====== pears.EntityRateFilter ======
<WRAP center round info>
Generated schema reference. Regenerate this page from the SQL unload; keep hand-maintained business notes in the narrative namespace.
</WRAP>

===== Original SQL =====
<code sql>
create function "pears"."EntityRateFilter"( in "FilterNo" smallint,in "WeekNo" integer,in "VacID" char(20),in "PersID" char(20),in "PlacID" char(20),in "ShiftID" char(20) ) 
returns char(4)
begin
  declare "rv" char(4);
  declare "qual" integer;
  -- Used to filter the rate tables
  -- Return null if specified FilterNo is not applicable to this entity
  set "rv" = null;
  if "filterno" = 1 then -- AWR
    if "weekno" is null then
      return null -- Filter only applied in timesheet entry
    end if;
    set "qual" = "AWRQualified"(null,"WeekNo","VacID","PersID","PlacID","ShiftID");
    if "qual" is null then
      return null
    else if "qual" = 0 then
        return 'N'
      else
        return 'Y'
      end if end if end if;
  if "filterno" = 2 then -- Ltd Co.
    if "trim"("isnull"("persid",'')) <> '' then -- Note empty parameters cannot be relied upon to be null
      if exists(select * from "pay_employee" where "personid" = "persid" and "taxmethod" = 2) then
        set "rv" = 'Y'
      else
        set "rv" = 'N'
      -- If persid not supplied then leave rv as NULL for don't know
      end if end if end if;
  if "filterno" = 3 then
    return "EntitySpeciality"("VacID","PersID","PlacID","ShiftID")
  end if;
  return "rv"
end
</code>