Kouhei Sutou
null+****@clear*****
Wed Jun 7 15:53:00 JST 2017
Kouhei Sutou 2017-06-07 15:53:00 +0900 (Wed, 07 Jun 2017) New Revision: eec9603c56bfcda1b26b581047955d68e57ab86f https://github.com/pgroonga/pgroonga.github.io/commit/eec9603c56bfcda1b26b581047955d68e57ab86f Message: prefix-rk-search-in-v2: add more information Modified files: reference/operators/prefix-rk-search-in-v2.md reference/operators/prefix-rk-search-v2.md reference/operators/prefix-search-in-v2.md reference/operators/prefix-search-v2.md Modified: reference/operators/prefix-rk-search-in-v2.md (+58 -40) =================================================================== --- reference/operators/prefix-rk-search-in-v2.md 2017-06-07 15:42:41 +0900 (fa2478b) +++ reference/operators/prefix-rk-search-in-v2.md 2017-06-07 15:53:00 +0900 (e71076c) @@ -1,17 +1,15 @@ --- -title: "&^~> operator" +title: "&^~| operator" upper_level: ../ --- -# `&^~>` operator +# `&^~|` operator -Since 1.0.9. +Since 1.2.1. ## Summary -This operator uses v2 operator class. It doesn't provide backward compatibility until PGroonga 2.0.0. Use it carefully. - -`&^~>` operator performs [prefix RK search](http://groonga.org/docs/reference/operations/prefix_rk_search.html). R is for [Romaji](https://en.wikipedia.org/wiki/Romanization_of_Japanese). K is for [Kana](https://en.wikipedia.org/wiki/Kana). +`&^~|` operator performs [prefix RK search][groonga-prefix-rk-search] by an array of prefixes. R is for [Romaji][wikipedia-romaji]. K is for [Kana][wikipedia-kana]. If one ore more prefixes are matched, the record is matched. Prefix RK search is useful for Japanese. @@ -20,16 +18,24 @@ Prefix RK search is useful for implementing input completion. ## Syntax ```sql -column &^~> prefix +column &^~| prefix ``` -`column` is a column to be searched. It's `text[]` type. +`column` is a column to be searched. It's `text` type or `text[]` type. -`prefix` is a prefix to be found. It's `text` type. +`prefix` is an array of prefixes to be found. It's `text[]` type. `column` values must be in Katakana. `prefix` must be in Romaji, Hiragana or Katakana. -The operator returns `true` when one of the `column` values start with `prefix`. +The operator returns `true` when the `column` value starts with one or more prefixes in `prefixes`. + +## Operator classes + +You need to specify one of the following operator classes to use this operator: + + * `pgroonga.text_term_search_ops_v2`: For `text`. + + * `pgroonga.text_array_term_search_ops_v2`: For `text[]`. ## Usage @@ -38,61 +44,73 @@ Here are sample schema and data for examples: ```sql CREATE TABLE tags ( name text PRIMARY KEY, - readings text[] + reading text ); CREATE INDEX pgroonga_tags_index ON tags - USING pgroonga (readings pgroonga.text_array_term_search_ops_v2); + USING pgroonga (reading pgroonga.text_term_search_ops_v2); ``` ```sql INSERT INTO tags VALUES ('PostgreSQL', - ARRAY['ポストグレスキューエル', 'ポスグレ', 'ピージー']); -INSERT INTO tags VALUES ('Groonga', ARRAY['グルンガ']); -INSERT INTO tags VALUES ('PGroonga', ARRAY['ピージールンガ']); -INSERT INTO tags VALUES ('pglogical', ARRAY['ピージーロジカル']); + 'ポストグレスキューエル'); +INSERT INTO tags VALUES ('Groonga', 'グルンガ'); +INSERT INTO tags VALUES ('PGroonga', 'ピージールンガ'); +INSERT INTO tags VALUES ('pglogical', 'ピージーロジカル'); ``` -You can perform prefix RK search with prefix in Romaji by `&^~>` operator: +You can perform prefix RK search with prefixes in Romaji by `&^~|` operator: ```sql -SELECT * FROM tags WHERE readings &^~> 'pi-ji-'; --- name | readings --- ------------+-------------------------------------------- --- PostgreSQL | {ポストグレスキューエル,ポスグレ,ピージー} --- PGroonga | {ピージールンガ} --- pglogical | {ピージーロジカル} +SELECT * FROM tags WHERE reading &^~| ARRAY['pi-ji-', 'posu']; +-- name | reading +-- ------------+------------------------ +-- PostgreSQL | ポストグレスキューエル +-- PGroonga | ピージールンガ +-- pglogical | ピージーロジカル -- (3 rows) ``` -You can also use Hiragana for prefix: +You can also use Hiragana for prefixes: ```sql -SELECT * FROM tags WHERE readings &^~> 'ぴーじー'; --- name | readings --- ------------+-------------------------------------------- --- PostgreSQL | {ポストグレスキューエル,ポスグレ,ピージー} --- PGroonga | {ピージールンガ} --- pglogical | {ピージーロジカル} +SELECT * FROM tags WHERE reading &^~| ARRAY['ぴーじー', 'ぽす']; +-- name | reading +-- ------------+------------------------ +-- PostgreSQL | ポストグレスキューエル +-- PGroonga | ピージールンガ +-- pglogical | ピージーロジカル -- (3 rows) ``` -You can also use Katakana for prefix: +You can also use Katakana for prefixes: ```sql -SELECT * FROM tags WHERE readings &^~> 'ピージー'; --- name | readings --- ------------+-------------------------------------------- --- PostgreSQL | {ポストグレスキューエル,ポスグレ,ピージー} --- PGroonga | {ピージールンガ} --- pglogical | {ピージーロジカル} +SELECT * FROM tags WHERE reading &^~| ARRAY['ピージー', 'ポス']; +-- name | reading +-- ------------+------------------------ +-- PostgreSQL | ポストグレスキューエル +-- PGroonga | ピージールンガ +-- pglogical | ピージーロジカル -- (3 rows) ``` ## See also - * [`&^` operator](prefix-search-v2.html) + * [`&^` operator][prefix-search-v2] + + * [`&^|` operator][prefix-search-in-v2] + + * [`&^~` operator][prefix-rk-search-v2] + +[groonga-prefix-rk-search]:http://groonga.org/docs/reference/operations/prefix_rk_search.html + +[wikipedia-romaji]:https://en.wikipedia.org/wiki/Romanization_of_Japanese + +[wikipedia-kana]:https://en.wikipedia.org/wiki/Kana + +[prefix-search-v2]:prefix-search-v2.html - * [`&^>` operator](prefix-search-contain-v2.html) +[prefix-search-in-v2]:prefix-search-in-v2.html - * [`&^~` operator](prefix-rk-search-v2.html) +[prefix-rk-search-v2]:prefix-rk-search-v2.html Modified: reference/operators/prefix-rk-search-v2.md (+3 -3) =================================================================== --- reference/operators/prefix-rk-search-v2.md 2017-06-07 15:42:41 +0900 (887e7b7) +++ reference/operators/prefix-rk-search-v2.md 2017-06-07 15:53:00 +0900 (a0866a3) @@ -11,7 +11,7 @@ Since 1.2.1. `&^~>` operator for `text[]` is deprecated since 1.2.1. Use `&^~` operator instead. -`&^~` operator performs [prefix RK search][groonga-prefik-rk-search]. R is for [Romaji][wikipedia-romaji]. K is for [Kana][wikipedia-kana]. +`&^~` operator performs [prefix RK search][groonga-prefix-rk-search]. R is for [Romaji][wikipedia-romaji]. K is for [Kana][wikipedia-kana]. Prefix RK search is useful for Japanese. @@ -35,9 +35,9 @@ The operator returns `true` when the `column` value starts with `prefix`. You need to specify one of the following operator classes to use this operator: - * `pgroonga.text_term_search_ops`: For `text`. + * `pgroonga.text_term_search_ops_v2`: For `text`. - * `pgroonga.text_array_term_search_ops`: For `text[]`. + * `pgroonga.text_array_term_search_ops_v2`: For `text[]`. ## Usage Modified: reference/operators/prefix-search-in-v2.md (+2 -2) =================================================================== --- reference/operators/prefix-search-in-v2.md 2017-06-07 15:42:41 +0900 (1c9e01f) +++ reference/operators/prefix-search-in-v2.md 2017-06-07 15:53:00 +0900 (6b5d88a) @@ -29,9 +29,9 @@ The operator returns `true` when the `column` value starts with one or more pref You need to specify one of the following operator classes to use this operator: - * `pgroonga.text_term_search_ops`: For `text`. + * `pgroonga.text_term_search_ops_v2`: For `text`. - * `pgroonga.text_array_term_search_ops`: For `text[]`. + * `pgroonga.text_array_term_search_ops_v2`: For `text[]`. ## Usage Modified: reference/operators/prefix-search-v2.md (+2 -2) =================================================================== --- reference/operators/prefix-search-v2.md 2017-06-07 15:42:41 +0900 (869a8e1) +++ reference/operators/prefix-search-v2.md 2017-06-07 15:53:00 +0900 (8140a95) @@ -31,9 +31,9 @@ The operator returns `true` when the `column` value starts with `prefix`. You need to specify one of the following operator classes to use this operator: - * `pgroonga.text_term_search_ops`: For `text`. + * `pgroonga.text_term_search_ops_v2`: For `text`. - * `pgroonga.text_array_term_search_ops`: For `text[]`. + * `pgroonga.text_array_term_search_ops_v2`: For `text[]`. ## Usage -------------- next part -------------- HTML����������������������������...Download