Create a variation of generate_insert_statement that returns a PostgreSQL copy statement, suitable for bulk loading of data formatted as csv.

Use copy instead of insert to bulk insert records. In PostgreSQL, copy is the fastest way to insert bulk data.

The override of generate_insert_statement is no longer used.

Use the type bind processors to generate values to ensure that values are represented correctly to PostgreSQL, especially for things like ARRAY and JSONB. Also, handle null values.

Always quote strings and handle array values.