MySQL 8.0: Issues with InnoDB Full-Text Search Returning Unexpected Results
I just started working with I'm having trouble with I'm trying to debug I keep running into I'm encountering unexpected results when using the InnoDB full-text search feature in MySQL 8.0... I've indexed a `TEXT` column in a table called `articles` that contains various articles with different lengths and types of content. Here's the structure of the table: ```sql CREATE TABLE articles ( id INT AUTO_INCREMENT PRIMARY KEY, title VARCHAR(255), content TEXT, FULLTEXT(content) ) ENGINE=InnoDB; ``` After inserting several records, including variations of English texts, I ran the following query to search for articles containing the words 'database' and 'MySQL': ```sql SELECT * FROM articles WHERE MATCH(content) AGAINST('database MySQL'); ``` To my surprise, the query returns a lot of irrelevant results, including articles that don't even mention 'MySQL' at all. I've confirmed that the `FULLTEXT` index was created correctly by running a check: ```sql SHOW INDEX FROM articles; ``` The output shows that the `FULLTEXT` index exists on the `content` column. I've also made sure that the default full-text parser is being used, which should handle the English language well. I tried using different search modes, such as `IN BOOLEAN MODE` and `NATURAL LANGUAGE MODE`, but the results still seem off. For example: ```sql SELECT * FROM articles WHERE MATCH(content) AGAINST('database MySQL' IN BOOLEAN MODE); ``` This doesn't seem to help either. I suspect that it could be related to the stopwords list in MySQL, but from what I understand, 'database' and 'MySQL' should not be treated as stopwords. I even checked the `innodb_ft_server_stopword_table` and confirmed that these words are not in the stopword list. Could there be any other reasons for the unexpected behavior of the full-text search? Is there a way to tune the settings or the queries to get more relevant results? Any ideas what could be causing this? I've been using Sql for about a year now. Thanks for taking the time to read this!