Re: [sqlite] Problem loading extension in Delphi (FTS2)
Hi Ralf Thanks for the tip. I checked it out, and it's a bit complex, but looks very clean. I'll probably update to that component set at a later date. -Henrik 2007/8/10, Ralf Junker <[EMAIL PROTECTED]>: > > Hello Henrik Ræder, > > >I'm trying to load the FTS2 extension in Delphi, using the Aducom > >components. Am really close, but still stuck, and thinking it's a problem > >with the parameter to sqlite3_enable_load_extension(). > > DISQLite3 (http://www.yunqa.de/delphi/sqlite3/) does not expose such > problems. > > Look at the full text search demo project which incorporates both FTS1 and > FTS2 into a single *.exe application, with _no_ DLLs or external files > needed. > > The new customizable tokenizer interface will be demonstrated by a > Unicode-aware Pascal tokenizer with the upcoming version of DISQLite3 as > soon as the FTS vacuum fix is official released. > > Ralf > > > > - > To unsubscribe, send email to [EMAIL PROTECTED] > > ----- > > -- Henrik Ræder Clausen CD-rom editor Komputer for alle Jidoka Development Hougårdsvej 29 8220 Brabrand DenmarkTlf +45 6186 0442
[sqlite] Problem loading extension in Delphi (FTS2)
Hi
I'm trying to load the FTS2 extension in Delphi, using the Aducom
components. Am really close, but still stuck, and thinking it's a problem
with the parameter to sqlite3_enable_load_extension().
In declaration:
procedure sqlite3_enable_load_extension(db: string; onoff: integer);
stdcall; far; external 'sqlite3.dll';
In code:
sqlite3_enable_load_extension(Bladbase.Database, 1);
Result2 := Bladbase.SQLite3_ExecSQL('SELECT load_extension(''libfts2.dll
'');');
I get an exception "Not authorized" on the SQL statement, inferring that
the enable_load_extension() function failed.
This is possibly due to it wanting a real handle to the database, which
the Aducom components don't provide in a visible manner.
Any ideas?
-Henrik
Re: [sqlite] Soft search in database
Hi Martin 2007/3/6, Martin Pfeifle <[EMAIL PROTECTED]>: Unfortunately, the fts module of sqlite does not support "fuzzy text search = google search". Yes, I realize this. I'll have to add some additional logic to achieve this. Looks doable. Such a module should not only support range queries, e.g. give me all strings which have a distance smaller than eps to my query string, but also ranked nearest neighbor queries. We also urgently need such a module, and think about implementing it on our own. I would appreciate if efforts could be synchronized. While it would be cool to work on solving the general case, I'm afraid the time pressure here doesn't really permit me doing anything major in that direction. We have a controlled environment for our searches and will be able to solve the job sufficiently well by simpler means. Good luck! -Henrik
Re: [sqlite] Soft search in database
Hi 2007/3/6, Michael Schlenker <[EMAIL PROTECTED]>: > Now my boss, who has a wonderfully creative mind, asks me to implement a > full-text search function which is not the usual simplistic 'found' / > 'not found', but more Google-style where a graded list of results is > returned. You have come to the right place. Take a closer look at: http://www.sqlite.org/cvstrac/wiki?p=FullTextIndex Thanks a bunch. These are good building blocks for what I want to do. -H
[sqlite] Soft search in database
Hi (First post - hope it's an appropriate place) I've been implementing a database of a few MB of text (indexing magazines) in SQLite, and so far have found it to work really well. Now my boss, who has a wonderfully creative mind, asks me to implement a full-text search function which is not the usual simplistic 'found' / 'not found', but more Google-style where a graded list of results is returned. For example, in a search for "MP3 Player", results with the phrases next to each other would get a high rating, as would records with a high occurance of the keywords. This falls outside the usual scope of SQL, but would still seem a relatively common problem to tackle. Any ideas (pointers) how to tackle this? Best regards Henrik Ræder Clausen CD-rom editor Komputer for alle Jidoka Development Hougårdsvej 29 8220 Brabrand DenmarkTlf +45 2611 5842
