public virtual void Visit(FunctionExpression op)
{
if (op is Functions.CurrentDateTime || op is Functions.CurrentUtcDateTime)
{
Writer.Write("getutcdate()");
}
else
{
throw new NotSupportedException();
}
}
void IExpressionVisitor.Visit(FunctionExpression op)
{
_clone = op.Clone(CloneAndReturn);
}
void IExpressionVisitor.Visit(FunctionExpression op)
{
throw new NotSupportedException();
}
public void Visit(FunctionExpression op)
{
var name = op.Name.ToLowerInvariant();
switch (name)
{
case "length":
case "tolower":
case "toupper":
case "trim":
case "day":
case "hour":
case "minute":
case "month":
case "second":
case "year":
case "ceiling":
case "floor":
case "startswith":
case "endswith":
case "contains":
// Do nothing
break;
case "round":
if (!(op.Args.Skip(1).First() is IntegerLiteral iLit && iLit.Value == 0))
{
throw new NotSupportedException();
}
break;
case "indexof_zero":
name = "indexof";
break;
case "substring_zero":
name = "substring";
break;
case "truncatetime":
name = "date";
break;
case "currentdatetime":
case "currentutcdatetime":
name = "now";
break;
default:
op.Evaluate().Visit(this);
return;
}
WriteEncoded(name);
WriteEncoded("(");
var first = true;
foreach (var arg in op.Args)
{
if (!first)
{
WriteEncoded(",");
}
first = false;
arg.Visit(this);
}
WriteEncoded(")");
}