[Tarantool-patches] [PATCH v2 00/16] sql: prepared statements

[Nikita Pettik]

Branch: https://github.com/tarantool/tarantool/tree/np/gh-2592-prepared-statemets-v2
Issue: https://github.com/tarantool/tarantool/issues/2592

Patch v1: https://lists.tarantool.org/pipermail/tarantool-patches/2019-November/012274.html

Changes in this iteration:

- Now cache is global and statements are shared among all session
  (main reason for this change is to increase performance);
- Cache follows next eviction policy: when there's no space for
  another one statement, statement which was prepared earlier than others
  is removed from cache (strickly speaking it's not LRU policy, but rather
  FIFO; however, the same approach is already used for tuple cache and it
  is called LRU anyway);
- Owing to the previous point, there's no need in 'unprepare' invocation
  at all (it concerns both manual request and on_disconnect clean-up);
- Also due to using replacement policy eviction from cache should
  not be "visible" to user, i.e. statement should still be capable of being
  executed. Keeping only numeric ids doesn't allow this, so now we use
  string ids (which consist of original SQL request);
- Statement is automatically re-prepared (on demand) if it is expired
  as a result of DDL request;
- In case statement is busy (is executed right now by other session), it
  is compiled from scratch and then executed.

Nikita Pettik (16):
  sql: remove sql_prepare_v2()
  sql: refactor sql_prepare() and sqlPrepare()
  sql: move sql_prepare() declaration to box/execute.h
  sql: rename sqlPrepare() to sql_compile()
  sql: move sql_finalize() to execute.h
  port: increase padding of struct port
  port: add dump format and request type to port_sql
  sql: resurrect sql_bind_parameter_count() function
  sql: resurrect sql_bind_parameter_name()
  sql: add sql_stmt_schema_version()
  sql: introduce sql_stmt_sizeof() function
  box: increment schema_version on ddl operations
  sql: introduce sql_stmt_query_str() method
  sql: introduce cache for prepared statemets
  box: introduce prepared statements
  netbox: introduce prepared statements

 src/box/CMakeLists.txt          |   1 +
 src/box/alter.cc                |   3 +
 src/box/box.cc                  |  20 ++
 src/box/box.h                   |   1 +
 src/box/ck_constraint.c         |   1 +
 src/box/errcode.h               |   1 +
 src/box/execute.c               | 213 ++++++++++++++-
 src/box/execute.h               |  51 ++++
 src/box/iproto.cc               |  25 +-
 src/box/iproto_constants.c      |   6 +-
 src/box/iproto_constants.h      |   4 +
 src/box/lua/cfg.cc              |  12 +
 src/box/lua/execute.c           | 161 ++++++++++-
 src/box/lua/execute.h           |   2 +-
 src/box/lua/init.c              |   2 +-
 src/box/lua/load_cfg.lua        |   3 +
 src/box/lua/net_box.c           |  79 ++++++
 src/box/lua/net_box.lua         |  13 +
 src/box/prep_stmt.c             | 186 +++++++++++++
 src/box/prep_stmt.h             | 112 ++++++++
 src/box/session.cc              |   1 +
 src/box/sql.c                   |   3 +
 src/box/sql/analyze.c           |  16 +-
 src/box/sql/legacy.c            |   3 +-
 src/box/sql/prepare.c           |  56 +---
 src/box/sql/sqlInt.h            |  44 +--
 src/box/sql/vdbe.h              |   2 +-
 src/box/sql/vdbeInt.h           |   1 -
 src/box/sql/vdbeapi.c           |  95 +++++--
 src/box/sql/vdbeaux.c           |   5 +-
 src/box/xrow.c                  |   2 +-
 src/box/xrow.h                  |   2 +-
 src/lib/core/port.h             |   2 +-
 test/app-tap/init_script.result |  37 +--
 test/box/admin.result           |   2 +
 test/box/cfg.result             |   7 +
 test/box/cfg.test.lua           |   1 +
 test/box/misc.result            |   3 +
 test/sql/engine.cfg             |   4 +
 test/sql/prepared.result        | 592 ++++++++++++++++++++++++++++++++++++++++
 test/sql/prepared.test.lua      | 227 +++++++++++++++
 41 files changed, 1851 insertions(+), 150 deletions(-)
 create mode 100644 src/box/prep_stmt.c
 create mode 100644 src/box/prep_stmt.h
 create mode 100644 test/sql/prepared.result
 create mode 100644 test/sql/prepared.test.lua

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2.15.1