On Tue, 2003-11-18 at 18:32, Paul DuBois wrote: > Please reply to the list, not to me personally, so that > others can follow this discussion.
that was my intention, sorry, I just used reply from my e-mail client and realized too late that it did not default to the mysql list. > > At 17:05 -0500 11/18/03, Denis Mercier wrote: > >On Tue, 2003-11-18 at 16:40, Paul DuBois wrote: > >> At 16:21 -0500 11/18/03, Denis Mercier wrote: > >> >here's what im trying to do, i have a tar file in a blob field > >> >and i'm trying to retrieve it and pipe it directly into tar > >> >to decompress it, without first writing it to the hard drive, > >> > > >> >here's what i've tried so far, > >> >I create a text file called test1: > >> >use my_db; > >> >select * into dumpfile "/usr/local/test1" from my_table; > >> > > >> >so when i try shell> mysql --pager < test1 | tar x > >> > > >> >the tar file does get written to /usr/local/test1 which is the step i'm > >> >trying to avoid, and nothing seems to get piped to tar? > >> > >> Right, because you've told the SELECT to write its output to > >> /usr/local/test1, not to its standard output. Hence, tar > >> receives nothing. > >> > >> > > >> > > >> >i also tried: > >> >use my_db; > >> >select * from my_table; > >> > > >> >so when i try shell> mysql --pager < test1 | tar x > >> > > >> >the tar file does not get written to /usr/local/test1 but i still dont > >> >get my untared files? write permissions are ok? > >> >what am i missing? > >> > >> Have you verified that the mysql command actually writes any output, for > >> example, with this command: > >> > > > shell> mysql --pager < test1 | wc > >> > >> Do you get any output from tar at all, such as an error message? > >> Maybe the output from mysql isn't suitable. Couple of things to try: > >> > >The output from mysql seems fine because when it does write the value > >of my blob I get a well formatted tar file, > >I'm thinking that maybe tar cannot handle a stream as it's input? > > That may be. In that case, you should invoke tar as > > tar xf - > I have tried tar xf but tar gives me an error, it wants a file specified. I'll keep trying different tactics and share my findings, there must be an answer! > rather than as > > tar x > > -- > Paul DuBois, Senior Technical Writer > Madison, Wisconsin, USA > MySQL AB, www.mysql.com > > Are you MySQL certified? http://www.mysql.com/certification/ > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
