module ActiveRecord::Import::SQLite3Adapter

def insert_many(sql, values, *args) # :nodoc:

:nodoc:
elements that are in position >= 1 will be appended to the final SQL.
+sql+ can be a single string or an array. If it is an array all 
def insert_many(sql, values, *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)
  value_sets.each do |values|
    number_of_inserts += 1
    sql2insert = base_sql + values.join( ',' ) + post_sql
    insert( sql2insert, *args )
  end
  [number_of_inserts,[]]
end

def next_value_for_sequence(sequence_name) 

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

def supports_import?(current_version=self.sqlite_version)

Which INSERT statements with multiple value sets was introduced in 3.7.11.
to ensure that we only support import in supported version of SQLite.
Override our conformance to ActiveRecord::Import::ImportSupport interface 
def supports_import?(current_version=self.sqlite_version)
  if current_version >= MIN_VERSION_FOR_IMPORT
    true
  else
    false
  end
end