public void ItShouldBePossibleToInnerJoinATableOnItselfSeveralTimes()
{
var child = Table <Person> .WithReferenceName("child");
var parent = Table <Person> .WithReferenceName("parent");
var grandparent = Table <Person> .WithReferenceName("grandparent");
var expr = Select.Column(grandparent, gp => new { gp.Name, gp.Age })
.From(child)
.InnerJoin(child, parent, (c, p) => c.ParentId == p.Id)
.InnerJoin(child, parent, grandparent, (c, p, gp) => p.ParentId == gp.Id && c.LivesAtHouseId == gp.LivesAtHouseId);
var result = expr.ToSqlExpression();
var expected =
S.SelectNode(
S.Select(
S.Col(grandparent, "Name"),
S.Col(grandparent, "Age")),
S.From(
child,
S.Join(
child,
parent,
grandparent,
JoinType.InnerJoin,
S.BinExp(
S.BinExp(S.Col(parent, "ParentId"), BinaryOperation.Equal, S.Col(grandparent, "Id")),
BinaryOperation.And,
S.BinExp(S.Col(child, "LivesAtHouseId"), BinaryOperation.Equal, S.Col(grandparent, "LivesAtHouseId")))),
S.Join(child, parent, JoinType.InnerJoin, S.BinExp(S.Col(child, "ParentId"), BinaryOperation.Equal, S.Col(parent, "Id")))));
Assert.That(result, Is.EqualTo(expected));
}
public void ItShouldBePossibleToUseMultipleHavingExpressions()
{
var stream =
S.SelectNode(
S.Select(
S.Col <Person>("Name"),
S.Aggregate(AggregateType.Avg, S.Col <Person>("Age")),
S.Col <Car>("Brand"),
S.Aggregate(AggregateType.Min, S.Col <Car>("Age"))),
S.From <Person>(
S.Join <Person, Car>(JoinType.InnerJoin, S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <Car>("DriverId")))),
groupBy:
S.GroupBy(
new[] { S.Col <Person>("Name"), S.Col <Car>("Brand"), },
S.And(S.BinExp(S.Aggregate(AggregateType.Avg, S.Col <Person>("Age")), BinaryOperation.GreaterThan, S.Const(42))),
S.And(S.BinExp(S.Aggregate(AggregateType.Min, S.Col <Car>("Age")), BinaryOperation.GreaterThan, S.Const(2)))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
"SELECT PersonRef.Name, AVG(PersonRef.Age), CarRef.Brand, MIN(CarRef.Age) " +
"FROM Person PersonRef " +
"INNER JOIN Car CarRef ON PersonRef.Id = CarRef.DriverId " +
"GROUP BY PersonRef.Name, CarRef.Brand " +
"HAVING AVG(PersonRef.Age) > 42 " +
"AND MIN(CarRef.Age) > 2"));
}
public void ItShouldBePossibleToSelectFromACommonTableExpression()
{
var expr =
S.SelectNode(
S.With(
S.TableDef <PersonLite>(
S.Select(S.Col <Person>("Name"), S.Col <Person>("Age")),
S.From <Person>(),
S.Where(S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(15))))),
S.Select(S.Col <PersonLite>("Name")),
S.From(new TableIdentifier <PersonLite>()),
S.Where(S.BinExp(S.Col <PersonLite>("Age"), BinaryOperation.Equal, S.Const(42)))
);
var result = SqlGen.SqlifyExpression(Dialects.AnsiSql.Dialect, expr);
var expected =
"WITH PersonLite AS (" +
"SELECT PersonRef.Name, PersonRef.Age " +
"FROM Person PersonRef " +
"WHERE PersonRef.Age > 15" +
") " +
"SELECT PersonLiteRef.Name " +
"FROM PersonLite PersonLiteRef " +
"WHERE PersonLiteRef.Age = 42";
Assert.That(result, Is.EqualTo(expected));
}
public void ItShouldBePossibleToDeleteWithASubQuery()
{
var stream =
S.DeleteNode(
S.From <Car>(),
S.Where(
S.BinExp(
S.Col <Car>("DriverId"),
BinaryOperation.In,
S.SubExp(
S.Select(S.Col <Person>("Id")),
S.From <Person>(),
S.Where(S.BinExp(S.Col <Person>("Age"), BinaryOperation.LessThan, S.Const(18)))))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
"DELETE FROM Car CarRef " +
"WHERE CarRef.DriverId IN (" +
"SELECT PersonRef.Id " +
"FROM Person PersonRef " +
"WHERE PersonRef.Age < 18" +
")"));
}
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 ItShouldBePossibleToPutAWhereExpressionOnADeleteStatement()
{
var stream =
S.DeleteNode(
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(@"DELETE FROM Person PersonRef WHERE PersonRef.Age > 42"));
}
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 ItShouldBePossibleToUpdateInPlace()
{
var stream =
S.UpdateNode(
S.UpdHead <Person>(
S.Ust <Person>("Age", S.BinExp(S.Col <Person>("Age"), BinaryOperation.Add, S.Const(1)))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("UPDATE Person SET Age = Age + 1"));
}
public void ItShouldBePossibleToPerformAConditionalUpdate()
{
var stream =
S.UpdateNode(
S.UpdHead <Person>(S.Ust <Person>("Age", 42)),
S.Where(S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Kalle'"))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("UPDATE Person SET Age = 42 WHERE Name = 'Kalle'"));
}
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 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 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 ItShouldBePossibleToSelectFromSeveralCommonTableExpressions()
{
var oldies = Table <PersonLite> .WithTableAlias("Oldies");
var younglings = Table <PersonLite> .WithTableAlias("YoungOnes");
var expr =
S.SelectNode(
S.With(
S.TableDef(
younglings,
S.Select(S.Col <Person>("Name"), S.Col <Person>("Age")),
S.From <Person>(),
S.Where(S.BinExp(S.Col <Person>("Age"), BinaryOperation.LessThanOrEqual, S.Const(15)))),
S.TableDef(
oldies,
S.Select(S.Col <Person>("Name"), S.Col <Person>("Age")),
S.From <Person>(),
S.Where(S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(40))))
),
S.Select(S.Col(oldies, "Name"), S.Col(younglings, "Name")),
S.From(
oldies,
S.Join(
oldies,
younglings,
Domain.AST.JoinType.InnerJoin,
S.BinExp(
S.BinExp(S.Col(oldies, "Age"), BinaryOperation.Subtract, S.Const(30)),
BinaryOperation.Equal,
S.Col(younglings, "Age"))))
);
var result = SqlGen.SqlifyExpression(Dialects.AnsiSql.Dialect, expr);
var expected =
"WITH Oldies AS (" +
"SELECT PersonRef.Name, PersonRef.Age " +
"FROM Person PersonRef " +
"WHERE PersonRef.Age > 40" +
"), YoungOnes AS (" +
"SELECT PersonRef.Name, PersonRef.Age " +
"FROM Person PersonRef " +
"WHERE PersonRef.Age <= 15" +
") " +
"SELECT OldiesRef.Name, YoungOnesRef.Name " +
"FROM Oldies OldiesRef " +
"INNER JOIN YoungOnes YoungOnesRef ON OldiesRef.Age - 30 = YoungOnesRef.Age";
Assert.That(result, Is.EqualTo(expected));
}
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 ItShouldBePossibleToHaveMultipleConditionsOnTheUpdate()
{
var stream =
S.UpdateNode(
S.UpdHead <Person>(S.Ust <Person>("Age", 42)),
S.Where(
S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Kalle'")),
S.Or(S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Pelle'"))),
S.And(S.BinExp(S.Col <Person>("Age"), BinaryOperation.LessThan, S.Const(18)))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result, Is.EqualTo("UPDATE Person SET Age = 42 WHERE Name = 'Kalle' OR Name = 'Pelle' AND Age < 18"));
}
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 ItShouldBePossibleToJoinATableToItself()
{
var child = Table <Person> .WithReferenceName("child");
var parent = Table <Person> .WithReferenceName("parent");
var stream =
S.SelectNode(
S.Select(S.Col(child, "Name"), S.Col(parent, "Name")),
S.From(
child,
S.Join(child, parent, JoinType.InnerJoin, S.BinExp(S.Col(child, "ParentId"), BinaryOperation.Equal, S.Col(parent, "Id")))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result,
Is.EqualTo("SELECT child.Name, parent.Name FROM Person child " +
"INNER JOIN Person parent ON child.ParentId = parent.Id"));
}
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 ItShouldBePossibleToUseAndAndOrOnAWhereStatementOnADeleteStatement()
{
var stream =
S.DeleteNode(
S.From <Person>(),
S.Where(
S.BinExp(S.Col <Person>("Age"), BinaryOperation.GreaterThan, S.Const(42)),
S.And(S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Kalle'"))),
S.Or(S.BinExp(S.Col <Person>("Name"), BinaryOperation.Equal, S.Const("'Henrik'")))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(result,
Is.EqualTo(
"DELETE FROM Person PersonRef " +
"WHERE PersonRef.Age > 42 " +
"AND PersonRef.Name = 'Kalle' " +
"OR PersonRef.Name = 'Henrik'"));
}
public void ItCanGenerateSqlForToLower()
{
var stream =
S.SelectNode(
S.Select(S.Func(AST.FunctionType.Lower, new[] { S.Col <Person>("Name") })),
S.From <Person>(),
S.Where(
S.BinExp(
S.Func(AST.FunctionType.Lower, new[] { S.Col <Person>("Name") }),
BinaryOperation.Equal,
S.Const("'kalle'"))
));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
string expected = "SELECT LOWER(PersonRef.Name) FROM Person PersonRef WHERE LOWER(PersonRef.Name) = 'kalle'";
Assert.That(result, Is.EqualTo(expected));
}
public void ItShouldBePossibleToDoPagingWithACommonTableExpression()
{
// To be honest, this case should be covered by the other test cases so this test case is a bit redundant.
// However, using common table expressions for paging is a quite common technique and it's good to know for sure that it works as expected, so
// let's do some bad practice testing and test something that's already covered by other tests!
var expr =
S.SelectNode(
S.With(
S.TableDef <PersonLitePagingResult>(
S.Select(
S.Col <Person>("Name"),
S.Col <Person>("Age"),
S.AliasedCol(
"RowNumber",
AggregateType.RowNumber,
S.Null(),
orderBy: new[] { S.OrderClause(S.Col <Person>("Age"), AST.Direction.Ascending) })),
S.From <Person>())
),
S.Select(S.Col <PersonLitePagingResult>("Name"), S.Col <PersonLitePagingResult>("Age")),
S.From <PersonLitePagingResult>(),
S.Where(
S.BinExp(
S.BinExp(S.Col <PersonLitePagingResult>("RowNumber"), BinaryOperation.GreaterThanOrEqual, S.Const(10)),
BinaryOperation.And,
S.BinExp(S.Col <PersonLitePagingResult>("RowNumber"), BinaryOperation.LessThan, S.Const(20))
)));
var result = SqlGen.SqlifyExpression(Dialects.AnsiSql.Dialect, expr);
var expected =
"WITH PersonLitePagingResult AS (" +
"SELECT PersonRef.Name, PersonRef.Age, ROW_NUMBER() OVER (ORDER BY PersonRef.Age ASC) AS RowNumber " +
"FROM Person PersonRef" +
") " +
"SELECT PersonLitePagingResultRef.Name, PersonLitePagingResultRef.Age " +
"FROM PersonLitePagingResult PersonLitePagingResultRef " +
"WHERE PersonLitePagingResultRef.RowNumber >= 10 AND PersonLitePagingResultRef.RowNumber < 20";
Assert.That(result, Is.EqualTo(expected));
}
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 ItShouldBePossibleToGroupByColumnsFromSeveralTables()
{
var stream =
S.SelectNode(
S.Select(S.Col <Person>("Age"), S.Col <Car>("Brand"), S.Aggregate(AggregateType.Count, S.Null())),
S.From <Person>(
S.Join <Person, Car>(
JoinType.InnerJoin,
S.BinExp(S.Col <Person>("Id"), BinaryOperation.Equal, S.Col <Car>("DriverId")))),
groupBy: S.GroupBy(S.Col <Person>("Age"), S.Col <Car>("Brand")));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
"SELECT PersonRef.Age, CarRef.Brand, COUNT(*) " +
"FROM Person PersonRef " +
"INNER JOIN Car CarRef ON PersonRef.Id = CarRef.DriverId " +
"GROUP BY PersonRef.Age, CarRef.Brand"));
}
public void ItShouldBePossibleToUseASingleHavingExpression()
{
var stream =
S.SelectNode(
S.Select(S.Col <Person>("Name"), S.Aggregate(AggregateType.Avg, S.Col <Person>("Age"))),
S.From <Person>(),
groupBy:
S.GroupBy(
new[] { S.Col <Person>("Name") },
S.And(S.BinExp(S.Aggregate(AggregateType.Avg, S.Col <Person>("Age")), BinaryOperation.GreaterThan, S.Const(42)))));
var result = SqlGen.SqlifyExpression(AnsiSql.Dialect, stream);
Assert.That(
result,
Is.EqualTo(
"SELECT PersonRef.Name, AVG(PersonRef.Age) " +
"FROM Person PersonRef " +
"GROUP BY PersonRef.Name " +
"HAVING AVG(PersonRef.Age) > 42"));
}
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 ItShouldBePossibleToJoinATableToItself()
{
var child = Table <Person> .WithReferenceName("child");
var parent = Table <Person> .WithReferenceName("parent");
var expr = Select.Column(child, p => new { p.Name })
.Column(parent, p => new { p.Name })
.From(child)
.InnerJoin(child, parent, (p1, p2) => p1.ParentId == p2.Id);
var result = expr.ToSqlExpression();
var expected =
S.SelectNode(
S.Select(S.Col(parent, "Name"), S.Col(child, "Name")),
S.From(
child,
S.Join(child, parent, JoinType.InnerJoin, S.BinExp(S.Col(child, "ParentId"), BinaryOperation.Equal, S.Col(parent, "Id")))));
Assert.That(result, Is.EqualTo(expected));
}
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));
}
