Package net.esper.eql.expression

This package contains the EQL expression nodes that represent all expressions such as used in select clauses, group-by and having clauses, or order-by clauses

See:
Description

Interface Summary

ExprEvaluator	Interface for evaluating of an event tuple.
ExprNodeVisitor	Visitor interface for use with expression node trees.
ExprValidator	Validation interface for expression nodes.

Class Summary

ExprAggregateNode	Base expression node that represents an aggregation function such as 'sum' or 'count'.
ExprAndNode	Represents an And-condition.
ExprArrayNode	Represents an array in a filter expressiun tree.
ExprAvedevNode	Represents the avedev(...) aggregate function is an expression tree.
ExprAvgNode	Represents the avg(...) aggregate function is an expression tree.
ExprBetweenNode	Represents the between-clause function in an expression tree.
ExprBitWiseNode	Represents the bit-wise operators in an expression tree.
ExprCaseNode	Represents the case-when-then-else control flow function is an expression tree.
ExprCoalesceNode	Represents the COALESCE(a,b,...) function is an expression tree.
ExprConcatNode	Represents a simple Math (+/-/divide/*) in a filter expression tree.
ExprConstantNode	Represents a constant in a filter expressiun tree.
ExprCountNode	Represents the count(...) and count(*) and count(distinct ...) aggregate function is an expression tree.
ExprEqualsNode	Represents an equals (=) comparator in a filter expressiun tree.
ExprIdentNode	Represents an stream property identifier in a filter expressiun tree.
ExprInNode	Represents the in-clause (set check) function in an expression tree.
ExprLikeNode	Represents the like-clause in an expression tree.
ExprMathNode	Represents a simple Math (+/-/divide/*) in a filter expression tree.
ExprMedianNode	Represents the median(...) aggregate function is an expression tree.
ExprMinMaxAggrNode	Represents the min/max(distinct? ...) aggregate function is an expression tree.
ExprMinMaxRowNode	Represents the MAX(a,b) and MIN(a,b) functions is an expression tree.
ExprNode	Superclass for filter nodes in a filter expression tree.
ExprNode.MappedPropertyParseResult	Encapsulates the parse result parsing a mapped property as a class and method name with args.
ExprNodeIdentifierVisitor	Visitor that collects event property identifier information under expression nodes.
ExprNodeSubselectVisitor	Visitor that collects ExprSubselectNode instances.
ExprNotNode	Represents a NOT expression in an expression tree.
ExprOrNode	Represents an OR expression in a filter expression tree.
ExprPlugInAggFunctionNode	Represents a custom aggregation function in an expresson tree.
ExprPreviousNode	Represents the 'prev' previous event function in an expression node tree.
ExprPriorNode	Represents the 'prior' prior event function in an expression node tree.
ExprRegexpNode	Represents the regexp-clause in an expression tree.
ExprRelationalOpNode	Represents a lesser or greater then (/>=) expression in a filter expression tree.
ExprStaticMethodNode	Represents an invocation of a static library method in the expression tree.
ExprStddevNode	Represents the stddev(...) aggregate function is an expression tree.
ExprSubselectExistsNode	Represents an exists-subselect in an expression tree.
ExprSubselectInNode	Represents a subselect in an expression tree.
ExprSubselectNode	Represents a subselect in an expression tree.
ExprSubselectRowNode	Represents a subselect in an expression tree.
ExprSumNode	Represents the sum(...) aggregate function is an expression tree.

Exception Summary

ExprValidationException

Thrown to indicate a validation error in a filter expression.

Package net.esper.eql.expression Description

This package contains the EQL expression nodes that represent all expressions such as used in select clauses, group-by and having clauses, or order-by clauses