public abstract class MaxAggFunction extends DeclarativeAggregateFunction
Modifier and Type | Class and Description |
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static class |
MaxAggFunction.BooleanMaxAggFunction
Built-in Boolean Max aggregate function.
|
static class |
MaxAggFunction.ByteMaxAggFunction
Built-in Byte Max aggregate function.
|
static class |
MaxAggFunction.DateMaxAggFunction
Built-in Date Max aggregate function.
|
static class |
MaxAggFunction.DecimalMaxAggFunction
Built-in Decimal Max aggregate function.
|
static class |
MaxAggFunction.DoubleMaxAggFunction
Built-in Double Max aggregate function.
|
static class |
MaxAggFunction.FloatMaxAggFunction
Built-in Float Max aggregate function.
|
static class |
MaxAggFunction.IntMaxAggFunction
Built-in Int Max aggregate function.
|
static class |
MaxAggFunction.LongMaxAggFunction
Built-in Long Max aggregate function.
|
static class |
MaxAggFunction.ShortMaxAggFunction
Built-in Short Max aggregate function.
|
static class |
MaxAggFunction.StringMaxAggFunction
Built-in String Max aggregate function.
|
static class |
MaxAggFunction.TimeMaxAggFunction
Built-in Time Max aggregate function.
|
static class |
MaxAggFunction.TimestampLtzMaxAggFunction
Built-in TimestampLtz Max aggregate function.
|
static class |
MaxAggFunction.TimestampMaxAggFunction
Built-in Timestamp Max aggregate function.
|
Constructor and Description |
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MaxAggFunction() |
Modifier and Type | Method and Description |
---|---|
Expression[] |
accumulateExpressions()
Expressions for accumulating the mutable aggregation buffer based on an input row.
|
UnresolvedReferenceExpression[] |
aggBufferAttributes()
All fields of the aggregate buffer.
|
DataType[] |
getAggBufferTypes()
All types of the aggregate buffer.
|
Expression |
getValueExpression()
An expression which returns the final value for this aggregate function.
|
Expression[] |
initialValuesExpressions()
Expressions for initializing empty aggregation buffers.
|
Expression[] |
mergeExpressions()
A sequence of expressions for merging two aggregation buffers together.
|
int |
operandCount()
How many operands your function will deal with.
|
Expression[] |
retractExpressions()
Expressions for retracting the mutable aggregation buffer based on an input row.
|
getKind, getResultType, getTypeInference, mergeOperand, mergeOperands, operand, operands
close, functionIdentifier, open, toString
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
getRequirements, isDeterministic, supportsConstantFolding
public int operandCount()
DeclarativeAggregateFunction
operandCount
in class DeclarativeAggregateFunction
public UnresolvedReferenceExpression[] aggBufferAttributes()
DeclarativeAggregateFunction
aggBufferAttributes
in class DeclarativeAggregateFunction
public DataType[] getAggBufferTypes()
DeclarativeAggregateFunction
getAggBufferTypes
in class DeclarativeAggregateFunction
public Expression[] initialValuesExpressions()
DeclarativeAggregateFunction
initialValuesExpressions
in class DeclarativeAggregateFunction
public Expression[] accumulateExpressions()
DeclarativeAggregateFunction
accumulateExpressions
in class DeclarativeAggregateFunction
public Expression[] retractExpressions()
DeclarativeAggregateFunction
retractExpressions
in class DeclarativeAggregateFunction
public Expression[] mergeExpressions()
DeclarativeAggregateFunction
attributeName
and mergeOperand(attributeName)
to refer to the attributes corresponding to each of the buffers
being merged.mergeExpressions
in class DeclarativeAggregateFunction
public Expression getValueExpression()
DeclarativeAggregateFunction
getValueExpression
in class DeclarativeAggregateFunction
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