Remove unused table and fix update DB lock, which fucked with update schema process.

resources/misc/db_init_mysql.sql

@@ -46,17 +46,6 @@ CREATE TABLE IF NOT EXISTS Feeds (
   type            INTEGER       NOT NULL CHECK (type >= 0)
 );
 -- !
-DROP TABLE IF EXISTS FeedsData;
--- !
-CREATE TABLE IF NOT EXISTS FeedsData (
-  feed_id         INTEGER       NOT NULL,
-  feed_key        VARCHAR(100)  NOT NULL,
-  feed_value      TEXT,
-  
-  PRIMARY KEY (feed_id, feed_key),
-  FOREIGN KEY (feed_id) REFERENCES Feeds (id)
-);
--- !
 DROP TABLE IF EXISTS Messages;
 -- !
 CREATE TABLE IF NOT EXISTS Messages (

resources/misc/db_init_sqlite.sql

@@ -40,17 +40,6 @@ CREATE TABLE IF NOT EXISTS Feeds (
   type            INTEGER     NOT NULL CHECK (type >= 0)
 );
 -- !
-DROP TABLE IF EXISTS FeedsData;
--- !
-CREATE TABLE IF NOT EXISTS FeedsData (
-  feed_id         INTEGER     NOT NULL,
-  feed_key        TEXT        NOT NULL,
-  feed_value      TEXT,
-  
-  PRIMARY KEY (feed_id, feed_key),
-  FOREIGN KEY (feed_id) REFERENCES Feeds (id)
-);
--- !
 DROP TABLE IF EXISTS Messages;
 -- !
 CREATE TABLE IF NOT EXISTS Messages (

resources/misc/db_update_mysql_3_4.sql

@@ -1,3 +1,5 @@
 INSERT INTO Information (inf_key, inf_value) VALUES ('standard_account_enabled', 1);
 -- !
+DROP TABLE IF EXISTS FeedsData;
+-- !
 UPDATE Information SET inf_value = '4' WHERE inf_key = 'schema_version';

resources/misc/db_update_sqlite_3_4.sql

@@ -1,3 +1,5 @@
 INSERT INTO Information (inf_key, inf_value) VALUES ('standard_account_enabled', 1);
 -- !
+DROP TABLE IF EXISTS FeedsData;
+-- !
 UPDATE Information SET inf_value = '4' WHERE inf_key = 'schema_version';

src/miscellaneous/databasefactory.cpp

@@ -290,12 +290,13 @@ QSqlDatabase DatabaseFactory::sqliteInitializeFileBasedDatabase(const QString &c
       }
 
       database.commit();
+      query_db.finish();
       qDebug("File-based SQLite database backend should be ready now.");
     }
     else {
       query_db.next();
-
       QString installed_db_schema = query_db.value(0).toString();
+      query_db.finish();
 
       if (!updateDatabaseSchema(database, installed_db_schema)) {
         qFatal("Database schema was not updated from '%s' to '%s' successully.",
@@ -313,8 +314,6 @@ QSqlDatabase DatabaseFactory::sqliteInitializeFileBasedDatabase(const QString &c
              qPrintable(QDir::toNativeSeparators(database.databaseName())));
       qDebug("File-based SQLite database has version '%s'.", qPrintable(installed_db_schema));
     }
-
-    query_db.finish();
   }
 
   // Everything is initialized now.