Package org.apache.pig.newplan.logical.expression

Class Summary

Class	Description
AddExpression	Add Operator
AllSameExpressionVisitor
AndExpression	Boolean and expression.
BinaryExpression	Superclass for all binary expressions
BinCondExpression
CastExpression
ColumnExpression	Super class for all column expressions, including projection, constants, and deferences.
ConstantExpression	A constant
DereferenceExpression	get one or elements out of a tuple or a bag in case of Tuple( a#2:int, b#3:bag{ b_a#4:int, b_b#5:float }, c#6:int ) # 1 (the number after # represents the uid) Dereference ( 0 ) --> a:int - dereference of single column in a tuple gives the field Dereference ( 0,2 ) --> Tuple(a#2:int, c#6:int) #7 - dereference of more than one column gives a tuple Dereference ( 1 ) --> Dereference ( 1 ) --> b:bag{b_b#5:float}#8 - dereference of a bag gives a bag
DivideExpression	Divide Operator
EqualExpression	Equality test expression.
ExpToPhyTranslationVisitor
GreaterThanEqualExpression
GreaterThanExpression
IsNullExpression
LessThanEqualExpression
LessThanExpression
LogicalExpression	Logical representation of expression operators.
LogicalExpressionPlan	A plan containing LogicalExpressionOperators.
LogicalExpressionVisitor	A visitor for expression plans.
MapLookupExpression
ModExpression	Mod Operator
MultiplyExpression	Multiply Operator
NegativeExpression
NotEqualExpression	NotEquality test expression.
NotExpression
OrExpression	Boolean OR Expression
ProjectExpression	Projection of columns in an expression.
RegexExpression	Regex Operator
ScalarExpression
SubtractExpression	Subtract Operator
UnaryExpression	Superclass for all unary expressions
UserFuncExpression