internal static List <T> Select <T>(this IDbCommand dbCmd, SqlExpression <T> expression)
{
string sql = expression.SelectInto <T>();
return(dbCmd.ExprConvertToList <T>(sql));
}
internal static T Single <T>(this IDbCommand dbCmd, SqlExpression <T> expression)
{
string sql = expression.Limit(1).SelectInto <T>();
return(dbCmd.ExprConvertTo <T>(sql));
}
internal static List <Into> LoadSelect <Into, From>(this IDbCommand dbCmd, SqlExpression <From> expression)
{
return(dbCmd.LoadListWithReferences <Into, From>(expression));
}
internal static List <T> LoadSelect <T>(this IDbCommand dbCmd, SqlExpression <T> expression = null)
{
return(dbCmd.LoadListWithReferences <T, T>(expression));
}
internal static long RowCount <T>(this IDbCommand dbCmd, SqlExpression <T> expression)
{
return(dbCmd.Scalar <long>(dbCmd.GetDialectProvider().ToRowCountStatement(expression.ToSelectStatement())));
}
internal static long Count <T>(this IDbCommand dbCmd, SqlExpression <T> expression)
{
var sql = expression.ToCountStatement();
return(GetCount(dbCmd, sql));
}
internal static List <Into> LoadListWithReferences <Into, From>(this IDbCommand dbCmd, SqlExpression <From> expr = null, IEnumerable <string> include = null)
{
var loadList = new LoadListSync <Into, From>(dbCmd, expr);
var fieldDefs = loadList.FieldDefs;
var includeSet = include != null
? new HashSet <string>(include, StringComparer.OrdinalIgnoreCase)
: null;
foreach (var fieldDef in fieldDefs)
{
if (includeSet != null && !includeSet.Contains(fieldDef.Name))
{
continue;
}
var listInterface = fieldDef.FieldType.GetTypeWithGenericInterfaceOf(typeof(IList <>));
if (listInterface != null)
{
loadList.SetRefFieldList(fieldDef, listInterface.GetGenericArguments()[0]);
}
else
{
loadList.SetRefField(fieldDef, fieldDef.FieldType);
}
}
return(loadList.ParentResults);
}
