Question

我有成分表。我想要所有那些含有某些成分的食谱。下面是我的表格结构。

Table(ingredient) - Applied fulltext index on ingredient column.
------------------------------------------------------
 ingredientID   rcteID  ingredient  
    310           1     Mint Leaves     
    311           1     Corriender Leaves   
    312           1     GreenChili

我正在尝试在全文搜索查询下方获取以上记录，但未获取该记录。

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`

为什么上述查询不能用于上述记录？

当我尝试以下查询时，它有效。刚刚更改了搜索文字。

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

不明白发生了什么。为什么第一个查询不返回任何结果，而下面的查询返回结果？

Answer 1

这不是一个真正的解释，但您可以运行此查询以查看分数。

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)

我相信您的查询意味着：找到每个都包含所有的 Mint Leaves，Corriender Leaves，Greenchili 的成分，以及您的数据中找不到的成分组。 MySQL无法找到包含上述所有关键字的任何行。

但是，如果您将查询放入括号中，则会有不同的故事：

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`

此查询可以翻译成：获取包含至少其中一个的成分： Mint Leaves，Corriender Leaves，Greenchili 并通过rcteID对它们进行分组。

更新：

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`

我认为此查询对您有用。基本上，它与你有相同的想法，但它分别查找3个关键字，只获得包含3个成分的rcteID。

Mysql全文索引搜索返回奇怪的结果

1 个答案: