text: USE bc_server_db;
  
  CREATE TABLE custom_signal_string_info
  (
  	id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  	ctime TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  	mtime TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  	
  	permission TINYINT UNSIGNED NOT NULL DEFAULT 0,
  	def_val VARCHAR(512) NOT NULL DEFAULT "",
  	
  	en_statistics BOOLEAN NOT NULL DEFAULT TRUE,
  	custom_signal_id INT UNSIGNED NOT NULL, 
  	
  	UNIQUE INDEX i_custom_signal_id(custom_signal_id)
  );
  