 'Checksums-Sha1' THEN f.sha1sum
+ WHEN 'Checksums-Sha256' THEN f.sha256sum
+ END AS checksum,
+ f.size,
+ SUBSTRING(f.filename FROM E'/([^/]*)\\Z') AS basename
+ FROM files f JOIN dsc_files ON f.id = dsc_files.file
+ WHERE dsc_files.source = s.id AND f.id != s.file
+ ) AS tmp
+ )
+
+ FROM
+ source s
+ WHERE NOT EXISTS (SELECT 1 FROM source_metadata md WHERE md.src_id=s.id AND md.key_id = :checksum_key);
+"""
+