Package org.apache.calcite.piglet

Class Ast

java.lang.Object

org.apache.calcite.piglet.Ast

public class Ast
extends Object

Abstract syntax tree.

Contains inner classes for various kinds of parse tree node.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Ast.Assignment	Abstract base class for statements that assign to a named relation.
static class	Ast.Assignment1	Abstract base class for an assignment with one source relation.
static class	Ast.BagType	Parse tree for a bag type.
static class	Ast.Call	Parse tree node for a call to a function or operator.
static class	Ast.DescribeStmt	Parse tree node for DESCRIBE statement.
static enum	Ast.Direction	Sort direction.
static class	Ast.DistinctStmt	Parse tree node for DISTINCT statement.
static class	Ast.DumpStmt	Parse tree node for DUMP statement.
static class	Ast.FieldSchema	Parse tree for field schema.
static class	Ast.FilterStmt	Parse tree node for FILTER statement.
static class	Ast.ForeachNestedStmt	Parse tree node for FOREACH statement (nested).
static class	Ast.ForeachStmt	Parse tree node for FOREACH statement (non-nested).
static class	Ast.GroupStmt	Parse tree node for GROUP statement.
static class	Ast.Identifier	Parse tree node for Identifier.
static class	Ast.LimitStmt	Parse tree node for LIMIT statement.
static class	Ast.Literal	Parse tree node for Literal.
static class	Ast.LoadStmt	Parse tree node for LOAD statement.
static class	Ast.MapType	Parse tree for a map type.
static class	Ast.Node	Abstract base class for parse tree node.
static class	Ast.NumericLiteral	Parse tree node for NumericLiteral.
static enum	Ast.Op	Parse tree node type.
static class	Ast.OrderStmt	Parse tree node for ORDER statement.
static class	Ast.Program	Parse tree node for a program.
static class	Ast.ScalarType	Parse tree for scalar type such as int.
static class	Ast.Schema	Parse tree for schema.
static class	Ast.SpecialIdentifier	Parse tree node for "*", a special kind of identifier.
static class	Ast.Stmt	Abstract base class for parse tree node representing a statement.
static class	Ast.TupleType	Parse tree for a tuple type.
static class	Ast.Type	Parse tree for type.
static class	Ast.ValuesStmt	Parse tree node for VALUES statement.

Method Summary

Modifier and Type	Method	Description
static String	toString(Ast.Node x)
static org.apache.calcite.piglet.Ast.UnParser	unParse(org.apache.calcite.piglet.Ast.UnParser u, Ast.Node n)	Formats a node and its children as a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

toString

public static String toString(Ast.Node x)

unParse

public static org.apache.calcite.piglet.Ast.UnParser unParse(org.apache.calcite.piglet.Ast.UnParser u,
 Ast.Node n)

Formats a node and its children as a string.