org.apache.hadoop.hive.ql.parse

Class ParseUtils

java.lang.Object

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

public final class ParseUtils
extends Object

Library of utility functions used in the parse code.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ParseUtils.ReparseResult

Method Summary

Modifier and Type	Method and Description
static boolean	containsTokenOfType(ASTNode root, Integer... tokens)
static boolean	containsTokenOfType(ASTNode root, PTFUtils.Predicate<ASTNode> predicate)
static String	ensureClassExists(String className)
static CharTypeInfo	getCharTypeInfo(ASTNode node)
static TypeInfo	getComplexTypeTypeInfo(ASTNode typeNode)
static DecimalTypeInfo	getDecimalTypeTypeInfo(ASTNode node)
static Map<Integer,List<ExprNodeGenericFuncDesc>>	getFullPartitionSpecs(org.antlr.runtime.tree.CommonTree ast, Table table, org.apache.hadoop.conf.Configuration conf, boolean canGroupExprs) Get the partition specs from the tree.
static String	getKeywords(Set<String> excludes)
static VarcharTypeInfo	getVarcharTypeInfo(ASTNode node)
static boolean	isJoinToken(ASTNode node) Tests whether the parse tree node is a join token.
static ASTNode	parse(String command, Context ctx) Parses the Hive query.
static ASTNode	parse(String command, Context ctx, String viewFullyQualifiedName) Parses the Hive query.
static CBOPlan	parseQuery(HiveConf conf, String viewQuery)
static List<org.apache.hadoop.hive.metastore.api.FieldSchema>	parseQueryAndGetSchema(HiveConf conf, String viewQuery)
static ParseUtils.ReparseResult	parseRewrittenQuery(Context ctx, String rewrittenQueryStr) Parse the newly generated SQL statement to get a new AST.
static ParseUtils.ReparseResult	parseRewrittenQuery(Context ctx, StringBuilder rewrittenQueryStr)
static String	stripIdentifierQuotes(String val)
static List<String>	validateColumnNameUniqueness(List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas)

Methods inherited from class java.lang.Object

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

Method Detail

parse

public static ASTNode parse(String command,
                            Context ctx)
                     throws ParseException

Parses the Hive query.

Throws:

ParseException

parse

public static ASTNode parse(String command,
                            Context ctx,
                            String viewFullyQualifiedName)
                     throws ParseException

Parses the Hive query.

Throws:

ParseException

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

validateColumnNameUniqueness

public static List<String> validateColumnNameUniqueness(List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas)
                                                 throws SemanticException

Throws:

SemanticException

getVarcharTypeInfo

public static VarcharTypeInfo getVarcharTypeInfo(ASTNode node)
                                          throws SemanticException

Throws:

SemanticException

getCharTypeInfo

public static CharTypeInfo getCharTypeInfo(ASTNode node)
                                    throws SemanticException

Throws:

SemanticException

getDecimalTypeTypeInfo

public static DecimalTypeInfo getDecimalTypeTypeInfo(ASTNode node)
                                              throws SemanticException

Throws:

SemanticException

ensureClassExists

public static String ensureClassExists(String className)
                                throws SemanticException

Throws:

SemanticException

containsTokenOfType

public static boolean containsTokenOfType(ASTNode root,
                                          Integer... tokens)

containsTokenOfType

public static boolean containsTokenOfType(ASTNode root,
                                          PTFUtils.Predicate<ASTNode> predicate)

getKeywords

public static String getKeywords(Set<String> excludes)

parseQuery

public static CBOPlan parseQuery(HiveConf conf,
                                 String viewQuery)
                          throws SemanticException,
                                 ParseException

Throws:

SemanticException

ParseException

parseQueryAndGetSchema

public static List<org.apache.hadoop.hive.metastore.api.FieldSchema> parseQueryAndGetSchema(HiveConf conf,
                                                                                            String viewQuery)
                                                                                     throws SemanticException,
                                                                                            ParseException

Throws:

SemanticException

ParseException

getFullPartitionSpecs

public static Map<Integer,List<ExprNodeGenericFuncDesc>> getFullPartitionSpecs(org.antlr.runtime.tree.CommonTree ast,
                                                                               Table table,
                                                                               org.apache.hadoop.conf.Configuration conf,
                                                                               boolean canGroupExprs)
                                                                        throws SemanticException

Get the partition specs from the tree. This stores the full specification with the comparator operator into the output list.

Returns:

Map of partitions by prefix length. Most of the time prefix length will be the same for all partition specs, so we can just OR the expressions.

Throws:

SemanticException

stripIdentifierQuotes

public static String stripIdentifierQuotes(String val)

parseRewrittenQuery

public static ParseUtils.ReparseResult parseRewrittenQuery(Context ctx,
                                                           StringBuilder rewrittenQueryStr)
                                                    throws SemanticException

Throws:

SemanticException

parseRewrittenQuery

public static ParseUtils.ReparseResult parseRewrittenQuery(Context ctx,
                                                           String rewrittenQueryStr)
                                                    throws SemanticException

Parse the newly generated SQL statement to get a new AST.

Throws:

SemanticException

getComplexTypeTypeInfo

public static TypeInfo getComplexTypeTypeInfo(ASTNode typeNode)
                                       throws SemanticException

Throws:

SemanticException