[PATCH v2 0/3] Transactional DDL

[Vladimir Davydov]

This patch set implements transactional DDL for the case when all
statements are non-yielding. There are only two DDL statements that
may yield implicitly - building of a new index and checking a space
format - so it must cover most user stories. For more details re
the implementation, see comments to the individual patches.

https://github.com/tarantool/tarantool/issues/4083
https://github.com/tarantool/tarantool/commits/dv/gh-4083-transactional-ddl

v1: https://www.freelists.org/post/tarantool-patches/PATCH-05-Transactional-DDL

Changes in v2:
 - Committed approved patches and rebased.
 - Fixed wrong index usage in AlterSpaceOp::commit,rollback
 - Reworked error reporting.
 - Reworked txn_on_yield management.

Vladimir Davydov (3):
  memtx: fix txn_on_yield for DDL transactions
  ddl: don't use space_index from AlterSpaceOp::commit,rollback
  ddl: allow to execute non-yielding DDL statements in transactions

 src/box/alter.cc              | 91 ++++++++++++++--------------------------
 src/box/errcode.h             |  2 +-
 src/box/memtx_engine.c        | 96 ++----------------------------------------
 src/box/memtx_space.c         | 10 +++++
 src/box/txn.c                 | 89 ++++++++++++++++++++++++++++++++++++---
 src/box/txn.h                 | 63 +++++++++++++++-------------
 src/box/user.cc               |  1 -
 src/box/vinyl.c               | 25 ++++++++---
 test/box/misc.result          |  1 +
 test/box/on_replace.result    | 53 +++++++++++------------
 test/box/on_replace.test.lua  | 13 +++---
 test/box/transaction.result   | 98 +++++++++++++++++++++++++++++++++----------
 test/box/transaction.test.lua | 64 +++++++++++++++++++++++-----
 test/engine/ddl.result        | 58 ++++++++++++++++++++++++-
 test/engine/ddl.test.lua      | 39 ++++++++++++++++-
 test/engine/truncate.result   | 10 +----
 test/engine/truncate.test.lua |  6 +--
 17 files changed, 440 insertions(+), 279 deletions(-)

-- 
2.11.0