https://github.com/postgrespro/pg_tsparser

pg_tsparser - parser for text search
https://github.com/postgrespro/pg_tsparser

parser postgresql

Last synced: 2 months ago
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pg_tsparser - parser for text search

• Host: GitHub
• URL: https://github.com/postgrespro/pg_tsparser
• Owner: postgrespro
• License: other
• Created: 2017-03-24T08:28:03.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2024-10-29T13:13:05.000Z (3 months ago)
• Last Synced: 2024-10-29T15:57:48.764Z (3 months ago)
• Topics: parser, postgresql
• Language: C
• Size: 49.8 KB
• Stars: 16
• Watchers: 29
• Forks: 6
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# pg_tsparser - parser for text search

## Introduction

The **pg_tsparser** module is the modified default text search parser from

PostgreSQL 9.6. The differences are:

* **tsparser** gives unbroken words by underscore character

* **tsparser** gives unbroken words with numbers and letters by hyphen character

For example:

```sql

SELECT to_tsvector('english', 'pg_trgm') as def_parser,

       to_tsvector('english_ts', 'pg_trgm')  as new_parser;

   def_parser    |         new_parser

-----------------+-----------------------------

 'pg':1 'trgm':2 | 'pg':2 'pg_trgm':1 'trgm':3

(1 row)

SELECT to_tsvector('english', '123-abc') as def_parser,

       to_tsvector('english_ts', '123-abc')  as new_parser;

   def_parser    |         new_parser

-----------------+-----------------------------

 '123':1 'abc':2 | '123':2 '123-abc':1 'abc':3

(1 row)

SELECT to_tsvector('english', 'rel-3.2-A') as def_parser,

       to_tsvector('english_ts', 'rel-3.2-A')  as new_parser;

    def_parser    |          new_parser

------------------+-------------------------------

 '-3.2':2 'rel':1 | '3.2':3 'rel':2 'rel-3.2-a':1

(1 row)

```

## License

This module available under the [license](LICENSE) similar to

[PostgreSQL](http://www.postgresql.org/about/licence/).

## Installation

Typical installation procedure may look like this:

    $ cd pg_tsparser

    $ sudo make USE_PGXS=1 install

    $ make USE_PGXS=1 installcheck

    $ psql DB -c "CREATE EXTENSION pg_tsparser;"

After this you can create your own text search configuration:

```sql

CREATE TEXT SEARCH CONFIGURATION english_ts (

    PARSER = tsparser

);

COMMENT ON TEXT SEARCH CONFIGURATION english_ts IS 'text search configuration for english language';

ALTER TEXT SEARCH CONFIGURATION english_ts

    ADD MAPPING FOR email, file, float, host, hword_numpart, int,

    numhword, numword, sfloat, uint, url, url_path, version

    WITH simple;

ALTER TEXT SEARCH CONFIGURATION english_ts

    ADD MAPPING FOR asciiword, asciihword, hword_asciipart,

    word, hword, hword_part

    WITH english_stem;

```