How can i use database come from record ?

[JooyoungJeong]

i use fluent-plugin-influxdb:1.0.0.rc3

<filter container.*> @type record_transformer remove_keys Name enable_ruby true time ${Time.parse(record["time"]).to_i} test_value testdb

<match container.*> @type influxdb host influxdb port 8086 dbname ${test_value} user writer password YWM0ZGY2M2Y4NjY0 use_ssl false auto_tags true buffer_chunk_limit 8m buffer_queue_limit 32 buffer_queue_full_action drop_oldest_chunk flush_interval 1s num_threads 4

#0 Connecting to database: ${test_value}, host: influxdb, port: 8086, username: writer, use_ssl = false, verify_ssl = true