Package 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, Wrapper

public class CassandraTable
extends AbstractQueryableTable
implements TranslatableTable

Table based on a Cassandra column family

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.util.List<RelFieldCollation>	clusteringOrder
private java.lang.String	columnFamily
(package private) Pair<java.util.List<java.lang.String>,java.util.List<java.lang.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	Description
CassandraTable(CassandraSchema schema, java.lang.String columnFamily)
CassandraTable(CassandraSchema schema, java.lang.String columnFamily, boolean view)

Method Summary

Modifier and Type	Method	Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, java.lang.String tableName)	Converts this table into a Queryable.
java.util.List<RelFieldCollation>	getClusteringOrder()
Pair<java.util.List<java.lang.String>,java.util.List<java.lang.String>>	getKeyFields()
RelDataType	getRowType(RelDataTypeFactory typeFactory)	Returns this table's row type.
Enumerable<java.lang.Object>	query(com.datastax.driver.core.Session session)
Enumerable<java.lang.Object>	query(com.datastax.driver.core.Session session, java.util.List<java.util.Map.Entry<java.lang.String,java.lang.Class>> fields, java.util.List<java.util.Map.Entry<java.lang.String,java.lang.String>> selectFields, java.util.List<java.lang.String> predicates, java.util.List<java.lang.String> order, java.lang.Integer offset, java.lang.Integer fetch)	Executes a CQL query on the underlying table.
RelNode	toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable)	Converts this table into a relational expression.
java.lang.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, isRolledUp, rolledUpColumnValidInsideAgg, unwrap

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, isRolledUp, rolledUpColumnValidInsideAgg

Field Detail

protoRowType

RelProtoDataType protoRowType

keyFields

Pair<java.util.List<java.lang.String>,java.util.List<java.lang.String>> keyFields

clusteringOrder

java.util.List<RelFieldCollation> clusteringOrder

schema

private final CassandraSchema schema

columnFamily

private final java.lang.String columnFamily

view

private final boolean view

Constructor Detail

CassandraTable

public CassandraTable(CassandraSchema schema,
                      java.lang.String columnFamily,
                      boolean view)

CassandraTable

public CassandraTable(CassandraSchema schema,
                      java.lang.String columnFamily)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

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.

Specified by:

getRowType in interface Table

Parameters:

typeFactory - Type factory with which to create the type

Returns:

Row type

getKeyFields

public Pair<java.util.List<java.lang.String>,java.util.List<java.lang.String>> getKeyFields()

getClusteringOrder

public java.util.List<RelFieldCollation> getClusteringOrder()

query

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

query

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

Description copied from interface: QueryableTable

Converts this table into a Queryable.

Specified by:

asQueryable in interface QueryableTable

toRel

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

Description copied from interface: TranslatableTable

Converts this table into a relational expression.

Specified by:

toRel in interface TranslatableTable