Package org.apache.calcite.piglet

Piglet, a Pig-like language.

Class Summary

Class	Description
Ast	Abstract syntax tree.
Ast.Assignment	Abstract base class for statements that assign to a named relation.
Ast.Assignment1	Abstract base class for an assignment with one source relation.
Ast.BagType	Parse tree for a bag type.
Ast.Call	Parse tree node for a call to a function or operator.
Ast.DescribeStmt	Parse tree node for DESCRIBE statement.
Ast.DistinctStmt	Parse tree node for DISTINCT statement.
Ast.DumpStmt	Parse tree node for DUMP statement.
Ast.FieldSchema	Parse tree for field schema.
Ast.FilterStmt	Parse tree node for FILTER statement.
Ast.ForeachNestedStmt	Parse tree node for FOREACH statement (nested).
Ast.ForeachStmt	Parse tree node for FOREACH statement (non-nested).
Ast.GroupStmt	Parse tree node for GROUP statement.
Ast.Identifier	Parse tree node for Identifier.
Ast.LimitStmt	Parse tree node for LIMIT statement.
Ast.Literal	Parse tree node for Literal.
Ast.LoadStmt	Parse tree node for LOAD statement.
Ast.MapType	Parse tree for a map type.
Ast.Node	Abstract base class for parse tree node.
Ast.NumericLiteral	Parse tree node for NumericLiteral.
Ast.OrderStmt	Parse tree node for ORDER statement.
Ast.Program	Parse tree node for a program.
Ast.ScalarType	Parse tree for scalar type such as int.
Ast.Schema	Parse tree for schema.
Ast.SpecialIdentifier	Parse tree node for "*", a special kind of identifier.
Ast.Stmt	Abstract base class for parse tree node representing a statement.
Ast.TupleType	Parse tree for a tuple type.
Ast.Type	Parse tree for type.
Ast.UnParser	Contains output and indentation level while a tree of nodes is being converted to text.
Ast.ValuesStmt	Parse tree node for VALUES statement.
DynamicTupleRecordType	Represents Pig Tuples with unknown fields.
Handler	Walks over a Piglet AST and calls the corresponding methods in a PigRelBuilder.
PigConverter	Extension from PigServer to convert Pig scripts into logical relational algebra plans and SQL statements.
PigRelBuilder	Extension to RelBuilder for Pig logical operators.
PigRelExVisitor	Visits pig expression plans and converts them into corresponding RexNodes.
PigRelExWalker	Post-order walker for Pig expression plans.
PigRelOpInnerVisitor	Visits Pig logical operators of Pig inner logical plans (in LOForEach) and converts them into corresponding relational algebra plans.
PigRelOpVisitor	Visits Pig logical operators and converts them into corresponding relational algebra plans.
PigRelOpWalker	Post-order walker for Pig logical relational plans.
PigRelOpWalker.PlanPreVisitor	Visitor that allow doing pre-visit.
PigRelSqlUdfs	User-defined functions (UDFs) needed for Pig-to-RelNode translation.
PigRelToSqlConverter	An extension of RelToSqlConverter to convert a relation algebra tree, translated from a Pig script, into a SQL statement.
PigRelUdfConverter	This class maps a Pig UDF to a corresponding SQL built-in function/operator.
PigTable	A non-queriable table that contains only row type to represent a Pig Table.
PigToSqlAggregateRule	Planner rule that converts Pig aggregate UDF calls to built-in SQL aggregates.
PigTypes	Utility methods for converting Pig data types to SQL types.
PigTypes.PigRelDataTypeFactory	Type factory that produces types with the nullability when converting from Pig types.
PigUdfFinder	Utility class to find the implementation method object for a given Pig UDF class.
PigUdfs	Implementation methods.
PigUserDefinedFunction	Class to represent Pig UDF objects

Enum Summary

Enum	Description
Ast.Direction	Sort direction.
Ast.Op	Parse tree node type.
PigRelOpVisitor.GroupType	Type of Pig groups