53 lines
1.2 KiB
Plaintext
53 lines
1.2 KiB
Plaintext
Example parser
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==============
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This is an example of a custom parser for full text search.
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It recognizes space-delimited words and returns only two token types:
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- 3, word, Word
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- 12, blank, Space symbols
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The token numbers have been chosen to keep compatibility with the default
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ts_headline() function, since we do not want to implement our own version.
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* Configuration
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The parser has no user-configurable parameters.
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* Usage
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1. Compile and install
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2. Load dictionary
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psql mydb < test_parser.sql
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3. Test it
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mydb# SELECT * FROM ts_parse('testparser','That''s my first own parser');
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tokid | token
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-------+--------
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3 | That's
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12 |
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3 | my
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12 |
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3 | first
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12 |
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3 | own
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12 |
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3 | parser
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mydb# SELECT to_tsvector('testcfg','That''s my first own parser');
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to_tsvector
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-------------------------------------------------
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'my':2 'own':4 'first':3 'parser':5 'that''s':1
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mydb# SELECT ts_headline('testcfg','Supernovae stars are the brightest phenomena in galaxies', to_tsquery('testcfg', 'star'));
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headline
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-----------------------------------------------------------------
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Supernovae <b>stars</b> are the brightest phenomena in galaxies
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That's all.
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