关于文本搜索配置对象的信息可以在ltsql中使用一组命令获得:
\dF{d,p,t}[+] [PATTERN]
可选的+
能产生更多细节。
可选参数PATTERN
可以是一个文本搜索对象的名称,可以是模式限定的。如果PATTERN
被忽略,则所有可见对象的信息都将被显示。PATTERN
可以是一个正则表达式并且可以为模式和对象名称提供独立的模式。下面的例子展示了这些特性:
=> \dF *fulltext* List of text search configurations Schema | Name | Description --------+--------------+------------- public | fulltext_cfg |
=> \dF *.fulltext* List of text search configurations Schema | Name | Description ----------+---------------------------- fulltext | fulltext_cfg | public | fulltext_cfg |
可用的命令是:
\dF[+] [PATTERN]
列出文本搜索配置(加上+
得到更多细节)。
=> \dF english List of text search configurations Schema | Name | Description ------------+---------+------------------------------------ pg_catalog | english | configuration for english language => \dF+ english Text search configuration "pg_catalog.english" Parser: "pg_catalog.default" Token | Dictionaries -----------------+-------------- asciihword | english_stem asciiword | english_stem email | simple file | simple float | simple host | simple hword | english_stem hword_asciipart | english_stem hword_numpart | simple hword_part | english_stem int | simple numhword | simple numword | simple sfloat | simple uint | simple url | simple url_path | simple version | simple word | english_stem
\dFd[+] [PATTERN]
列出文本搜索词典(加上+
得到更多细节)。
=> \dFd List of text search dictionaries Schema | Name | Description ------------+--------------+----------------------------------------------------------- pg_catalog | english_stem | snowball stemmer for english language pg_catalog | simple | simple dictionary: just lower case and check for stopword
\dFp[+] [PATTERN]
列出文本搜索解析器(加上+
得到更多细节)。
=> \dFp List of text search parsers Schema | Name | Description ------------+---------+--------------------- pg_catalog | default | default word parser => \dFp+ Text search parser "pg_catalog.default" Method | Function | Description -----------------+----------------+------------- Start parse | prsd_start | Get next token | prsd_nexttoken | End parse | prsd_end | Get headline | prsd_headline | Get token types | prsd_lextype | Token types for parser "pg_catalog.default" Token name | Description -----------------+------------------------------------------ asciihword | Hyphenated word, all ASCII asciiword | Word, all ASCII blank | Space symbols email | Email address entity | XML entity file | File or path name float | Decimal notation host | Host hword | Hyphenated word, all letters hword_asciipart | Hyphenated word part, all ASCII hword_numpart | Hyphenated word part, letters and digits hword_part | Hyphenated word part, all letters int | Signed integer numhword | Hyphenated word, letters and digits numword | Word, letters and digits protocol | Protocol head sfloat | Scientific notation tag | XML tag uint | Unsigned integer url | URL url_path | URL path version | Version number word | Word, all letters (23 rows)
\dFt[+] [PATTERN]
列出文本搜索模板(加上+
得到更多细节)。
=> \dFt List of text search templates Schema | Name | Description ------------+-----------+----------------------------------------------------------- pg_catalog | ispell | ispell dictionary pg_catalog | simple | simple dictionary: just lower case and check for stopword pg_catalog | snowball | snowball stemmer pg_catalog | synonym | synonym dictionary: replace word by its synonym pg_catalog | thesaurus | thesaurus dictionary: phrase by phrase substitution