io.prestosql.operator.aggregation

Class CountColumn

java.lang.Object

io.prestosql.metadata.SqlAggregationFunction

io.prestosql.operator.aggregation.CountColumn

All Implemented Interfaces:

SqlFunction

public class CountColumn
extends SqlAggregationFunction

Field Summary

Fields

Modifier and Type	Field and Description
static CountColumn	COUNT_COLUMN

Constructor Summary

Constructors

Constructor and Description
CountColumn()

Method Summary

Modifier and Type	Method and Description
static void	combine(LongState state, LongState otherState)
String	getDescription()
static void	input(LongState state, Block block, int index)
static void	output(LongState state, BlockBuilder out)
InternalAggregationFunction	specialize(BoundVariables boundVariables, int arity, TypeManager typeManager, FunctionRegistry functionRegistry)

Methods inherited from class io.prestosql.metadata.SqlAggregationFunction

createFunctionByAnnotations, createFunctionsByAnnotations, getSignature, isDeterministic, isHidden

Methods inherited from class java.lang.Object

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

Field Detail

COUNT_COLUMN

public static final CountColumn COUNT_COLUMN

Constructor Detail

CountColumn

public CountColumn()

Method Detail

getDescription

public String getDescription()

specialize

public InternalAggregationFunction specialize(BoundVariables boundVariables,
                                              int arity,
                                              TypeManager typeManager,
                                              FunctionRegistry functionRegistry)

Specified by:

specialize in class SqlAggregationFunction

input

public static void input(LongState state,
                         Block block,
                         int index)

combine

public static void combine(LongState state,
                           LongState otherState)

output

public static void output(LongState state,
                          BlockBuilder out)