[tarantool-patches] [PATCH v3 0/4] box: indexes by JSON path

[Kirill Shcherbatov <kshcherbatov@tarantool.org>]

Branch: http://github.com/tarantool/tarantool/tree/kshch/gh-1012-json-indexes
Issue: https://github.com/tarantool/tarantool/issues/1012

Sometimes field data could have complex document structure.
When this structure is consistent across whole document,
you are able to create an index by JSON path.
This came possible with auxiliary structures per tuple_format:
tree of intermediate path fields and hashtable refers to leaf field
that use path as key.
To speed-up data access by JSON index key_part structure extended
with offset_slot cache that points to field_map item containing
data offset for current tuple.
RFC contains detailed description of those concepts.
Finally, supported ability to define JSON paths in user-friendly
form containing format field name(that could be changed).

Changes in v3:
  - fixed JSON nullable fields
  - multiple binary optimizations for field map init for fields
    that have JSON paths
  - don't store same JSON path of different indexes twice in
    format for now
  - optimized and simplified tuple_field_by_part_raw
  - new teplate-based comparators/extractors
  - removed update space epoch to ModifySpaceFormat alter op
  - fixed key_def_find routine
  - much informative comments
  - exported LUA path resolve to core

Kirill Shcherbatov (4):
  rfc: describe a Tarantool JSON indexes
  box: introduce slot_cache in key_part
  box: introduce JSON indexes
  box: specify indexes in user-friendly form

 doc/rfc/1012-json-indexes.md | 188 +++++++++++
 src/box/alter.cc             |  38 +++
 src/box/errcode.h            |   2 +-
 src/box/index_def.c          |  10 +-
 src/box/key_def.c            | 296 +++++++++++++++--
 src/box/key_def.h            |  42 ++-
 src/box/lua/index.c          |  74 +++++
 src/box/lua/schema.lua       |  20 +-
 src/box/lua/space.cc         |   5 +
 src/box/memtx_bitset.c       |   8 +-
 src/box/memtx_engine.c       |   5 +
 src/box/memtx_rtree.c        |   6 +-
 src/box/schema.cc            |  12 +-
 src/box/tuple.c              |  11 +-
 src/box/tuple_compare.cc     | 142 ++++++--
 src/box/tuple_extract_key.cc | 146 ++++++---
 src/box/tuple_format.c       | 765 +++++++++++++++++++++++++++++++++++++++----
 src/box/tuple_format.h       |  80 ++++-
 src/box/tuple_hash.cc        |  67 +++-
 src/box/vinyl.c              |   5 +
 src/box/vy_log.c             |   3 +-
 src/box/vy_lsm.c             |  44 +++
 src/box/vy_point_lookup.c    |   2 -
 src/box/vy_stmt.c            | 124 +++++--
 src/box/vy_stmt.h            |   7 +-
 test/box/misc.result         |  57 ++--
 test/engine/iterator.result  |   2 +-
 test/engine/tuple.result     | 353 ++++++++++++++++++++
 test/engine/tuple.test.lua   |  99 ++++++
 29 files changed, 2332 insertions(+), 281 deletions(-)
 create mode 100644 doc/rfc/1012-json-indexes.md

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2.7.4