我尝试为报告创建具有中间结果的表格。 我正在做的是:
ActiveRecord::Base.connection.execute(sql_query)
sql_query是:
SET SQL_SAFE_UPDATES=0;
DROP TABLE IF EXISTS _by_people_daily;
CREATE TEMPORARY TABLE _by_people_daily
AS
SELECT #{date_int} AS date_int,
memberships.user_id AS user_id,
ci.community_id,
ci.content_id,
contents.composite_type AS content_type,
COUNT(views.id) AS views,
COUNT(comments.id) AS comments,
COUNT(shares.id) AS shares,
COUNT(likes.id) AS likes,
COUNT(uploads.id) AS uploads
FROM community_items AS ci
JOIN memberships ON memberships.community_id = ci.community_id
JOIN contents ON ci.content_id = contents.id
JOIN (SELECT '#{day_begin}' as start_date, '#{day_end}' as end_date) AS dates
LEFT JOIN contents AS uploads
ON uploads.id = ci.content_id
AND uploads.user_id = memberships.user_id
AND uploads.created_at BETWEEN dates.start_date AND dates.end_date
LEFT JOIN comments
ON comments.content_id = ci.content_id
AND comments.user_id = memberships.user_id
AND comments.created_at BETWEEN dates.start_date AND dates.end_date
LEFT JOIN shares
ON shares.content_id = ci.content_id
AND shares.user_id = memberships.user_id
AND shares.created_at BETWEEN dates.start_date AND dates.end_date
LEFT JOIN likes
ON likes.content_id = ci.content_id
AND likes.user_id = memberships.user_id
AND likes.created_at BETWEEN dates.start_date AND dates.end_date
LEFT JOIN views
ON views.viewable_id = ci.content_id
AND views.viewable_type = 'Content'
AND views.user_id = memberships.user_id
AND views.created_at BETWEEN dates.start_date AND dates.end_date
WHERE COALESCE(views.id, comments.id, shares.id, likes.id, uploads.id ) IS NOT NULL
#{ " AND users.company_id = #{@company.id} " if @company }
GROUP BY memberships.user_id, ci.community_id, ci.content_id, contents.composite_type ;
DELETE FROM intermediate_by_people WHERE date_int = #{date_int} ;
INSERT INTO intermediate_by_people
(date_int, user_id, community_id, content_id, content_type, views, comments, shares, uploads, likes)
SELECT date_int, user_id, community_id, content_id, content_type, views, comments, shares, uploads, likes
FROM _by_people_daily ;
我每次都会收到错误
ActiveRecord::StatementInvalid: Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DROP TABLE IF EXISTS _by_people_daily;
但是当我将查询传递给mysql客户端时,它正常工作。
我做错了什么以及如何使用ActiveRecord执行couple sql语句
答案 0 :(得分:3)
ActiveRecord的MySQL连接默认只能执行一个语句。要执行多个语句,创建连接时需要将CLIENT_MULTI_STATEMENTS
(65536)作为选项传递。代码可能如下所示:
ConnectionAdapters::MysqlAdapter.new(mysql, logger, [host, username, password, database, port, socket, 65536], config)
您可以在mysql gem中找到ConnectionAdapters::MysqlAdapter.new
,并在config/initializers
中覆盖该方法。 Here是详细指南。
答案 1 :(得分:1)
您是否尝试转发查询?
DROP TABLE IF EXISTS `_by_people_daily`
以下划线开头的表看起来很可疑。
<强>更新强>
通过google查看我发现的内容:http://www.seanr.ca/tech/?p=75