[repo] Drop repo.new_session method
we should not go through Session to create Connection anymore.
This is unofficial API, no backward compat for now.
from yams.constraints import UniqueConstraint
for rschema in schema.relations():
if rschema.rule or not rschema.final:
continue
for rdef in rschema.rdefs.values():
if (rdef.object != 'String'
and any(isinstance(cstr, UniqueConstraint) for cstr in rdef.constraints)):
table = 'cw_{0}'.format(rdef.subject)
column = 'cw_{0}'.format(rdef.rtype)
repo.system_source.create_index(cnx, table, column, unique=True)