protected override Expression VisitFunction(FunctionExpression func)
{
if (this.linguist.Language.IsRowsAffectedExpressions(func))
{
return(Expression.Property(this.executor, "RowsAffected"));
}
return(base.VisitFunction(func));
}
protected FunctionExpression UpdateFunction(FunctionExpression func, string name, IEnumerable <Expression> arguments)
{
if (name != func.Name || arguments != func.Arguments)
{
return(new FunctionExpression(func.Type, name, arguments));
}
return(func);
}
protected virtual Expression VisitFunction(FunctionExpression function)
{
this.Write("FUNCTION ");
this.Write(function.Name);
if (function.Arguments.Count > 0)
{
this.Write("(");
this.VisitExpressionList(function.Arguments);
this.Write(")");
}
return(function);
}
protected override Expression VisitFunction(FunctionExpression func)
{
this.Write(func.Name);
if (func.Arguments.Count > 0)
{
this.Write("(");
for (int i = 0, n = func.Arguments.Count; i < n; i++)
{
if (i > 0)
{
this.Write(", ");
}
this.Visit(func.Arguments[i]);
}
this.Write(")");
}
return(func);
}
protected virtual Expression VisitFunction(FunctionExpression func)
{
var arguments = VisitExpressionList(func.Arguments);
return(UpdateFunction(func, func.Name, arguments));
}
/// <summary>
/// True if the expression is a rows-affected expression.
/// </summary>
public virtual bool IsRowsAffectedExpressions(Expression expression)
{
FunctionExpression fex = expression as FunctionExpression;
return(fex != null && fex.Name == "@@ROWCOUNT");
}
protected virtual bool CompareFunction(FunctionExpression x, FunctionExpression y)
{
return(x.Name == y.Name && this.CompareExpressionList(x.Arguments, y.Arguments));
}