如何在Hive中提取子字符串

Question

I am having trouble trying to extract substring in Hive. The table I am working on has a column called referee_dict, showing the rank and corresponding players' IDs. For example, a record could look like this:

[('Bronze1', [2738653, 2738652, 2738655]), ('Bronze2', [2738653, 2738652]), ('Bronze3', []), ('Silver1', []), ('Silver2', []), ('Silver3', [])

I am trying to find the players who have achieved bronze 2, so I want to extract [2738653, 2738652] from the list. I know it is pretty easy in Python, however, I looked up Hive's documentation but still do not know how to do it in sql/Hive. Any help would be appreciated!

Answer 1

Well I think I figured out a way.. however I don't know if it is the easiest one. Since it is a string, I am going to use regex to capture the substring after "Bronze1' [" and before next "]". The function I am going to use is
regexp_extract(string subject, string pattern, int index). Hope this helps if anyone has similar questions.