class DuckDB::Appender

.flush
.end_row
.append_null
appender
appender = con.appender('values')
con.query('CREATE TABLE values (value INTEGER)')
con = db.connect
db = DuckDB::Database.open
require 'duckdb'

Appends a NULL value to the current row in the appender.

appender.append_null -> self
call-seq:

def append_null
  return self if _append_null
  raise_appender_error('failed to append_null')
end