Package org.apache.drill.exec.expr.fn
package org.apache.drill.exec.expr.fn
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ClassDescriptionDefinition of a Drill function defined using the
@FunctionTemplateannotation of the class which implements the function.Attributes of a function used in code generation and optimization.Converts FunctionCalls to Java Expressions.Registry for functions.To avoid the cost of initializing all functions up front, this class contains all information required to initializing a function when it is used.Represents a declared variable (parameter) in a Drill function.