org.apache.calcite.adapter.elasticsearch

Class AbstractElasticsearchTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

org.apache.calcite.adapter.java.AbstractQueryableTable

org.apache.calcite.adapter.elasticsearch.AbstractElasticsearchTable

All Implemented Interfaces:

QueryableTable, Table, TranslatableTable, Wrapper

public abstract class AbstractElasticsearchTable
extends AbstractQueryableTable
implements TranslatableTable

Table based on an Elasticsearch type.

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field and Description
protected String	indexName
protected String	typeName

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

elementType

Constructor Summary

Constructors

Constructor and Description
AbstractElasticsearchTable(String indexName, String typeName) Creates an ElasticsearchTable.

Method Summary

Modifier and Type	Method and Description
<T> Queryable<T>	asQueryable(QueryProvider queryProvider, SchemaPlus schema, String tableName) Converts this table into a Queryable.
protected abstract Enumerable<Object>	find(String index, List<String> ops, List<Map.Entry<String,Class>> fields) Executes a "find" operation on the underlying type.
RelDataType	getRowType(RelDataTypeFactory relDataTypeFactory) Returns this table's row type.
RelNode	toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable) Converts this table into a relational expression.
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

indexName

protected final String indexName

typeName

protected final String typeName

Constructor Detail

AbstractElasticsearchTable

public AbstractElasticsearchTable(String indexName,
                                  String typeName)

Creates an ElasticsearchTable.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getRowType

public RelDataType getRowType(RelDataTypeFactory relDataTypeFactory)

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:

relDataTypeFactory - Type factory with which to create the type

Returns:

Row type

asQueryable

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

find

protected abstract Enumerable<Object> find(String index,
                                           List<String> ops,
                                           List<Map.Entry<String,Class>> fields)

Executes a "find" operation on the underlying type.

For example, client.prepareSearch(index).setTypes(type) .setSource("{\"fields\" : [\"state\"]}")

Parameters:

index - Elasticsearch index

ops - List of operations represented as Json strings.

fields - List of fields to project; or null to return map

Returns:

Enumerator of results