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Friday, July 22, 2011

Numeric IP - SSIM Representation

IPs in the SSIM as of 4.7.3 are represented in both positive and negative form. To convert from an IP to this form, use the following, replacing [ipvariable] with your dotted quad IP:

SELECT CASE WHEN (IPNumber - 2147483648) > 0 THEN IPNumber -(2*2147483648) ELSE IPNumber END AS IPNUMBER2 FROM ( SELECT 16777216 *
CAST(LEFT(IPNumber1, LOCATE('.', IPNumber1, 1)-1) AS BIGINT) + 65536 * CAST(SUBSTR(IPNumber1, LOCATE('.', IPNumber1, 1) + 1, LOCATE('.',
IPNumber1,LOCATE('.', IPNumber1, 1) +1) - LOCATE('.', IPNumber1, 1) - 1) AS BIGINT) + 256 * CAST(SUBSTR(IPNumber1, LOCATE('.',
IPNumber1,LOCATE('.', IPNumber1, 1) +1) + 1, LOCATE('.', IPNumber1, LOCATE('.', IPNumber1,LOCATE('.', IPNumber1, 1) +1) +1) - LOCATE('.',
IPNumber1,LOCATE('.', IPNumber1, 1) +1) - 1) AS BIGINT) + CAST(RIGHT(IPNumber1, LENGTH(IPNumber1) - LOCATE('.', IPNumber1,
LOCATE('.', IPNumber1,LOCATE('.', IPNumber1, 1) +1) +1)) AS BIGINT) AS IPNumber FROM (SELECT '[ipvariable]' AS IPNumber1 FROM
SYSIBM.SYSDUMMY1) AS LOCXTMP0) AS TEMP2

ref: http://stackoverflow.com/questions/6695428/how-to-split-an-ip-address-string-in-db2-sql-for-converting-to-ip-number

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