old_contents: import sqlite3
  
  
  class DBControl:
      def __init__(self, db_name : str=":memory:"):
          self.db_conn = sqlite3.connect(db_name)
  
      def create_tables(self):
          c = self.db_conn.cursor()
          c.execute("""CREATE TABLE IF NOT EXISTS Articles (
                                      id INTEGER PRIMARY KEY AUTOINCREMENT,
                                      text TEXT,
                                      digest TEXT UNIQUE,
                                      updatedate TEXT)""")
          c.execute("CREATE VIRTUAL TABLE Articles_fts USING fts4( words TEXT )")
          self.db_conn.commit()
  
      def close_connect(self):
          self.db_conn.close()
          self.db_conn = None
  
      def _select_all(self, table_name : str) -> list:
          c = self.db_conn.cursor()
          c.execute("SELECT * FROM " + table_name)
          return c.fetchall()
  
new_contents: import sqlite3
  from .BloArticle import BloArticle
  
  class DBControl:
      def __init__(self, db_name : str=":memory:"):
          self.db_conn = sqlite3.connect(db_name)
  
      def create_tables(self):
          c = self.db_conn.cursor()
          c.execute("""CREATE TABLE IF NOT EXISTS Articles (
                                      id INTEGER PRIMARY KEY AUTOINCREMENT,
                                      text TEXT,
                                      digest TEXT UNIQUE,
                                      updatedate TEXT)""")
          c.execute("CREATE VIRTUAL TABLE Articles_fts USING fts4( words TEXT )")
          self.db_conn.commit()
  
      def close_connect(self):
          self.db_conn.close()
          self.db_conn = None
  
      def insert_article(self, article: BloArticle):
          assert(article is not None)
          # if has not text data then no action on this method.
          if article.has_text :
              c = self.db_conn.cursor()
              # TODO: Implement insert query for Article and Article_fts
              c.execute("")
              self.db_conn.commit()
  
      def _select_all(self, table_name : str) -> list:
          c = self.db_conn.cursor()
          c.execute("SELECT * FROM " + table_name)
          return c.fetchall()
  
subject: Implement stab of insert article information method.