[columnar] Raise the maximums for row counts

[JerrySievert]

implements #185.

What's changed?

columnar.chunk_group_row_limit and stripe_row_limit maximums set to 10000000.

[wuputah]

is enforcing chunk_group_row_limit >= stripe_row_limit already implemented? just want to make sure we aren't opening up potential weird behavior.

[JerrySievert]

just want to make sure we aren't opening up potential weird behavior.

we can always try and see what weird behavior it ends up allowing. we had the ability to mismatch these before this PR.

[wuputah]

Yes, for sure; can you please test it?

we had the ability to mismatch these before this PR.

That's true, but I'd rather not replace a smaller foot-gun with a larger foot-gun, though both foot-guns would likely have the same result.

[JerrySievert]

clickbench=# set columnar.chunk_group_row_limit = 1000000;
SET
clickbench=# set columnar.stripe_row_limit = 1000;
SET
clickbench=# create table hits using columnar as select * from hits_orig limit 5000000;
SELECT 5000000
clickbench=# \timing on
Timing is on.
clickbench=# select count(*) from hits;
  count
---------
 5000000
(1 row)

Time: 25.338 ms

alternately, with defaults:

clickbench=# create table hits using columnar as select * from hits_orig limit 5000000;
SELECT 5000000
clickbench=# \timing on
Timing is on.
clickbench=# select count(*) from hits;
  count
---------
 5000000
(1 row)

Time: 26.616 ms

[wuputah]

thanks, so I guess it clamps the values at write time?