Special

Introducing the “Welcome to Xojo” Bundle!

New to Xojo and looking for guidance? We've put together a terrific bundle to welcome you! Xojo Bundle

This bundle includes six back issues of the magazine -- all of year 14 in printed book and digital formats -- plus a one-year subscription so you'll be learning all about Xojo for the next year. It's the perfect way to get started programming with Xojo. And you save as much as $35 over the non-bundle price!

This offer is only available for a limited time as supplies are limited, so hurry today and order this special bundle before the offer goes away!

Article Preview


Buy Now

Issue 11.4 ('Blackjack')
Instant purchase and download via GumRoad!

COLUMN

Searching SQLite

Using SQLite's powerful full-text-search feature

Issue: 11.4 (July/August 2013)
Author: Seth Verrinder
Author Bio: Seth is a consultant who uses Real Studio every day in his job at BKeeney Software, Inc.
Article Description: No description available.
Article Length (in bytes): 5,516
Starting Page Number: 66
Article Number: 11408
Related Web Link(s):

http://www.sqlite.org/fts3.html

Excerpt of article text...

A couple of issues back I talked about using REALSQLDatabase (note that this has been replaced by SQLiteDatabase in Xojo) as a file format for applications. In this issue I'm going to look at one of the less known but very powerful features of SQLite called Full Text Search.

One project that I worked on had a library of thousands of documents where most of them contained more than ten pages of text. We needed to be able to search for a words or phrases and get a list of all the documents that contained them. The first attempt scanned through every file each time the user did a search, which worked but it could take minutes on a large library. Using SQLite's full text search we were able to perform the same search in a fraction of a second.

This article is a brief overview of how full text search works and an example of how to set it up using REALSQLDatabase.

How it Works

The basic idea of full text search is that it creates an index that let's it efficiently perform searches. When you add a document, SQLite breaks it up into words and for each word it stores a list of documents that contain that word. Then, when you search for a word, it can look up the word very quickly in it's index and find the list of documents that contain it.

...End of Excerpt. Please purchase the magazine to read the full article.