我需要编写一个 pig 脚本,在其中查找几列的平均值并仅获取所有列值都大于计算平均值的那些行。我的脚本是:
i2 = GROUP i1 all;
i3 = FOREACH i2 GENERATE AVG(i1.user_followers_count) AS avg_user_followers_count, AVG(i1.avl_user_follower_following_ratio) AS avg_avl_user_follower_following_ratio, AVG(i1.user_total_liked) AS avg_user_total_liked, AVG(i1.user_total_posts) AS avg_user_total_posts, AVG(i1.user_total_public_lists) AS avg_user_total_public_lists, AVG(i1.avl_user_total_retweets) AS avg_avl_user_total_retweets, AVG(i1.avl_user_total_likes) AS avl_user_total_likes, AVG(i1.avl_user_total_replies) AS avg_avl_user_total_replies, AVG(i1.avl_user_engagements) AS avl_avl_user_engagements, AVG(i1.user_reply_to_reply_count) AS avg_user_reply_to_reply_count;
top_inf = FILTER i1 BY (i1.user_followers_count > i3.avg_user_followers_count, i1.avl_user_total_retweets > i3. avg_avl_user_total_retweets, i1.avl_user_total_likes > i3.avg_avl_user_total_retweets);
但这会引发错误:
ERROR 1200: <file user.pig, line 70, column 103> mismatched input '>' expecting RIGHT_PAREN
在多个条件下过滤行的正确方法是什么?
最佳答案
使用 AND 分隔条件
top_inf = FILTER i1 BY (i1.user_followers_count > i3.avg_user_followers_count)
AND (i1.avl_user_total_retweets > i3.avg_avl_user_total_retweets)
AND (i1.avl_user_total_likes > i3.avg_avl_user_total_retweets);
关于apache-pig - 在 Pig 中使用多个条件过滤列,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40598443/