Package com.espertech.esper.common.client.soda

Class CountStarProjectionExpression

java.lang.Object

com.espertech.esper.common.client.soda.ExpressionBase

com.espertech.esper.common.client.soda.CountStarProjectionExpression

All Implemented Interfaces:

Expression, Serializable

public class CountStarProjectionExpression
extends ExpressionBase

Count of (distinct) rows, equivalent to "count(*)"

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
CountStarProjectionExpression()	Ctor - for use to create an expression tree, without inner expression.

Method Summary

Modifier and Type	Method	Description
ExpressionPrecedenceEnum	getPrecedence()	Returns precedence.
void	toPrecedenceFreeEPL(StringWriter writer)	Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Methods inherited from class com.espertech.esper.common.client.soda.ExpressionBase

addChild, getChildren, getTreeObjectName, renderAggregation, setChildren, setTreeObjectName, toEPL, toPrecedenceFreeEPL, toPrecedenceFreeEPL

Methods inherited from class java.lang.Object

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

Constructor Details

CountStarProjectionExpression

public CountStarProjectionExpression()

Ctor - for use to create an expression tree, without inner expression.

Method Details

getPrecedence

public ExpressionPrecedenceEnum getPrecedence()

Description copied from interface: Expression

Returns precedence.

Returns:

precedence

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Description copied from class: ExpressionBase

Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Specified by:

toPrecedenceFreeEPL in class ExpressionBase

Parameters:

writer - is the output to use