/**
* Helper function to check if the current equality match paths conflict with a new path.
*/
static Status checkEqualityConflicts(const EqualityMatches& equalities, const FieldRef& path) {
int parentPathPart = -1;
const BSONElement& parentEl = findParentEqualityElement(equalities, path, &parentPathPart);
if (parentEl.eoo())
return Status::OK();
string errMsg = "cannot infer query fields to set, ";
StringData pathStr = path.dottedField();
StringData prefixStr = path.dottedSubstring(0, parentPathPart);
StringData suffixStr = path.dottedSubstring(parentPathPart, path.numParts());
if (suffixStr.size() != 0)
errMsg += stream() << "both paths '" << pathStr << "' and '" << prefixStr
<< "' are matched";
else
errMsg += stream() << "path '" << pathStr << "' is matched twice";
return Status(ErrorCodes::NotSingleValueField, errMsg);
}
static BSONElement findEqualityElement(const EqualityMatches& equalities, const FieldRef& path) {
int parentPathPart;
const BSONElement& parentEl =
pathsupport::findParentEqualityElement(equalities, path, &parentPathPart);
if (parentPathPart == static_cast<int>(path.numParts()))
return parentEl;
if (parentEl.type() != Object)
return BSONElement();
StringData suffixStr = path.dottedSubstring(parentPathPart, path.numParts());
BSONMatchableDocument matchable(parentEl.Obj());
return extractKeyElementFromMatchable(matchable, suffixStr);
}