org.apache.drill.exec.store

Class RecordDataType

java.lang.Object

org.apache.drill.exec.store.RecordDataType

Direct Known Subclasses:

PojoDataType

public abstract class RecordDataType
extends Object

Defines names and data types of columns in a static drill table.

Constructor Summary

Constructors

Constructor and Description
RecordDataType()

Method Summary

Modifier and Type	Method and Description
abstract List<String>	getFieldNames()
abstract List<AbstractMap.SimpleImmutableEntry<org.apache.calcite.sql.type.SqlTypeName,Boolean>>	getFieldSqlTypeNames()
org.apache.calcite.rel.type.RelDataType	getRowType(org.apache.calcite.rel.type.RelDataTypeFactory factory) This method constructs a RelDataType based on the RecordDataType's field sql types and field names.

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordDataType

public RecordDataType()

Method Detail

getFieldSqlTypeNames

public abstract List<AbstractMap.SimpleImmutableEntry<org.apache.calcite.sql.type.SqlTypeName,Boolean>> getFieldSqlTypeNames()

Returns:

the SqlTypeName of columns in the table as a pair with its nullability

getFieldNames

public abstract List<String> getFieldNames()

Returns:

the column names in the table

getRowType

public final org.apache.calcite.rel.type.RelDataType getRowType(org.apache.calcite.rel.type.RelDataTypeFactory factory)

This method constructs a RelDataType based on the RecordDataType's field sql types and field names.

Parameters:

factory - helps construct a RelDataType

Returns:

the constructed type