Mysql fulltext index search returning weird result - mysql

Question

I have ingredient table. I want all those recipes which have certain ingredients. Below is my table structure.
Table(ingredient) - Applied fulltext index on ingredient column.
------------------------------------------------------
ingredientID rcteID ingredient
310 1 Mint Leaves
311 1 Corriender Leaves
312 1 GreenChili
I am trying to fetch above record below fulltext search query but not getting that record.
SELECT `Ingredient`.`ingredientID` , `Ingredient`.`rcteID`
FROM `ingredient` AS `Ingredient`
WHERE MATCH (`Ingredient`.`ingredient`)
AGAINST ('+Mint Leaves +Corriender Leaves +Greenchili' IN BOOLEAN MODE)
AND `Ingredient`.`rcteID`
IN ( 1 )
GROUP BY `Ingredient`.`rcteID`
Why above query is not working for above record?
When I tried below query it worked. just changed searching text.
SELECT `Ingredient`.`ingredientID` , `Ingredient`.`rcteID`
FROM `ingredient` AS `Ingredient`
WHERE MATCH (`Ingredient`.`ingredient`)
AGAINST ('+Greenchili +Mint Leaves +Corriender Leaves' IN BOOLEAN MODE)
AND `Ingredient`.`rcteID`
IN ( 1 )
GROUP BY `Ingredient`.`rcteID`
OUTPUT
--------------------
ingredientID rcteID
311 1
Don't understand what's going on. Why first query not returning any result and below query returning result?

Answer 1

This is not an real explanation, but you can run this query to see the score.
SELECT MATCH (`Ingredient`.`ingredient`)
AGAINST ('+Mint Leaves +Corriender Leaves +Greenchili' IN BOOLEAN MODE)
FROM `ingredient` AS `Ingredient`
WHERE MATCH (`Ingredient`.`ingredient`)
AGAINST ('+Mint Leaves +Corriender Leaves +Greenchili' IN BOOLEAN MODE)
I believe that your query mean: find ingredients that each of them contains ALL of these Mint Leaves, Corriender Leaves, Greenchili, and which is not found in your data set. MySQL cannot find any row that contains all of these keywords above.
However if you but your query into brackets, it is a different story:
SELECT `Ingredient`.`ingredientID` , `Ingredient`.`rcteID`
FROM `ingredient` AS `Ingredient`
WHERE MATCH (`Ingredient`.`ingredient`)
AGAINST ('(+Greenchili) (+Mint Leaves) (+Corriender Leaves)' IN BOOLEAN MODE)
AND `Ingredient`.`rcteID`
IN ( 1 )
GROUP BY `Ingredient`.`rcteID`
This query can be translated into: Fetch me ingredients which contains AT LEAST one of these:Mint Leaves, Corriender Leaves, Greenchili and group them by rcteID.
UPDATED:
SELECT t1.rcteID FROM `ingredient` t1
JOIN `ingredient` t2 ON t2.rcteID = t1.rcteID
JOIN `ingredient` t3 ON t3.rcteID = t2.rcteID
WHERE
MATCH (t1.`ingredient`) AGAINST ('+Greenchili' IN BOOLEAN MODE)
AND
MATCH (t2.`ingredient`) AGAINST ('+Mint Leaves' IN BOOLEAN MODE)
AND
MATCH (t3.`ingredient`) AGAINST ('+Corriender Leaves' IN BOOLEAN MODE)
AND t1.`rcteID` IN ( 1 )
GROUP BY t1.`rcteID`
I think this query will work for you. Basically, it share the same idea with you but it looks for 3 keywords separately and only get the rcteID which contains 3 ingredients.