org.apache.shardingsphere.core.parse.antlr.extractor.api

Interface OptionalSQLSegmentExtractor

All Superinterfaces:

SQLSegmentExtractor

All Known Implementing Classes:

AbstractFromWhereExtractor, ColumnDefinitionExtractor, ColumnExtractor, ColumnSelectItemSegmentExtractor, DeleteFromWhereExtractor, ExpressionSelectItemSegmentExtractor, FromWhereExtractor, FunctionSelectItemSegmentExtractor, GroupByExtractor, IndexNameExtractor, InsertColumnsExtractor, LimitExtractor, OnDuplicateKeyColumnsExtractor, OrderByExtractor, OutlinePrimaryKeyExtractor, RenameColumnDefinitionExtractor, RenameTableExtractor, SelectClauseExtractor, SelectItemExtractor, SetAssignmentsExtractor, SetAutoCommitExtractor, StarSelectItemSegmentExtractor, SubqueryConditionExtractor, SubqueryExtractor, TableNameExtractor, UpdateSetWhereExtractor

public interface OptionalSQLSegmentExtractor
extends SQLSegmentExtractor

Optional SQL segment extractor.

Author:

zhangliang

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<? extends SQLSegment>	extract(org.antlr.v4.runtime.ParserRuleContext ancestorNode) Extract SQL segment from SQL AST.

Method Detail

extract

com.google.common.base.Optional<? extends SQLSegment> extract(org.antlr.v4.runtime.ParserRuleContext ancestorNode)

Extract SQL segment from SQL AST.

Parameters:

ancestorNode - ancestor node of AST

Returns:

SQL segment