org.apache.calcite.adapter.cassandra

Class CassandraSchema

java.lang.Object

org.apache.calcite.schema.impl.AbstractSchema

org.apache.calcite.adapter.cassandra.CassandraSchema

All Implemented Interfaces:

Schema

public class CassandraSchema
extends AbstractSchema

Schema mapped onto a Cassandra column family

Nested Class Summary

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

Schema.TableType

Field Summary

Fields

Modifier and Type	Field and Description
(package private) String	keyspace
protected static org.slf4j.Logger	LOGGER
(package private) String	name
private SchemaPlus	parentSchema
(package private) com.datastax.driver.core.Session	session

Constructor Summary

Constructors

Constructor and Description
CassandraSchema(String host, String keyspace, SchemaPlus parentSchema, String name) Creates a Cassandra schema.

Method Summary

Methods

Modifier and Type	Method and Description
private void	addMaterializedViews() Add all materialized views defined in the schema to this column family
List<RelFieldCollation>	getClusteringOrder(String columnFamily, boolean view) Get the collation of all clustering key columns.
(package private) Pair<List<String>,List<String>>	getKeyFields(String columnFamily, boolean view) Get all primary key columns from the underlying CQL table
private com.datastax.driver.core.KeyspaceMetadata	getKeyspace()
(package private) RelProtoDataType	getRelDataType(String columnFamily, boolean view)
protected Map<String,Table>	getTableMap()

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

contentsHaveChangedSince, getExpression, getFunctionMultimap, getFunctionNames, getFunctions, getSubSchema, getSubSchemaMap, getSubSchemaNames, getTable, getTableNames, isMutable

Methods inherited from class java.lang.Object

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

Field Detail

session

final com.datastax.driver.core.Session session

keyspace

final String keyspace

parentSchema

private final SchemaPlus parentSchema

name

final String name

LOGGER

protected static final org.slf4j.Logger LOGGER

Constructor Detail

CassandraSchema

public CassandraSchema(String host,
               String keyspace,
               SchemaPlus parentSchema,
               String name)

Creates a Cassandra schema.

Parameters:

host - Cassandra host, e.g. "localhost"

keyspace - Cassandra keyspace name, e.g. "twissandra"

Method Detail

getRelDataType

RelProtoDataType getRelDataType(String columnFamily,
                              boolean view)

getKeyFields

Pair<List<String>,List<String>> getKeyFields(String columnFamily,
                                           boolean view)

Get all primary key columns from the underlying CQL table

Returns:

A list of field names that are part of the partition and clustering keys

getClusteringOrder

public List<RelFieldCollation> getClusteringOrder(String columnFamily,
                                         boolean view)

Get the collation of all clustering key columns.

Returns:

A RelCollations representing the collation of all clustering keys

addMaterializedViews

private void addMaterializedViews()

Add all materialized views defined in the schema to this column family

getTableMap

protected Map<String,Table> getTableMap()

Overrides:

getTableMap in class AbstractSchema

getKeyspace

private com.datastax.driver.core.KeyspaceMetadata getKeyspace()