org.apache.shardingsphere.sqlfederation.optimizer.converter.segment.projection

Class DistinctConverter

java.lang.Object

org.apache.shardingsphere.sqlfederation.optimizer.converter.segment.projection.DistinctConverter

All Implemented Interfaces:

SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionsSegment,org.apache.calcite.sql.SqlNodeList>

public final class DistinctConverter
extends Object
implements SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionsSegment,org.apache.calcite.sql.SqlNodeList>

Distinct converter.

Constructor Summary

Constructors

Constructor and Description
DistinctConverter()

Method Summary

Modifier and Type	Method and Description
Optional<org.apache.calcite.sql.SqlNodeList>	convert(org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionsSegment segment) Convert.

Methods inherited from class java.lang.Object

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

Constructor Detail

DistinctConverter

public DistinctConverter()

Method Detail

convert

public Optional<org.apache.calcite.sql.SqlNodeList> convert(org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionsSegment segment)

Description copied from interface: SQLSegmentConverter

Convert.

Specified by:

convert in interface SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionsSegment,org.apache.calcite.sql.SqlNodeList>

Parameters:

segment - SQL segment be to converted

Returns:

converted SQL node