Package org.apache.pinot.segment.local.segment.index.loader.invertedindex

Class FSTIndexHandler

java.lang.Object

org.apache.pinot.segment.local.segment.index.loader.BaseIndexHandler

org.apache.pinot.segment.local.segment.index.loader.invertedindex.FSTIndexHandler

All Implemented Interfaces:

IndexHandler

public class FSTIndexHandler
extends BaseIndexHandler

Helper class for fst indexes used by SegmentPreProcessor. to create FST index for column during segment load time. Currently FST index is always created (if enabled on a column) during segment generation (1) A new segment with FST index is created/refreshed. Server loads the segment. The handler detects the existence of FST index and returns. (2) A reload is issued on an existing segment with existing FST index. The handler detects the existence of FST index and returns. (3) A reload is issued on an existing segment after FST index is enabled on an existing column. Reads the dictionary to create FST index. (4) A reload is issued on an existing segment after FST index is enabled on a newly added column. In this case, the default column handler would have taken care of adding dictionary for the new column. Read the dictionary to create FST index.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.pinot.segment.spi.index.IndexHandler

IndexHandler.NoOp

Field Summary

Fields inherited from class org.apache.pinot.segment.local.segment.index.loader.BaseIndexHandler

_fieldIndexConfigs, _segmentDirectory, _tableConfig, _tmpForwardIndexColumns

Constructor Summary

Constructors

Constructor	Description
FSTIndexHandler(SegmentDirectory segmentDirectory, Map<String,FieldIndexConfigs> fieldIndexConfigs, TableConfig tableConfig)

Method Summary

Modifier and Type	Method	Description
boolean	needUpdateIndices(SegmentDirectory.Reader segmentReader)
void	postUpdateIndicesCleanup(SegmentDirectory.Writer segmentWriter)
void	updateIndices(SegmentDirectory.Writer segmentWriter)

Methods inherited from class org.apache.pinot.segment.local.segment.index.loader.BaseIndexHandler

createForwardIndexIfNeeded

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FSTIndexHandler

public FSTIndexHandler(SegmentDirectory segmentDirectory,
                       Map<String,FieldIndexConfigs> fieldIndexConfigs,
                       @Nullable
                       TableConfig tableConfig)

Method Detail

needUpdateIndices

public boolean needUpdateIndices(SegmentDirectory.Reader segmentReader)

updateIndices

public void updateIndices(SegmentDirectory.Writer segmentWriter)
                   throws Exception

Throws:

Exception

postUpdateIndicesCleanup

public void postUpdateIndicesCleanup(SegmentDirectory.Writer segmentWriter)
                              throws Exception

Specified by:

postUpdateIndicesCleanup in interface IndexHandler

Overrides:

postUpdateIndicesCleanup in class BaseIndexHandler

Throws:

Exception