class XxxAggrOpSpec

Generic spec of various aggregate functions as iterative computations

Inheritance:

Public

Abstract functions defining the behavior of the aggregate function virtual XxxErrCode Init (const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl) / initialize virtual XxxErrCode Accum (const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl) / add a value to the aggregate virtual XxxErrCode Drop (const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl) / drop a value from an aggregate virtual XxxErrCode Terminate (const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl, XxxADTValue *FinalVal) / perform final computation, reclaim any state stored in handle

Abstract functions defining the behavior of the aggregate function

virtual XxxErrCode Init(const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl)

/ initialize

virtual XxxErrCode Accum(const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl)

/ add a value to the aggregate

virtual XxxErrCode Drop(const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl)

/ drop a value from an aggregate

virtual XxxErrCode Terminate(const XxxFuncExpression::AggrPlan* APlan, XxxAggrOpHandle& Hndl, XxxADTValue *FinalVal)

/ perform final computation, reclaim any state stored in handle

Direct child classes:

XxxSimpleOpSpec
XxxAvgOpSpec

alphabetic index hierarchy of classes

this page has been generated automatically by doc++

(c)opyright by Malte Zöckler, Roland Wunderling
contact: doc++@zib.de