Package org.apache.calcite.adapter.csv

Class CsvSchema

java.lang.Object

org.apache.calcite.schema.impl.AbstractSchema

org.apache.calcite.adapter.csv.CsvSchema

All Implemented Interfaces:

Schema

public class CsvSchema
extends AbstractSchema

Schema mapped onto a directory of CSV files. Each table in the schema is a CSV file in that directory.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.schema.impl.AbstractSchema

AbstractSchema.Factory

Nested classes/interfaces inherited from interface org.apache.calcite.schema.Schema

Schema.TableType

Constructor Summary

Constructors

Constructor	Description
CsvSchema(File directoryFile, CsvTable.Flavor flavor)	Creates a CSV schema.

Method Summary

Modifier and Type	Method	Description
protected Map<String,Table>	getTableMap()	Returns a map of tables in this schema by name.

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

getExpression, getFunctionMultimap, getFunctionNames, getFunctions, getSubSchema, getSubSchemaMap, getSubSchemaNames, getTable, getTableNames, getType, getTypeMap, getTypeNames, isMutable, snapshot

Methods inherited from class java.lang.Object

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

Constructor Details

CsvSchema

public CsvSchema(File directoryFile,
 CsvTable.Flavor flavor)

Creates a CSV schema.

Parameters:

directoryFile - Directory that holds .csv files

flavor - Whether to instantiate flavor tables that undergo query optimization

Method Details

getTableMap

protected Map<String,Table> getTableMap()

Description copied from class: AbstractSchema

Returns a map of tables in this schema by name.

The implementations of AbstractSchema.getTableNames() and AbstractSchema.getTable(String) depend on this map. The default implementation of this method returns the empty map. Override this method to change their behavior.

Overrides:

getTableMap in class AbstractSchema

Returns:

Map of tables in this schema by name