text: -- Logback: the reliable, generic, fast and flexible logging framework.
  -- Copyright (C) 1999-2010, QOS.ch. All rights reserved.
  --
  -- See http://logback.qos.ch/license.html for the applicable licensing 
  -- conditions.
  
  -- This SQL script creates the required tables by ch.qos.logback.classic.db.DBAppender
  -- for Sybase SQLAnywhere.  Tested on SQLAnywhere 10.0.1.
  
  DROP TABLE logging_event_property 
  DROP TABLE logging_event_exception 
  DROP TABLE logging_event 
  
  CREATE TABLE logging_event 
  ( 
    timestmp         bigint NOT NULL,
    formatted_message  LONG VARCHAR NOT NULL,
    logger_name       VARCHAR(254) NOT NULL,
    level_string      VARCHAR(254) NOT NULL,
    thread_name       VARCHAR(254),
    reference_flag    SMALLINT,
    arg0              VARCHAR(254),
    arg1              VARCHAR(254),
    arg2              VARCHAR(254),
    arg3              VARCHAR(254),  
    caller_filename   VARCHAR(254) NOT NULL,
    caller_class      VARCHAR(254) NOT NULL,
    caller_method     VARCHAR(254) NOT NULL,
    caller_line       varCHAR(4) NOT NULL,
    event_id          int NOT NULL DEFAULT AUTOINCREMENT,
    PRIMARY KEY(event_id) 
  ) 			
  
  CREATE TABLE logging_event_property 
    ( 
  	event_id          int NOT NULL REFERENCES logging_event(event_id), 
  	mapped_key        VARCHAR(254) NOT NULL, 
  	mapped_value      LONG VARCHAR, 
  	PRIMARY KEY(event_id, mapped_key) 
    ) 
  
  CREATE TABLE logging_event_exception 
    ( 
  	event_id         int NOT NULL REFERENCES logging_event(event_id) , 
  	i                SMALLINT NOT NULL, 
  	trace_line       VARCHAR(254) NOT NULL, 
  	PRIMARY KEY(event_id, i) 
    )
  