On Jul 25, 2008, at 12:05 PM, Sherief N. Farouk wrote: > I'm having a problem with the last parameter, the function used to > dispose > of the blob. Does sqlite defer actually inserting the blob into the > database > somehow? In other words, will I get into trouble if I do: > > Sqlite3_bind_blob(Statement, 1, BlobData, BlobSize, do_nothing); > Delete [] BlobData; >
Use SQLITE_TRANSIENT. Dan. > ? > > - Sherief > >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:sqlite-users- >> [EMAIL PROTECTED] On Behalf Of Dan >> Sent: Friday, July 25, 2008 12:51 AM >> To: General Discussion of SQLite Database >> Subject: Re: [sqlite] Hard time with blobs >> >> >> On Jul 25, 2008, at 10:35 AM, Sherief N. Farouk wrote: >> >>> I want to use blobs to store binary objects in the database, but >>> I'm having >>> a hard time understanding how they work. First of all, I don't see >>> a way to >>> set a blob's size, and sqlite3_blob_write doesn't increase the size >>> of the >>> blob, which is putting me in a weird catch-22 situation. >>> >>> What's the best solution for storing a bunch of binary objects, >>> given the >>> two alternatives: They may be immutable (write once, read many), or >>> mutable >>> (write many, possibly overwriting regions or appending, write many)? >> >> You can work with blobs without using the sqlite3_blob_XXX() APIs. >> Insert >> blobs by binding them with sqlite3_bind_blob(), retrieve them using >> sqlite3_column_blob(). >> >> Sometimes it is better to use the sqlite3_blob_XXX() APIs because >> they >> allow sqlite to work with large blobs without creating a copy of the >> blob in memory. To create a large zeroed blob in the database, use >> either sqlite3_bind_zeroblob() or the "zeroblob" SQL function. Then >> populate it using sqlite3_blob_XXX() after it has been inserted. >> >> Dan. >> >> _______________________________________________ >> sqlite-users mailing list >> sqlite-users@sqlite.org >> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
