translate count(*) to count(1) automatically

[zachmu]

Customer reports that query select count(*) from table where col is null is consuming 100% CPU and not returning. Table has approximately 1M rows. Same query with count(primary_key_col) is fast, as expected.

[timsehn]

This was diagnosed to be related to the use of text columns which are blobs. Performance degradation in this case was much worse.

[zachmu]

Remaining work here is to automatically translate count(*) into count(1) in the analyzer. Updating description.