Footprints Data Model

Table
Name schd_actual_period
Comment
Given the definitions of the standard work periods and holidays, these are the
actual work periods.  If overlapping shift work periods are defined, the time
ranges here represent all shifts.  This makes it easier to do math against
working hours.  In FootPrints Perl, this table is generated by the Perl calendar
code, so that the dashboard can use the information in the calculation of work
hours elapsed. The only purpose of this table is to make it possible to
calculate the work hour time difference between two dates.  A program that can
understand the Calendar Service API  schedule, and any versioning of it, will
compute the actual work periods and save them to this table. Then a program in
the Java layer can compute the work hour difference between two dates, just as
well as a program in the database layer.

Column
Name Datatype Comment Is PK Is FK
schd_actual_period_id bigint The automatically generated primary key of the schd_actual_period table. Yes No
begin_date datetime Begin Date and Time of the work hour period. No No
end_date datetime End Date and Time of the work hour period. No No
work_durn_in_mins int
Work Time duration in minutes.  This is the number of work minutes within the
begin and end date of the period, which is equal to the end date minus the begin
date, because the work periods can be sparsely populated.  This value can be
summed to get the total work minutes for a date range.  If a date marker
requested falls within the begin and end date of the actual period, then the
minutes from the marker date and the begin/end point must be subtracted from
this number.
No No
schd_id bigint A Foreign Key to the Calendar that was used to generate the actual periods. No Yes
cum_work_durn_in_mins int
Cumulative Work Time duration in minutes.   This is the number of work minutes
from the actual first period to the end of the current actual period as
calculated by a running total or cumulative sum of the Work Duration field. 
Because the work periods will be sparsely populated, the hard dates cannot be
subtracted to yield Work Duration Difference.  However, this Cumulative Work
Duration can be subtracted to get the Work Duration difference.   If a date
marker requested falls within the begin and end date of the actual period, then
the minutes from the marker date and the begin/end point must be subtracted from
this number.
No No
begin_date_utc_s varchar(23)
A string version of the UTC date that is used in order to error correct
JDBC/Hibernate persistence of the date which produces errors on Daylight Savings
Time boundaries.
No No
end_date_utc_s varchar(23)
A string version of the UTC date that is used in order to error correct
JDBC/Hibernate persistence of the date which produces errors on Daylight Savings
Time boundaries.
No No