org.apache.metamodel.query

Interface FunctionType

All Known Subinterfaces:

AggregateFunction, ScalarFunction

All Known Implementing Classes:

AverageAggregateFunction, CountAggregateFunction, DefaultAggregateFunction, DefaultScalarFunction, LegacyDeserializationObjectInputStream.LegacyFunctionType, MaxAggregateFunction, MinAggregateFunction, SumAggregateFunction, ToBooleanFunction, ToDateFunction, ToNumberFunction, ToStringFunction

public interface FunctionType

Represents a generic function to use in a SelectItem.

See Also:

SelectItem

Field Summary

Fields

Modifier and Type	Field and Description
static AggregateFunction	AVG
static AggregateFunction	COUNT
static AggregateFunction	MAX
static AggregateFunction	MIN
static AggregateFunction	SUM
static ScalarFunction	TO_BOOLEAN
static ScalarFunction	TO_DATE
static ScalarFunction	TO_NUMBER
static ScalarFunction	TO_STRING

Method Summary

Methods

Modifier and Type	Method and Description
ColumnType	getExpectedColumnType(ColumnType type)
String	getFunctionName()

Field Detail

COUNT

static final AggregateFunction COUNT

AVG

static final AggregateFunction AVG

SUM

static final AggregateFunction SUM

MAX

static final AggregateFunction MAX

MIN

static final AggregateFunction MIN

TO_STRING

static final ScalarFunction TO_STRING

TO_NUMBER

static final ScalarFunction TO_NUMBER

TO_DATE

static final ScalarFunction TO_DATE

TO_BOOLEAN

static final ScalarFunction TO_BOOLEAN

Method Detail

getExpectedColumnType

ColumnType getExpectedColumnType(ColumnType type)

getFunctionName

String getFunctionName()