This is a document for PGroonga 1.X. See PGroonga 2.x document when you're using recent PGroonga.

&@~| operator

Since 1.2.2.

&?| operator is deprecated since 1.2.2. Use &@~| operator instead.

&?> operator is deprecated since 1.2.1. Use &@~| operator instead.

Summary

&@~| operator performs full text search by an array of queries. If one or more queries are matched, the record is matched.

Query's syntax is similar to syntax that is used in Web search engine. For example, you can use OR search by KEYWORD1 OR KEYWORD2 in query.

Syntax

column &@~| queries

column is a column to be searched. It's text type, text[] type or varchar type.

queries is an array of queries for full text search. It's text[] type for text type or text[] type column. It's varchar[] for varchar type column.

Groonga's query syntax is used in query.

The operator returns true when one or more queries in queries are matched against column.

Operator classes

You need to specify one of the following operator classes to use this operator:

Usage

Here are sample schema and data for examples:

CREATE TABLE memos (
  id integer,
  content text
);

CREATE INDEX pgroonga_content_index ON memos
  USING pgroonga (content pgroonga.text_full_text_search_ops_v2);

INSERT INTO memos VALUES (1, 'PostgreSQL is a relational database management system.');
INSERT INTO memos VALUES (2, 'Groonga is a fast full text search engine that supports all languages.');
INSERT INTO memos VALUES (3, 'PGroonga is a PostgreSQL extension that uses Groonga as index.');
INSERT INTO memos VALUES (4, 'There is groonga command.');

You can perform full text search with queries by &@~| operator:

SELECT * FROM memos WHERE content &@~| ARRAY['Groonga engine', 'PostgreSQL -PGroonga'];
--  id |                                content                                 
-- ----+------------------------------------------------------------------------
--   1 | PostgreSQL is a relational database management system.
--   2 | Groonga is a fast full text search engine that supports all languages.
-- (2 rows)

Groonga engine query matches against a record that its id is 2.

PostgreSQL -PGroonga query matches against a record that its id is 1.

See also