Package org.apache.pig.newplan.logical.visitor

Class Summary

Class	Description
CastLineageSetter	Find uid lineage information.
ColumnAliasConversionVisitor	Logical plan visitor which will convert all column alias references to column indexes, using the underlying anonymous expression plan visitor.
DanglingNestedNodeRemover
DuplicateForEachColumnRewriteVisitor
ImplicitSplitInsertVisitor
InputOutputFileValidatorVisitor
LineageFindRelVisitor	Create mapping between uid and Load FuncSpec when the LogicalExpression associated with it is known to hold an unmodified element of data returned by the load function.
ProjectStarExpander	A visitor to walk operators that contain a nested plan and translate project( * ) operators to a list of projection operators, i.e., project( * ) -> project(0), project(1), ...
ProjectStarExpanderUtil	Util function(s) for project-(star/range) expansion
ProjStarInUdfExpander	Expand project-star or project-range when used as udf argument.
ResetProjectionAttachedRelationalOpVisitor
ScalarVariableValidator	This validator checks the correctness of use of scalar variables in logical operators.
ScalarVariableValidator.ProjectFinder
ScalarVisitor	Logical plan visitor which handles scalar projections.
SchemaAliasVisitor
SortInfoSetter
StoreAliasSetter
TypeCheckingExpVisitor
TypeCheckingRelVisitor
UDFFinder
UnionOnSchemaSetter	A visitor that modifies the logical plan (if necessary) for union-onschema functionality.