>
>
>
>----Original Message Follows----
>From: "Rodney Broom" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: Re: uploading 200,000 x 5 rows
>Date: Thu, 13 Sep 2001 18:42:22 -0700
>
>Hi Carlos,
>
>I'm glad to help, but I'd like to clarify several things, first.
>
>thanx a lot ;)
>
> > ...with about 200,000 data about books
> > (title, clasif, year, publisher, authors, subjects, etc etc)
>
>So you have a single file with data for multiple tables?
>
>Yeah indeed, imagine an old bibliographical card, well i have a file with
>200,000 consecutive cards.
>
> > After each sequential parsing (one book)
>
>What defines one book? One file, several records from one or more files,
or
>one record from a single file?
>
>I have a file something similar to:
>-------------------------------------------------------
>Classification: QAT67.0
>Title: History of America System key: tyup
>Authors: Broom, Rodney. Proal, Carlos
>Subjects: History, Social Sciences
>...other fields
>
>Classification: QE56.0
>Title: Mysql System key: iuds
>Authors: Broom, Rodney. Dubois, Paul
>Subjects: Computer Science, History
>...other fields
>
>...200,000 records like these
>--------------------------------------------------------
>
>After each parsing (just reading one record) i have a java object
>containing:
> Book information: title, classif, systemkey, etc
> Book's authors: array of [author1,author2]
> Book's subjects: array of [subject1,subject2]
>
> > i upload that info to the database
>
>You "upload"? How is this done, exactly? Do you mean that you run mysql
from
>one machine with the host set for another machine?
>
> when i begin the whole process i open a connection to the DB by java
>using localhost (i work on the same machine).
> > ...but in 5 tables...
>
>So you've split your data into sets that need to get loaded into five
>destination tables, or you upload five sets of data?
>
>the first one, i need to split into five tables.
>
> > (verifying duplication, ids, etc):
>
>Does this mean that you are checking for duplicates before loading into
>MySQL?
>
> yep
> let me explain, i have a kind of do-while statement like these:
>
> open connection to db
> while (still records in the file)
> {
> parse one record
> insert book information into table book (classif, title, year,
>etc)
> for(each author (current book))
> {
> if author currently in db (through a select)
> get authorID
> else
> authorID= insert author into table author (id
>authorname)
> insert into table book_author (authorID, classif) ->
>relationship
> }
>
> ...subjects with similar "for" that authors
> }
> close connection to db
>
>thanx again
>
>
>
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