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

Interface SQLSegmentConverter<S extends org.apache.shardingsphere.sql.parser.sql.common.segment.SQLSegment,T extends org.apache.calcite.sql.SqlNode>

Type Parameters:

S - type of SQL segment

T - type of SQL node

All Known Implementing Classes:

AggregationProjectionConverter, BetweenExpressionConverter, BinaryOperationExpressionConverter, ColumnConverter, ColumnOrderByItemConverter, ColumnProjectionConverter, DistinctConverter, ExistsSubqueryExpressionConverter, ExpressionConverter, ExpressionOrderByItemConverter, ExpressionProjectionConverter, FunctionConverter, GroupByConverter, HavingConverter, InExpressionConverter, JoinTableConverter, ListExpressionConverter, LiteralExpressionConverter, OrderByConverter, PaginationValueSQLConverter, ParameterMarkerExpressionConverter, ProjectionsConverter, ShorthandProjectionConverter, SimpleTableConverter, SubqueryExpressionConverter, SubqueryProjectionConverter, SubqueryTableConverter, TableConverter, WhereConverter

public interface SQLSegmentConverter<S extends org.apache.shardingsphere.sql.parser.sql.common.segment.SQLSegment,T extends org.apache.calcite.sql.SqlNode>

SQL segment converter.

Method Summary

Modifier and Type	Method and Description
Optional<T>	convertToSQLNode(S segment) Convert SQL segment to SQL node.
Optional<S>	convertToSQLSegment(T sqlNode) Convert SQL node to SQL segment.
default int	getStartIndex(org.apache.calcite.sql.SqlNode sqlNode) Get start index.
default int	getStopIndex(org.apache.calcite.sql.SqlNode sqlNode) Get stop index.

Method Detail

convertToSQLNode

Optional<T> convertToSQLNode(S segment)

Convert SQL segment to SQL node.

Parameters:

segment - SQL segment be to converted

Returns:

converted SQL node

convertToSQLSegment

Optional<S> convertToSQLSegment(T sqlNode)

Convert SQL node to SQL segment.

Parameters:

sqlNode - SQL node be to converted

Returns:

converted SQL segment

getStartIndex

default int getStartIndex(org.apache.calcite.sql.SqlNode sqlNode)

Get start index.

Parameters:

sqlNode - SQL node

Returns:

start index

getStopIndex

default int getStopIndex(org.apache.calcite.sql.SqlNode sqlNode)

Get stop index.

Parameters:

sqlNode - SQL node

Returns:

stop index