public void ItShouldHandleASimpleUnionAll()
{
var stream =
AST.SqlExpression.NewSelect(
AST.SelectExpression.NewPlain(
AST.PlainSelectExpression.NewSet(
S.UnionAll(
S.PlainSelect(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(S.Col <Person>("Age"), AST.BinaryOperation.GreaterThan, S.Const(42)))),
S.PlainSelect(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(S.Col <Person>("Name"), AST.BinaryOperation.Equal, S.Const("'Kalle'"))))
))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
var expected =
"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age > 42 " +
"UNION ALL " +
"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Name = 'Kalle'";
Assert.That(result, Is.EqualTo(expected));
}
private SqlExpression GetExpectedJoinStream(JoinType joinKeyword)
{
return
(S.SelectNode(
S.Select(S.Star <Person>(), S.Star <Car>()),
S.From <Person>(
S.Join <Person, Car>(joinKeyword, S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <Car>("DriverId")))
)));
}
public void ItShouldBeAbleToParameterizeAQuery()
{
var stream =
S.SelectNode(
S.Select(S.Star<Person>()),
S.From<Person>(),
S.Where(S.BinExp(S.Col<Person>("Age"), BinaryOperation.GreaterThan, S.Param("age"))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age > @age"));
}
public void ItShouldBePossibleToSpecifyNullsFirstOrdering()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
orderBy: S.OrderBy(S.OrderClause(S.Col <Person>("Age"), Direction.Ascending, NullsOrdering.NullsFirst)));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("SELECT PersonRef.* FROM Person PersonRef ORDER BY PersonRef.Age ASC NULLS FIRST"));
}
public void ItShouldBePossibleToSqlifyASimpleSelect()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>());
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef"));
}
public void ItShouldBePossibleToOrderDescendingByAColumn()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
orderBy: S.OrderBy(S.OrderClause(S.Col <Person>("Age"), Direction.Descending)));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef ORDER BY PersonRef.Age DESC"));
}
public void ItShouldIncludeTheSchemaInTheGeneratedSql()
{
var stream =
S.SelectNode(
S.Select(S.Star <Employee>()),
S.From <Employee>(),
S.Where(S.BinExp(S.Col <Employee>("Salary"), BinaryOperation.GreaterThan, S.Const(25000))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT EmployeeRef.* FROM HumanResources.Employee EmployeeRef WHERE EmployeeRef.Salary > 25000"));
}
public void ItShouldBePossibleToSqlifyAWhere()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(42))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age > 42"));
}
public void ItCanSupportFlippingOrdersForInvertedComparisonWithNull()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(S.Null(), BinaryOperation.NotEqual, S.Col <Person>("Age"))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age IS NOT NULL"));
}
public void ItShouldBePossibleToSqlifyAWhereWithAndOrsThatIsNotInBinaryExpressions()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(S.Col <Person>("Age"), BinaryOperation.LessThan, S.Const(42)),
S.And(S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(12))),
S.Or(S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Karl'")))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age < 42 AND PersonRef.Age > 12 OR PersonRef.Name = 'Karl'"));
}
public void ItShouldBePossibleToSqlifyAQueryWithAnInSubExpression()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(
S.Col <Person>("Id"),
BinaryOperation.In,
S.SubExp(
S.Select(S.Col <Car>("DriverId")),
S.From <Car>()))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Id IN (SELECT CarRef.DriverId FROM Car CarRef)"));
}
public void ItShouldBePossibleToSqlifyACompareAgainstASubExpressionInAWhereExpression()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(
S.Col <Person>("Age"),
BinaryOperation.GreaterThan,
S.SubExp(
S.Select(S.Col <Car>("Age")),
S.From <Car>(),
S.Where(S.BinExp(S.Col <Car>("Id"), BinaryOperation.Equal, S.Const(42)))))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef WHERE PersonRef.Age > (SELECT CarRef.Age FROM Car CarRef WHERE CarRef.Id = 42)"));
}
public void ItShouldBeAbleToSqlifyMultipleTableJoins()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>(), S.Star <Car>(), S.Star <House>()),
S.From <House>(
S.Join <House, Person>(JoinType.InnerJoin, S.BinExp(S.Col <House>("Id"), BinaryOperation.Equal, S.Col <Person>("LivesAtHouseId"))),
S.Join <Person, Car>(JoinType.LeftJoin, S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <Car>("DriverId")))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
@"SELECT PersonRef.*, CarRef.*, HouseRef.* " +
"FROM House HouseRef " +
"INNER JOIN Person PersonRef ON HouseRef.Id = PersonRef.LivesAtHouseId " +
"LEFT JOIN Car CarRef ON PersonRef.Id = CarRef.DriverId"));
}
public void ItShouldBePossibleToDoARecursiveCommonTableExpression()
{
var stream =
S.SelectNode(
S.With(
S.TableDef <RecursivePerson>(
S.UnionAll(
S.PlainSelect(
S.Select(
S.AliasedCol(S.Const(0), "Level"),
S.Col <Person>("Name"),
S.Col <Person>("ParentId")),
S.From <Person>(),
S.Where(
S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Kalle'")))),
S.PlainSelect(
S.Select(
S.AliasedCol(
S.BinExp(S.Col <RecursivePerson>("Level"), BinaryOperation.Add, S.Const(1)), "Level"),
S.Col <Person>("Name"),
S.Col <Person>("ParentId")),
S.From <Person>(
S.Join <Person, RecursivePerson>(
AST.JoinType.InnerJoin,
S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <RecursivePerson>("ParentId")))))))),
S.PlainSelect(
S.Select(S.Star <RecursivePerson>()),
S.From <RecursivePerson>()));
var result = SqlGen.SqlifyExpression(Dialects.AnsiSql.Dialect, stream);
var expected =
"WITH RecursivePerson AS (" +
"SELECT 0 AS Level, PersonRef.Name, PersonRef.ParentId FROM Person PersonRef WHERE PersonRef.Name = 'Kalle' " +
"UNION ALL " +
"SELECT RecursivePersonRef.Level + 1 AS Level, PersonRef.Name, PersonRef.ParentId " +
"FROM Person PersonRef " +
"INNER JOIN RecursivePerson RecursivePersonRef ON PersonRef.Id = RecursivePersonRef.ParentId" +
") " +
"SELECT RecursivePersonRef.* FROM RecursivePerson RecursivePersonRef";
Assert.That(result, Is.EqualTo(expected));
}
public void ItShouldBePossibleToOrderBySeveralColumns()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>(), S.Star <Car>()),
S.From <Person>(
S.Join <Person, Car>(JoinType.InnerJoin, S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <Car>("DriverId")))),
orderBy:
S.OrderBy(
S.OrderClause(S.Col <Person>("Age"), Direction.Ascending),
S.OrderClause(S.Col <Car>("Brand"), Direction.Descending)));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
@"SELECT PersonRef.*, CarRef.* FROM Person PersonRef " +
"INNER JOIN Car CarRef ON PersonRef.Id = CarRef.DriverId " +
"ORDER BY PersonRef.Age ASC, CarRef.Brand DESC"));
}
public void ItShouldAddParensWhenNecessaryToPreserveAndOrPredecence()
{
var stream =
S.SelectNode(
S.Select(S.Star <Person>()),
S.From <Person>(),
S.Where(
S.BinExp(
S.BinExp(
S.BinExp(S.Col <Person>("Age"), BinaryOperation.LessThan, S.Const(10)),
BinaryOperation.Or,
S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Karl'"))
),
BinaryOperation.And,
S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(42))
)));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo(@"SELECT PersonRef.* FROM Person PersonRef WHERE (PersonRef.Age < 10 OR PersonRef.Name = 'Karl') AND PersonRef.Age > 42"));
}
public void ItShouldBePossibleToInnerJoinATableOnSeveralOtherTables()
{
var expr = Select.Star <Car>()
.From <House>()
.InnerJoin <House, Person>((h, p) => h.Id == p.LivesAtHouseId)
.InnerJoin <House, Person, Car>((h, p, c) => c.Brand == h.Address && p.LivesAtHouseId == h.Id);
var result = expr.ToSqlExpression();
var expected =
S.SelectNode(
S.Select(S.Star <Car>()),
S.From <House>(
S.Join <House, Person, Car>(
JoinType.InnerJoin,
S.BinExp(
S.BinExp(S.Col <Car>("Brand"), BinaryOperation.Equal, S.Col <House>("Address")),
BinaryOperation.And,
S.BinExp(S.Col <Person>("LivesAtHouseId"), BinaryOperation.Equal, S.Col <House>("Id")))),
S.Join <House, Person>(
JoinType.InnerJoin,
S.BinExp(S.Col <House>("Id"), BinaryOperation.Equal, S.Col <Person>("LivesAtHouseId")))));
Assert.That(result, Is.EqualTo(expected));
}
public void ItShouldBePossibleToUseTheParameterInMoreComplexExpressions()
{
var stream =
S.SelectNode(
S.Select(S.Star<Person>()),
S.From<Person>(),
S.Where(
S.BinExp(
S.BinExp(S.Col<Person>("Age"), BinaryOperation.GreaterThan, S.Param("age")),
BinaryOperation.And,
S.BinExp(S.Param("age"), BinaryOperation.LessThan, S.Const(90))
),
S.Or(S.BinExp(S.Col<Person>("Age"), BinaryOperation.LessThan, S.Param("age")))
));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result,
Is.EqualTo(
@"SELECT PersonRef.* " +
"FROM Person PersonRef " +
"WHERE PersonRef.Age > @age "+
"AND @age < 90 " +
"OR PersonRef.Age < @age"));
}