org.apache.shardingsphere.infra.federation.optimizer.converter.segment.expression

Class ExpressionConverter

java.lang.Object

org.apache.shardingsphere.infra.federation.optimizer.converter.segment.expression.ExpressionConverter

All Implemented Interfaces:

SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment,org.apache.calcite.sql.SqlNode>

public final class ExpressionConverter
extends Object
implements SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment,org.apache.calcite.sql.SqlNode>

Expression converter.

Constructor Summary

Constructors

Constructor and Description
ExpressionConverter()

Method Summary

Modifier and Type	Method and Description
Optional<org.apache.calcite.sql.SqlNode>	convertToSQLNode(org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment segment) Convert SQL segment to SQL node.
Optional<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment>	convertToSQLSegment(org.apache.calcite.sql.SqlNode sqlNode) Convert SQL node to SQL segment.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.shardingsphere.infra.federation.optimizer.converter.segment.SQLSegmentConverter

getStartIndex, getStopIndex

Constructor Detail

ExpressionConverter

public ExpressionConverter()

Method Detail

convertToSQLNode

public Optional<org.apache.calcite.sql.SqlNode> convertToSQLNode(org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment segment)

Description copied from interface: SQLSegmentConverter

Convert SQL segment to SQL node.

Specified by:

convertToSQLNode in interface SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment,org.apache.calcite.sql.SqlNode>

Parameters:

segment - SQL segment be to converted

Returns:

converted SQL node

convertToSQLSegment

public Optional<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment> convertToSQLSegment(org.apache.calcite.sql.SqlNode sqlNode)

Description copied from interface: SQLSegmentConverter

Convert SQL node to SQL segment.

Specified by:

convertToSQLSegment in interface SQLSegmentConverter<org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment,org.apache.calcite.sql.SqlNode>

Parameters:

sqlNode - SQL node be to converted

Returns:

converted SQL segment