full-text-indexing

问题 I have a table named 'fact' with title column, that should be full text index. Firstly, I add a full text index: ALTER TABLE fact ADD FULLTEXT title_fts (title) So, I insert row: INSERT INTO fact (id, title) VALUES ('1', 'red blue yellow ok green grey ten first wise form'); And then I perform search: select * from fact f where contains (f.title, '"red" or "blue"') When I perform the following query, or any other query with 'contains' statement, I get emtpy result set: I have to use this

问题 I have a table named 'fact' with title column, that should be full text index. Firstly, I add a full text index: ALTER TABLE fact ADD FULLTEXT title_fts (title) So, I insert row: INSERT INTO fact (id, title) VALUES ('1', 'red blue yellow ok green grey ten first wise form'); And then I perform search: select * from fact f where contains (f.title, '"red" or "blue"') When I perform the following query, or any other query with 'contains' statement, I get emtpy result set: I have to use this

问题 I have a full-text indexed table and a column that is full-text indexed which contains a list of ids and some other information. Example: SearchInformation 100, 101, 102, 103, 104, Mike 200, 201, 202, 203, 204, John And my full-text query (a simplified version) is: SELECT searchInformation FROM Table T1 INNER JOIN CONTAINSTABLE(SearchTable, SearchInformation, '"100" OR "110" OR "Mick"') k ON T1.ID = k.[key] Now, this query identifies the correct row due to the "100" value being matched, but

问题 I have a query with a number of test fields something like this: SELECT * FROM some-table WHERE field1 ILIKE "%thing%" OR field2 ILIKE "%thing" OR field3 ILIKE "%thing"; The columns are pretty much all varchar(50) or thereabouts. Now I understand to improve performance I should index the fields upon which the search operates. Should I be considering replacing ILIKE with TSEARCH completely? 回答1: A full text search setup is not identical to a "contains" like query. It stems words etc so you can

问题 In Mysql (Innodb) I have created a FULL-TEXT index. Is there a query I can use to retrieve a list of all words contained in the full-text index? My idea is to use a text field that hold a json dump of a list of TAGS. Than I can use full-text query to retrieve rows matching tags (it works). The problem left is to retrieve a list of indexed tags to implement a suggestion and auto completion tag input field. 回答1: Set innodb_ft_aux_table mysql server variable at runtime to your innodb table

问题 Let's say i have an "articles" table which has the columns: article_text: fulltext indexed author_id: indexed now i want to search for a term that appears in an article that a particular arthor has written. so something like: select * from articles where author_id=54 and match (article_text) against ('foo'); the explain for this query tells me that mysql is only going to use the fulltext index. I believe mysql can only use 1 index, but it sure seems like a wise idea to get all the articles a

问题 A client have a long lived IBM Notes application where someone along the line changed the type of a field from number to text. So, now when we're trying to do an FT search like: [myField] = "1234" receive the error message: "Query is not understandable". If I do: [myField] = 1234 it works but won't return any hits. Even though there's a document where myField = "1234". The field is of type text in the design. I've created a new view for testing, only allowing documents from one form. Deleted

问题 SQL DB2/400 : Is there somebody has tried to work wth FullText. If i can have a sql exemple code, it will be great . I would like, for exemple, to use it with a clob column. Many thanks 回答1: This pulls out all of space delimited words from mylib.myfile[mytext] and puts them into a table with two columns. I limit the word length to 15 cause really when do users type in words longer than 15 chars anyways and I've probably already found a match on the 1st 15 and presented a list to the user. I

问题 I like to sort a BOOLEAN wildcard search by relevance. As BOOLEAN has only a binary score we need to use the NATURAL mode to obtain a weight score. But NATURAL does not support operators so it will not return any results (score = 0): mysql>SELECT topic_id, MATCH(topic_text) AGAINST('tunin') AS score FROM topics_search WHERE MATCH(topic_text) AGAINST('tunin*' IN BOOLEAN MODE) ORDER BY score DESC LIMIT 10 +----------+----------+ | topic_id | score | +----------+----------+ | 2 | 0 | | 6 | 0 | |

问题 I have been searching long and hard for an answer regarding the processes full-text index uses to index the full text catalogs assigned to a document, where the document primary key is included in the indexing. I have not been able to find the MSDN article that describes this in depth. Why can't I use it for searching int-only strings in the full text search columns? SEE HERE: (WELL, I'm a new user so I remade the columns myself since I can't post an image) ID FIRSTNAME LASTNAME ADDRESS