Merge pull request 'Minimize SQL queries' (#74) from speedupSchemListing into master

Reviewed-by: Chaoscaot <chaoscaot444@gmail.com>

SpigotCore_Main/src/de/steamwar/sql/Schematic.java

@@ -102,15 +102,10 @@ public class Schematic {
 
 	public static List<Schematic> getSchemsAccessibleByUser(int schemOwner){
 		try{
-			ResultSet schematic = SQL.select("SELECT SchemID, SchemName, SchemOwner, Item, SchemType, Rank, SchemFormat FROM Schematic WHERE SchemOwner = ? ORDER BY SchemName", schemOwner);
+			ResultSet schematic = SQL.select("SELECT s.SchemID, s.SchemName, s.SchemOwner, s.Item, s.SchemType, s.Rank, s.SchemFormat FROM Schematic s LEFT JOIN SchemMember sm ON sm.SchemName = s.SchemName AND sm.SchemOwner = s.SchemOwner WHERE s.SchemOwner = ? OR sm.Member = ? ORDER BY s.SchemName", schemOwner, schemOwner);
 			List<Schematic> schematics = new ArrayList<>();
-			while(schematic.next()){
+			while(schematic.next())
 				schematics.add(new Schematic(schematic));
-			}
-			List<SchematicMember> addedSchems = SchematicMember.getAccessibleSchems(schemOwner);
-			for(SchematicMember schem : addedSchems){
-				schematics.add(getSchemFromDB(schem.getSchemName(), schem.getSchemOwner()));
-			}
 			return schematics;
 		}catch(SQLException e){
 			throw new SecurityException("Failed listing schematics", e);