public void Delete_Query()
{
using (var file = new TempFile())
{
var initial = new DateTime(2000, 01, 01);
using (var db = new LiteEngine(file.Filename))
{
for (var i = 0; i < 5000; i++)
{
db.Insert("col", new BsonDocument {
{ "dt", initial.AddDays(i) }
});
}
db.EnsureIndex("col", "dt");
Assert.AreEqual(5000, db.Count("col"));
Assert.AreEqual(0, db.Count("col", Query.GT("dd", initial)));
var del = db.Delete("col", Query.GT("dd", initial));
Assert.AreEqual(0, del);
Assert.AreEqual(0, db.Count("col", Query.GT("dd", initial)));
}
}
}
public void Execute(LiteEngine engine, StringScanner s, Display display, InputCommand input, Env env)
{
var col = this.ReadCollection(engine, s);
var query = this.ReadQuery(s);
display.WriteResult(engine.Delete(col, query));
}
public void Simple_Performance_Runner()
{
// just a simple example to test performance speed
using (var file = new TempFile())
using (var db = new LiteEngine(file.Filename))
{
var ti = new Stopwatch();
var tx = new Stopwatch();
var tu = new Stopwatch();
var td = new Stopwatch();
ti.Start();
db.Insert("col", GetDocs(N1));
ti.Stop();
tx.Start();
db.EnsureIndex("col", "name");
tx.Stop();
tu.Start();
db.Update("col", GetDocs(N1));
tu.Stop();
db.EnsureIndex("col", "name");
td.Start();
db.Delete("col", Query.All());
td.Stop();
Debug.WriteLine("Insert time: " + ti.ElapsedMilliseconds);
Debug.WriteLine("EnsureIndex time: " + tx.ElapsedMilliseconds);
Debug.WriteLine("Update time: " + tu.ElapsedMilliseconds);
Debug.WriteLine("Delete time: " + td.ElapsedMilliseconds);
}
}
public IEnumerable <BsonValue> Execute(StringScanner s, LiteEngine engine)
{
var col = this.ReadCollection(engine, s);
var query = this.ReadQuery(s, true);
s.ThrowIfNotFinish();
yield return(engine.Delete(col, query));
}
public void Checkpoint_TransactionRecovery_Test()
{
using (var file = new TempFile())
{
using (var db = new LiteEngine(new FileDiskService(file.Filename), autocommit: false))
{
var log = new StringBuilder();
db.Log.Level = Logger.CACHE;
db.Log.Logging += (s) => log.AppendLine(s);
// initialize my "col" with 1000 docs without transaction
db.Insert("col", GetDocs(1, 1000));
// commit now for intialize new transaction
db.Commit();
// insert a lot of docs inside a single collection (will do checkpoint in disk)
db.Insert("col", GetDocs(1001, N));
// update all documents
db.Update("col", GetDocs(1, N));
// create new index
db.EnsureIndex("col", "type");
// checks if cache had a checkpoint
Assert.IsTrue(log.ToString().Contains("checkpoint"));
// datafile must be big (because checkpoint expand file)
Assert.IsTrue(file.Size > 30 * 1024 * 1024); // in MB\
// delete all docs > 1000
db.Delete("col", Query.GT("_id", 1000));
db.DropIndex("col", "type");
// let's rollback everything
db.Rollback();
// be sure cache are empty
Assert.AreEqual(0, db.CacheUsed);
// datafile must returns to original size (less than 1.5MB for 1000 docs)
Assert.IsTrue(file.Size < 1.5 * 1024 * 1024); // in MB
// test in my only doc exits
Assert.AreEqual(1000, db.Count("col", Query.All()));
Assert.AreEqual(1000, db.Count("col", null));
// test indexes (must have only _id index)
Assert.AreEqual(1, db.GetIndexes("col").Count());
}
}
}
public void Engine_Delete_Test()
{
using (var file = new TempFile())
using (var db = new LiteEngine(file.Filename))
{
var doc1 = new BsonDocument { { "_id", 1 }, { "name", "John" } };
var doc2 = new BsonDocument { { "_id", 2 }, { "name", "Doe" } };
db.Insert("col", doc1);
db.Insert("col", doc2);
db.Delete("col", Query.GTE("_id", 1));
db.Insert("col", doc1);
}
}
public void Process_Insert_Delete()
{
using (var file = new TempFile())
{
using (var dbA = new LiteEngine(file.Filename))
using (var dbB = new LiteEngine(file.Filename))
{
dbA.EnsureIndex("col", "process", false);
// insert 1000 x instance=1
var ta = Task.Factory.StartNew(() =>
{
for (var i = 0; i < 1000; i++)
{
dbA.Insert("col", new BsonDocument {
{ "process", 1 }
});
}
});
// keeping delete all
var tb = Task.Factory.StartNew(() =>
{
// while before starts insert
while (dbB.Count("col", Query.EQ("process", 1)) == 0)
{
Task.Delay(50).Wait();
}
// while until has docs
while (dbB.Count("col", Query.EQ("process", 1)) > 0)
{
dbB.Delete("col", Query.All());
Task.Delay(50).Wait();
}
});
Task.WaitAll(ta, tb);
Assert.AreEqual(0, dbA.Count("col", Query.EQ("process", 1)));
Assert.AreEqual(0, dbB.Count("col", Query.EQ("process", 1)));
}
}
}
public void Engine_Delete_Test()
{
using (var file = new TempFile())
using (var db = new LiteEngine(file.Filename))
{
var doc1 = new BsonDocument {
{ "_id", 1 }, { "name", "John" }
};
var doc2 = new BsonDocument {
{ "_id", 2 }, { "name", "Doe" }
};
db.Insert("col", doc1);
db.Insert("col", doc2);
db.Delete("col", Query.GTE("_id", 1));
db.Insert("col", doc1);
}
}
public void Performance_Test()
{
// just a simple example to test performance speed
using (var file = new TempFile())
using (var db = new LiteEngine(file.Filename))
{
var ti = new Stopwatch();
var tx = new Stopwatch();
var tu = new Stopwatch();
var td = new Stopwatch();
ti.Start();
db.Insert("col", GetDocs(N1));
db.Commit();
ti.Stop();
tx.Start();
db.EnsureIndex("col", "name");
db.Commit();
tx.Stop();
tu.Start();
db.Update("col", GetDocs(N1));
db.Commit();
tu.Stop();
db.EnsureIndex("col", "name");
db.Commit();
td.Start();
db.Delete("col", Query.All());
db.Commit();
td.Stop();
Debug.Print("Insert time: " + ti.ElapsedMilliseconds);
Debug.Print("EnsureIndex time: " + tx.ElapsedMilliseconds);
Debug.Print("Update time: " + tu.ElapsedMilliseconds);
Debug.Print("Delete time: " + td.ElapsedMilliseconds);
}
}
public void Delete()
{
_db.Delete("col", LiteDB.Query.All());
}
public void AutoId_No_Duplicate_After_Delete()
{
// using strong type
using (var db = new LiteDatabase(new MemoryStream()))
{
var col = db.GetCollection <EntityInt>("col1");
var one = new EntityInt {
Name = "One"
};
var two = new EntityInt {
Name = "Two"
};
var three = new EntityInt {
Name = "Three"
};
var four = new EntityInt {
Name = "Four"
};
// insert
col.Insert(one);
col.Insert(two);
Assert.AreEqual(1, one.Id);
Assert.AreEqual(2, two.Id);
// now delete first 2 rows
col.Delete(one.Id);
col.Delete(two.Id);
// and insert new documents
col.Insert(new EntityInt[] { three, four });
Assert.AreEqual(3, three.Id);
Assert.AreEqual(4, four.Id);
}
// using bsondocument/engine
using (var db = new LiteEngine(new MemoryStream()))
{
var one = new BsonDocument {
["Name"] = "One"
};
var two = new BsonDocument {
["Name"] = "Two"
};
var three = new BsonDocument {
["Name"] = "Three"
};
var four = new BsonDocument {
["Name"] = "Four"
};
db.Insert("col", one, BsonType.Int32);
db.Insert("col", two, BsonType.Int32);
Assert.AreEqual(1, one["_id"].AsInt32);
Assert.AreEqual(2, two["_id"].AsInt32);
// now delete first 2 rows
db.Delete("col", one["_id"].AsInt32);
db.Delete("col", two["_id"].AsInt32);
// and insert new documents
db.Insert("col", new BsonDocument[] { three, four }, BsonType.Int32);
Assert.AreEqual(3, three["_id"].AsInt32);
Assert.AreEqual(4, four["_id"].AsInt32);
}
}
public void ShrinkTest_Test()
{
// do some tests
Action <LiteEngine> DoTest = (db) =>
{
Assert.AreEqual(1, db.Count("col", null));
Assert.AreEqual(99, db.UserVersion);
Assert.IsNotNull(db.GetIndexes("col").FirstOrDefault(x => x.Field == "name"));
Assert.IsTrue(db.GetIndexes("col").FirstOrDefault(x => x.Field == "name").Unique);
};
using (var file = new TempFile())
{
using (var db = new LiteEngine(file.Filename))
{
db.UserVersion = 99;
db.EnsureIndex("col", "name", true);
db.Insert("col", GetDocs(1, 40000));
db.Delete("col", Query.GT("_id", 1)); // delete 29.999 docs
Assert.AreEqual(1, db.Count("col", null));
// file still large than 20mb (even with only 1 document)
Assert.IsTrue(file.Size > 20 * 1024 * 1024);
// reduce datafile
db.Shrink();
// now file are small than 50kb
Assert.IsTrue(file.Size < 50 * 1024);
DoTest(db);
}
// re-open datafile to check if is ok
using (var db = new LiteEngine(file.Filename))
{
// still 1 doc and 1 name unique index
DoTest(db);
// shrink again but now with password
var reduced = db.Shrink("abc123");
// file still same size (but now are encrypted)
Assert.AreEqual(0, reduced);
// still 1 doc and 1 name unique index
DoTest(db);
}
// re-open, again, but now with password
using (var db = new LiteEngine(file.Filename, "abc123"))
{
DoTest(db);
// now, remove password
db.Shrink();
// test again
DoTest(db);
}
}
}
public void ShrinkTest_Test()
{
// do some tests
Action<LiteEngine> DoTest = (db) =>
{
Assert.AreEqual(1, db.Count("col", null));
Assert.AreEqual(99, db.UserVersion);
Assert.IsNotNull(db.GetIndexes("col").FirstOrDefault(x => x.Field == "name"));
Assert.IsTrue(db.GetIndexes("col").FirstOrDefault(x => x.Field == "name").Unique);
};
using (var file = new TempFile())
{
using (var db = new LiteEngine(file.Filename))
{
db.UserVersion = 99;
db.EnsureIndex("col", "name", true);
db.Insert("col", GetDocs(1, 30000));
db.Delete("col", Query.GT("_id", 1)); // delete 29.999 docs
Assert.AreEqual(1, db.Count("col", null));
// file still large than 20mb (even with only 1 document)
Assert.IsTrue(file.Size > 20 * 1024 * 1024);
// reduce datafile
db.Shrink();
// now file are small than 50kb
Assert.IsTrue(file.Size < 50 * 1024);
DoTest(db);
}
// re-open datafile to check if is ok
using (var db = new LiteEngine(file.Filename))
{
// still 1 doc and 1 name unique index
DoTest(db);
// shrink again but now with password
var reduced = db.Shrink("abc123");
// file still same size (but now are encrypted)
Assert.AreEqual(0, reduced);
// still 1 doc and 1 name unique index
DoTest(db);
}
// re-open, again, but now with password
using (var db = new LiteEngine(file.Filename, "abc123"))
{
DoTest(db);
// now, remove password
db.Shrink();
// test again
DoTest(db);
}
}
}
public void Checkpoint_TransactionRecovery_Test()
{
using (var file = new TempFile())
{
using (var db = new LiteEngine(new FileDiskService(file.Filename), autocommit: false ))
{
var log = new StringBuilder();
db.Log.Level = Logger.CACHE;
db.Log.Logging += (s) => log.AppendLine(s);
// initialize my "col" with 1000 docs without transaction
db.Insert("col", GetDocs(1, 1000));
// commit now for intialize new transaction
db.Commit();
// insert a lot of docs inside a single collection (will do checkpoint in disk)
db.Insert("col", GetDocs(1001, N));
// update all documents
db.Update("col", GetDocs(1, N));
// create new index
db.EnsureIndex("col", "type");
// checks if cache had a checkpoint
Assert.IsTrue(log.ToString().Contains("checkpoint"));
// datafile must be big (because checkpoint expand file)
Assert.IsTrue(file.Size > 30 * 1024 * 1024); // in MB\
// delete all docs > 1000
db.Delete("col", Query.GT("_id", 1000));
db.DropIndex("col", "type");
// let's rollback everything
db.Rollback();
// be sure cache are empty
Assert.AreEqual(0, db.CacheUsed);
// datafile must returns to original size (less than 1.5MB for 1000 docs)
Assert.IsTrue(file.Size < 1.5 * 1024 * 1024); // in MB
// test in my only doc exits
Assert.AreEqual(1000, db.Count("col", Query.All()));
Assert.AreEqual(1000, db.Count("col", null));
// test indexes (must have only _id index)
Assert.AreEqual(1, db.GetIndexes("col").Count());
}
}
}
public void FreeSlot_Delete()
{
using (var e = new LiteEngine())
{
e.BeginTrans();
// get transaction/snapshot "col1"
var t = e.GetMonitor().GetTransaction(false, out var isNew);
var s = t.CreateSnapshot(LockMode.Write, "col1", true);
// first page
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 1, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 2, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 3, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
// second page
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 4, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 5, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
e.Insert("col1", new BsonDocument[] { new BsonDocument {
["_id"] = 6, ["n"] = new byte[2000]
} }, BsonAutoId.Int32);
// get pages
var colPage = s.CollectionPage;
var indexPage = s.LocalPages.FirstOrDefault(x => x.PageType == PageType.Index);
var dataPage1 = s.LocalPages.FirstOrDefault(x => x.PageType == PageType.Data);
var dataPage2 = s.LocalPages.FirstOrDefault(x => x.PageType == PageType.Data && x.PageID != dataPage1.PageID);
// test dataPage free space
dataPage1.FreeBytes.Should().Be(2064);
dataPage2.FreeBytes.Should().Be(2064);
colPage.FreeDataPageList.Should().Equal(uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue, dataPage2.PageID);
// delete some data
e.Delete("col1", new BsonValue[] { 2 });
// test again dataPage
dataPage1.FreeBytes.Should().Be(4092);
colPage.FreeDataPageList.Should().Equal(uint.MaxValue, uint.MaxValue, uint.MaxValue, dataPage1.PageID, dataPage2.PageID);
// clear first page
e.Delete("col1", new BsonValue[] { 1, 3 });
// page1 must be now a clean page
var emptyPage = s.LocalPages.FirstOrDefault(x => x.PageID == dataPage1.PageID);
emptyPage.PageType.Should().Be(PageType.Empty);
emptyPage.ItemsCount.Should().Be(0);
emptyPage.FreeBytes.Should().Be(8160);
t.Pages.DeletedPages.Should().Be(1);
t.Pages.FirstDeletedPageID.Should().Be(emptyPage.PageID);
t.Pages.LastDeletedPageID.Should().Be(emptyPage.PageID);
}
}
public void AutoId_No_Duplicate_After_Delete()
{
// using strong type
using (var db = new LiteDatabase(new MemoryStream()))
{
var col = db.GetCollection <EntityInt>("col1");
col.EnsureIndex(x => x.Name);
col.Insert(new EntityInt {
Name = "One"
});
col.Insert(new EntityInt {
Name = "Two"
});
var one = col.FindOne(x => x.Name == "One");
var two = col.FindOne(x => x.Name == "Two");
Assert.AreEqual(1, one.Id);
Assert.AreEqual(2, two.Id);
// now delete first 2 rows
col.Delete(one.Id);
col.Delete(two.Id);
// and insert new documents
col.Insert(new EntityInt {
Name = "Three"
});
col.Insert(new EntityInt {
Name = "Four"
});
var three = col.FindOne(x => x.Name == "Three");
var four = col.FindOne(x => x.Name == "Four");
Assert.AreEqual(3, three.Id);
Assert.AreEqual(4, four.Id);
}
// using bsondocument/engine
using (var db = new LiteEngine(new MemoryStream()))
{
db.EnsureIndex("col", "Name");
db.Insert("col", new BsonDocument {
["Name"] = "One"
}, BsonType.Int32);
db.Insert("col", new BsonDocument {
["Name"] = "Two"
}, BsonType.Int32);
var one = db.FindOne("col", Query.EQ("Name", "One"));
var two = db.FindOne("col", Query.EQ("Name", "Two"));
Assert.AreEqual(1, one["_id"].AsInt32);
Assert.AreEqual(2, two["_id"].AsInt32);
// now delete first 2 rows
db.Delete("col", one["_id"].AsInt32);
db.Delete("col", two["_id"].AsInt32);
// and insert new documents
db.Insert("col", new BsonDocument {
["Name"] = "Three"
}, BsonType.Int32);
db.Insert("col", new BsonDocument {
["Name"] = "Four"
}, BsonType.Int32);
var three = db.FindOne("col", Query.EQ("Name", "Three"));
var four = db.FindOne("col", Query.EQ("Name", "Four"));
Assert.AreEqual(3, three["_id"].AsInt32);
Assert.AreEqual(4, four["_id"].AsInt32);
}
}
public void Execute(LiteEngine engine, StringScanner s, Display display, InputCommand input, Env env)
{
var col = this.ReadCollection(engine, s);
var query = this.ReadQuery(s);
display.WriteResult(engine.Delete(col, query));
}
