[PATCH v4 0/2] memtx: add yields during index build

[Serge Petrenko]

This patchset makes memtx engine yield during index build, which prevents it
from stalling the event loop, and moves appropriate test cases from vinyl suite,
where such a feature was implemented earlier, to engine suite.

The first patch introduces changes in index build mechanism
The second patch adds necessary tests

Changes in v4:
  - move errinj introduction to the
    second patch
  - move more tests from vinyl/errinj_ddl
    to engine/errinj_ddl
  - unify errinjs in memtx and vinyl index
    build for easier testing
  - ref count cursor before yield in index
    build

Changes in v3:
 - split the patch into two,
   the second one moving appropriate
   tests from vinyl to engine suite
 - add a docbot request to the
   first patch
 - ensure index unique constraints
   are checked in on_replace triggers
 - fix tuple comparsion in on_replace
   triggers

Changes in v2:
 - add an on_replace trigger
   to handle concurrent replaces
   while index build yields
 - modify test case slightly,
   test concurrent replaces.

Serge Petrenko (2):
  memtx: add yields during index build
  test: move background index build test to engine suite from vinyl

 src/box/memtx_space.c           | 107 ++++++++++++
 src/box/vinyl.c                 |  16 ++
 src/lib/core/errinj.h           |   1 +
 test/box/errinj.result          |   2 +
 test/engine/ddl.result          | 111 +++++++++++++
 test/engine/ddl.test.lua        |  72 ++++++++
 test/engine/errinj_ddl.result   | 284 ++++++++++++++++++++++++++++++++
 test/engine/errinj_ddl.test.lua | 133 +++++++++++++++
 test/engine/suite.ini           |   2 +-
 test/vinyl/ddl.result           | 118 -------------
 test/vinyl/ddl.test.lua         |  70 --------
 test/vinyl/errinj_ddl.result    | 182 --------------------
 test/vinyl/errinj_ddl.test.lua  |  81 ---------
 13 files changed, 727 insertions(+), 452 deletions(-)
 create mode 100644 test/engine/errinj_ddl.result
 create mode 100644 test/engine/errinj_ddl.test.lua

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2.20.1 (Apple Git-117)