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Convertion of binary representation of ip addresses into varchar.
-- SELECT dbo.fn_ConvertBinaryToIpAddress(0x200201FF06C200000000000001FF06C2)
-- SELECT dbo.fn_ConvertBinaryToIpAddress(0x0000000000000000000000000A0118FF)
ALTER FUNCTION [dbo].[fn_ConvertBinaryToIpAddress]
(
@bytes BINARY(16)
)
RETURNS VARCHAR(39) AS
BEGIN
DECLARE
@part VARBINARY(2)
, @colIndex TINYINT
, @ipAddress VARCHAR(39)
SET @ipAddress = ''
IF SUBSTRING(@bytes, 1, 12) = 0x000000000000000000000000
BEGIN
SET @colIndex = 13
WHILE @colIndex <= 16
SELECT
@part = SUBSTRING(@bytes, @colIndex, 1)
, @ipAddress = @ipAddress
+ CAST(CAST(@part AS TINYINT) AS VARCHAR(3))
+ CASE @colIndex WHEN 16 THEN '' ELSE '.' END
, @colIndex = @colIndex + 1
IF @ipAddress = '0.0.0.1'
SET @ipAddress = '::1'
END
ELSE
BEGIN
SET @colIndex = 1
WHILE @colIndex <= 16
BEGIN
SET @part = SUBSTRING(@bytes, @colIndex, 2)
SELECT
@ipAddress = @ipAddress
+ CAST('' as xml).value('xs:hexBinary(sql:variable("@part") )', 'varchar(4)')
+ CASE @colIndex WHEN 15 THEN '' ELSE ':' END
, @colIndex = @colIndex + 2
END
END
RETURN @ipAddress
END
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