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Varchar(500)

Posted on 2014-10-20
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Last Modified: 2016-06-15
Dear Experts,

Please advise me.

Basically, this is a registration form. My Developer has set varchar(500) on the text field.
However, recently we realised that the number of character is more then 500. Hence, is there any way that i can retrieve the "DROP" data/packets ?

Currently, the data is store in Mysql which happens to be on the CPanel...
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Question by:sky guo
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Jim Horn earned 1000 total points
ID: 40392668
>is there any way that i can retrieve the "DROP" data/packets ?
Explain what you mean by "DROP" data/packets.

If rows were instered that had a value in this column greater than 500, then the data was likely truncated at the 500th character, and there is no way to retrieve the 501st character onwards that was truncated.

btw if whatever code that INSERTS data has a SET ANSI_WARNINGS OFF line before it, then any truncation will happen without throwing a message/error, meaning you'd never know when this happens.  Setting SET ANSI_WARNINGS ON would throw the error.   Best practice is to leave it on to insure that all characters are inserted, and give the developer notice if the column is not big enough to handle source data.

>Basically, this is a registration form. My Developer has set varchar(500) on the text field.
I'd question how this data is being stored, but that's an issue for another question.
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by:sky guo
ID: 40394217
So for this case,

are we able to retrieve the files from innodb? or myisam?
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by:Ray Paseur
Ray Paseur earned 1000 total points
ID: 40394268
No, if the data was truncated when it was inserted, it is already lost.  You would need to go back to the original data set and recreate the tables with a longer VARCHAR() value.
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Expert Comment

by:Jim Horn
ID: 40394759
Just to keep the question moving along, please show us the T-SQL code / SSIS package screenshot that inserts data into this column.
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Expert Comment

by:Anthony Perkins
ID: 40395297
I suspect the author has inadvertently included the MS SQL Server topic area.  Since the question does not appear to have anything to do with SQL Server it probably should be dropped.
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