def column_reader(self, fieldname, column=None, reverse=False,
translate=True):
crs = []
doc_offsets = []
for i, r in enumerate(self.readers):
if r.has_column(fieldname):
cr = r.column_reader(fieldname, column=column, reverse=reverse,
translate=translate)
crs.append(cr)
doc_offsets.append(self.doc_offsets[i])
return columns.MultiColumnReader(crs, doc_offsets)
def column_reader(self, fieldname, column):
if not self.has_column(fieldname):
raise ValueError("No column %r" % (fieldname, ))
default = column.default_value()
colreaders = []
for r in self._readers:
if r.has_column(fieldname):
cr = r.column_reader(fieldname, column)
else:
cr = columns.EmptyColumnReader(default, r.doc_count_all())
colreaders.append(cr)
if len(colreaders) == 1:
return colreaders[0]
else:
return columns.MultiColumnReader(colreaders)
def column_reader(self,
fieldname,
column=None,
reverse=False,
translate=True):
column = column or self.schema[fieldname].column_type
if not column:
raise Exception("Field %r has no column type" % (fieldname, ))
creaders = []
for r in self.readers:
cr = r.column_reader(fieldname,
column=column,
reverse=reverse,
translate=translate)
creaders.append(cr)
return columns.MultiColumnReader(creaders)
def column_reader(self, fieldname, translate=True):
column = self.schema[fieldname].column_type
if not column:
raise Exception("Field %r has no column type" % (fieldname, ))
default = column.default_value()
doccount = self.doc_count_all()
creaders = []
for r in self.readers:
if r.has_column(fieldname):
creaders.append(r.column_reader(fieldname,
translate=translate))
else:
creaders.append(columns.EmptyColumnReader(default, doccount))
return columns.MultiColumnReader(creaders)