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Issues with Chr(0) in SQL INSERT script

开发者 https://www.devze.com 2022-12-11 18:16 出处:网络
We currently use the SQL Publishing Wizard to back up our database schemas and data, however we have some database tables with hashed passwords that contain the null character (chr(0)).When SQL Publis

We currently use the SQL Publishing Wizard to back up our database schemas and data, however we have some database tables with hashed passwords that contain the null character (chr(0)). When SQL Publishing Wizard generates the insert data scripts, the null character causes errors when we try and run the resulting SQL - it appears to ignore ALL TEXT after the first instance of this character in a script. We recently tried out RedGate SQL Compare, and found that it has the same issue with this character. I have confirmed it is ascii character code 0 by running the 开发者_JAVA百科ascii() sql function against the offending record.

A sample of the error we are getting is:

Unclosed quotation mark after the character string '??`????{??0???

The fun part is, I can't really paste a sample Insert statement because of course everything that appears after the CHR(0) is being omitted when pasting!


Change the definition of the column to VARBINARY. The data you store in there doesn't seem to be an appropiate VARCHAR to start with.

This will ripple through the code that uses the column as you'll get a byte[] CLR tpe back in the client, and you should change your insert/update code accordingly. But after all, a passowrd hash is a byte[], not a string.

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