In genere, memorizzo un TimeSpan come un bigint popolato con segni di spunta dalla proprietà TimeSpan.Ticks come suggerito in precedenza. È inoltre possibile memorizzare un TimeSpan come varchar (26) popolato con l'output di TimeSpan.ToString (). Le quattro funzioni scalari (ConvertFromTimeSpanString, ConvertToTimeSpanString, DateAddTicks, DateDiffTicks) che ho scritto sono utili per gestire TimeSpan sul lato SQL ed evitare gli hack che produrrebbero intervalli con limiti artificiali. Se riesci a memorizzare l'intervallo in un TimeSpan .NET, dovrebbe funzionare anche con queste funzioni. Inoltre, le funzioni consentono di lavorare con TimeSpans e tick da 100 nanosecondi anche quando si utilizzano tecnologie che non includono .NET Framework.
DROP FUNCTION [dbo].[DateDiffTicks]
GO
DROP FUNCTION [dbo].[DateAddTicks]
GO
DROP FUNCTION [dbo].[ConvertToTimeSpanString]
GO
DROP FUNCTION [dbo].[ConvertFromTimeSpanString]
GO
SET ANSI_NULLS OFF
GO
SET QUOTED_IDENTIFIER OFF
GO
-- =============================================
-- Author: James Coe
-- Create date: 2011-05-23
-- Description: Converts from a varchar(26) TimeSpan string to a bigint containing the number of 100 nanosecond ticks.
-- =============================================
/*
[-][d.]hh:mm:ss[.fffffff]
"-"
A minus sign, which indicates a negative time interval. No sign is included for a positive time span.
"d"
The number of days in the time interval. This element is omitted if the time interval is less than one day.
"hh"
The number of hours in the time interval, ranging from 0 to 23.
"mm"
The number of minutes in the time interval, ranging from 0 to 59.
"ss"
The number of seconds in the time interval, ranging from 0 to 59.
"fffffff"
Fractional seconds in the time interval. This element is omitted if the time interval does not include
fractional seconds. If present, fractional seconds are always expressed using seven decimal digits.
*/
CREATE FUNCTION [dbo].[ConvertFromTimeSpanString] (@timeSpan varchar(26))
RETURNS bigint
AS
BEGIN
DECLARE @hourStart int
DECLARE @minuteStart int
DECLARE @secondStart int
DECLARE @ticks bigint
DECLARE @hours bigint
DECLARE @minutes bigint
DECLARE @seconds DECIMAL(9, 7)
SET @hourStart = CHARINDEX('.', @timeSpan) + 1
SET @minuteStart = CHARINDEX(':', @timeSpan) + 1
SET @secondStart = CHARINDEX(':', @timespan, @minuteStart) + 1
SET @ticks = 0
IF (@hourStart > 1 AND @hourStart < @minuteStart)
BEGIN
SET @ticks = CONVERT(bigint, LEFT(@timespan, @hourstart - 2)) * 864000000000
END
ELSE
BEGIN
SET @hourStart = 1
END
SET @hours = CONVERT(bigint, SUBSTRING(@timespan, @hourStart, @minuteStart - @hourStart - 1))
SET @minutes = CONVERT(bigint, SUBSTRING(@timespan, @minuteStart, @secondStart - @minuteStart - 1))
SET @seconds = CONVERT(DECIMAL(9, 7), SUBSTRING(@timespan, @secondStart, LEN(@timeSpan) - @secondStart + 1))
IF (@ticks < 0)
BEGIN
SET @ticks = @ticks - @hours * 36000000000
END
ELSE
BEGIN
SET @ticks = @ticks + @hours * 36000000000
END
IF (@ticks < 0)
BEGIN
SET @ticks = @ticks - @minutes * 600000000
END
ELSE
BEGIN
SET @ticks = @ticks + @minutes * 600000000
END
IF (@ticks < 0)
BEGIN
SET @ticks = @ticks - @seconds * 10000000.0
END
ELSE
BEGIN
SET @ticks = @ticks + @seconds * 10000000.0
END
RETURN @ticks
END
GO
-- =============================================
-- Author: James Coe
-- Create date: 2011-05-23
-- Description: Converts from a bigint containing the number of 100 nanosecond ticks to a varchar(26) TimeSpan string.
-- =============================================
/*
[-][d.]hh:mm:ss[.fffffff]
"-"
A minus sign, which indicates a negative time interval. No sign is included for a positive time span.
"d"
The number of days in the time interval. This element is omitted if the time interval is less than one day.
"hh"
The number of hours in the time interval, ranging from 0 to 23.
"mm"
The number of minutes in the time interval, ranging from 0 to 59.
"ss"
The number of seconds in the time interval, ranging from 0 to 59.
"fffffff"
Fractional seconds in the time interval. This element is omitted if the time interval does not include
fractional seconds. If present, fractional seconds are always expressed using seven decimal digits.
*/
CREATE FUNCTION [dbo].[ConvertToTimeSpanString] (@ticks bigint)
RETURNS varchar(26)
AS
BEGIN
DECLARE @timeSpanString varchar(26)
IF (@ticks < 0)
BEGIN
SET @timeSpanString = '-'
END
ELSE
BEGIN
SET @timeSpanString = ''
END
-- Days
DECLARE @days bigint
SET @days = FLOOR(ABS(@ticks / 864000000000.0))
IF (@days > 0)
BEGIN
SET @timeSpanString = @timeSpanString + CONVERT(varchar(26), @days) + '.'
END
SET @ticks = ABS(@ticks % 864000000000)
-- Hours
SET @timeSpanString = @timeSpanString + RIGHT('0' + CONVERT(varchar(26), FLOOR(@ticks / 36000000000.0)), 2) + ':'
SET @ticks = @ticks % 36000000000
-- Minutes
SET @timeSpanString = @timeSpanString + RIGHT('0' + CONVERT(varchar(26), FLOOR(@ticks / 600000000.0)), 2) + ':'
SET @ticks = @ticks % 600000000
-- Seconds
SET @timeSpanString = @timeSpanString + RIGHT('0' + CONVERT(varchar(26), FLOOR(@ticks / 10000000.0)), 2)
SET @ticks = @ticks % 10000000
-- Fractional Seconds
IF (@ticks > 0)
BEGIN
SET @timeSpanString = @timeSpanString + '.' + LEFT(CONVERT(varchar(26), @ticks) + '0000000', 7)
END
RETURN @timeSpanString
END
GO
-- =============================================
-- Author: James Coe
-- Create date: 2011-05-23
-- Description: Adds the specified number of 100 nanosecond ticks to a date.
-- =============================================
CREATE FUNCTION [dbo].[DateAddTicks] (
@ticks bigint
, @starting_date datetimeoffset
)
RETURNS datetimeoffset
AS
BEGIN
DECLARE @dateTimeResult datetimeoffset
IF (@ticks < 0)
BEGIN
-- Hours
SET @dateTimeResult = DATEADD(HOUR, CEILING(@ticks / 36000000000.0), @starting_date)
SET @ticks = @ticks % 36000000000
-- Seconds
SET @dateTimeResult = DATEADD(SECOND, CEILING(@ticks / 10000000.0), @dateTimeResult)
SET @ticks = @ticks % 10000000
-- Nanoseconds
SET @dateTimeResult = DATEADD(NANOSECOND, @ticks * 100, @dateTimeResult)
END
ELSE
BEGIN
-- Hours
SET @dateTimeResult = DATEADD(HOUR, FLOOR(@ticks / 36000000000.0), @starting_date)
SET @ticks = @ticks % 36000000000
-- Seconds
SET @dateTimeResult = DATEADD(SECOND, FLOOR(@ticks / 10000000.0), @dateTimeResult)
SET @ticks = @ticks % 10000000
-- Nanoseconds
SET @dateTimeResult = DATEADD(NANOSECOND, @ticks * 100, @dateTimeResult)
END
RETURN @dateTimeResult
END
GO
-- =============================================
-- Author: James Coe
-- Create date: 2011-05-23
-- Description: Gets the difference between two dates in 100 nanosecond ticks.
-- =============================================
CREATE FUNCTION [dbo].[DateDiffTicks] (
@starting_date datetimeoffset
, @ending_date datetimeoffset
)
RETURNS bigint
AS
BEGIN
DECLARE @ticks bigint
DECLARE @days bigint
DECLARE @hours bigint
DECLARE @minutes bigint
DECLARE @seconds bigint
SET @hours = DATEDIFF(HOUR, @starting_date, @ending_date)
SET @starting_date = DATEADD(HOUR, @hours, @starting_date)
SET @ticks = @hours * 36000000000
SET @seconds = DATEDIFF(SECOND, @starting_date, @ending_date)
SET @starting_date = DATEADD(SECOND, @seconds, @starting_date)
SET @ticks = @ticks + @seconds * 10000000
SET @ticks = @ticks + CONVERT(bigint, DATEDIFF(NANOSECOND, @starting_date, @ending_date)) / 100
RETURN @ticks
END
GO
--- BEGIN Test Harness ---
SET NOCOUNT ON
DECLARE @dateTimeOffsetMinValue datetimeoffset
DECLARE @dateTimeOffsetMaxValue datetimeoffset
DECLARE @timeSpanMinValueString varchar(26)
DECLARE @timeSpanZeroString varchar(26)
DECLARE @timeSpanMaxValueString varchar(26)
DECLARE @timeSpanMinValueTicks bigint
DECLARE @timeSpanZeroTicks bigint
DECLARE @timeSpanMaxValueTicks bigint
DECLARE @dateTimeOffsetMinMaxDiffTicks bigint
DECLARE @dateTimeOffsetMaxMinDiffTicks bigint
SET @dateTimeOffsetMinValue = '0001-01-01T00:00:00.0000000+00:00'
SET @dateTimeOffsetMaxValue = '9999-12-31T23:59:59.9999999+00:00'
SET @timeSpanMinValueString = '-10675199.02:48:05.4775808'
SET @timeSpanZeroString = '00:00:00'
SET @timeSpanMaxValueString = '10675199.02:48:05.4775807'
SET @timeSpanMinValueTicks = -9223372036854775808
SET @timeSpanZeroTicks = 0
SET @timeSpanMaxValueTicks = 9223372036854775807
SET @dateTimeOffsetMinMaxDiffTicks = 3155378975999999999
SET @dateTimeOffsetMaxMinDiffTicks = -3155378975999999999
-- TimeSpan Conversion Tests
PRINT 'Testing TimeSpan conversions...'
DECLARE @convertToTimeSpanStringMinTicksResult varchar(26)
DECLARE @convertFromTimeSpanStringMinTimeSpanResult bigint
DECLARE @convertToTimeSpanStringZeroTicksResult varchar(26)
DECLARE @convertFromTimeSpanStringZeroTimeSpanResult bigint
DECLARE @convertToTimeSpanStringMaxTicksResult varchar(26)
DECLARE @convertFromTimeSpanStringMaxTimeSpanResult bigint
SET @convertToTimeSpanStringMinTicksResult = dbo.ConvertToTimeSpanString(@timeSpanMinValueTicks)
SET @convertFromTimeSpanStringMinTimeSpanResult = dbo.ConvertFromTimeSpanString(@timeSpanMinValueString)
SET @convertToTimeSpanStringZeroTicksResult = dbo.ConvertToTimeSpanString(@timeSpanZeroTicks)
SET @convertFromTimeSpanStringZeroTimeSpanResult = dbo.ConvertFromTimeSpanString(@timeSpanZeroString)
SET @convertToTimeSpanStringMaxTicksResult = dbo.ConvertToTimeSpanString(@timeSpanMaxValueTicks)
SET @convertFromTimeSpanStringMaxTimeSpanResult = dbo.ConvertFromTimeSpanString(@timeSpanMaxValueString)
-- Test Results
SELECT 'Convert to TimeSpan String from Ticks (Minimum)' AS Test
, CASE
WHEN @convertToTimeSpanStringMinTicksResult = @timeSpanMinValueString
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @timeSpanMinValueTicks AS [Ticks]
, CONVERT(varchar(26), NULL) AS [TimeSpan String]
, CONVERT(varchar(26), @convertToTimeSpanStringMinTicksResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanMinValueString) AS [Expected Result]
UNION ALL
SELECT 'Convert from TimeSpan String to Ticks (Minimum)' AS Test
, CASE
WHEN @convertFromTimeSpanStringMinTimeSpanResult = @timeSpanMinValueTicks
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, NULL AS [Ticks]
, @timeSpanMinValueString AS [TimeSpan String]
, CONVERT(varchar(26), @convertFromTimeSpanStringMinTimeSpanResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanMinValueTicks) AS [Expected Result]
UNION ALL
SELECT 'Convert to TimeSpan String from Ticks (Zero)' AS Test
, CASE
WHEN @convertToTimeSpanStringZeroTicksResult = @timeSpanZeroString
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @timeSpanZeroTicks AS [Ticks]
, CONVERT(varchar(26), NULL) AS [TimeSpan String]
, CONVERT(varchar(26), @convertToTimeSpanStringZeroTicksResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanZeroString) AS [Expected Result]
UNION ALL
SELECT 'Convert from TimeSpan String to Ticks (Zero)' AS Test
, CASE
WHEN @convertFromTimeSpanStringZeroTimeSpanResult = @timeSpanZeroTicks
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, NULL AS [Ticks]
, @timeSpanZeroString AS [TimeSpan String]
, CONVERT(varchar(26), @convertFromTimeSpanStringZeroTimeSpanResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanZeroTicks) AS [Expected Result]
UNION ALL
SELECT 'Convert to TimeSpan String from Ticks (Maximum)' AS Test
, CASE
WHEN @convertToTimeSpanStringMaxTicksResult = @timeSpanMaxValueString
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @timeSpanMaxValueTicks AS [Ticks]
, CONVERT(varchar(26), NULL) AS [TimeSpan String]
, CONVERT(varchar(26), @convertToTimeSpanStringMaxTicksResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanMaxValueString) AS [Expected Result]
UNION ALL
SELECT 'Convert from TimeSpan String to Ticks (Maximum)' AS Test
, CASE
WHEN @convertFromTimeSpanStringMaxTimeSpanResult = @timeSpanMaxValueTicks
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, NULL AS [Ticks]
, @timeSpanMaxValueString AS [TimeSpan String]
, CONVERT(varchar(26), @convertFromTimeSpanStringMaxTimeSpanResult) AS [Actual Result]
, CONVERT(varchar(26), @timeSpanMaxValueTicks) AS [Expected Result]
-- Ticks Date Add Test
PRINT 'Testing DateAddTicks...'
DECLARE @DateAddTicksPositiveTicksResult datetimeoffset
DECLARE @DateAddTicksZeroTicksResult datetimeoffset
DECLARE @DateAddTicksNegativeTicksResult datetimeoffset
SET @DateAddTicksPositiveTicksResult = dbo.DateAddTicks(@dateTimeOffsetMinMaxDiffTicks, @dateTimeOffsetMinValue)
SET @DateAddTicksZeroTicksResult = dbo.DateAddTicks(@timeSpanZeroTicks, @dateTimeOffsetMinValue)
SET @DateAddTicksNegativeTicksResult = dbo.DateAddTicks(@dateTimeOffsetMaxMinDiffTicks, @dateTimeOffsetMaxValue)
-- Test Results
SELECT 'Date Add with Ticks Test (Positive)' AS Test
, CASE
WHEN @DateAddTicksPositiveTicksResult = @dateTimeOffsetMaxValue
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @dateTimeOffsetMinMaxDiffTicks AS [Ticks]
, @dateTimeOffsetMinValue AS [Starting Date]
, @DateAddTicksPositiveTicksResult AS [Actual Result]
, @dateTimeOffsetMaxValue AS [Expected Result]
UNION ALL
SELECT 'Date Add with Ticks Test (Zero)' AS Test
, CASE
WHEN @DateAddTicksZeroTicksResult = @dateTimeOffsetMinValue
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @timeSpanZeroTicks AS [Ticks]
, @dateTimeOffsetMinValue AS [Starting Date]
, @DateAddTicksZeroTicksResult AS [Actual Result]
, @dateTimeOffsetMinValue AS [Expected Result]
UNION ALL
SELECT 'Date Add with Ticks Test (Negative)' AS Test
, CASE
WHEN @DateAddTicksNegativeTicksResult = @dateTimeOffsetMinValue
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @dateTimeOffsetMaxMinDiffTicks AS [Ticks]
, @dateTimeOffsetMaxValue AS [Starting Date]
, @DateAddTicksNegativeTicksResult AS [Actual Result]
, @dateTimeOffsetMinValue AS [Expected Result]
-- Ticks Date Diff Test
PRINT 'Testing Date Diff Ticks...'
DECLARE @dateDiffTicksMinMaxResult bigint
DECLARE @dateDiffTicksMaxMinResult bigint
SET @dateDiffTicksMinMaxResult = dbo.DateDiffTicks(@dateTimeOffsetMinValue, @dateTimeOffsetMaxValue)
SET @dateDiffTicksMaxMinResult = dbo.DateDiffTicks(@dateTimeOffsetMaxValue, @dateTimeOffsetMinValue)
-- Test Results
SELECT 'Date Difference in Ticks Test (Min, Max)' AS Test
, CASE
WHEN @dateDiffTicksMinMaxResult = @dateTimeOffsetMinMaxDiffTicks
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @dateTimeOffsetMinValue AS [Starting Date]
, @dateTimeOffsetMaxValue AS [Ending Date]
, @dateDiffTicksMinMaxResult AS [Actual Result]
, @dateTimeOffsetMinMaxDiffTicks AS [Expected Result]
UNION ALL
SELECT 'Date Difference in Ticks Test (Max, Min)' AS Test
, CASE
WHEN @dateDiffTicksMaxMinResult = @dateTimeOffsetMaxMinDiffTicks
THEN 'Pass'
ELSE 'Fail'
END AS [Test Status]
, @dateTimeOffsetMaxValue AS [Starting Date]
, @dateTimeOffsetMinValue AS [Ending Date]
, @dateDiffTicksMaxMinResult AS [Actual Result]
, @dateTimeOffsetMaxMinDiffTicks AS [Expected Result]
PRINT 'Tests Complete.'
GO
--- END Test Harness ---