The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/9.6/static/textsearch-intro.html Description:
I copied the text in the followed by example: SELECT to_tsvector('fatal error') @@ to_tsquery('fatal <-> error'); but it will always goes in error: ERROR: syntax error in tsquery: "fatal <-> error" SQL state: 42601 I find two ways to solve the problem: 1. remove the space inside the to_tsquery string to obtain 'fatal<->error' 2. use plainto_tsquery instead of to_tsquery.