redesign of updateStandaloneArtwork()

SQL/SQLite/schema_optimize.sql

@@ -3,7 +3,7 @@
 -- This is done here as it is faster to do in sql than in the server.
 --
 
-DELETE FROM scanned_pics;
+--DELETE FROM scanned_pics; ### Removed temporarily for debugging
 
 -- XXX This appears to not be needed anymore as contributors are properly
 -- removed by the new scanner

SQL/SQLite/schema_scanner.sql

@@ -8,8 +8,20 @@ CREATE INDEX scannedUrlIndex ON scanned_files (url);
 
 DROP TABLE IF EXISTS scanned_pics;
 CREATE TABLE scanned_pics (
-  url text NOT NULL,
+  folder text,
+  full_path text NOT NULL,
   timestamp int(10),
-  filesize int(10)
+  filesize int(10),
+  coverid char(8),
+  status char(1) CHECK (status IN ('D', 'E', 'N'))
+  	-- D = image deleted (ie used in the database (tracks.cover) but no longer existing on disk)
+  	-- E = an existing image present in tracks.cover
+  	-- N = a new image (eg on disk but not used in tracks.cover - might actually have been on disk before, but passed over in a previous scan)
+  	-- NULL = we'll set status 'E' to NULL if after n&c music files have been processed the image is still being used.
+ 	--	This improves performance as we'll only process the tracks if there's also a N(ew) image 
 );
-CREATE INDEX scannedPicUrlIndex ON scanned_pics (url);
+CREATE INDEX scannedPicUrlIndex ON scanned_pics (full_path);
+CREATE INDEX scannedPicDirIndex ON scanned_pics (folder);
+create index scannedPicStatusidx on scanned_pics(status);
+
+CREATE INDEX IF NOT EXISTS trackscoveridx ON tracks(cover);

SQL/mysql/schema_optimize.sql

@@ -3,7 +3,7 @@
 -- This is done here as it is faster to do in sql than in the server.
 --
 
-DELETE FROM scanned_pics;
+--DELETE FROM scanned_pics; ### Removed temporarily for debugging
 
 -- XXX This appears to not be needed anymore as contributors are properly
 -- removed by the new scanner

SQL/mysql/schema_scanner.sql

@@ -8,8 +8,20 @@ CREATE INDEX scannedUrlIndex ON scanned_files (url);
 
 DROP TABLE IF EXISTS scanned_pics;
 CREATE TABLE scanned_pics (
-  url text NOT NULL COLLATE NOCASE, -- URL must be case insensitive, or we might duplicate tracks if the filename changes case only (https://github.com/LMS-Community/slimserver/issues/705#issuecomment-1026229542)
+  folder text,
+  full_path text NOT NULL,
   timestamp int(10),
-  filesize int(10)
+  filesize int(10),
+  coverid char(8),
+  status char(1) CHECK (status IN ('D', 'E', 'N'))
+  	-- D = image deleted (ie used in the database (tracks.cover) but no longer existing on disk)
+  	-- E = an existing image present in tracks.cover
+  	-- N = a new image (eg on disk but not used in tracks.cover - might actually have been on disk before, but passed over in a previous scan)
+  	-- NULL = we'll set status 'E' to NULL if after n&c music files have been processed the image is still being used.
+ 	--	This improves performance as we'll only process the tracks if there's also a N(ew) image 
 );
-CREATE INDEX scannedPicUrlIndex ON scanned_pics (url);
+CREATE INDEX scannedPicUrlIndex ON scanned_pics (full_path);
+CREATE INDEX scannedPicDirIndex ON scanned_pics (folder);
+create index scannedPicStatusidx on scanned_pics(status);
+
+CREATE INDEX IF NOT EXISTS trackscoveridx ON tracks(cover);