bool ForIterator::nextImpl(store::Item_t& aResult, PlanState& aPlanState) const
{
ForState* lState;
store::Item_t lItem;
DEFAULT_STACK_INIT(ForState, lState, aPlanState);
while (consumeNext(aResult, theChild0, aPlanState))
{
while (consumeNext(lItem, theChild1, aPlanState))
{
bindVariables(lItem, theVarRefs, aPlanState);
if (theHasPosVars)
{
store::Item_t lPosItem;
GENV_ITEMFACTORY->createInteger(lPosItem,
xs_integer(lState->incReturnPosition()));
bindVariables(lPosItem, thePosVarRefs, aPlanState);
}
STACK_PUSH(true, lState);
}
lState->resetPosition();
theChild1->reset(aPlanState);
}
STACK_END(lState);
}
/*******************************************************************************
Binds the variables outside the window clause.
@param planState The PlanState
@param inputSeq The underlying input sequence
@param pos The position of the current item within the input sequence
(counting starts with 1).
********************************************************************************/
void WindowVars::bindExtern(
PlanState& planState,
const store::TempSeq_t& inputSeq,
const ulong pos) const
{
store::Item_t item;
if (!theCurOuterVars.empty())
{
inputSeq->getItem(xs_integer(pos), item);
bindVariables(item, theCurOuterVars, planState);
}
if (!thePrevOuterVars.empty())
{
if (pos > 1)
inputSeq->getItem(xs_integer(pos - 1), item);
else
item = NULL;
bindVariables(item, thePrevOuterVars, planState);
}
if (!theNextOuterVars.empty())
{
inputSeq->getItem(xs_integer(pos + 1), item);
bindVariables(item, theNextOuterVars, planState);
}
if (!thePosOuterVars.empty())
{
GENV_ITEMFACTORY->createInteger(item, Integer(pos));
bindVariables(item, thePosOuterVars, planState);
}
}