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

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.lang.String	coordinatorUrl
private boolean	discoverTables
private java.util.Map<java.lang.String,Table>	tableMap
(package private) java.lang.String	url

Constructor Summary

Constructors

Constructor	Description
DruidSchema(java.lang.String url, java.lang.String coordinatorUrl, boolean discoverTables)	Creates a Druid schema.

Method Summary

Modifier and Type	Method	Description
protected java.util.Map<java.lang.String,Table>	getTableMap()	Returns a map of tables in this schema by name.
private Table	table(java.lang.String tableName, DruidConnectionImpl connection)

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

Field Detail

url

final java.lang.String url

coordinatorUrl

final java.lang.String coordinatorUrl

discoverTables

private final boolean discoverTables

tableMap

private java.util.Map<java.lang.String,Table> tableMap

Constructor Detail

DruidSchema

public DruidSchema(java.lang.String url,
                   java.lang.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 Detail

getTableMap

protected java.util.Map<java.lang.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

table

private Table table(java.lang.String tableName,
                    DruidConnectionImpl connection)