AggregateFcts.CountRowsFunction (apache-cassandra API)

java.lang.Object
- org.apache.cassandra.cql3.functions.AbstractFunction
- - org.apache.cassandra.cql3.functions.NativeFunction
  - - org.apache.cassandra.cql3.functions.NativeAggregateFunction
    - - org.apache.cassandra.cql3.functions.AggregateFcts.CountRowsFunction

All Implemented Interfaces:

AssignmentTestable, AggregateFunction, Function

Enclosing class:

AggregateFcts
```
public static class AggregateFcts.CountRowsFunction
extends NativeAggregateFunction
```

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.functions.AggregateFunction
  AggregateFunction.Aggregate
- Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable
  AssignmentTestable.TestResult

Field Summary
- Fields inherited from class org.apache.cassandra.cql3.functions.AbstractFunction
  argTypes, name, returnType
- Fields inherited from interface org.apache.cassandra.cql3.functions.Function
  UNRESOLVED

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`columnName(java.util.List<java.lang.String> columnNames)`	Returns the name of the function to use within a ResultSet.
`AggregateFunction.Aggregate`	`newAggregate()`	Creates a new `Aggregate` instance.
`NativeFunction`	`withLegacyName()`	Returns a copy of this function using its old pre-5.0 name before the adoption of snake-cased function names.

Methods inherited from class org.apache.cassandra.cql3.functions.NativeAggregateFunction
isAggregate

Methods inherited from class org.apache.cassandra.cql3.functions.NativeFunction
isNative, isPure, newArguments

Methods inherited from class org.apache.cassandra.cql3.functions.AbstractFunction
addFunctionsTo, argTypes, argumentsList, elementKeyspace, elementName, equals, getCompatibleTypeIfKnown, hashCode, name, referencesUserType, returnType, testAssignment, toCqlString, toString, typesMatch

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.cassandra.cql3.AssignmentTestable
getCompatibleTypeIfKnown, testAssignment

Methods inherited from interface org.apache.cassandra.cql3.functions.Function
addFunctionsTo, argTypes, compare, isNative, isPure, name, newArguments, referencesUserType, returnType

- Method Detail
  - newAggregate
```
public AggregateFunction.Aggregate newAggregate()
```
    Description copied from interface: AggregateFunction
    
    Creates a new Aggregate instance.
    
    Returns:
    
    a new Aggregate instance.
  - columnName
```
public java.lang.String columnName(java.util.List<java.lang.String> columnNames)
```
    Description copied from interface: Function
    
    Returns the name of the function to use within a ResultSet.
    
    Specified by:
    
    columnName in interface Function
    
    Overrides:
    
    columnName in class AbstractFunction
    
    Parameters:
    
    columnNames - the names of the columns used to call the function
    
    Returns:
    
    the name of the function to use within a ResultSet
  - withLegacyName
```
public NativeFunction withLegacyName()
```
    Description copied from class: NativeFunction
    
    Returns a copy of this function using its old pre-5.0 name before the adoption of snake-cased function names. Those naming conventions were adopted in 5.0, but we still need to support the old names for compatibility. See CASSANDRA-18037 for further details.
    
    Overrides:
    
    withLegacyName in class NativeFunction
    
    Returns:
    
    a copy of this function using its old pre-5.0 deprecated name, or null if the pre-5.0 function name already satisfied the naming conventions.