org.apache.shardingsphere.sql.parser.sql.common.util

Class ColumnExtractor

java.lang.Object

org.apache.shardingsphere.sql.parser.sql.common.util.ColumnExtractor

public final class ColumnExtractor
extends Object

Column extractor.

Constructor Summary

Constructors

Constructor and Description
ColumnExtractor()

Method Summary

Modifier and Type	Method and Description
static Optional<ColumnSegment>	extract(ExpressionSegment expression) Get left value if left value of expression is column segment.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnExtractor

public ColumnExtractor()

Method Detail

extract

public static Optional<ColumnSegment> extract(ExpressionSegment expression)

Get left value if left value of expression is column segment.

Parameters:

expression - expression segment

Returns:

column segment