Module generic_expr 

Functionality which is common to all “expression“s (see documentation within crate::expression). See documentation in Expression for high-level summary.

Structs

Expression

The high-level idea is that an Expression is generic over ExpressionType , and contains within it a single parent ExpressionNode as well as an ExpressionType::MleVec containing the unique leaf representations for the leaves of the ExpressionNode tree.

Enums

ExpressionNode

ExpressionNode can be made up of the following:

Traits

ExpressionType

An ExpressionType defines two fields – the type of MLE representation at the leaf of the expression node tree, and the “global” unique copies of each of the MLEs (this is so that if an expression references the same MLE multiple times, the data stored therein is not duplicated)