def add_columns(self, frame, expression, schema, columns_accessed=None):
if not schema or not hasattr(schema, "__iter__"):
raise ValueError("add_columns requires a non-empty schema of (name, type)")
only_one_column = False
if isinstance(schema[0], basestring):
only_one_column = True
schema = [schema]
schema = self._format_schema(schema)
names, data_types = zip(*schema)
optimized_frame_schema = []
if columns_accessed:
if isinstance(columns_accessed, basestring):
columns_accessed = [columns_accessed]
frame_schema = frame.schema
for i in columns_accessed:
for j in frame_schema:
if i == j[0]:
optimized_frame_schema.append(j)
# By default columns_accessed is an empty list and optimized frame schema is empty which implies frame.schema is considered to evaluate
columns_accessed, optimized_frame_schema = ([], None) if columns_accessed is None else (columns_accessed, optimized_frame_schema)
add_columns_function = get_add_one_column_function(expression, data_types[0]) if only_one_column \
else get_add_many_columns_function(expression, data_types)
from itertools import imap
arguments = {'frame': frame.uri,
'column_names': names,
'column_types': [get_rest_str_from_data_type(t) for t in data_types],
'udf': get_udf_arg(frame, add_columns_function, imap, optimized_frame_schema),
'columns_accessed': columns_accessed}
execute_update_frame_command('add_columns', arguments, frame)
def add_columns(self, frame, expression, schema, columns_accessed=None):
if not schema or not hasattr(schema, "__iter__"):
raise ValueError("add_columns requires a non-empty schema of (name, type)")
only_one_column = False
if isinstance(schema[0], basestring):
only_one_column = True
schema = [schema]
schema = self._format_schema(schema)
names, data_types = zip(*schema)
optimized_frame_schema = []
if columns_accessed:
if isinstance(columns_accessed, basestring):
columns_accessed = [columns_accessed]
frame_schema = frame.schema
for i in columns_accessed:
for j in frame_schema:
if i == j[0]:
optimized_frame_schema.append(j)
# By default columns_accessed is an empty list and optimized frame schema is empty which implies frame.schema is considered to evaluate
columns_accessed, optimized_frame_schema = ([], None) if columns_accessed is None else (columns_accessed, optimized_frame_schema)
add_columns_function = get_add_one_column_function(expression, data_types[0]) if only_one_column \
else get_add_many_columns_function(expression, data_types)
from itertools import imap
arguments = {'frame': frame.uri,
'column_names': names,
'column_types': [get_rest_str_from_data_type(t) for t in data_types],
'udf': get_udf_arg(frame, add_columns_function, imap, optimized_frame_schema),
'columns_accessed': columns_accessed}
execute_update_frame_command('add_columns', arguments, frame)