Deveel.Data.Sql.Query.FromTableSubQuerySource.ResolveColumnCount C# (CSharp) Method

        public int ResolveColumnCount(string catalog, string schema, string table, string column)
        {
            EnsureColumnNames();

            if (String.IsNullOrEmpty(catalog) &&
                String.IsNullOrEmpty(schema) &&
                String.IsNullOrEmpty(table) &&
                String.IsNullOrEmpty(column))
                return columnNames.Length;

            return columnNames.Count(v => Matches(v, catalog, schema, table, column));
        }