Package org.apache.drill.exec.planner.sql.handlers

Class BaseAliasHandler

java.lang.Object

org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler

org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler

org.apache.drill.exec.planner.sql.handlers.BaseAliasHandler

Direct Known Subclasses:

CreateAliasHandler, DropAliasHandler, DropAllAliasesHandler

public class BaseAliasHandler
extends DefaultSqlHandler

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler

DefaultSqlHandler.ConvertedRelNode, DefaultSqlHandler.MetaDataProviderModifier

Field Summary

Fields inherited from class org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler

config, context

Constructor Summary

Constructors

Constructor	Description
BaseAliasHandler(SqlHandlerConfig config)

Method Summary

Modifier and Type	Method	Description
protected void	checkAdminPrivileges(QueryOptionManager options)	Admin privileges checker.
protected void	checkAliasesEnabled()	Checks whether aliases support is enabled.
protected AliasRegistry	getAliasRegistry(String aliasTarget)
protected boolean	hasAdminPrivileges(QueryOptionManager options)	Returns true if query user has admin privileges.
protected String	resolveUserName(org.apache.calcite.sql.SqlNode user)	Obtains userName from specified node and ensures that specified user has admin privileges for the case when it is different from the query user.

Methods inherited from class org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler

addRenamedProject, convertToDrel, convertToPlan, convertToPop, convertToPrel, convertToRawDrel, getPlan, getPops, log, log, log, logAndSetTextPlan, rewrite, transform, transform, validateAndConvert, validateNode

Methods inherited from class org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler

unwrap

Methods inherited from class java.lang.Object

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

Constructor Details

BaseAliasHandler

public BaseAliasHandler(SqlHandlerConfig config)

Method Details

checkAliasesEnabled

protected void checkAliasesEnabled()

Checks whether aliases support is enabled.

checkAdminPrivileges

protected void checkAdminPrivileges(QueryOptionManager options)

Admin privileges checker.

Parameters:

options - Options object

hasAdminPrivileges

protected boolean hasAdminPrivileges(QueryOptionManager options)

Returns true if query user has admin privileges.

Parameters:

options - Options object

Returns:

true if query user has admin privileges

resolveUserName

protected String resolveUserName(org.apache.calcite.sql.SqlNode user)

Obtains userName from specified node and ensures that specified user has admin privileges for the case when it is different from the query user. If no user specified, query user will be returned.

Parameters:

user - source for userName

Returns:

userName

getAliasRegistry

protected AliasRegistry getAliasRegistry(String aliasTarget)