feat(database): add indexes for content provider and images

src/main/java/db/migration/V0017__AddIndexImagesObjectKey.java

@@ -0,0 +1,36 @@
+package db.migration;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import javax.sql.DataSource;
+import org.flywaydb.core.api.configuration.Configuration;
+import org.flywaydb.core.api.migration.BaseJavaMigration;
+import org.flywaydb.core.api.migration.Context;
+
+public class V0017__AddIndexImagesObjectKey extends BaseJavaMigration {
+
+  @Override
+  public void migrate(Context context) throws Exception {
+    Configuration config = context.getConfiguration();
+
+    try (Connection conn = getFreshConnection(config);
+        Statement stmt = conn.createStatement()) {
+      stmt.execute(
+          "CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_images_object_key ON images(object_key)");
+    }
+  }
+
+  private Connection getFreshConnection(Configuration config) throws Exception {
+    DataSource dataSource = config.getDataSource();
+    if (dataSource != null) {
+      return dataSource.getConnection();
+    }
+    return DriverManager.getConnection(config.getUrl(), config.getUser(), config.getPassword());
+  }
+
+  @Override
+  public boolean canExecuteInTransaction() {
+    return false;
+  }
+}

src/main/resources/db/migration/V0016__CLEAR_TAIMU_CONTENT.sql

@@ -1,3 +1,9 @@
+CREATE INDEX IF NOT EXISTS idx_manga_ingest_reviews_provider ON manga_ingest_reviews(content_provider_id);
+CREATE INDEX IF NOT EXISTS idx_manga_content_provider_provider ON manga_content_provider(content_provider_id);
+CREATE INDEX IF NOT EXISTS idx_manga_content_images_image ON manga_content_images(image_id);
+CREATE INDEX IF NOT EXISTS idx_mangas_cover_image ON mangas(cover_image_id);
+CREATE INDEX IF NOT EXISTS idx_content_providers_name ON content_providers(name);
+
 DELETE FROM manga_ingest_reviews
 WHERE content_provider_id = (SELECT id FROM content_providers WHERE name = 'Taimu');
 
@@ -5,5 +11,5 @@ DELETE FROM manga_content_provider
 WHERE content_provider_id = (SELECT id FROM content_providers WHERE name = 'Taimu');
 
 DELETE FROM images
-WHERE id NOT IN (SELECT DISTINCT image_id FROM manga_content_images WHERE image_id IS NOT NULL)
+WHERE NOT EXISTS (SELECT 1 FROM manga_content_images WHERE image_id = images.id)
-  AND id NOT IN (SELECT DISTINCT cover_image_id FROM mangas WHERE cover_image_id IS NOT NULL);
+  AND NOT EXISTS (SELECT 1 FROM mangas WHERE cover_image_id = images.id);

src/main/resources/db/migration/V0017__ADD_INDEX_IMAGES_OBJECT_KEY.sql

@@ -1 +0,0 @@
-CREATE INDEX IF NOT EXISTS idx_images_object_key ON images(object_key);