MySQL update BLOB

rubyonrails-talk
1

Hi I am trying to update a blob column from Ruby script into MySQL DB. The script is running on PC and DB on Linux host. The problem I see is that only 255 bytes of data being stored , is there any way to deal with that problem ?

myconnect = Mysql::new(host, user, "", db) f = File.new(file_name,'rb')

data = Mysql.escape_string(f.sysread(f.size))

update_sql = "update SHARE set COMPANY_LOGO = '"+ data + "' WHERE ID = 8982167534873685924";

stmt = myconnect.prepare(update_sql) stmt.execute()

stmt.close myconnect.commit myconnect.close

I also tried to leave a - '?' mark and than fill it with data, that one is not storing anything.

2

Hi I am trying to update a blob column from Ruby script into MySQL DB. The script is running on PC and DB on Linux host. The problem I see is that only 255 bytes of data being stored , is there any way to deal with that problem ?

What's the type of the column?

Fred

3

tinyblob

4

Please quote when replying.

Roman Mandeleil wrote in post #970391:

tinyblob

Well, there's your problem -- a MySQL TINYBLOB only holds 255 bytes of data!

Best,

5

Yep I got it. So much trouble with the script so I missed the obvious. But, I still don't understand why the place holder for the update statement doesn't work: I mean that syntax:

update_sql = "update SHARE set COMPANY_LOGO = ? WHERE ID = 8982167534873685924";

stmt = myconnect.prepare(update_sql) stmt.execute(data)