SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE [dbo].[p_grid_pol_periods]
	@period_code AS ais_code_short 
AS
BEGIN
	SET NOCOUNT ON

	SELECT	*
	FROM pol_periods
	WHERE @period_code LIKE '%' OR per_period_code = @period_code
END
GO
