org.apache.shardingsphere.sql.parser.core.extractor.impl.dml.select.groupby

Class GroupByExtractor

java.lang.Object

org.apache.shardingsphere.sql.parser.core.extractor.impl.dml.select.groupby.GroupByExtractor

All Implemented Interfaces:

OptionalSQLSegmentExtractor, SQLSegmentExtractor

Direct Known Subclasses:

AscNullOrderDirectionGroupByExtractor, DescNullOrderDirectionGroupByExtractor

public abstract class GroupByExtractor
extends Object
implements OptionalSQLSegmentExtractor

Group by extractor.

Author:

duhongjun, panjuan, zhangliang

Constructor Summary

Constructors

Constructor and Description
GroupByExtractor()

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<GroupBySegment>	extract(org.antlr.v4.runtime.ParserRuleContext ancestorNode, Map<org.antlr.v4.runtime.ParserRuleContext,Integer> parameterMarkerIndexes) Extract SQL segment from SQL AST.

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupByExtractor

public GroupByExtractor()

Method Detail

extract

public final com.google.common.base.Optional<GroupBySegment> extract(org.antlr.v4.runtime.ParserRuleContext ancestorNode,
                                                                     Map<org.antlr.v4.runtime.ParserRuleContext,Integer> parameterMarkerIndexes)

Description copied from interface: OptionalSQLSegmentExtractor

Extract SQL segment from SQL AST.

Specified by:

extract in interface OptionalSQLSegmentExtractor

Parameters:

ancestorNode - ancestor node of AST

parameterMarkerIndexes - parameter marker indexes

Returns:

SQL segment