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+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/expression.R
+\name{Expression}
+\alias{Expression}
+\title{Arrow expressions}
+\description{
+\code{Expression}s are used to define filter logic for passing to a \link{Dataset}
+\link{Scanner}.
+
+\code{Expression$scalar(x)} constructs an \code{Expression} which always evaluates to
+the provided scalar (length-1) R value.
+
+\code{Expression$field_ref(name)} is used to construct an \code{Expression} which
+evaluates to the named column in the \code{Dataset} against which it is evaluated.
+
+\code{Expression$create(function_name, ..., options)} builds a function-call
+\code{Expression} containing one or more \code{Expression}s.
+}