Package org.apache.flink.table.planner.operations.converters

Class SqlQueryConverter

java.lang.Object

org.apache.flink.table.planner.operations.converters.SqlQueryConverter

All Implemented Interfaces:

SqlNodeConverter<org.apache.calcite.sql.SqlNode>

public class SqlQueryConverter
extends Object
implements SqlNodeConverter<org.apache.calcite.sql.SqlNode>

A converter for query SqlNode, e.g., SqlSelect, SqlOrderBy, SqlTableRef.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.planner.operations.converters.SqlNodeConverter

SqlNodeConverter.ConvertContext

Constructor Summary

Constructors

Constructor	Description
SqlQueryConverter()

Method Summary

Modifier and Type	Method	Description
org.apache.flink.table.operations.Operation	convertSqlNode(org.apache.calcite.sql.SqlNode node, SqlNodeConverter.ConvertContext context)	Convert the given validated SqlNode into an Operation.
Optional<EnumSet<org.apache.calcite.sql.SqlKind>>	supportedSqlKinds()	Returns the SqlKinds of SqlNodes that the SqlNodeConverter supports to convert.

Methods inherited from class java.lang.Object

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

Constructor Details

SqlQueryConverter

public SqlQueryConverter()

Method Details

supportedSqlKinds

public Optional<EnumSet<org.apache.calcite.sql.SqlKind>> supportedSqlKinds()

Description copied from interface: SqlNodeConverter

Returns the SqlKinds of SqlNodes that the SqlNodeConverter supports to convert.

If a SqlNodeConverter returns a non-empty SqlKinds, The conversion framework will find the corresponding converter by matching the SqlKind of SqlNode instead of the class of SqlNode

Specified by:

supportedSqlKinds in interface SqlNodeConverter<org.apache.calcite.sql.SqlNode>

See Also:

• SqlQueryConverter

convertSqlNode

public org.apache.flink.table.operations.Operation convertSqlNode(org.apache.calcite.sql.SqlNode node,
 SqlNodeConverter.ConvertContext context)

Description copied from interface: SqlNodeConverter

Convert the given validated SqlNode into an Operation.

Specified by:

convertSqlNode in interface SqlNodeConverter<org.apache.calcite.sql.SqlNode>

Parameters:

node - a validated SqlNode.

context - the utilities and context information to convert