Package org.infinispan.server.resp.commands.sortedset

Class ZINTERCARD

java.lang.Object

org.infinispan.server.resp.RespCommand

org.infinispan.server.resp.commands.sortedset.ZINTERCARD

All Implemented Interfaces:

Resp3Command

public class ZINTERCARD
extends RespCommand
implements Resp3Command

This command is similar to ZINTER, but instead of returning the resulting sorted set, it returns just the cardinality of the result. Keys that do not exist are considered to be empty sets. With one of the keys being an empty set, the resulting set is also empty (since set intersection with an empty set always results in an empty set). By default, the command calculates the cardinality of the intersection of all given sets. When provided with the optional LIMIT argument (which defaults to 0 and means unlimited), if the intersection cardinality reaches limit partway through the computation, the algorithm will exit and yield limit as the cardinality. Such implementation ensures a significant speedup for queries where the limit is lower than the actual intersection cardinality.

Since:

15.0

See Also:

• Redis Documentation

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LIMIT

Fields inherited from class org.infinispan.server.resp.RespCommand

log

Constructor Summary

Constructors

Constructor	Description
ZINTERCARD()

Method Summary

Modifier and Type	Method	Description
CompletionStage<RespRequestHandler>	perform(Resp3Handler handler, io.netty.channel.ChannelHandlerContext ctx, List<byte[]> arguments)

Methods inherited from class org.infinispan.server.resp.RespCommand

extractKeys, fromByteBuf, getArity, getFirstKeyPos, getLastKeyPos, getName, getSteps, handleException, hasValidNumberOfArguments, match, size, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.server.resp.commands.Resp3Command

handleException

Field Details

LIMIT

public static final String LIMIT

See Also:

• Constant Field Values

Constructor Details

ZINTERCARD

public ZINTERCARD()

Method Details

perform

public CompletionStage<RespRequestHandler> perform(Resp3Handler handler,
 io.netty.channel.ChannelHandlerContext ctx,
 List<byte[]> arguments)

Specified by:

perform in interface Resp3Command