org.apache.hadoop.hive.ql.parse

Class ParseUtils

java.lang.Object

org.apache.hadoop.hive.ql.parse.ParseUtils

public final class ParseUtils
extends java.lang.Object

Library of utility functions used in the parse code.

Method Summary

Modifier and Type	Method and Description
static ASTNode	findRootNonNullToken(ASTNode tree) Performs a descent of the leftmost branch of a tree, stopping when either a node with a non-null token is found or the leaf level is encountered.
static VarcharTypeParams	getVarcharParams(java.lang.String typeName, ASTNode node)
static boolean	isJoinToken(ASTNode node) Tests whether the parse tree node is a join token.
static java.util.List<java.lang.String>	validateColumnNameUniqueness(java.util.List<FieldSchema> fieldSchemas)

Methods inherited from class java.lang.Object

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

Method Detail

isJoinToken

public static boolean isJoinToken(ASTNode node)

Tests whether the parse tree node is a join token.

Parameters:

node - The parse tree node

Returns:

boolean

findRootNonNullToken

public static ASTNode findRootNonNullToken(ASTNode tree)

Performs a descent of the leftmost branch of a tree, stopping when either a node with a non-null token is found or the leaf level is encountered.

Parameters:

tree - candidate node from which to start searching

Returns:

node at which descent stopped

validateColumnNameUniqueness

public static java.util.List<java.lang.String> validateColumnNameUniqueness(java.util.List<FieldSchema> fieldSchemas)
                                                                     throws SemanticException

Throws:

SemanticException

getVarcharParams

public static VarcharTypeParams getVarcharParams(java.lang.String typeName,
                                                 ASTNode node)
                                          throws SemanticException

Throws:

SemanticException