Hello,
I don't see information about the fiscal week on HANA generated table _SYS_BI.M_FISCAL_DIMENSION. However, that's in the main gregorian calendar table _SYS_BI.M_TIME_DIMENSION. Not sure if helps in your requirement.
If so, then you could join your CATSDB table with your _SYS_BI.M_TIME_DIMENSION, get the calendar week refering to that date and finally, get the max and min values for dates within that same calendar week again on _SYS_BI.M_TIME_DIMENSION. Something like this:
select calweek, max(date_sql), min(date_sql) from _SYS_BI.M_TIME_DIMENSION where calweek in ( select distinct t.calweek from sapabap1.catsdb c inner join _SYS_BI.M_TIME_DIMENSION t on c.workdate = t.date_sap) group by calweek
Results would be something like:
| CALWEEK | MAX(DATE_SQL) | MIN(DATE_SQL) |
| 201240 | 2012-10-06 | 2012-09-30 |
| 201241 | 2012-10-13 | 2012-10-07 |
| 201321 | 2013-05-25 | 2013-05-19 |
| 201324 | 2013-06-15 | 2013-06-09 |
| 201326 | 2013-06-29 | 2013-06-23 |
There's a nice blog explaining how to generate this data on HANA.
Generate Time Data in SAP HANA - Part 1
I hope that helps.
BRs,
Lucas de Oliveira