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/**
* Test that change streams returns DDL operation on views.
*
* @tags: [ requires_fcv_60, ]
*/
(function() {
"use strict";
load('jstests/libs/change_stream_util.js');
load('jstests/libs/collection_drop_recreate.js');
const testDB = db.getSiblingDB(jsTestName());
// Drop all the namespaces accessed in the test.
assertDropCollection(testDB, "base");
assertDropCollection(testDB, "view");
assertDropCollection(testDB, "viewOnView");
// Insert some data on the base collection so that the passthrough suites would finishing setting up
// the collections, and does not generate unexpected operations during the test.
assert.commandWorked(testDB.createCollection("base"));
assert.commandWorked(testDB["base"].insert({_id: 1}));
const dbName = testDB.getName();
const viewPipeline = [{$match: {a: 2}}, {$project: {a: 1}}];
(function runViewEventAndResumeTest() {
let cursor = testDB.aggregate([{$changeStream: {showExpandedEvents: true}}]);
assert.commandWorked(testDB.createView("view", "base", viewPipeline));
assert.soon(() => cursor.hasNext());
let event = cursor.next();
assert(event.clusterTime, event);
assert(event.wallTime, event);
assertChangeStreamEventEq(event, {
operationType: "create",
ns: {db: dbName, coll: "view"},
operationDescription: {viewOn: "base", pipeline: viewPipeline}
});
// Ensure that we can resume the change stream using a resuming token from the create view
// event.
cursor =
testDB.aggregate([{$changeStream: {resumeAfter: event._id, showExpandedEvents: true}}]);
assert.commandWorked(testDB.createView("viewOnView", "view", viewPipeline));
assert.soon(() => cursor.hasNext());
const events = [];
const createEvent = cursor.next();
events.push(createEvent);
assertChangeStreamEventEq(createEvent, {
operationType: "create",
ns: {db: dbName, coll: "viewOnView"},
operationDescription: {viewOn: "view", pipeline: viewPipeline}
});
// Test 'collMod' command on views.
const updatedViewPipeline = [{$match: {a: 1}}, {$project: {a: 1}}];
assert.commandWorked(
testDB.runCommand({collMod: "viewOnView", viewOn: "view", pipeline: updatedViewPipeline}));
assert.soon(() => cursor.hasNext());
const modifyEvent = cursor.next();
events.push(modifyEvent);
assertChangeStreamEventEq(modifyEvent, {
operationType: "modify",
ns: {db: dbName, coll: "viewOnView"},
operationDescription: {viewOn: "view", pipeline: updatedViewPipeline}
});
// Test 'drop' events.
assertDropCollection(testDB, "view");
assert.soon(() => cursor.hasNext());
const dropEvent = cursor.next();
events.push(dropEvent);
assertChangeStreamEventEq(dropEvent, {operationType: "drop", ns: {db: dbName, coll: "view"}});
assertDropCollection(testDB, "viewOnView");
assert.soon(() => cursor.hasNext());
const dropEventView = cursor.next();
events.push(dropEventView);
assertChangeStreamEventEq(dropEventView,
{operationType: "drop", ns: {db: dbName, coll: "viewOnView"}});
// Test view change stream events on a timeseries collection.
assert.commandWorked(
testDB.createCollection("timeseries_coll", {timeseries: {timeField: "time"}}));
assert.soon(() => cursor.hasNext());
const createTimeseriesEvent = cursor.next();
events.push(createTimeseriesEvent);
assertChangeStreamEventEq(createTimeseriesEvent, {
operationType: "create",
ns: {db: dbName, coll: "timeseries_coll"},
operationDescription: {
viewOn: "system.buckets.timeseries_coll",
pipeline: [{$_internalUnpackBucket: {timeField: "time", bucketMaxSpanSeconds: 3600}}]
}
});
assert.commandWorked(
testDB.runCommand({collMod: "timeseries_coll", timeseries: {granularity: 'minutes'}}));
assert.soon(() => cursor.hasNext());
const modifyTimeseriesEvent = cursor.next();
events.push(modifyTimeseriesEvent);
assertChangeStreamEventEq(modifyTimeseriesEvent, {
operationType: "modify",
ns: {db: dbName, coll: "timeseries_coll"},
operationDescription: {
viewOn: "system.buckets.timeseries_coll",
pipeline: [{$_internalUnpackBucket: {timeField: "time", bucketMaxSpanSeconds: 86400}}]
}
});
assertDropCollection(testDB, "timeseries_coll");
assert.soon(() => cursor.hasNext());
const dropTimeseriesEvent = cursor.next();
events.push(dropTimeseriesEvent);
assertChangeStreamEventEq(dropTimeseriesEvent, {
operationType: "drop",
ns: {db: dbName, coll: "timeseries_coll"},
});
// Generate a dummy event so that we can test all events for resumability.
assert.commandWorked(testDB.createView("dummyView", "view", viewPipeline));
assert.soon(() => cursor.hasNext());
const dummyEvent = cursor.next();
events.push(dummyEvent);
assertDropCollection(testDB, "dummyView");
assert.soon(() => cursor.hasNext());
// Test that for all the commands we can resume the change stream using a resume token.
for (let idx = 0; idx < events.length - 1; idx++) {
const event = events[idx];
const subsequent = events[idx + 1];
const newCursor =
testDB.aggregate([{$changeStream: {resumeAfter: event._id, showExpandedEvents: true}}]);
assert.soon(() => newCursor.hasNext());
assertChangeStreamEventEq(newCursor.next(), subsequent);
}
})();
const cst = new ChangeStreamTest(testDB);
// Cannot start a change stream on a view namespace.
assert.commandWorked(testDB.createView("view", "base", viewPipeline));
assert.commandFailedWithCode(
assert.throws(() => cst.startWatchingChanges({
pipeline: [{$changeStream: {showExpandedEvents: true}}],
collection: "view",
doNotModifyInPassthroughs: true
})),
ErrorCodes.CommandNotSupportedOnView);
// Creating a collection level change stream before creating a view with the same name, does not
// produce any view related events.
assertDropCollection(testDB, "view");
let cursor = cst.startWatchingChanges({
pipeline: [{$changeStream: {showExpandedEvents: true}}],
collection: "view",
doNotModifyInPassthroughs: true
});
// Create a view, then drop it and create a normal collection with the same name.
assert.commandWorked(testDB.createView("view", "base", viewPipeline));
assertDropCollection(testDB, "view");
assert.commandWorked(testDB.createCollection("view"));
// Confirm that the stream only sees the normal collection creation, not the view events.
let event = cst.getNextChanges(cursor, 1)[0];
assert(event.collectionUUID, event);
assertChangeStreamEventEq(event, {
operationType: "create",
ns: {db: dbName, coll: "view"},
operationDescription: {idIndex: {v: 2, key: {_id: 1}, name: "_id_"}}
});
// Change stream on a single collection does not produce view events.
assertDropCollection(testDB, "view");
cursor = cst.startWatchingChanges({
pipeline: [{$changeStream: {showExpandedEvents: true}}],
collection: "base",
doNotModifyInPassthroughs: true
});
// Verify that the view related operations are ignored, and only the event for insert on the base
// collection is returned.
assert.commandWorked(testDB.createView("view", "base", viewPipeline));
assertDropCollection(testDB, "view");
assert.commandWorked(testDB["base"].insert({_id: 0}));
event = cst.getNextChanges(cursor, 1)[0];
assert(event.collectionUUID, event);
assertChangeStreamEventEq(event, {
operationType: "insert",
ns: {db: dbName, coll: "base"},
fullDocument: {_id: 0},
documentKey: {_id: 0}
});
}());
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