====== pears.IQXNetStringToDate ======
<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"."IQXNetStringToDate"( 
  /* Application Maintained Function / Procedure - DO NOT EDIT*/
  in "sdate" char(20) ) 
returns date
begin
  declare "rv" date;
  declare "i" smallint;
  declare "d" smallint;
  declare "m" smallint;
  declare "y" smallint;
  set "sdate" = "trim"("sdate");
  if "sdate" regexp '^\\d{4}\\-.*' then -- ISO format
    set "y" = cast("left"("sdate",4) as smallint);
    set "sdate" = "stuff"("sdate",1,5,'');
    set "i" = "charindex"('-',"sdate");
    if "i" <= 1 then
      return null
    end if;
    set "m" = cast("left"("sdate","i"-1) as smallint);
    set "sdate" = "stuff"("sdate",1,"i",'');
    set "d" = cast("sdate" as smallint)
  else -- UK format with optional preceding day name
    set "i" = "charindex"(' ',"sdate");
    if "i" > 0 then -- Day name to be removed before parsing date
      set "sdate" = "trim"("stuff"("sdate",1,"i",''))
    end if;
    set "i" = "charindex"('/',"sdate");
    if "i" <= 1 then
      return null
    end if;
    set "d" = cast("left"("sdate","i"-1) as smallint);
    set "sdate" = "stuff"("sdate",1,"i",'');
    set "i" = "charindex"('/',"sdate");
    if "i" <= 1 then
      return null
    end if;
    set "m" = cast("left"("sdate","i"-1) as smallint);
    set "sdate" = "stuff"("sdate",1,"i",'');
    set "y" = cast("sdate" as smallint)
  end if;
  return "ymd"("y","m","d")
exception
  when others then return null
end
</code>