On Thu, Feb 11, 2010 at 6:56 PM, Richard Huxton <dev@archonet.com> wrote:
On 05/02/10 15:48, Moe wrote:
I am trying to figure out how I can introduce full text search "tips"... tips meaning, like if you start typing Mer .. then a box with a couple of words underneath comes up, with *Mercedes, Mercury *and so on :P
I am thinking that the word suggestions needs to come from the already existing tsearch2 index. Words that are frequent in the index could be ranked higher as a search tip.
This could get expensive if you have a large index.
You might want to summarize down to a separate (word,frequency) table. Particularly if you don't want stemming to interfere with your suggestions.
Stemming is ok. That's fine.
How would this normally be implemented? Should I go through my text word by word myself, or the already existing index and copy over to a new table? Not sure how this would be managable. Every change to something would require a word count down, and then a word up after.
See the manuals (full text search) for details on prefix searches - introduced in 8.4 if you really want to go the tsearch route.