fix date_trunc_sql to work with < 4-digit year

set has_case_insensitive_like to True

Revert "fix date_trunc_sql to work with < 4-digit year"

This reverts commit 492e32c.

Revert "set has_case_insensitive_like to True"

This reverts commit 2bc4f8e.

fix date_trunc_sql to work with < 4-digit year (#188)

Author: maikhanhbui