SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      Insus.NET
-- Blog:        https://insus.cnblogs.com
-- Create date: 2019-07-02
-- Update date: 2019-07-02
-- Description: 动态产生会计周期
-- =============================================
CREATE PROCEDURE [dbo].[usp_AccountingPeriod_Select_GeneratePeriodDate]
(
    @Fiscal_Year SMALLINT,
    @PeriodDateType NVARCHAR(1),
    @Start1 DATETIME
)
AS
BEGIN
    IF OBJECT_ID('#Period_Date') IS NOT NULL
        DROP TABLE #Period_Date
    
    CREATE TABLE #Period_Date(
        [Fiscal_Year] [smallint] NOT NULL,
        [Start1] [datetime] NULL,
        [Start2] [datetime] NULL,
        [Start3] [datetime] NULL,
        [Start4] [datetime] NULL,
        [Start5] [datetime] NULL,
        [Start6] [datetime] NULL,
        [Start7] [datetime] NULL,
        [Start8] [datetime] NULL,
        [Start9] [datetime] NULL,
        [Start10] [datetime] NULL,
        [Start11] [datetime] NULL,
        [Start12] [datetime] NULL,
        [Start13] [datetime] NULL,
        [End1] [datetime] NULL,
        [End2] [datetime] NULL,
        [End3] [datetime] NULL,
        [End4] [datetime] NULL,
        [End5] [datetime] NULL,
        [End6] [datetime] NULL,
        [End7] [datetime] NULL,
        [End8] [datetime] NULL,
        [End9] [datetime] NULL,
        [End10] [datetime] NULL,
        [End11] [datetime] NULL,
        [End12] [datetime] NULL,
        [End13] [datetime] NULL
    )    
    IF @Fiscal_Year >= YEAR([dbo].[svf_LowDate]()) AND @Fiscal_Year < YEAR([dbo].[svf_HighDate]())
    BEGIN
        IF @Start1 IS NULL        
            SET @Start1 = CONVERT(DATETIME, CONVERT(NVARCHAR(4),@Fiscal_Year) + '-01-01', 121)           
        INSERT INTO  #Period_Date ([Fiscal_Year]) VALUES (@Fiscal_Year)    
        IF @PeriodDateType = N'M'
        BEGIN
            DECLARE @m TINYINT = 1,@ms TINYINT = 12
            WHILE @m <= @ms
            BEGIN
                DECLARE @m_start_field NVARCHAR(128) = N'[Start'+ CONVERT(NVARCHAR(2), @m) +']'
                DECLARE @m_start_value DATETIME = DATEADD(M,@m -1,@Start1)    
                
                DECLARE @m_end_field NVARCHAR(128) = N'[End'+ CONVERT(NVARCHAR(2), @m) +']'
                DECLARE @m_end_value DATETIME = DATEADD(DAY,-1, DATEADD(M,@m,@Start1))    
                
                DECLARE @s_sql NVARCHAR(4000) = N'
                UPDATE #Period_Date SET '+ @m_start_field +' = '''+ CONVERT(NVARCHAR(40), @m_start_value ) +''',
                                        '+ @m_end_field +' = '''+ CONVERT(NVARCHAR(40), @m_end_value ) +''' 
                WHERE [Fiscal_Year] = '''+ CONVERT(NVARCHAR(4),@Fiscal_Year) +''''
                EXECUTE sp_executesql @s_sql
                SET @m = @m + 1
            END
        END
 
        IF  @PeriodDateType = N'Q'
        BEGIN
        DECLARE @q TINYINT = 1,@qs TINYINT = 4
            WHILE @q <= @qs
            BEGIN
                DECLARE @q_start_field NVARCHAR(128) = N'[Start'+ CONVERT(NVARCHAR(2), @q) +']'
                DECLARE @q_start_value DATETIME = DATEADD(QUARTER,@q -1,@Start1)    
                
                DECLARE @q_end_field NVARCHAR(128) = N'[End'+ CONVERT(NVARCHAR(2), @q) +']'
                DECLARE @q_end_value DATETIME = DATEADD(DAY,-1, DATEADD(QUARTER,@q,@Start1))    
                
                DECLARE @q_s_sql NVARCHAR(4000) = N'
                UPDATE #Period_Date SET '+ @q_start_field +' = '''+ CONVERT(NVARCHAR(40), @q_start_value ) +''',
                                        '+ @q_end_field +' = '''+ CONVERT(NVARCHAR(40), @q_end_value ) +''' 
                WHERE [Fiscal_Year] = '''+ CONVERT(NVARCHAR(4),@Fiscal_Year) +''''
                EXECUTE sp_executesql @q_s_sql
                SET @q = @q + 1
            END
        END
    END
 
    SELECT [Fiscal_Year],
            [Start1],[Start2],[Start3],[Start4],
            [Start5],[Start6],[Start7],[Start8],
            [Start9],[Start10],[Start11],[Start12],
            [Start13],
            [End1],[End2],[End3],[End4],
            [End5],[End6],[End7],[End8],
            [End9],[End10],[End11],[End12],
            [End13] 
    FROM #Period_Date
END