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fix for mixed && and || queries

This commit is contained in:
Ari Lazier 2015-11-24 11:18:03 -08:00
parent 812930285e
commit 2324f8cc9b
1 changed files with 24 additions and 10 deletions
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34
src/object-store/parser/parser.cpp
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@ -107,27 +107,37 @@ struct pred : seq< and_pred, star< or_ext > > {};
struct ParserState
{
std::vector<Predicate *> predicate_stack;
Predicate &current() {
Predicate &current()
{
return *predicate_stack.back();
}
bool current_is_compound()
{
return current().type == Predicate::Type::And || current().type == Predicate::Type::Or;
}
bool negate_next = false;
void addExpression(Expression && exp)
{
if (current().type == Predicate::Type::Comparison) {
current().cmpr.expr[1] = std::move(exp);
Predicate &cur = current();
if (cur.type == Predicate::Type::Comparison) {
cur.cmpr.expr[1] = std::move(exp);
predicate_stack.pop_back();
}
else {
assert(current_is_compound());
Predicate p(Predicate::Type::Comparison);
p.cmpr.expr[0] = std::move(exp);
if (negate_next) {
p.negate = true;
negate_next = false;
}
current().cpnd.sub_predicates.emplace_back(std::move(p));
predicate_stack.push_back(&current().cpnd.sub_predicates.back());
cur.cpnd.sub_predicates.emplace_back(std::move(p));
predicate_stack.push_back(&cur.cpnd.sub_predicates.back());
}
}
};
@ -147,6 +157,7 @@ template<> struct action< and_ext >
static void apply( const input & in, ParserState & state )
{
DEBUG_PRINT_TOKEN("<and>");
assert(state.current_is_compound());
// if we were put into an OR group we need to rearrange
auto &current = state.current();
@ -177,6 +188,7 @@ template<> struct action< or_ext >
static void apply( const input & in, ParserState & state )
{
DEBUG_PRINT_TOKEN("<or>");
assert(state.current_is_compound());
// if already an OR group do nothing
auto &current = state.current();
@ -186,15 +198,17 @@ template<> struct action< or_ext >
// if only two predicates in the group, then convert to OR
auto &sub_preds = state.current().cpnd.sub_predicates;
if (sub_preds.size()) {
assert(sub_preds.size() > 1);
if (sub_preds.size() == 2) {
current.type = Predicate::Type::Or;
return;
}
// split the current group into to groups which are ORed together
Predicate pred1(Predicate::Type::And), pred2(Predicate::Type::And);
pred1.cpnd.sub_predicates.insert(sub_preds.begin(), sub_preds.back());
pred2.cpnd.sub_predicates.push_back(std::move(sub_preds.back()));
std::vector<Predicate>::iterator second_last = sub_preds.end() - 2;
pred1.cpnd.sub_predicates.insert(pred1.cpnd.sub_predicates.begin(), sub_preds.begin(), second_last);
pred2.cpnd.sub_predicates.insert(pred2.cpnd.sub_predicates.begin(), second_last, sub_preds.end());
current.type = Predicate::Type::Or;
sub_preds.clear();