If it's set only the "rows" part of the response is returned.
This parameter is True by default because in most cases this is what we
want.

Close #765

Arseniy Volynets authored 8 months ago and Dmitry Rodionov committed 8 months ago

- Some sql queries that read from sharded tables
can fail with timeout error, but because of rethrows
it is showed as 'Connection reset error'. In order
to avoid retrying such tests in CI we can use retries
in tests. Note: solution to the problem itself is in
the progress, but we don't know when it will be done:
https://github.com/tarantool/vshard/pull/442

- Another solution is to use global tables instead of
sharded tables in tests where it does not matter.

- This commit uses both approaches: when possible sharded
tables were replaced with global ones. In other cases retries
were used.

- when doing global dml sql query, there is error
like user don't have access to 'raft_state` space.
Fix this by doing parts of pipeline that access
system spaces under admin

This is needed because we require Service::on_start callbacks to be
idempotent because governor may end up call them multiple times.