Mysql json based trending tags implementation

Question

I am trying to identifying the trending tags (based on maximum hits) on time series using mysql json feature. Below is my table

CREATE TABLE TAG_COUNTER (
           


        

Answer 1

I don't see a good reason, why you use JSON here. It's also not clear, why you believe that a "nosql schema" within MySQL would do anything better.

What you probably need is something like this:

CREATE TABLE TAG_COUNTER (
    account       varchar(36) NOT NULL,
    time_id       INT NOT NULL,
    tag_name      varchar(50) NOT NULL,
    counter       INT UNSIGNED NOT NULL,
    PRIMARY KEY   (account, time_id, tag_name)
);

This will simplify your queries. The INSERT statement would look like:

INSERT INTO TAG_COUNTER
  (account, time_id, tag_name, counter)
VALUES
  ('google', 2018061023, 'tag1', 1),
  ('google', 2018061023, 'tag2', 1)
ON DUPLICATE KEY UPDATE counter = counter + VALUES(counter);

The SELECT statement might be something like this

SELECT
    SUBSTRING(time_id, 1, 6) AS month,
    tag_name,
    SUM(counter) AS counter_agg
FROM TAG_COUNTER
GROUP BY month, tag_name
ORDER BY month, counter_agg DESC;

Note that I did't try to optimize the table/schema for data size and performance. That would be a different question. But you must see, that the queries are much simpler now.