Coldfusion / MySQL question

Cf 10 / MySQL 5.6


In my database table is a field "DaysOnMarket"  I need to populate that field by subtracting the "ListDate" of the property (which I get in a RETS feed and is in the table) from today's date. Which I can calculate below:

--------------------------
<cfset todayDate = DateFormat(Now(),"yyyy-mm-dd")>

<cfset DaysOnMarket = #TodayDate#-#ListDate#>

#DaysOnMarket#

--------------------------

What I want is to be able to update the "DaysOnMarket" field for all the records in my table.

Whats the best way to accomplish this?  I'm using LOAD DATA INFILE to get .txt file data into the table.

Can it be done at the same time the records are loaded into the database using LOAD DATA INFILE using SET? or should it be done directly after the records are loaded?

Code sample appreciated.

Thanks!
Bang-O-MaticAsked:
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_agx_Commented:
Don't have time to test it right now, but two possibilities come to mind:

1) Add an INERT TRIGGER to the table. The trigger would update the "DaysOnMarket" value whenever a record is inserted.  The advantage is it's a one time operation, and it would apply to any INSERT into that table - individual inserts or via LOAD DATA.
2) LOAD DATA offers a `SET` clause which allows you to modify inserted values at the time of insert.  Looking at the docs you'd probably use something along these lines:

...
LOAD DATA INFILE 'file.txt'
  INTO TABLE t1
  (ListDate, ... other columns )
  SET DaysOnMarket= DATEDIFF(CURRENT_DATE, ListDate)
...

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Bang-O-MaticAuthor Commented:
Exactly what I was looking for!
SET DaysOnMarket= DATEDIFF(CURRENT_DATE, ListDate)
Works perfect!

Thanks for the help _agx_!
Bang-O-MaticAuthor Commented:
Perfect solution! thanks _agx_!
_agx_Commented:
Cool. Glad I could help!
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