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// check notablescan mode
//
// @tags: [
// assumes_against_mongod_not_mongos,
// # This test attempts to perform read operations after having enabled the notablescan server
// # parameter. The former operations may be routed to a secondary in the replica set, whereas the
// # latter must be routed to the primary.
// assumes_read_preference_unchanged,
// assumes_superuser_permissions,
// does_not_support_stepdowns,
// # Server parameters are stored in-memory only so are not transferred onto the recipient. This
// # test sets the server parameter "notablescan" to force the node to not execute queries that
// # require a collection scan and return an error.
// tenant_migration_incompatible,
// ]
t = db.test_notablescan;
t.drop();
try {
assert.commandWorked(db._adminCommand({setParameter: 1, notablescan: true}));
// commented lines are SERVER-2222
if (0) { // SERVER-2222
assert.throws(function() {
t.find({a: 1}).toArray();
});
}
t.save({a: 1});
assert.throws(function() {
t.count({a: 1});
});
if (0) {
assert.throws(function() {
t.find({}).toArray();
});
}
assert.eq(1, t.find({}).itcount()); // SERVER-274
let err = assert.throws(function() {
t.find({a: 1}).toArray();
});
assert.includes(err.toString(), "No indexed plans available, and running with 'notablescan'");
err = assert.throws(function() {
t.find({a: 1}).hint({$natural: 1}).toArray();
});
assert.includes(err.toString(), "$natural");
assert.includes(err.toString(), "notablescan");
t.createIndex({a: 1});
assert.eq(0, t.find({a: 1, b: 1}).itcount());
assert.eq(1, t.find({a: 1, b: null}).itcount());
// SERVER-4327
assert.eq(0, t.find({a: {$in: []}}).itcount());
assert.eq(0, t.find({a: {$in: []}, b: 0}).itcount());
} finally {
// We assume notablescan was false before this test started and restore that
// expected value.
assert.commandWorked(db._adminCommand({setParameter: 1, notablescan: false}));
}
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