github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/opt/exec/README.md (about)

     1  This `exec` package is temporarily in the `opt` directory. Eventually, it will
     2  be moved to the `sql` directory, and we will move other execution-related
     3  packages into the `sql/exec` directory as well. Until then, it's better to keep
     4  it here so that developers are not confused as to why we have a top-level
     5  `exec` directory that doesn't actually contain the main body of execution code.