Question

我有一个查询，我想用思考sphinx来运行同样的事情，但我遇到HAVING子句的问题。相关代码如下：

#technology_index.rb
  has taggings.tag_id, :as => :tag_id
  has id, :as => :technology_id

#technology.rb
    search(params[:query],
      with: { tag_id: params[:filter].values.flatten },
      group_by: :technology_id,
      having: "COUNT(`technology_id`)=#{params[:filter].size}"
    )

这会引发以下错误（错误消息中的新行是我的）：

sphinxql: syntax error, unexpected IDENT, expecting '*' near '`technology_id`)=1 LIMIT 0, 20; 
SHOW META' - SELECT *, groupby() AS sphinx_internal_group, id AS sphinx_document_id, 
count(DISTINCT sphinx_document_id) AS sphinx_internal_count 
FROM `technology_core` WHERE MATCH('fibrosis') AND `tag_id` IN (2) 
AND `sphinx_deleted` = 0 GROUP BY `technology_id` HAVING COUNT(`technology_id`)=1 
LIMIT 0, 20; SHOW META

问题在于having:子句，因为如果删除它，至少查询有效。从2.2.1 beta HAVING is supported（使用2.2.6），the same for TS 3.1（使用3.1.2）开始。我无法在文档中找到任何信息about use of HAVING，但如果我尝试having: "COUNT(*)>1"之类的内容，我猜错了，我只是错误地调用了它。将having:与TS一起使用的正确方法是什么？

Answer 1

狮身人面像仍然不支持像having: "COUNT('technology_id')=#{params[:filter].size}"这样的东西无论如何，当我按having: "COUNT(*)=#{params[:filter].size}进行分组时，我的查询与technology_id一起使用。

使用思考狮身人面像来纠正HAVING的语法

1 个答案: