Creating indices on sqlite tables to drastically speed up lookups

Db/Classes.php

@@ -15,11 +15,13 @@ public static function init()
         $db = Scisr_Db::getDb();
         $create = <<<EOS
 CREATE TABLE IF NOT EXISTS Classes(filename text, class text);
+CREATE INDEX IF NOT EXISTS Classes_index_filename ON Classes (class);
 EOS;
         $db->exec($create);
 
         $create = <<<EOS
 CREATE TABLE IF NOT EXISTS ClassRelationships(class text, is_a text);
+CREATE INDEX IF NOT EXISTS ClassRelationships_index_is_a ON ClassRelationships (is_a);
 EOS;
         $db->exec($create);
     }

Db/FileIncludes.php

@@ -15,6 +15,7 @@ public static function init()
         // Yes, I know this is not the most efficient or normalized. But I'm lazy.
         $create = <<<EOS
 CREATE TABLE IF NOT EXISTS FileIncludes(file text, included_file text);
+CREATE INDEX IF NOT EXISTS FileIncludes_index_file ON FileIncludes (file);
 EOS;
         $db->exec($create);
     }

Db/Files.php

@@ -19,6 +19,7 @@ public static function init()
         $db = Scisr_Db::getDb();
         $create = <<<EOS
 CREATE TABLE IF NOT EXISTS FileInfo (file text, parsed text);
+CREATE INDEX IF NOT EXISTS Files_index_file ON FileInfo (file);
 EOS;
         $db->exec($create);
     }

Db/VariableTypes.php

@@ -17,10 +17,16 @@ public static function init()
         $db = Scisr_Db::getDb();
         $create = <<<EOS
 CREATE TABLE IF NOT EXISTS VariableTypes(filename text, scopeopen integer, variable text, type text, variable_pointer integer);
+CREATE INDEX IF NOT EXISTS VariableTypes_index_filename ON VariableTypes (filename);
+CREATE UNIQUE INDEX IF NOT EXISTS VariableTypes_index_filename_var_ptr ON VariableTypes (filename, variable_pointer);
+CREATE INDEX IF NOT EXISTS VariableTypes_index_filename_var_scope ON VariableTypes (filename, scopeopen, variable);
 EOS;
         $db->exec($create);
         $create = <<<EOS
 CREATE TABLE GlobalVariables(filename text, scopeopen integer, variable text, variable_pointer integer);
+CREATE INDEX IF NOT EXISTS GlobalVariables_index_filename ON GlobalVariables (filename);
+CREATE UNIQUE INDEX IF NOT EXISTS GlobalVariables_index_filename_var_ptr ON GlobalVariables (filename, variable_pointer);
+CREATE INDEX IF NOT EXISTS GlobalVariables_index_filename_var_scope ON GlobalVariables (filename, scopeopen, variable);
 EOS;
         $db->exec($create);
     }