public static ValueNode AliasedCol <TTable>(AggregateType type, ValueNode parameter, string alias)
{
return(ValueNode.NewNamedColumn(
new AliasedColumnNode(
ValueNode.NewAggregate(new Tuple <AggregateType, ValueNode>(type, parameter)),
alias)));
}
public static OrderByClauseNode OrderClause(ValueNode col, Direction direction, NullsOrdering nullsOrdering = null)
{
return(new OrderByClauseNode(
direction,
nullsOrdering ?? NullsOrdering.NullsUndefined,
col));
}
public static JoinClauseNode Join <TSource, TTarget>(JoinType type, ValueNode joinExpr)
{
return(new JoinClauseNode(
new FSharpList <ITableIdentifier>(new TableIdentifier <TSource>(), FSharpList <ITableIdentifier> .Empty),
new TableIdentifier <TTarget>(),
type,
joinExpr.ToOption()));
}
public static ValueNode AliasedCol(
string alias,
AggregateType type,
ValueNode aggregateParameter,
IEnumerable <ValueNode> partitionBy = null,
IEnumerable <OrderByClauseNode> orderBy = null)
{
return(ValueNode.NewNamedColumn(
new AliasedColumnNode(
WinCol(type, aggregateParameter, partitionBy, orderBy),
alias)));
}
public static JoinClauseNode Join <TSource1, TSource2, TTarget>(
ITableIdentifier <TSource1> source1,
ITableIdentifier <TSource2> source2,
ITableIdentifier <TTarget> target,
JoinType type,
ValueNode joinExpr)
{
return(new JoinClauseNode(
ListModule.OfArray(new ITableIdentifier[] { source1, source2 }),
target,
type,
joinExpr.ToOption()));
}
public static ValueNode WinCol(
AggregateType type,
ValueNode aggregateParameter,
IEnumerable <ValueNode> partitionBy = null,
IEnumerable <OrderByClauseNode> orderBy = null)
{
return(ValueNode.NewWindowedColumn(
new Tuple <Tuple <AggregateType, ValueNode>, AST.WindowNode>(
new Tuple <AggregateType, ValueNode>(type, aggregateParameter),
new AST.WindowNode(
partitionBy == null ? ListModule.Empty <ValueNode>() : ListModule.OfSeq(partitionBy),
orderBy == null ? ListModule.Empty <OrderByClauseNode>() : ListModule.OfSeq(orderBy)))));
}
public void ItCanVisitAMultipleColumnSelector()
{
Expression <Func <Person, object> > func = (Person p) => new { p.Age, p.Name };
var tableRef = Types.TableReferenceFromType <Person>();
var ev = ExpressionVisitor.Visit(
ExpressionVisitor.VisitableExpression.NewLinqExpression(func),
new[] { tableRef }.ToContext()
);
var expected =
ValueNode.NewValueList(
ListModule.OfArray(new[] { S.Col <Person>("Age"), S.Col <Person>("Name") })).ToOption();
Assert.That(ev, Is.EqualTo(expected));
}
public static ValueNode SubExp(
SelectValuesExpressionNode select,
FromExpressionNode from,
WhereExpressionNode where = null,
GroupByExpressionNode groupBy = null,
OrderByExpressionNode orderBy = null)
{
return(ValueNode.NewSubExpression(
PlainSelectExpression.NewPlain(
new SelectExpressionToken(
select,
from,
where.ToOption(),
groupBy.ToOption(),
orderBy.ToOption()))));
}
public static ValueNode SubExp(
SelectValuesExpressionNode select,
FromExpressionNode from,
WhereExpressionNode where = null,
GroupByExpressionNode groupBy = null,
OrderByExpressionNode orderBy = null,
LimitOffsetNode limitOffset = null)
{
return(ValueNode.NewSubExpression(
PlainSelectExpression.NewPlain(
new SelectExpressionToken(
select,
from,
where.ToOption(),
groupBy.ToOption(),
orderBy.ToOption(),
limitOffset ?? new LimitOffsetNode(FSharpOption <int> .None, FSharpOption <int> .None)))));
}
public void ItShouldBeAbleToGenerateAliasesForBinaryExpressions()
{
Expression <Func <Person, object> > func = (Person p) => new { AgePlusTen = p.Age + 10 };
var tableRefs = new[]
{
Types.TableReferenceFromType <Person>(),
};
var ev = ExpressionVisitor.Visit(
ExpressionVisitor.VisitableExpression.NewLinqExpression(func),
tableRefs.ToContext());
var expected =
ValueNode.NewValueList(
ListModule.OfArray(new[] {
S.AliasedCol(S.BinExp(S.Col <Person>("Age"), BinaryOperation.Add, S.Const(10)), "AgePlusTen"),
})).ToOption();
Assert.That(ev, Is.EqualTo(expected));
}
public void ItShouldNotGenerateAliasColumnsForColumnsBeingAliasedToItsOrdinaryName()
{
Expression <Func <Person, object> > func = (Person p) => new { Name = p.Name, Age = p.Age };
var tableRefs = new[]
{
Types.TableReferenceFromType <Person>(),
};
var ev = ExpressionVisitor.Visit(
ExpressionVisitor.VisitableExpression.NewLinqExpression(func),
tableRefs.ToContext());
var expected =
ValueNode.NewValueList(
ListModule.OfArray(new[] {
S.Col <Person>("Name"),
S.Col <Person>("Age"),
})).ToOption();
Assert.That(ev, Is.EqualTo(expected));
}
public void ItShouldBeAbleToGenerateAliasesForConstants()
{
Expression <Func <Person, object> > func = (Person p) => new { FavoriteNumber = 42 };
var tableRefs = new[]
{
Types.TableReferenceFromType <Person>(),
};
var ev = ExpressionVisitor.Visit(
ExpressionVisitor.VisitableExpression.NewLinqExpression(func),
tableRefs.ToContext());
var expected =
ValueNode.NewValueList(
ListModule.OfArray(new[] {
S.AliasedCol(S.Const(42), "FavoriteNumber"),
})).ToOption();
Assert.That(ev, Is.EqualTo(expected));
}
public void ItShouldBeAbleToGenerateAliasedColumnTokens()
{
Expression <Func <Person, object> > func = (Person p) => new { p.Name, AgeOfPerson = p.Age, Count = Sql.Count() };
var tableRefs = new[]
{
Types.TableReferenceFromType <Person>(),
};
var ev = ExpressionVisitor.Visit(
ExpressionVisitor.VisitableExpression.NewLinqExpression(func),
tableRefs.ToContext());
var expected =
ValueNode.NewValueList(
ListModule.OfArray(new[] {
S.Col <Person>("Name"),
S.AliasedCol <Person>("Age", "AgeOfPerson"),
S.AliasedCol <Person>(AST.AggregateType.Count, S.Null(), "Count")
})).ToOption();
Assert.That(ev, Is.EqualTo(expected));
}
public static ValueNode AliasedCol(ValueNode node, string alias)
{
return(ValueNode.NewNamedColumn(new AliasedColumnNode(node, alias)));
}
public static ValueNode Star <TTable>()
{
return(ValueNode.NewStarColumn(Types.TableReferenceFromType <TTable>()));
}
public static ValueNode Col(ITableReference r, string colDef)
{
return(ValueNode.NewColumn(new Tuple <string, Type, ITableReference>(colDef, FigureOutTypeFor(colDef, r), r)));
}
public static ValueNode Col <TTable>(TableReferenceCreator <TTable> c, string colDef)
{
var tref = c.ToTableReference().Reference;
return(ValueNode.NewColumn(new Tuple <string, Type, ITableReference>(colDef, FigureOutTypeFor(colDef, tref), tref)));
}
public static ValueNode Col <TTable>(ITableIdentifier <TTable> r, string columnDef)
{
return(ValueNode.NewColumn(new Tuple <string, Type, ITableReference>(columnDef, FigureOutTypeFor(columnDef, r.Reference), r.Reference)));
}
public static UpdateSetToken Ust <TTableType>(string colDef, ValueNode node)
{
return(CreateUpdateSetToken <TTableType>(colDef, node));
}
public static WhereExpressionNode Where(ValueNode start, params WhereClauseNode[] additionalClauses)
{
return
(new WhereExpressionNode(start, ListModule.OfArray(additionalClauses)));
}
public static ValueNode Aggregate(AggregateType type, ValueNode parameter)
{
return(ValueNode.NewAggregate(new Tuple <AggregateType, ValueNode>(type, parameter)));
}
public static ValueNode AliasedCol <TTable>(string colDef, string alias)
{
var tref = Types.TableReferenceFromType <TTable>();
return(AliasedCol(ValueNode.NewColumn(new Tuple <string, Type, ITableReference>(colDef, FigureOutTypeFor(colDef, tref), tref)), alias));
}
public static ValueNode BinExp(ValueNode lhs, BinaryOperation op, ValueNode rhs)
{
return(ValueNode.NewBinaryExpression(new BinaryExpressionNode(lhs, op, rhs)));
}
public static ValueNode Func(FunctionType type, params ValueNode[] arguments)
{
return(ValueNode.NewFunctionCall(
new Tuple <FunctionType, FSharpList <ValueNode> >(type, ListModule.OfArray(arguments))));
}
public static ValueNode Const(object constant)
{
return(ValueNode.NewConstant(constant.ToString()));
}
public static WhereClauseNode Or(ValueNode stream)
{
return(new WhereClauseNode(ExpressionCombinatorType.Or, stream));
}
private static UpdateSetToken CreateUpdateSetToken <TTableType>(string colDef, ValueNode stream)
{
var tref = Types.TableReferenceFromType <TTableType>();
return(new UpdateSetToken(new Tuple <string, Type, ITableReference>(colDef, FigureOutTypeFor(colDef, tref), tref), stream));
}
public static ValueNode Col <TTableType>(string columnDef)
{
var tref = Types.TableReferenceFromType <TTableType>();
return(ValueNode.NewColumn(new Tuple <string, Type, ITableReference>(columnDef, FigureOutTypeFor(columnDef, tref), tref)));
}
public static ValueNode Param(string paramName)
{
return(ValueNode.NewParameter(paramName));
}