Question

postgres文档here将numhword解析器解释为匹配连字符，字母和数字的解析器。他们为此提供的示例是postgres-beta1，这很好地匹配。但是，postgres-9-beta1之类的某些东西不匹配，我似乎找不到可以使用它的默认解析器。 SQL下面。

我最好选择只在空格上解析的东西吗？有没有这样的默认解析器？（似乎test_parser不再附带9.5 ......）

我想将字母数字标记为连字符。我暂时坚持使用正则表达式，还是有一种直接的方法来创建客户解析器（不会降低到C）？

CREATE TEXT SEARCH DICTIONARY simple_nostem_no_stop (TEMPLATE = pg_catalog.simple);
CREATE TEXT SEARCH CONFIGURATION test_id_search ( COPY = pg_catalog.simple );

alter text search configuration test_id_search
drop mapping for asciihword, asciiword, email, file, float, host, hword, hword_asciipart, hword_numpart, hword_part, int, numhword, numword, sfloat, uint, url, url_path, version, word  ;

ALTER TEXT SEARCH CONFIGURATION test_id_search
ALTER MAPPING FOR numhword WITH simple_nostem_no_stop;

\dF+ test_id_search

Text search configuration "public.test_id_search"
Parser: "pg_catalog.default"
Token    |     Dictionaries
---------+-----------------------
numhword | simple_nostem_no_stop

/* This works as i hoped, per the docs:  */
    test_db=# select to_tsvector('test_id_search', ' postgresql-beta1 ') ;
    to_tsvector
    ----------------------
    'postgresql-beta1':1
    (1 row)

/* This doesn't seem to work? */
    test_db=# select to_tsvector('test_id_search', ' postgresql-9-beta1 ') ;
    to_tsvector
    -------------

    (1 row)

postgres文本搜索 - numhword匹配和订单

0 个答案: