Merge pull request #4217 from thematters/feat/deprecate-tag-management

feat(tag): retire unused tag queries and previous deprecated

db/migrations/20241112112619_create_tag_stats_view.js

@@ -0,0 +1,58 @@
+const materialized = 'tag_stats_materialized'
+
+exports.up = async (knex) => {
+  await knex.raw(`DROP MATERIALIZED VIEW IF EXISTS ${materialized}`)
+
+  await knex.raw(`
+    CREATE MATERIALIZED VIEW ${materialized} AS
+    WITH article_tags AS (
+        SELECT
+            at.tag_id,
+            at.article_id,
+            article.author_id
+        FROM article_tag at
+            INNER JOIN article
+                ON article.id = at.article_id
+            INNER JOIN "user" u
+                ON u.id = article.author_id
+        WHERE article.state = 'active'
+            AND u.state NOT IN ('forzen', 'archived')
+            AND u.id NOT IN (
+                SELECT user_id
+                FROM user_restriction
+            )
+            AND at.created_at AT TIME ZONE 'Asia/Taipei' >= NOW() - INTERVAL '12 months'
+            AND at.created_at AT TIME ZONE 'Asia/Taipei' < NOW()
+    ),
+    tag_stats AS (
+        SELECT
+            tag_id,
+            COUNT(article_id)::INT AS all_articles,
+            COUNT(DISTINCT author_id)::INT AS all_users
+        FROM article_tags
+        GROUP BY tag_id
+    ),
+    user_threshold AS (
+        SELECT DISTINCT
+            PERCENTILE_CONT(0.15) WITHIN GROUP (ORDER BY all_users) AS threshold
+        FROM tag_stats
+    )
+    SELECT
+        ts.tag_id,
+        tag.content,
+        ts.all_articles,
+        ts.all_users
+    FROM tag_stats ts
+        INNER JOIN tag
+            ON tag.id = ts.tag_id
+        CROSS JOIN user_threshold ut
+    WHERE ts.all_users > ut.threshold
+    ORDER BY
+        ts.all_users DESC,
+        ts.all_articles DESC
+  `)
+}
+
+exports.down = async (knex) => {
+  await knex.raw(`DROP MATERIALIZED VIEW IF EXISTS ${materialized}`)
+}

db/migrations/20241112165500_create_article_stats_view.js

@@ -0,0 +1,27 @@
+const table = 'article_stats_materialized'
+
+exports.up = async (knex) => {
+  await knex.raw(`
+    CREATE MATERIALIZED VIEW ${table} AS
+    SELECT
+      COALESCE(r.article_id, c.reference_id) as article_id,
+      COALESCE(r.reads, 0) as reads,
+      COALESCE(c.claps, 0) as claps
+    FROM (
+      SELECT article_id, sum(timed_count)::int AS reads
+      FROM article_read_count
+      WHERE user_id IS NOT NULL
+      GROUP BY article_id
+    ) r
+    FULL OUTER JOIN (
+      SELECT reference_id, sum(amount)::int AS claps
+      FROM appreciation
+      WHERE purpose = 'appreciate'
+      GROUP BY reference_id
+    ) c ON r.article_id = c.reference_id
+  `)
+}
+
+exports.down = async (knex) => {
+  await knex.raw(`DROP MATERIALIZED VIEW IF EXISTS ${table}`)
+}

db/migrations/20241113094622_create_tag_hottest_view.js

@@ -0,0 +1,71 @@
+const table = 'tag_hottest_materialized'
+
+exports.up = async (knex) => {
+  await knex.raw(`
+    CREATE MATERIALIZED VIEW ${table} AS
+    WITH raw_article_data AS (
+      SELECT
+        at.tag_id,
+        to_char(article.created_at, 'YYYYMM') AS month,
+        at.article_id,
+        article.author_id
+      FROM article_tag AS at
+        INNER JOIN article ON article.id = at.article_id
+        INNER JOIN "user" AS u ON u.id = article.author_id
+      WHERE article.state = 'active'
+        AND u.state NOT in('frozen', 'archived')
+        AND u.id NOT in(SELECT user_id FROM user_restriction)
+    ),
+    monthly_stats AS (
+      SELECT tag_id, month,
+        count(article_id)::int articles,
+        count(DISTINCT author_id)::int users
+      FROM raw_article_data
+      GROUP BY tag_id, month
+    ),
+    tag_averages AS (
+      SELECT tag_id,
+        count(month) AS months,
+        avg(articles) AS mean_articles,
+        avg(users) AS mean_users
+      FROM monthly_stats
+      GROUP BY tag_id
+    ),
+    tag_z_scores AS (
+      SELECT tag_id, months,
+        (months - avg(months) OVER()) / NULLIF(stddev(months) OVER(), 0) AS z_months,
+        mean_articles,
+        (mean_articles - avg(mean_articles) OVER()) / NULLIF(stddev(mean_articles) OVER(), 0) AS z_articles,
+        mean_users,
+        (mean_users - avg(mean_users) OVER()) / NULLIF(stddev(mean_users) OVER(), 0) AS z_users
+      FROM tag_averages
+    ),
+    significant_scores AS (
+      SELECT tag_id, months,
+        CASE WHEN z_months < 2 THEN 0 ELSE z_months END AS z_months,
+        mean_articles,
+        CASE WHEN z_articles < 2 THEN 0 ELSE z_articles END AS z_articles,
+        mean_users,
+        CASE WHEN z_users < 2 THEN 0 ELSE z_users END AS z_users
+      FROM tag_z_scores
+    )
+    SELECT
+      base.tag_id,
+      tag.content,
+      base.months,
+      base.mean_articles,
+      base.mean_users,
+      base.score
+    FROM (
+      SELECT *, z_months * z_articles * z_users AS score
+      FROM significant_scores
+    ) AS base
+    INNER JOIN tag ON tag.id = base.tag_id
+    WHERE base.score > 0
+    ORDER BY base.score DESC
+  `)
+}
+
+exports.down = async (knex) => {
+  await knex.raw(`DROP MATERIALIZED VIEW IF EXISTS ${table}`)
+}