private void VisitFunction(Function function)
{
switch (function.Type)
{
case Function.FunctionType.Coalesce:
_sql.Coalesce(x => VisitProjection(function.Coalesce.First),
x => VisitProjection(function.Coalesce.Second));
break;
case Function.FunctionType.Convert:
_sql.Cast(x => VisitProjection(function.Convert.Value), function.Convert.Type, 0, null, null);
break;
case Function.FunctionType.IndexOf:
_sql.IndexOf(x => VisitProjection(function.IndexOf.Text),
x => VisitProjection(function.IndexOf.Value));
break;
case Function.FunctionType.IndexOfAt:
_sql.IndexOf(x => VisitProjection(function.IndexOfAt.Text),
x => VisitProjection(function.IndexOfAt.Value),
x => VisitProjection(function.IndexOfAt.Start));
break;
case Function.FunctionType.Insert:
_sql.Insert(x => VisitProjection(function.Insert.Text),
x => VisitProjection(function.Insert.Value),
x => VisitProjection(function.Insert.Start));
break;
case Function.FunctionType.Length:
_sql.Length(x => VisitProjection(function.Length.Text));
break;
case Function.FunctionType.Replace:
_sql.Replace(x => VisitProjection(function.Replace.Text),
x => VisitProjection(function.Replace.SearchValue),
x => VisitProjection(function.Replace.ReplaceValue));
break;
case Function.FunctionType.Substring:
_sql.Substring(x => VisitProjection(function.Substring.Text),
x => VisitProjection(function.Substring.Start));
break;
case Function.FunctionType.SubstringFixed:
_sql.Substring(x => VisitProjection(function.SubstringFixed.Text),
x => VisitProjection(function.SubstringFixed.Start),
x => VisitProjection(function.SubstringFixed.Length));
break;
case Function.FunctionType.ToLower:
_sql.ToLower(x => VisitProjection(function.ToLower.Text));
break;
case Function.FunctionType.ToString:
_sql.Cast(x => VisitProjection(function.ToString.Value), typeof(string), 0, null, null);
break;
case Function.FunctionType.ToUpper:
_sql.ToUpper(x => VisitProjection(function.ToUpper.Text));
break;
case Function.FunctionType.Trim:
_sql.Trim(x => VisitProjection(function.Trim.Text));
break;
case Function.FunctionType.TrimEnd:
_sql.RightTrim(x => VisitProjection(function.TrimEnd.Text));
break;
case Function.FunctionType.TrimStart:
_sql.LeftTrim(x => VisitProjection(function.TrimStart.Text));
break;
case Function.FunctionType.Hash:
_sql.Hash(x => VisitProjection(function.Hash.Value), function.Hash.Type == Function.HashParameters.HashType.Md5 ?
SqlWriter.HashAlgorithm.Md5 : SqlWriter.HashAlgorithm.Sha1);
break;
case Function.FunctionType.ToHex:
_sql.ToHex(x => VisitProjection(function.ToHex.Value));
break;
}
}