Package org.apache.druid.query.datasourcemetadata

Class DataSourceMetadataQuery

java.lang.Object

org.apache.druid.query.BaseQuery<Result<DataSourceMetadataResultValue>>

org.apache.druid.query.datasourcemetadata.DataSourceMetadataQuery

All Implemented Interfaces:

Query<Result<DataSourceMetadataResultValue>>

public class DataSourceMetadataQuery
extends BaseQuery<Result<DataSourceMetadataResultValue>>

Field Summary

Fields inherited from class org.apache.druid.query.BaseQuery

QUERY_ID, SQL_QUERY_ID, SUB_QUERY_ID

Fields inherited from interface org.apache.druid.query.Query

DATASOURCE_METADATA, GROUP_BY, SCAN, SEARCH, SEGMENT_METADATA, SELECT, TIME_BOUNDARY, TIMESERIES, TOPN, UNION_QUERY, WINDOW_OPERATOR

Constructor Summary

Constructors

Constructor	Description
DataSourceMetadataQuery(DataSource dataSource, QuerySegmentSpec querySegmentSpec, Map<String,Object> context)

Method Summary

Modifier and Type	Method	Description
Iterable<Result<DataSourceMetadataResultValue>>	buildResult(org.joda.time.DateTime timestamp, org.joda.time.DateTime maxIngestedEventTime)
DimFilter	getFilter()
String	getType()
boolean	hasFilters()
Iterable<Result<DataSourceMetadataResultValue>>	mergeResults(List<Result<DataSourceMetadataResultValue>> results)
String	toString()
Query<Result<DataSourceMetadataResultValue>>	withDataSource(DataSource dataSource)
DataSourceMetadataQuery	withOverriddenContext(Map<String,Object> contextOverrides)
DataSourceMetadataQuery	withQuerySegmentSpec(QuerySegmentSpec spec)	Returns a new query, identical to this one, but with a different associated QuerySegmentSpec.

Methods inherited from class org.apache.druid.query.BaseQuery

calculateDuration, checkInterrupted, computeOverriddenContext, computeOverridenContext, context, equals, getContext, getDataSource, getDuration, getGranularity, getId, getIntervals, getQuerySegmentSpec, getResultOrdering, getRunner, getSubQueryId, getTimezone, hashCode, withId, withSqlQueryId, withSubQueryId

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.druid.query.Query

getContextBoolean, getContextHumanReadableBytes, getContextValue, getMostSpecificId, getRequiredColumns, getResultRowSignature, getResultRowSignature, getSingleInterval, getSqlQueryId, getVirtualColumns, mayCollapseQueryDataSource, optimizeForSegment, withDefaultSubQueryId, withLane, withPriority

Constructor Details

DataSourceMetadataQuery

public DataSourceMetadataQuery(DataSource dataSource,
 QuerySegmentSpec querySegmentSpec,
 Map<String,Object> context)

Method Details

hasFilters

public boolean hasFilters()

getFilter

public DimFilter getFilter()

getType

public String getType()

withOverriddenContext

public DataSourceMetadataQuery withOverriddenContext(Map<String,Object> contextOverrides)

withQuerySegmentSpec

public DataSourceMetadataQuery withQuerySegmentSpec(QuerySegmentSpec spec)

Description copied from interface: Query

Returns a new query, identical to this one, but with a different associated QuerySegmentSpec.

This often changes the behavior of Query.getRunner(QuerySegmentWalker), since most queries inherit that method from BaseQuery, which implements it by calling QuerySegmentSpec.lookup(org.apache.druid.query.Query<T>, org.apache.druid.query.QuerySegmentWalker).

withDataSource

public Query<Result<DataSourceMetadataResultValue>> withDataSource(DataSource dataSource)

buildResult

public Iterable<Result<DataSourceMetadataResultValue>> buildResult(org.joda.time.DateTime timestamp,
 org.joda.time.DateTime maxIngestedEventTime)

mergeResults

public Iterable<Result<DataSourceMetadataResultValue>> mergeResults(List<Result<DataSourceMetadataResultValue>> results)

toString

public String toString()

Overrides:

toString in class Object