/// <summary>
/// Execute a SELECT query.
/// </summary>
/// <param name="tableName">The table from which you wish to SELECT.</param>
/// <param name="indexStart">The starting index for retrieval; used for pagination in conjunction with maxResults and orderByClause. orderByClause example: ORDER BY created DESC.</param>
/// <param name="maxResults">The maximum number of results to retrieve.</param>
/// <param name="returnFields">The fields you wish to have returned. Null returns all.</param>
/// <param name="filter">The expression containing the SELECT filter (i.e. WHERE clause data).</param>
/// <param name="orderByClause">Specify an ORDER BY clause if desired.</param>
/// <returns>A DataTable containing the results.</returns>
public DataTable Select(string tableName, int?indexStart, int?maxResults, List <string> returnFields, Expression filter, string orderByClause)
{
if (String.IsNullOrEmpty(tableName))
{
throw new ArgumentNullException(nameof(tableName));
}
return(Query(PostgresqlHelper.SelectQuery(tableName, indexStart, maxResults, returnFields, filter, orderByClause)));
}
