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// Cannot implicitly shard accessed collections because of following errmsg: A single
// update/delete on a sharded collection must contain an exact match on _id or contain the shard
// key.
// @tags: [assumes_unsharded_collection]
let t = db.pull_or;
t.drop();
let doc = {_id: 1, a: {b: [{x: 1}, {y: 'y'}, {x: 2}, {z: 'z'}]}};
t.insert(doc);
t.update({}, {$pull: {'a.b': {'y': {$exists: true}}}});
assert.eq([{x: 1}, {x: 2}, {z: 'z'}], t.findOne().a.b);
t.drop();
t.insert(doc);
t.update({}, {$pull: {'a.b': {$or: [{'y': {$exists: true}}, {'z': {$exists: true}}]}}});
assert.eq([{x: 1}, {x: 2}], t.findOne().a.b);
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