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With inspiration from other libraries

There is a newer version: 2.12.15

-- 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
--
-- It is intended for Oracle 9i, 10g and 11g databases. Tested on version 9.2, 
-- 10g and 11g.

-- The following lines are useful in cleaning any previously existing tables 

--drop TRIGGER logging_event_id_seq_trig; 
--drop SEQUENCE logging_event_id_seq; 
--drop table logging_event_property; 
--drop table logging_event_exception; 
--drop table logging_event; 


CREATE SEQUENCE logging_event_id_seq MINVALUE 1 START WITH 1;

CREATE TABLE logging_event 
  (
    timestmp         NUMBER(20) NOT NULL,
    formatted_message  VARCHAR2(4000) 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       CHAR(4) NOT NULL,
    event_id          NUMBER(10) PRIMARY KEY
  );


-- the / suffix may or may not be needed depending on your SQL Client
-- Some SQL Clients, e.g. SQuirrel SQL has trouble with the following
-- trigger creation command, while SQLPlus (the basic SQL Client which
-- ships with Oracle) has no trouble at all.

CREATE TRIGGER logging_event_id_seq_trig
  BEFORE INSERT ON logging_event
  FOR EACH ROW  
  BEGIN  
    SELECT logging_event_id_seq.NEXTVAL 
    INTO   :NEW.event_id 
    FROM   DUAL;  
  END;
/


CREATE TABLE logging_event_property
  (
    event_id	      NUMBER(10) NOT NULL,
    mapped_key        VARCHAR2(254) NOT NULL,
    mapped_value      VARCHAR2(1024),
    PRIMARY KEY(event_id, mapped_key),
    FOREIGN KEY (event_id) REFERENCES logging_event(event_id)
  );
  
CREATE TABLE logging_event_exception
  (
    event_id         NUMBER(10) NOT NULL,
    i                SMALLINT NOT NULL,
    trace_line       VARCHAR2(254) NOT NULL,
    PRIMARY KEY(event_id, i),
    FOREIGN KEY (event_id) REFERENCES logging_event(event_id)
  );