Package org.apache.calcite.adapter.druid

Class DruidSchema

java.lang.Object

org.apache.calcite.schema.impl.AbstractSchema

org.apache.calcite.adapter.druid.DruidSchema

All Implemented Interfaces:

Schema

public class DruidSchema
extends AbstractSchema

Schema mapped onto a Druid instance.

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
DruidSchema(String url, String coordinatorUrl, boolean discoverTables)	Creates a Druid 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

DruidSchema

public DruidSchema(String url,
 String coordinatorUrl,
 boolean discoverTables)

Creates a Druid schema.

Parameters:

url - URL of query REST service, e.g. "http://localhost:8082"

coordinatorUrl - URL of coordinator REST service, e.g. "http://localhost:8081"

discoverTables - If true, ask Druid what tables exist; if false, only create tables explicitly in the model

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