Select function-based index data as rows in a query?
I'm trying to learn about indexes in Oracle 18c.
As a novice, it's occurred to me that it might be interesting to view the actual data that's in a function-based index:
create index sidewalk_endpoint_list_idx on my_owner.sidewalks(my_owner.endpoint_list(shape),objectid);
Is there a way to SELECT an index's data in a query?
select * from sidewalk_endpoint_list_idx
That might be a silly question. Maybe indexes aren't stored in tables. But I thought it was worth asking, just so I can learn.
You can't, but you can select it from the table:
select my_owner.endpoint_list(shape),objectid,rowid from my_owner.sidewalks;