Package org.apache.calcite.adapter.file

Class CsvTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.file.CsvTable

All Implemented Interfaces:

Table, Wrapper

Direct Known Subclasses:

CsvTranslatableTable

public abstract class CsvTable
extends AbstractTable

Base class for table that reads CSV files.

Copied from CsvFilterableTable in demo CSV adapter, with more advanced features.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	CsvTable.Flavor	Various degrees of table "intelligence".

Field Summary

Fields

Modifier and Type	Field	Description
protected final RelProtoDataType	protoRowType
protected final Source	source

Method Summary

Modifier and Type	Method	Description
List<RelDataType>	getFieldTypes(RelDataTypeFactory typeFactory)	Returns the field types of this CSV table.
RelDataType	getRowType(RelDataTypeFactory typeFactory)	Returns this table's row type.
protected boolean	isStream()	Returns whether the table represents a stream.

Methods inherited from class org.apache.calcite.schema.impl.AbstractTable

getJdbcTableType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.schema.Wrapper

maybeUnwrap, unwrapOrThrow

Field Details

source

protected final Source source

protoRowType

protected final RelProtoDataType protoRowType

Method Details

getRowType

public RelDataType getRowType(RelDataTypeFactory typeFactory)

Description copied from interface: Table

Returns this table's row type.

This is a struct type whose fields describe the names and types of the columns in this table.

The implementer must use the type factory provided. This ensures that the type is converted into a canonical form; other equal types in the same query will use the same object.

Parameters:

typeFactory - Type factory with which to create the type

Returns:

Row type

getFieldTypes

public List<RelDataType> getFieldTypes(RelDataTypeFactory typeFactory)

Returns the field types of this CSV table.

isStream

protected boolean isStream()

Returns whether the table represents a stream.