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Table pub.mgd.mrk_history
A record in this table represents a nomenclature event in the life of a Marker. A nomenclature event is defined by the event itself (rename, merge, split, etc.), the reason for the event, date of the event, reference (J:).

Generated by
SchemaSpy
Legend: SourceForge.net
Primary key columns
Columns with indexes
Implied relationships
Excluded column relationships
< n > number of related tables
 
Column Type Size Nulls Auto Default Children Parents Comments
_marker_key int4 10
mrk_marker._marker_key mrk_history__marker_key_fkey C
foreign key to MRK_Marker
_marker_event_key int4 10
mrk_event._marker_event_key mrk_history__marker_event_key_fkey R
foreign key to MRK_Event
_marker_eventreason_key int4 10
mrk_eventreason._marker_eventreason_key mrk_history__marker_eventreason_key_fkey R
foreign key to MRK_EventReason
_history_key int4 10
mrk_marker._marker_key mrk_history__history_key_fkey C
foreign key to MRK_Marker
_refs_key int4 10  √  null
bib_refs._refs_key mrk_history__refs_key_fkey R
foreign key to BIB_Refs
sequencenum int4 10 sequence number of the event
name text 2147483647  √  null name of the symbol
event_date timestamp 29,6  √  now() date of the nomenclature event
_createdby_key int4 10 1001
mgi_user._user_key mrk_history__createdby_key_fkey R
user who created the record
_modifiedby_key int4 10 1001
mgi_user._user_key mrk_history__modifiedby_key_fkey R
user who last modified the record
creation_date timestamp 29,6 now() date record was created
modification_date timestamp 29,6 now() date record was last modified

Table contained 265,253 rows at Mon Nov 20 05:26 EST 2017

Indexes:
Column(s) Type Sort Constraint Name
_marker_key + sequencenum Primary key, Used to cluster data Asc/Asc mrk_history_pkey
_history_key Performance Asc mrk_history_idx_history_key
_marker_event_key Performance Asc mrk_history_idx_marker_event_key
_marker_eventreason_key Performance Asc mrk_history_idx_marker_eventreason_key
_refs_key Performance Asc mrk_history_idx_refs_key

Close relationships  within of separation: