Databases
StackOverflow2013
Postsdbo
POMySQL Joins and Full Text search
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POMySQL Joins and Full Text search
    primarykey
    data
    text
    <p>Any full-text, MySQL experts out there?</p> <p>I wrote a question yesterday asking for any suggestions on how to use full-text search with a lot of joins, a bit lazily, I hadn't actually made an attempt.</p> <p>Since then, I've a had a good attempt at mastering it myself, building a few successful test queries, against my full-text fields. If I do NOT use any joins, and query each field individually, the full-text functions work perfectly and relevance/boolean works great with great performance too... but... as soon as I add my joins to run the full query, it runs forever and ever.</p> <p>Can anybody spot anything in my query that might cause this to happen, because as an amateur, I really can't see it!</p> <pre><code>SELECT photos.photoID, photos.headline, photos.dateCreated, MATCH (people.people) AGAINST ('+sarah +harding' IN BOOLEAN MODE) AS Rel1 FROM photos LEFT JOIN ( photoPeople INNER JOIN people ON photoPeople.peopleID = people.PeopleID ) ON photos.photoID = photoPeople.photoID AND MATCH (people.people) AGAINST ('+sarah +harding' IN BOOLEAN MODE) WHERE photos.photoStatus = 'Live' GROUP BY photos.photoID ORDER BY Rel1 </code></pre> <p>This is one of my successful, individual, queries:</p> <pre><code>SELECT photoID, headline, dateCreated, MATCH (caption) AGAINST ('+sarah +harding' IN BOOLEAN MODE) AS Relevance FROM photos WHERE photoStatus = 'Live' AND MATCH (caption) AGAINST ('+sarah +harding' IN BOOLEAN MODE) ORDER BY Relevance </code></pre> <p>This is the DB schema:</p> <pre><code>photos (tbl) photoID INT(11) Primary Auto-Increment headline Long-Text caption Long-Text / FULLTEXT dateCreated DateTime people (tbl) peopleID INT(11) Primary Auto-Increment people VarChar(255) / FULLTEXT photoPeople (tbl) photoID INT(11) peopleID INT(11) keywords (tbl) keywordID INT(11) Primary Auto-Increment keyword VarChar(255) / FULLTEXT photoKeyword (tbl) photoID INT(11) keywordID INT(11) photoContributor (tbl) photoID INT(11) contributorRef VarChar(100) / FULLTEXT </code></pre> <p>And this is my EXPLAIN print out:</p> <pre> id select_type table type possible_keys key key_len ref rows 1 SIMPLE photos ALL NULL NULL NULL NULL 89830 1 SIMPLE photoContributor ALL NULL NULL NULL NULL 149635 1 SIMPLE photoPeople ALL NULL NULL NULL NULL 110606 1 SIMPLE people eq_ref PRIMARY PRIMARY 4 1 1 SIMPLE photoKeyword ALL NULL NULL NULL NULL 699102 1 SIMPLE keywords eq_ref PRIMARY PRIMARY 4 1 </pre> <p>My website visitor should be able to search for: "Brad Pitt Angelina Jolie Dorchester Hotel Sunglasses @MG" - This should find "Brad Pitt" and "Angelina Jolie" from the 'people.people' table and possibly the 'photos.caption' table too. It should also find "Dorchester Hotel" from the 'photos.caption' table, "Sunglasses" from the 'keywords.keyword' table and lastly, it should find "@MG" in 'photoContributor.contributorRef' table.</p> <p>Any help on this would be gratefully received...</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USTheCarver
    1. USTheCarver
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POMySQL Joins and Full Text search
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POMySQL Joins and Full Text search
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POMySQL Joins and Full Text search
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAdd `EXPLAIN SELECT ...` to your question
      singulars
      1. POMySQL Joins and Full Text search
      1. USsanmai
    2. COFor reference, if you are expanding on a question, without actually changing the basic information asked for, then you should just edit the original, rather than starting afresh.
      singulars
      1. POMySQL Joins and Full Text search
      1. USOrbling
    3. COYou need to paste the schema for those tables (the result of `SHOW CREATE TABLE` queries should be fine). Also, to be clear, it seems you are using MyISAM's fulltext indexing?
      singulars
      1. POMySQL Joins and Full Text search
      1. USTehShrike
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload