143 lines
2.9 KiB
Plaintext
143 lines
2.9 KiB
Plaintext
CREATE EXTENSION dict_xsyn;
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-- default configuration - match first word and return it among with all synonyms
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=true, MATCHORIG=true, KEEPSYNONYMS=true, MATCHSYNONYMS=false);
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--lexize
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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--------------------------
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{supernova,sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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-----------
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- the same, but return only synonyms
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=false, MATCHORIG=true, KEEPSYNONYMS=true, MATCHSYNONYMS=false);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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----------------
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{sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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-----------
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- match any word and return all words
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=true, MATCHORIG=true, KEEPSYNONYMS=true, MATCHSYNONYMS=true);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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--------------------------
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{supernova,sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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--------------------------
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{supernova,sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- match any word and return all words except first one
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=false, MATCHORIG=true, KEEPSYNONYMS=true, MATCHSYNONYMS=true);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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----------------
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{sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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----------------
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{sn,sne,1987a}
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- match any synonym but not first word, and return first word instead
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=true, MATCHORIG=false, KEEPSYNONYMS=false, MATCHSYNONYMS=true);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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-----------
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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-------------
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{supernova}
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- do not match or return anything
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=false, MATCHORIG=false, KEEPSYNONYMS=false, MATCHSYNONYMS=false);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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-----------
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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-----------
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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-- match any word but return nothing
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ALTER TEXT SEARCH DICTIONARY xsyn (RULES='xsyn_sample', KEEPORIG=false, MATCHORIG=true, KEEPSYNONYMS=false, MATCHSYNONYMS=true);
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SELECT ts_lexize('xsyn', 'supernova');
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ts_lexize
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-----------
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{}
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(1 row)
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SELECT ts_lexize('xsyn', 'sn');
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ts_lexize
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-----------
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{}
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(1 row)
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SELECT ts_lexize('xsyn', 'grb');
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ts_lexize
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-----------
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(1 row)
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