Package org.apache.drill.exec.planner.types

Class HiveToRelDataTypeConverter

java.lang.Object

org.apache.drill.exec.planner.types.HiveToRelDataTypeConverter

public class HiveToRelDataTypeConverter
extends Object

This class is responsible for data type conversions from FieldSchema instances to RelDataType instances

Constructor Summary

Constructors

Constructor	Description
HiveToRelDataTypeConverter(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

Method Summary

Modifier and Type	Method	Description
org.apache.calcite.rel.type.RelDataType	convertToNullableRelDataType(org.apache.hadoop.hive.metastore.api.FieldSchema field)	Performs conversion from Hive field to nullable RelDataType

Methods inherited from class java.lang.Object

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

Constructor Details

HiveToRelDataTypeConverter

public HiveToRelDataTypeConverter(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

Method Details

convertToNullableRelDataType

public org.apache.calcite.rel.type.RelDataType convertToNullableRelDataType(org.apache.hadoop.hive.metastore.api.FieldSchema field)

Performs conversion from Hive field to nullable RelDataType

Parameters:

field - - representation of data type in Hive Metastore

Returns:

appropriate nullable RelDataType for using with Calcite

Throws:

RuntimeException - for unsupported data types, check UNSUPPORTED_HIVE_DATA_TYPE_ERROR_MSG for details about supported hive types