Package net.esper.client.soda

This package defines the Esper statement object model.

See:
Description

Interface Summary

Expression	Interface representing an expression for use in select-clauses, where-clauses, having-clauses, order-by clauses and streams based on filters and pattern filter expressions.
PatternExpr	Interface representing a pattern expression.

Class Summary

ArithmaticExpression	Arithmatic expression for addition, subtraction, multiplication, division and modulo.
ArrayExpression	Array expression forms array results, similar to the EQL syntax of "{element 1, element 2, ...
AvedevProjectionExpression	Mean deviation of the (distinct) values returned by an expression.
AvgProjectionExpression	Average of the (distinct) values returned by an expression.
BetweenExpression	Between checks that a given value is in a range between a low endpoint and a high endpoint.
BitwiseOpExpression	Bitwise (binary) operator for binary AND, binary OR and binary XOR.
CaseSwitchExpression	Case-expression that acts as a switch testing a value against other values.
CaseWhenThenExpression	Case expression that act as a when-then-else.
CastExpression	Cast expression casts the return value of an expression to a specified type.
CoalesceExpression	Coalesce-function which returns the first non-null value in a list of values.
ConcatExpression	Concatenation expression that concatenates the result of child expressions to the expression.
Conjunction	Conjunction represents a logical AND allowing multiple sub-expressions to be connected by AND.
ConstantExpression	Constant value returns a fixed value for use in expressions.
CountProjectionExpression	Count of the (distinct) values returned by an expression, equivalent to "count(distinct property)"
CountStarProjectionExpression	Count of (distinct) rows, equivalent to "count(*)"
CurrentTimestampExpression	Current timestamp supplies the current engine time in an expression.
Disjunction	Disjunction represents a logical OR allowing multiple sub-expressions to be connected by OR.
EPBaseNamedObject	Base class for named engine objects such as views, patterns guards and observers.
EPStatementObjectModel	Object model of an EQL statement.
ExpressionBase	Base expression.
Expressions	Convenience factory for creating Expression instances.
Filter	Filter defines the event type to be filtered for, and an optional expression that returns true if the filter should consider the event, or false to reject the event.
FilterStream	A stream upon which projections (views) can be added that selects events by name and filter expression.
FromClause	The from-clause names the streams to select upon.
GroupByClause	The group-by clause consists of a list of expressions that provide the grouped-by values.
InExpression	In-expresson checks that a value is in (or not in) a set of values, equivalent to the syntax "color in ('red', 'blue')".
InsertIntoClause	An insert-into clause consists of a stream name and column names and an optional stream selector.
InstanceOfExpression	Instance-of expression checks if an expression returns a certain type.
Junction	Base junction for conjunction (and) and disjunction (or).
LikeExpression	SQL-Like expression for matching '%' and '_' wildcard strings following SQL standards.
MaxProjectionExpression	Maximum of the (distinct) values returned by an expression.
MaxRowExpression	Maximum-value per-row expression (not aggregating) determines the maximum value among a set of values.
MedianProjectionExpression	Median projection (aggregation) in the distinct and regular form.
MinProjectionExpression	Minimum of the (distinct) values returned by an expression.
MinRowExpression	Minimum-value per-row expression (not aggregating) determines the minimum value among a set of values.
NotExpression	Negates the contained-within subexpression.
OrderByClause	An order-by clause consists of expressions and flags indicating if ascending or descending.
OrderByElement	A single entry in an order-by clause consisting of an expression and order ascending or descending flag.
OuterJoinQualifier	Qualifies a join by providing the outer join type (full/left/right) and joined-on properties.
OutputLimitClause	An output limit clause defines how to limit output of statements and consists of a selector specifiying which events to select to output, a frequency and a unit.
PatternAndExpr	Logical AND for use in pattern expressions.
PatternEveryExpr	Pattern 'every' expression that controls the lifecycle of pattern sub-expressions.
PatternExprBase	Abstract base class for all pattern expressions.
PatternFilterExpr	Filter for use in pattern expressions.
PatternFollowedByExpr	Followed-by for use in pattern expressions.
PatternGuardExpr	Guard is the where timer-within pattern object for use in pattern expressions.
PatternNotExpr	Not-expression for negating a pattern sub-expression for use in pattern expressions.
PatternObserverExpr	Pattern observer expression observes occurances such as timer-at (crontab) and timer-interval.
PatternOrExpr	Logical OR for use in pattern expressions.
Patterns	Convenience factory for creating PatternExpr instances, which represent pattern expression trees.
PatternStream	A stream of events that is generated by pattern matches.
PlugInProjectionExpression	Represents a plug-in aggregation function.
PreviousExpression	Previous function for obtaining property values of previous events.
PriorExpression	Expression representing the prior function.
ProjectedStream	Abstract base class for streams that can be projected via views providing data window, uniqueness or other projections or deriving further information from streams.
PropertyExistsExpression	Property-exists checks if a dynamic property exists.
PropertyValueExpression	Expression returning a property value.
RegExpExpression	Regular expression evaluates a "regexp" regular expression.
RelationalOpExpression	Comparison using one of the relational operators (=, !=, <, <=, >, >=).
SelectClause	A select-clause consists of selection expressions and optionally an indicator that a wildcard is selected and an optional stream selector.
SelectClauseElement	Part of a select-clause to describe individual select-clause expressions.
SQLStream	An SQL stream that polls via SQL for events via join.
StaticMethodExpression	Static method call consists of a class name and method name.
StddevProjectionExpression	Standard deviation of the (distinct) values returned by an expression.
Stream	An abstract base class for a named or unnamed stream.
SubqueryExistsExpression	Exists-expression for a set of values returned by a subquery.
SubqueryExpression	Subquery-expression returns values returned by a subquery modelled by a further EPStatementObjectModel.
SubqueryInExpression	In-expression for a set of values returned by a subquery.
SumProjectionExpression	Sum of the (distinct) values returned by an expression.
View	A view provides a projection upon a stream, such as a data window, grouping or unique.

Enum Summary

OutputLimitSelector	Selector for use in output rate limiting.
OutputLimitUnit	Unit for output rate limiting.
StreamSelector	Enumeration for representing selection of the remove stream or the insert stream, or both.

Package net.esper.client.soda Description

This package defines the Esper statement object model.