module ActiveRecord::Import::SQLite3Adapter

def insert_many( sql, values, _options = {}, *args ) # :nodoc:
  number_of_inserts = 0
  base_sql, post_sql = if sql.is_a?( String )
    [sql, '']
  elsif sql.is_a?( Array )
    [sql.shift, sql.join( ' ' )]
  end
  value_sets = ::ActiveRecord::Import::ValueSetsRecordsParser.parse(values,
    max_records: SQLITE_LIMIT_COMPOUND_SELECT)
  transaction(requires_new: true) do
    value_sets.each do |value_set|
      number_of_inserts += 1
      sql2insert = base_sql + value_set.join( ',' ) + post_sql
      insert( sql2insert, *args )
    end
  end
  ActiveRecord::Import::Result.new([], number_of_inserts, [], [])
end

def next_value_for_sequence(sequence_name)
  %{nextval('#{sequence_name}')}
end

def pre_sql_statements( options)
  sql = []
  # Options :recursive and :on_duplicate_key_ignore are mutually exclusive
  if (options[:ignore] || options[:on_duplicate_key_ignore]) && !options[:recursive]
    sql << "OR IGNORE"
  end
  sql + super
end

def supports_import?(current_version = sqlite_version)
  if current_version >= MIN_VERSION_FOR_IMPORT
    true
  else
    false
  end
end