org.apache.tajo.plan.nameresolver

Class NameResolver

java.lang.Object

org.apache.tajo.plan.nameresolver.NameResolver

Direct Known Subclasses:

ResolverByLegacy, ResolverByRels, ResolverByRelsAndSubExprs, ResolverBySubExprsAndRels

public abstract class NameResolver
extends Object

NameResolver utility

Field Summary

Fields

Modifier and Type	Field and Description
static Map<NameResolvingMode,NameResolver>	resolverMap

Constructor Summary

Constructors

Constructor and Description
NameResolver()

Method Summary

Methods

Modifier and Type	Method and Description
static Column	resolve(LogicalPlan plan, LogicalPlan.QueryBlock block, ColumnReferenceExpr column, NameResolvingMode mode)
static String	resolveDatabase(LogicalPlan.QueryBlock block, String tableName) Try to find the database name

Methods inherited from class java.lang.Object

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

Field Detail

resolverMap

public static Map<NameResolvingMode,NameResolver> resolverMap

Constructor Detail

NameResolver

public NameResolver()

Method Detail

resolveDatabase

public static String resolveDatabase(LogicalPlan.QueryBlock block,
                     String tableName)
                              throws PlanningException

Try to find the database name

Parameters:

block - the current block

tableName - The table name

Returns:

The found database name

Throws:

PlanningException

resolve

public static Column resolve(LogicalPlan plan,
             LogicalPlan.QueryBlock block,
             ColumnReferenceExpr column,
             NameResolvingMode mode)
                      throws PlanningException

Throws:

PlanningException