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: http://www.sai.msu.su/~megera/postgres/fts/doc/fts-parser.html
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Full-Text Search in PostgreSQL: A Gentle Introduction | ||||
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CREATE FUNCTION parse( parser, document TEXT ) RETURNS SETOF tokenout
Parses the given document and returns a series of records, one for each token produced by parsing. Each record includes a tokid giving its type and a token which gives its content.
postgres=# select * from parse('default','123 - a number'); tokid | token -------+-------- 22 | 123 12 | 12 | - 1 | a 12 | 1 | number
CREATE FUNCTION token_type( parser ) RETURNS SETOF tokentype
Returns a table which defines and describes each kind of token the parser may produce as output. For each token type the table gives the tokid which the parser will label each token of that type, the alias which names the token type, and a short description for the user to read.
postgres=# select * from token_type('default'); tokid | alias | description -------+--------------+----------------------------------- 1 | lword | Latin word 2 | nlword | Non-latin word 3 | word | Word 4 | email | Email 5 | url | URL 6 | host | Host 7 | sfloat | Scientific notation 8 | version | VERSION 9 | part_hword | Part of hyphenated word 10 | nlpart_hword | Non-latin part of hyphenated word 11 | lpart_hword | Latin part of hyphenated word 12 | blank | Space symbols 13 | tag | HTML Tag 14 | protocol | Protocol head 15 | hword | Hyphenated word 16 | lhword | Latin hyphenated word 17 | nlhword | Non-latin hyphenated word 18 | uri | URI 19 | file | File or path name 20 | float | Decimal notation 21 | int | Signed integer 22 | uint | Unsigned integer 23 | entity | HTML Entity