thinking through parsing multi-line database commands with cr in the data

Dr. Hawkins dochawk at gmail.com
Sat May 25 13:49:52 EDT 2013


I'm still kind of thinking aloud on this, and don't want to shoot my foot
clean off.

I'm developing with the ipad version in mind for the future, too.

My preferred db will be postgres, with mysql as an alternate (if I don't
keep tripping across it's "whoops!"s).  However, for performance reasons
(as well as the demo & single use versions working without having to
install a db server!), it will be necessary to support sqlite as well,
keeping the local db.

I'm writting a wrapper to take multiple commands, and possibly an
update/sync command, which could be to the table in the same or another db.

If I'm feeding postgres/mysql, I can have a begin/update this/insert
that/commit sequence, no problem.

SQLite, though, seems to have at least sporadic issues with multi-line
command blocks, and may need them sent one at a time.

What I'm scratching my brain for is "unpeeling" a multi-command block where
the data will usually include cr.

All I'm coming up with so far is putting a line in, and testing for things
like "INSERT INTO" "UPDATE" and any other command I use on the next line to
see if it is indeed a new line, and otherwise appending to the current
working line.

But this will trip up on, for example, an address like:

   Joe Scmoe, President
   Update your mac!
   123 E. Main St.


Or am I (hopefully) missing an obvious solution (other than dump sqlite :)


-- 
Dr. Richard E. Hawkins, Esq.
(702) 508-8462



More information about the Use-livecode mailing list