private static async Task Step11AnalyticAndWindowFunctions(ISqDatabase database)
{
var cUserName = CustomColumnFactory.String("Name");
var cNum = CustomColumnFactory.Int64("Num");
var cFirst = CustomColumnFactory.String("First");
var cLast = CustomColumnFactory.String("Last");
var user = new TableUser();
await Select(
(user.FirstName + " " + user.LastName)
.As(cUserName),
RowNumber()
/*.OverPartitionBy(some fields)*/
.OverOrderBy(user.FirstName)
.As(cNum),
FirstValue(user.FirstName + " " + user.LastName)
/*.OverPartitionBy(some fields)*/
.OverOrderBy(user.FirstName)
.FrameClauseEmpty()
.As(cFirst),
LastValue(user.FirstName + " " + user.LastName)
/*.OverPartitionBy(some fields)*/
.OverOrderBy(user.FirstName)
.FrameClause(
FrameBorder.UnboundedPreceding,
FrameBorder.UnboundedFollowing)
.As(cLast))
.From(user)
.Query(database,
r => Console.WriteLine(
$"Num: {cNum.Read(r)}, Name: {cUserName.Read(r)}, " +
$"First: {cFirst.Read(r)}, Last: {cLast.Read(r)}"));
}
private static async Task Step12Merge(ISqDatabase database)
{
var data = new[]
{
new { FirstName = "Francois", LastName = "Sturman2" },
new { FirstName = "Allina", LastName = "Freeborne2" },
new { FirstName = "Maye", LastName = "Malloy" },
};
var action = CustomColumnFactory.String("Actions");
var inserted = CustomColumnFactory.NullableInt32("Inserted");
var deleted = CustomColumnFactory.NullableInt32("Deleted");
var tableUser = new TableUser();
await MergeDataInto(tableUser, data)
.MapDataKeys(s => s
.Set(s.Target.FirstName, s.Source.FirstName))
.MapData(s => s
.Set(s.Target.LastName, s.Source.LastName))
.WhenMatchedThenUpdate()
.AlsoSet(s => s
.Set(s.Target.Version, s.Target.Version + 1)
.Set(s.Target.ModifiedAt, GetUtcDate()))
.WhenNotMatchedByTargetThenInsert()
.AlsoInsert(s => s
.Set(s.Target.Version, 1)
.Set(s.Target.ModifiedAt, GetUtcDate()))
.Output((t, s, m) => m.Inserted(t.UserId.As(inserted)).Deleted(t.UserId.As(deleted)).Action(action))
.Done()
.Query(database,
r => Console.WriteLine(
$"UserId Inserted: {inserted.Read(r)},UserId Deleted: {deleted.Read(r)} , Action: {action.Read(r)}"));
}
private static async Task Step8JoinTables(ISqDatabase database)
{
var tUser = new TableUser();
var tCompany = new TableCompany();
var tCustomer = new TableCustomer();
var cType = CustomColumnFactory.Int16("Type");
var cName = CustomColumnFactory.String("Name");
var customers = await Select(
tCustomer.CustomerId,
Case()
.When(IsNotNull(tUser.UserId))
.Then(Cast(1, SqlType.Int16))
.When(IsNotNull(tCompany.CompanyId))
.Then(Cast(2, SqlType.Int16))
.Else(Null)
.As(cType),
Case()
.When(IsNotNull(tUser.UserId))
.Then(tUser.FirstName + " " + tUser.LastName)
.When(IsNotNull(tCompany.CompanyId))
.Then(tCompany.CompanyName)
.Else(Null)
.As(cName)
)
.From(tCustomer)
.LeftJoin(tUser, on: tUser.UserId == tCustomer.UserId)
.LeftJoin(tCompany, on: tCompany.CompanyId == tCustomer.CompanyId)
.QueryList(database,
r => (Id: tCustomer.CustomerId.Read(r), CustomerType: cType.Read(r), Name: cName.Read(r)));
foreach (var customer in customers)
{
Console.WriteLine($"Id: {customer.Id}, Name: {customer.Name}, Type: {customer.CustomerType}");
}
}
public void FullTest()
{
const int usersCount = 3;
var data = new List <UserData>(usersCount);
for (int i = 0; i < usersCount; i++)
{
data.Add(new UserData
{
UserId = i % 2 == 0 ? 0 : i,
FirstName = "First" + i,
LastName = "Last" + i,
EMail = $"user{i}@company.com",
RegDate = new DateTime(2020, 01, 02)
});
}
DateTime utcNow = new DateTime(2020, 10, 03, 10, 17, 12, 131);
var recordIndex = CustomColumnFactory.Int32("Index");
var inserted = CustomColumnFactory.Int32("InsertedUserId");
var deleted = CustomColumnFactory.Int32("DeletedUserId");
var action = CustomColumnFactory.String("Action");
var mergeOutput = SqQueryBuilder
.MergeDataInto(Tables.User(), data)
.MapDataKeys(s => s.Set(s.Target.UserId, s.Source.UserId))
.MapData(s => s
.Set(s.Target.FirstName, s.Source.FirstName)
.Set(s.Target.LastName, s.Source.LastName)
.Set(s.Target.Email, s.Source.EMail)
.Set(s.Target.RegDate, s.Source.RegDate))
.MapExtraData(s => s.Set(recordIndex, s.Index))
.AndOn((t, s) => t.UserId.WithSource(s) != 0)
.WhenMatchedThenUpdate()
.AlsoSet(s =>
s.Set(s.Target.Version, s.Target.Version + 1)
.Set(s.Target.Modified, utcNow))
.WhenNotMatchedByTargetThenInsert()
.ExcludeKeys()
.Exclude(t => new[] { t.Email.ColumnName, t.LastName.ColumnName })
.AlsoInsert(s => s
.Set(s.Target.LastName, "Fake")
.Set(s.Target.Created, utcNow)
.Set(s.Target.Modified, utcNow)
.Set(s.Target.Version, 1))
.WhenNotMatchedBySourceThenDelete()
.Output((t, s, m) => m
.Inserted(t.UserId.As(inserted))
.Inserted(t.UserId.As(deleted))
.Column(recordIndex.WithSource(s))
.Action(action))
.Done();
var actual = mergeOutput?.ToSql();
var expected = "MERGE [dbo].[user] [A0] USING (" +
"VALUES (0,'First0','Last0','*****@*****.**','2020-01-02',0)," +
"(1,'First1','Last1','*****@*****.**','2020-01-02',1)," +
"(0,'First2','Last2','*****@*****.**','2020-01-02',2)" +
")[A1]([UserId],[FirstName],[LastName],[Email],[RegDate],[Index]) " +
"ON [A0].[UserId]=[A1].[UserId] AND [A1].[UserId]!=0 " +
"WHEN MATCHED THEN UPDATE SET " +
"[A0].[FirstName]=[A1].[FirstName]," +
"[A0].[LastName]=[A1].[LastName]," +
"[A0].[Email]=[A1].[Email]," +
"[A0].[RegDate]=[A1].[RegDate]," +
"[A0].[Version]=[A0].[Version]+1," +
"[A0].[Modified]='2020-10-03T10:17:12.131' " +
"WHEN NOT MATCHED THEN INSERT" +
"([FirstName],[RegDate],[LastName],[Created],[Modified],[Version]) " +
"VALUES([A1].[FirstName],[A1].[RegDate],'Fake','2020-10-03T10:17:12.131','2020-10-03T10:17:12.131',1) " +
"WHEN NOT MATCHED BY SOURCE THEN DELETE " +
"OUTPUT INSERTED.[UserId] [InsertedUserId],INSERTED.[UserId] [DeletedUserId],[A1].[Index],$ACTION [Action];";
Assert.AreEqual(expected, actual);
}