Description:
Records all database events (ie. insert, update, delete). Gets purged after each export

PRIMARY KEY
s_table_name_c varchar (64) NOT NULL	Name of the database table where the event occurred
s_rowid_c varchar (40) NOT NULL	Rowid of the record that the event applied to

s_change_type_c varchar (2) NOT NULL	Type of event (I, U or D - Insert, Update, Delete)
s_natural_key_c varchar (2000) NOT NULL	Concatenation of the natural key values for the affected record (the primary key is not enough where a surrogate key is used as this is not meaningful across sites)
s_date_d date NOT NULL	Date on which the event took place
s_time_i integer NOT NULL	Time at which event took place
s_date_created_d date default: CURRENT_DATE	The date the record was created.
s_created_by_c varchar (20)	User ID of who created this record.	s_user
s_date_modified_d date	The date the record was modified.
s_modified_by_c varchar (20)	User ID of who last modified this record.	s_user
s_modification_id_t timestamp default: CURRENT_TIMESTAMP	This identifies the current version of the record.
FOREIGN KEY s_change_event_fkcr: s_created_by_c => s_user s_change_event_fkmd: s_modified_by_c => s_user