* fix: create directory of database if it does not exist * fix code quality issue Former-commit-id: 88c95717436489ff9014d88374775cc4c3f265b3 [formerly dc56f2c1c3bf46aac9a23e700780743ad15866c8] [formerly 92c2f9a68d575fb6e13453df6690c72f05ca9598 [formerly de205177f26d7c09010fc47076b385a57f666a9b]] Former-commit-id: d0888c2f73fa691b900ddc7cbece6dbef985da96 [formerly a7495f66547f1814d31b1ca41148133d23198fd5] Former-commit-id: a60afcd1fc6aa5cc88559025d7b3176b60117544