SchemaSpy - Table pub.mgd.mrk

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:

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

mrk_marker._marker_key

mrk_history__marker_key_fkey C

foreign key to MRK_Marker

_marker_event_key

int4

mrk_event._marker_event_key

mrk_history__marker_event_key_fkey R

foreign key to MRK_Event

_marker_eventreason_key

int4

mrk_eventreason._marker_eventreason_key

mrk_history__marker_eventreason_key_fkey R

foreign key to MRK_EventReason

_history_key

int4

mrk_marker._marker_key

mrk_history__history_key_fkey C

foreign key to MRK_Marker

_refs_key

int4

√

null

bib_refs._refs_key

mrk_history__refs_key_fkey R

foreign key to BIB_Refs

sequencenum

int4

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

1001

mgi_user._user_key

mrk_history__createdby_key_fkey R

user who created the record

_modifiedby_key

int4

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 432,931 rows at Mon May 07 06:18 EDT 2018

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