psql支持

psql支持

psql命令行实用程序提供了一个元命令,用于显示有关Greenplum数据库全文搜索配置的信息。

可以使用一组命令在psql中获取有关文本搜索配置对象的信息:

\dF{d,p,t}[+] [PATTERN]

可选 + 生成更多细节。

可选参数PATTERN可以是文本搜索对象的名称,指定schema是可选的。 如果省略PATTERN,则将显示有关所有可见对象的信息。 PATTERN可以是正则表达式,可以为schema和对象名称提供单独的模式。 以下示例说明了这一点:

=> \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(添加 + 以获取更多详细信息)。

=> \dF russian
            List of text search configurations
   Schema   |  Name   |            Description             
------------+---------+------------------------------------
 pg_catalog | russian | configuration for russian language

=> \dF+ russian
Text search configuration "pg_catalog.russian"
Parser: "pg_catalog.default"
      Token      | Dictionaries 
-----------------+--------------
 asciihword      | english_stem
 asciiword       | english_stem
 email           | simple
 file            | simple
 float           | simple
 host            | simple
 hword           | russian_stem
 hword_asciipart | english_stem
 hword_numpart   | simple
 hword_part      | russian_stem
 int             | simple
 numhword        | simple
 numword         | simple
 sfloat          | simple
 uint            | simple
 url             | simple
 url_path        | simple
 version         | simple
 word            | russian_stem
\dFd[+] [PATTERN]

列出文本搜索词典(添加 + 以获取更多详细信息)。

=> \dFd
                            List of text search dictionaries
   Schema   |      Name       |                        Description                        
------------+-----------------+-----------------------------------------------------------
 pg_catalog | danish_stem     | snowball stemmer for danish language
 pg_catalog | dutch_stem      | snowball stemmer for dutch language
 pg_catalog | english_stem    | snowball stemmer for english language
 pg_catalog | finnish_stem    | snowball stemmer for finnish language
 pg_catalog | french_stem     | snowball stemmer for french language
 pg_catalog | german_stem     | snowball stemmer for german language
 pg_catalog | hungarian_stem  | snowball stemmer for hungarian language
 pg_catalog | italian_stem    | snowball stemmer for italian language
 pg_catalog | norwegian_stem  | snowball stemmer for norwegian language
 pg_catalog | portuguese_stem | snowball stemmer for portuguese language
 pg_catalog | romanian_stem   | snowball stemmer for romanian language
 pg_catalog | russian_stem    | snowball stemmer for russian language
 pg_catalog | simple          | simple dictionary: just lower case and check for stopword
 pg_catalog | spanish_stem    | snowball stemmer for spanish language
 pg_catalog | swedish_stem    | snowball stemmer for swedish language
 pg_catalog | turkish_stem    | snowball stemmer for turkish language
\dFp[+] [PATTERN]

列出文本搜索解析器(添加 + 以获取更多详细信息)。

=> \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(添加 + 以获取更多详细信息)。

=> \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