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926bbab448
remove transactions use create or replace function make formatting consistent set search patch on first line Add documentation on modifying *.sql to set the search patch, and mention that major upgrades should still run the installation scripts. Some of these issues were spotted by Tom today. |
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| .. | ||
| expected | ||
| sql | ||
| Makefile | ||
| README.test_parser | ||
| test_parser.c | ||
| test_parser.sql.in | ||
| uninstall_test_parser.sql | ||
Example parser
==============
This is an example of a custom parser for full text search.
It recognizes space-delimited words and returns only two token types:
- 3, word, Word
- 12, blank, Space symbols
The token numbers have been chosen to keep compatibility with the default
ts_headline() function, since we do not want to implement our own version.
* Configuration
The parser has no user-configurable parameters.
* Usage
1. Compile and install
2. Load dictionary
psql mydb < test_parser.sql
3. Test it
mydb# SELECT * FROM ts_parse('testparser','That''s my first own parser');
tokid | token
-------+--------
3 | That's
12 |
3 | my
12 |
3 | first
12 |
3 | own
12 |
3 | parser
mydb# SELECT to_tsvector('testcfg','That''s my first own parser');
to_tsvector
-------------------------------------------------
'my':2 'own':4 'first':3 'parser':5 'that''s':1
mydb# SELECT ts_headline('testcfg','Supernovae stars are the brightest phenomena in galaxies', to_tsquery('testcfg', 'star'));
headline
-----------------------------------------------------------------
Supernovae <b>stars</b> are the brightest phenomena in galaxies
That's all.