Chirag Shankar

Batch improvement

1

The idea is too emulate the way [JDBCIO](https://github.com/apache/beam/blob/a0dbc6f4d87ee3c6144c5afc3d250f98701f771b/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcIO.java#L1432) writes to SQL. When calling [`write_record`](https://github.com/mohaseeb/beam-nuggets/blob/39d2493b161ebbcbff9f4857115d527f6fefda77/beam_nuggets/io/relational_db_api.py#L354) it does the `.execute()` and then `.commit()` in sequence, writing and committing each record to disk...

### What would you like to happen? Support customization for dynamic destinations when using Python SDK, BigQueryIO to allow users to embed destination tables without writing it to BigQuery. A...