Partial matches with postgresql full-text search using texticle on Heroku

Question

Trying to get searching working on Heroku using partial search

The following query generates an SQL error on Heroku, but works correctly in my locally version:

@events.search(params[:search]+":*")

I am using the Heroku shared database service, is this a possible difference in syntax between PostgreSQL versions?

What syntax should I be using to do a partial matching searching against a full-text index in PostgreSQL 8?

Answer 1

Here are the changes in PostgreSQL 9.1 .

Perhaps you could try using string interpolation instead of concatenation.

@events.search("#{params[:search]}:*")

I'm not really sure what the kiss emoticon :* adds to texticle 's functionality. Maybe I need to learn more SQL.

Answer 2

事实证明，PostgreSQL版本8不支持使用：*语法进行部分搜索。

Answer 3

As http://www.postgresql.org/docs/9.0/interactive/textsearch-controls.html#TEXTSEARCH-PARSING-QUERIES says, using ": " is for specify prefix matching. Eg If searching "Australia" with "Aus: " will work but not "ust:*".

So concat OR xxxx LIKE "%yyy%" will works better

Answer 4

您可以将tsearch选项与前缀一起使用：

:tsearch => {:prefix => true}