Thanks for explaining, Matthias! Nantia
2017-02-17 22:01 GMT+02:00 Matthias Boehm <mboe...@googlemail.com>: > ad 1: t(-*): ternary minus mult (for patterns like X-s*Y) > > ad 2: ua(+RC): unary aggregate with aggregation function + (at runtime > level you will see k+ for Kahan plus) and direction RC, i.e., full > aggregate over rows and columns. > > ad 3: lix: matrix or frame left indexing (for patterns like X[a:b,c:d] = > ...) > > ad 4: u(cast_as_scalar): unary cast from matrix or frame to scalar of > value type double. > > Regards, > Matthias > > On 2/17/2017 5:46 AM, Nantia Makrynioti wrote: > >> Hello, >> >> I generated a HOP plan using -explain, but I can't find the meaning of the >> following operators: >> >> >> 1. t(-*) >> 2. ua(+RC) >> 3. lix >> 4. u(cast_as_scalar) >> >> >> Thank you in advance, >> Nantia >> >>
