공개 검색 인덱스 추가

db/migrations/065_public_search_index.sql

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+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+
+ALTER TABLE posts
+  ADD COLUMN IF NOT EXISTS search_text TEXT NOT NULL DEFAULT '';
+
+ALTER TABLE pages
+  ADD COLUMN IF NOT EXISTS search_text TEXT NOT NULL DEFAULT '';
+
+CREATE OR REPLACE FUNCTION normalize_public_search_text(value TEXT)
+RETURNS TEXT
+LANGUAGE sql
+IMMUTABLE
+AS $$
+  SELECT lower(trim(regexp_replace(
+    regexp_replace(
+      regexp_replace(coalesce(value, ''), E'!\\[[^]]*\\]\\([^)]*\\)', ' ', 'g'),
+      E'/uploads/[^[:space:])"]+',
+      ' ',
+      'g'
+    ),
+    E'[[:space:]]+',
+    ' ',
+    'g'
+  )))
+$$;
+
+CREATE OR REPLACE FUNCTION set_post_search_text()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  NEW.search_text := normalize_public_search_text(concat_ws(E'\n', NEW.title, NEW.excerpt, NEW.content));
+  RETURN NEW;
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION set_page_search_text()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  NEW.search_text := normalize_public_search_text(concat_ws(E'\n', NEW.title, NEW.listing_section, NEW.listing_title, NEW.listing_description, NEW.content));
+  RETURN NEW;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS posts_search_text_before_write ON posts;
+
+CREATE TRIGGER posts_search_text_before_write
+  BEFORE INSERT OR UPDATE OF title, excerpt, content
+  ON posts
+  FOR EACH ROW
+  EXECUTE FUNCTION set_post_search_text();
+
+DROP TRIGGER IF EXISTS pages_search_text_before_write ON pages;
+
+CREATE TRIGGER pages_search_text_before_write
+  BEFORE INSERT OR UPDATE OF title, listing_section, listing_title, listing_description, content
+  ON pages
+  FOR EACH ROW
+  EXECUTE FUNCTION set_page_search_text();
+
+UPDATE posts
+SET search_text = normalize_public_search_text(concat_ws(E'\n', title, excerpt, content));
+
+UPDATE pages
+SET search_text = normalize_public_search_text(concat_ws(E'\n', title, listing_section, listing_title, listing_description, content));
+
+CREATE INDEX IF NOT EXISTS posts_public_search_text_trgm_idx
+  ON posts USING gin (search_text gin_trgm_ops)
+  WHERE status = 'published';
+
+CREATE INDEX IF NOT EXISTS pages_public_search_text_trgm_idx
+  ON pages USING gin (search_text gin_trgm_ops)
+  WHERE status = 'published' AND is_listed = true;
+
+CREATE INDEX IF NOT EXISTS tags_name_trgm_idx
+  ON tags USING gin ((lower(name)) gin_trgm_ops);
+
+CREATE INDEX IF NOT EXISTS tags_slug_trgm_idx
+  ON tags USING gin ((lower(slug)) gin_trgm_ops);