Uses of Class
org.apache.pig.newplan.logical.expression.ColumnExpression

Packages that use ColumnExpression

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

Uses of ColumnExpression in org.apache.pig.newplan.logical.expression

Subclasses of ColumnExpression in org.apache.pig.newplan.logical.expression

Modifier and Type	Class and Description
class	ConstantExpression A constant
class	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
class	MapLookupExpression
class	ProjectExpression Projection of columns in an expression.