org.apache.shardingsphere.core.parse.old.parser.clause.expression

Class AliasExpressionParser

java.lang.Object

org.apache.shardingsphere.core.parse.old.parser.clause.expression.AliasExpressionParser

Direct Known Subclasses:

MySQLAliasExpressionParser, OracleAliasExpressionParser, PostgreSQLAliasExpressionParser, SQLServerAliasExpressionParser

public abstract class AliasExpressionParser
extends Object

Alias expression parser.

Author:

zhangliang, maxiaoguang, panjuan

Constructor Summary

Constructors

Constructor and Description
AliasExpressionParser()

Method Summary

Modifier and Type	Method and Description
protected abstract TokenType[]	getCustomizedAvailableKeywordsForSelectItemAlias()
protected abstract TokenType[]	getCustomizedAvailableKeywordsForTableAlias()
com.google.common.base.Optional<String>	parseSelectItemAlias() Parse alias for select item.
void	parseTableAlias() Parse alias for table.
com.google.common.base.Optional<String>	parseTableAlias(SQLStatement sqlStatement, boolean setTableToken, String tableName) Parse alias for table.

Methods inherited from class java.lang.Object

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

Constructor Detail

AliasExpressionParser

public AliasExpressionParser()

Method Detail

parseSelectItemAlias

public com.google.common.base.Optional<String> parseSelectItemAlias()

Parse alias for select item.

Returns:

alias for select item

getCustomizedAvailableKeywordsForSelectItemAlias

protected abstract TokenType[] getCustomizedAvailableKeywordsForSelectItemAlias()

parseTableAlias

public void parseTableAlias()

Parse alias for table.

parseTableAlias

public com.google.common.base.Optional<String> parseTableAlias(SQLStatement sqlStatement,
                                                               boolean setTableToken,
                                                               String tableName)

Parse alias for table.

Parameters:

sqlStatement - SQL statement

setTableToken - is add table token

tableName - table name

Returns:

alias for table

getCustomizedAvailableKeywordsForTableAlias

protected abstract TokenType[] getCustomizedAvailableKeywordsForTableAlias()