IHqlExpression * CMemberInfo::addDatasetLimits(HqlCppTranslator & translator, BuildCtx & ctx, IReferenceSelector * selector, IHqlExpression * _value)
{
LinkedHqlExpr value = _value;
IHqlExpression * choosen = column->queryAttribute(choosenAtom);
if (choosen)
{
LinkedHqlExpr choosenValue = choosen->queryChild(0);
if (!choosenValue->queryValue())
{
OwnedHqlExpr self = container->getRelativeSelf();
OwnedHqlExpr absoluteExpr = replaceSelector(choosenValue, querySelfReference(), self);
choosenValue.setown(selector->queryRootRow()->bindToRow(absoluteExpr, querySelfReference()));
}
else
{
if (hasNoMoreRowsThan(value, getIntValue(choosenValue)))
choosenValue.clear();
}
if (choosenValue)
value.setown(createDataset(no_choosen, LINK(value), LINK(choosenValue)));
}
IHqlExpression * maxCount = queryAttributeChild(column, maxCountAtom, 0);
if (maxCount && !hasNoMoreRowsThan(value, getIntValue(maxCount)))
{
//Generate a limit test if there isn't a limit that ensures it is small enough
StringBuffer failText, columnText;
expandSelectPathText(columnText, true).toLowerCase();
failText.appendf("Too many rows assigned to field %s", columnText.str());
OwnedHqlExpr fail = translator.createFailAction(failText.str(), maxCount, NULL, translator.queryCurrentActivityId(ctx));
value.setown(createDataset(no_limit, LINK(value), createComma(LINK(maxCount), LINK(fail))));
}
return value.getClear();
}
IHqlExpression* HqlGram::processAbstractDataset(IHqlExpression* _expr, IHqlExpression* formal, IHqlExpression* actual, IHqlExpression * mapping, const attribute& errpos, bool errorIfNotFound, bool & hadError)
{
LinkedHqlExpr transformed = _expr;
IHqlExpression* formalRecord = formal->queryRecord();
IHqlExpression* actualRecord = actual->queryRecord();
assertex(formalRecord && actualRecord);
hadError = false;
IHqlSimpleScope *actualScope = actualRecord->querySimpleScope();
unsigned numChildren = formalRecord->numChildren();
for (unsigned idx = 0; idx < numChildren; idx++)
{
IHqlExpression* kid = formalRecord->queryChild(idx);
if ((kid->getOperator() == no_ifblock) || kid->isAttribute())
continue;
IIdAtom * name = kid->queryId();
IIdAtom * mapto = fieldMapTo(mapping, name);
OwnedHqlExpr match = actualScope->lookupSymbol(mapto);
if (match)
{
if (!kid->queryType()->assignableFrom(match->queryType()))
{
StringBuffer fromType, toType;
getFriendlyTypeStr(kid,fromType);
getFriendlyTypeStr(match,toType);
reportError(ERR_DSPARAM_TYPEMISMATCH, errpos, "Can not mapping type %s(field '%s') to %s(field '%s')",
fromType.str(), str(kid->queryName()), toType.str(), str(match->queryName()));
hadError = true;
}
//MORE: This should really be mapped in a single go
if (transformed)
transformed.setown(bindField(transformed, kid, match));
}
else if (errorIfNotFound)
{
reportError(ERR_DSPARM_MISSINGFIELD,errpos,"Dataset %s has no field named '%s'", str(actual->queryName()), str(mapto));
hadError = true;
}
}
return transformed.getClear();
}