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
