org.apache.flink.table.planner.typeutils

Class LogicalRelDataTypeConverter

java.lang.Object

org.apache.flink.table.planner.typeutils.LogicalRelDataTypeConverter

@Internal
public final class LogicalRelDataTypeConverter
extends Object

Symmetric converter between LogicalType and RelDataType.

This converter has many similarities with FlinkTypeFactory and might also replace it at some point. However, for now it is more consistent and does not lose information (i.e. for TIME(9) or interval types). It still delegates to RelDataTypeFactory but only for predefined/basic types.

Note: The conversion to LogicalType is not 100% symmetric and is currently optimized for expressions. Information about the StructKind of a RelRecordType is always set to StructKind.PEEK_FIELDS_NO_EXPAND. Missing precision and scale will be filled with Flink's default values such that all resulting LogicalTypes will be fully resolved.

Constructor Summary

Constructors

Constructor and Description
LogicalRelDataTypeConverter()

Method Summary

Modifier and Type	Method and Description
static org.apache.flink.table.types.logical.LogicalType	toLogicalType(org.apache.calcite.rel.type.RelDataType relDataType, org.apache.flink.table.catalog.DataTypeFactory dataTypeFactory)
static org.apache.calcite.rel.type.RelDataType	toRelDataType(org.apache.flink.table.types.logical.LogicalType logicalType, org.apache.calcite.rel.type.RelDataTypeFactory relDataTypeFactory)

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalRelDataTypeConverter

public LogicalRelDataTypeConverter()

Method Detail

toRelDataType

public static org.apache.calcite.rel.type.RelDataType toRelDataType(org.apache.flink.table.types.logical.LogicalType logicalType,
                                                                    org.apache.calcite.rel.type.RelDataTypeFactory relDataTypeFactory)

toLogicalType

public static org.apache.flink.table.types.logical.LogicalType toLogicalType(org.apache.calcite.rel.type.RelDataType relDataType,
                                                                             org.apache.flink.table.catalog.DataTypeFactory dataTypeFactory)