static void runDeleteFromOplogWithLock(const char* ns, BSONObj op) {
NamespaceDetails* nsd = nsdetails(ns);
BSONObj row = op[KEY_STR_ROW].Obj();
BSONObj pk = row["_id"].wrap("");
uint64_t flags = NamespaceDetails::NO_LOCKTREE;
deleteOneObject(nsd, pk, row, flags);
}
// Special-cased helper for deleting ranges out of an index.
long long deleteIndexRange(const string &ns,
const BSONObj &min,
const BSONObj &max,
const BSONObj &keyPattern,
const bool maxInclusive,
const bool fromMigrate) {
Collection *cl = getCollection(ns);
if (cl == NULL) {
return 0;
}
IndexDetails &i = cl->idx(cl->findIndexByKeyPattern(keyPattern));
// Extend min to get (min, MinKey, MinKey, ....)
KeyPattern kp(keyPattern);
BSONObj newMin = KeyPattern::toKeyFormat(kp.extendRangeBound(min, false));
// If upper bound is included, extend max to get (max, MaxKey, MaxKey, ...)
// If not included, extend max to get (max, MinKey, MinKey, ....)
BSONObj newMax = KeyPattern::toKeyFormat(kp.extendRangeBound(max, maxInclusive));
long long nDeleted = 0;
for (shared_ptr<Cursor> c(Cursor::make(cl, i, newMin, newMax, maxInclusive, 1));
c->ok(); c->advance()) {
const BSONObj pk = c->currPK();
const BSONObj obj = c->current();
OpLogHelpers::logDelete(ns.c_str(), obj, fromMigrate);
deleteOneObject(cl, pk, obj);
nDeleted++;
}
return nDeleted;
}
void removeDataFromDocsMap() {
Client::Transaction txn(DB_SERIALIZABLE);
RollbackDocsMapIterator docsMap;
size_t numDocs = 0;
log() << "Removing documents from collections for rollback." << rsLog;
for (RollbackDocsMapIterator it; it.ok(); it.advance()){
numDocs++;
DocID curr = it.current();
LOCK_REASON(lockReason, "repl: deleting a doc during rollback");
Client::ReadContext ctx(curr.ns, lockReason);
Collection* cl = getCollection(curr.ns);
verify(cl);
BSONObj currDoc;
LOG(2) << "Finding by pk of " << curr.pk << rsLog;
bool found = cl->findByPK(curr.pk, currDoc);
if (found) {
deleteOneObject(cl, curr.pk, currDoc, Collection::NO_LOCKTREE);
}
}
log() << "Done removing " << numDocs << " documents from collections for rollback." << rsLog;
updateRollbackStatus(BSON("_id" << ROLLBACK_ID << "state" << RB_DOCS_REMOVED<< \
"info" << "removed docs from docs map"));
txn.commit(DB_TXN_NOSYNC);
}
long long _deleteObjects(const char *ns, BSONObj pattern, bool justOne, bool logop) {
Collection *cl = getCollection(ns);
if (cl == NULL) {
return 0;
}
uassert(10101, "can't remove from a capped collection", !cl->isCapped());
BSONObj obj;
BSONObj pk = cl->getSimplePKFromQuery(pattern);
// Fast-path for simple primary key deletes.
if (!pk.isEmpty()) {
if (queryByPKHack(cl, pk, pattern, obj)) {
if (logop) {
OpLogHelpers::logDelete(ns, obj, false);
}
deleteOneObject(cl, pk, obj);
return 1;
}
return 0;
}
long long nDeleted = 0;
for (shared_ptr<Cursor> c = getOptimizedCursor(ns, pattern); c->ok(); ) {
pk = c->currPK();
if (c->getsetdup(pk)) {
c->advance();
continue;
}
if (!c->currentMatches()) {
c->advance();
continue;
}
obj = c->current();
// justOne deletes do not intend to advance, so there's
// no reason to do so here and potentially overlock rows.
if (!justOne) {
// There may be interleaved query plans that utilize multiple
// cursors, some of which point to the same PK. We advance
// here while those cursors point the row to be deleted.
//
// Make sure to get local copies of pk/obj before advancing.
pk = pk.getOwned();
obj = obj.getOwned();
while (c->ok() && c->currPK() == pk) {
c->advance();
}
}
if (logop) {
OpLogHelpers::logDelete(ns, obj, false);
}
deleteOneObject(cl, pk, obj);
nDeleted++;
if (justOne) {
break;
}
}
return nDeleted;
}
