Convert AutoQuery query string to SqlExpression - servicestack

Question

I am trying to re-create AutoQuery queries outside of a service request. I am doing this because I give user option to save a request and then use that data elsewhere. I save the query string data so I am trying to create a query from the saved query string.
I need 2 things.
1) query that returns the complete data not limited by default autoquery page size
2) query that returns the count
I tried making the query like this:
IAutoQueryDb _autoQuery = HostContext.TryResolve<IAutoQueryDb>();
var dto = new MyQueryDbClass();
Dictionary<string, string> pars = GetParameters();
var query = _autoQuery.CreateQuery(dto, pars);
The problem with this is that the query generated has the table name of the response object and not the actual table so it doesn't work. Also I am unable to call ToCountSatement() on it. It is also limited by my default page size.
Is there a way to convert the AutoQuery query string to a SqlExpression so I can execute it and also get count statement?

Answer 1

The CreateQuery() API returns a populated SqlExpression<Table> similar to what would have been created if manually constructing the query yourself, e.g:
SqlExpression<Table> query = _autoQuery.CreateQuery(dto, pars);
To clear the paging info you can call .Limit() without arguments which will clear any populated Offset/Rows values:
query.Limit();
The Custom AutoQuery Implementations docs shows an example of AutoQuery executes the query behind the scenes, e.g. you can get the total with:
var total = Db.Count(query);