docs: private void createTables() throws SQLException {
          Statement stmt = this.conn.createStatement();
  
          stmt.execute(DbConstants.DROP_METADATA_STATEMENT);
          stmt.execute(DbConstants.DROP_INDEX_STATEMENT);
          stmt.execute(DbConstants.DROP_CATEGORY_MAP_STATEMENT);
          stmt.execute(DbConstants.DROP_DATA_STATEMENT);
          stmt.execute(DbConstants.DROP_CATEGORIES_STATEMENT);
  
          stmt.execute(DbConstants.CREATE_CATEGORIES_STATEMENT);
          stmt.execute(DbConstants.CREATE_DATA_STATEMENT);
          stmt.execute(DbConstants.CREATE_CATEGORY_MAP_STATEMENT);
          stmt.execute(DbConstants.CREATE_INDEX_STATEMENT);
          stmt.execute(DbConstants.CREATE_METADATA_STATEMENT);
  
          stmt.close();
      }