org.apache.shardingsphere.sql.parser.core.extractor.api

Interface OptionalSQLSegmentExtractor

All Superinterfaces:

SQLSegmentExtractor

All Known Implementing Classes:

AscNullOrderDirectionGroupByExtractor, AscNullOrderDirectionOrderByExtractor, AssignmentExtractor, ColumnDefinitionExtractor, ColumnExtractor, ColumnSelectItemExtractor, CommonExpressionExtractor, DescNullOrderDirectionGroupByExtractor, DescNullOrderDirectionOrderByExtractor, ExpressionExtractor, ExpressionSelectItemExtractor, FunctionSelectItemExtractor, GroupByExtractor, IndexExtractor, InsertColumnsExtractor, LimitExtractor, LiteralExpressionExtractor, LockExtractor, OnDuplicateKeyColumnsExtractor, OrderByExtractor, OutlinePrimaryKeyExtractor, ParameterMarkerExpressionExtractor, PredicateExtractor, RenameColumnDefinitionExtractor, SchemaExtractor, SelectItemExtractor, SelectItemsExtractor, SetAssignmentsExtractor, ShorthandSelectItemExtractor, SubqueryExtractor, TableExtractor, TopSelectItemExtractor, WhereExtractor

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, Map<org.antlr.v4.runtime.ParserRuleContext,Integer> parameterMarkerIndexes) Extract SQL segment from SQL AST.

Method Detail

extract

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

Extract SQL segment from SQL AST.

Parameters:

ancestorNode - ancestor node of AST

parameterMarkerIndexes - parameter marker indexes

Returns:

SQL segment