Introduce separate search index

Uses a fts5 virtual table, kept up to date via triggers on the records table.
2024-11-22 10:01:48 +00:00
parent be36c29f76
commit 2e2000fe01
6 changed files with 215 additions and 27 deletions
@@ -0,0 +1,151 @@
+defmodule MusicLibrary.Repo.Migrations.CreateRecordsSearchIndex do
+  use Ecto.Migration
+
+  def up do
+    execute """
+    CREATE VIRTUAL TABLE records_search_index USING fts5(
+      id UNINDEXED,
+      type,
+      format,
+      title,
+      artists,
+      genres,
+      musicbrainz_id,
+      release_ids UNINDEXED,
+      included_release_group_ids UNINDEXED,
+      cover_hash UNINDEXED,
+      purchased_at UNINDEXED,
+      release
+    );
+    """
+
+    flush()
+
+    execute """
+    CREATE TRIGGER records_search_index_before_update
+    BEFORE UPDATE ON records
+    BEGIN
+      DELETE FROM records_search_index WHERE id=OLD.id;
+    END;
+    """
+
+    execute """
+    CREATE TRIGGER records_search_index_before_delete
+    BEFORE DELETE ON records
+    BEGIN
+      DELETE FROM records_search_index WHERE id=OLD.id;
+    END;
+    """
+
+    execute """
+    CREATE TRIGGER records_after_insert
+    AFTER INSERT ON records
+    BEGIN
+      INSERT INTO records_search_index(
+        id,
+        type,
+        format,
+        title,
+        artists,
+        genres,
+        musicbrainz_id,
+        release_ids,
+        included_release_group_ids,
+        cover_hash,
+        purchased_at,
+        release
+      ) SELECT
+        id,
+        type,
+        format,
+        title,
+        artists,
+        genres,
+        musicbrainz_id,
+        release_ids,
+        included_release_group_ids,
+        cover_hash,
+        purchased_at,
+        release
+      FROM records
+      WHERE NEW.id = records.id;
+    END;
+    """
+
+    execute """
+    CREATE TRIGGER records_after_update
+    AFTER UPDATE ON records
+    BEGIN
+      INSERT INTO records_search_index(
+        id,
+        type,
+        format,
+        title,
+        artists,
+        genres,
+        musicbrainz_id,
+        release_ids,
+        included_release_group_ids,
+        cover_hash,
+        purchased_at,
+        release
+      ) SELECT
+        id,
+        type,
+        format,
+        title,
+        artists,
+        genres,
+        musicbrainz_id,
+        release_ids,
+        included_release_group_ids,
+        cover_hash,
+        purchased_at,
+        release
+      FROM records
+      WHERE NEW.id = records.id;
+    END;
+    """
+
+    flush()
+
+    execute """
+    INSERT INTO records_search_index(
+      id,
+      type,
+      format,
+      title,
+      artists,
+      genres,
+      musicbrainz_id,
+      release_ids,
+      included_release_group_ids,
+      cover_hash,
+      purchased_at,
+      release
+    ) SELECT
+      id,
+      type,
+      format,
+      title,
+      artists,
+      genres,
+      musicbrainz_id,
+      release_ids,
+      included_release_group_ids,
+      cover_hash,
+      purchased_at,
+      release
+    FROM records;
+    """
+
+    flush()
+  end
+
+  def down do
+    execute "DROP TRIGGER IF EXISTS records_search_index_before_update"
+    execute "DROP TRIGGER IF EXISTS records_search_index_before_delete"
+    execute "DROP TRIGGER IF EXISTS records_after_update"
+    execute "DROP TABLE records_search_index"
+  end
+end