org.apache.calcite.adapter.cassandra

Class CassandraTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.adapter.cassandra.CassandraTable

All Implemented Interfaces:

QueryableTable, Table, TranslatableTable

public class CassandraTable
extends AbstractQueryableTable
implements TranslatableTable

Table based on a Cassandra column family

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CassandraTable.CassandraQueryable<T> Implementation of Queryable based on a CassandraTable.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) List<RelFieldCollation>	clusteringOrder
private String	columnFamily
(package private) Pair<List<String>,List<String>>	keyFields
(package private) RelProtoDataType	protoRowType
private CassandraSchema	schema
private boolean	view

Fields inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

elementType

Constructor Summary

Constructors

Constructor and Description
CassandraTable(CassandraSchema schema, String columnFamily)
CassandraTable(CassandraSchema schema, String columnFamily, boolean view)

Method Summary

Modifier and Type	Method and Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName)
List<RelFieldCollation>	getClusteringOrder()
Pair<List<String>,List<String>>	getKeyFields()
RelDataType	getRowType(RelDataTypeFactory typeFactory)
Enumerable<Object>	query(com.datastax.driver.core.Session session)
Enumerable<Object>	query(com.datastax.driver.core.Session session, List<Map.Entry<String,Class>> fields, List<Map.Entry<String,String>> selectFields, List<String> predicates, List<String> order, Integer offset, Integer fetch) Executes a CQL query on the underlying table.
RelNode	toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable)
String	toString()

Methods inherited from class org.apache.calcite.adapter.java.AbstractQueryableTable

getElementType, getExpression

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

getJdbcTableType, getStatistic

Methods inherited from class java.lang.Object

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

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

getJdbcTableType, getStatistic

Field Detail

protoRowType

RelProtoDataType protoRowType

keyFields

Pair<List<String>,List<String>> keyFields

clusteringOrder

List<RelFieldCollation> clusteringOrder

schema

private final CassandraSchema schema

columnFamily

private final String columnFamily

view

private final boolean view

Constructor Detail

CassandraTable

public CassandraTable(CassandraSchema schema,
                      String columnFamily,
                      boolean view)

CassandraTable

public CassandraTable(CassandraSchema schema,
                      String columnFamily)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getRowType

public RelDataType getRowType(RelDataTypeFactory typeFactory)

Specified by:

getRowType in interface Table

getKeyFields

public Pair<List<String>,List<String>> getKeyFields()

getClusteringOrder

public List<RelFieldCollation> getClusteringOrder()

query

public Enumerable<Object> query(com.datastax.driver.core.Session session)

query

public Enumerable<Object> query(com.datastax.driver.core.Session session,
                                List<Map.Entry<String,Class>> fields,
                                List<Map.Entry<String,String>> selectFields,
                                List<String> predicates,
                                List<String> order,
                                Integer offset,
                                Integer fetch)

Executes a CQL query on the underlying table.

Parameters:

session - Cassandra session

fields - List of fields to project

predicates - A list of predicates which should be used in the query

Returns:

Enumerator of results

asQueryable

public <T> Queryable<T> asQueryable(QueryProvider queryProvider,
                                    SchemaPlus schema,
                                    String tableName)

Specified by:

asQueryable in interface QueryableTable

toRel

public RelNode toRel(RelOptTable.ToRelContext context,
                     RelOptTable relOptTable)

Specified by:

toRel in interface TranslatableTable