[Tarantool-patches] [PATCH] sql: fix assertion fail when selecting from _vfunc

[Vladislav Shpilevoy]

LGTM.

On 21/12/2019 19:57, Chris Sosnin wrote:
> Hi! Thank you for the review and for your fixes!
> 
> I agree with your changes, although I had to fix the test
> because it does not fail even without this fix. New query
> will cause assertion with an old format.
> The patch below:
> 
> The assertion mentioned #4666 fails because it was forgotten to update
> _vfunc format along with _func in 2.2.1. This leads to bad allocation
> of vdbe cursor and setting wrong memory to 0.
> 
> Closes #4666
> ---
> branch: https://github.com/tarantool/tarantool/tree/ksosnin/gh-4666-select-from-vfunc
> issue: https://github.com/tarantool/tarantool/issues/4666
> 
>  src/box/bootstrap.snap                        | Bin 5921 -> 5916 bytes
>  src/box/lua/upgrade.lua                       |   7 +++++++
>  test/box-py/bootstrap.result                  |   9 ++++++++-
>  test/sql/engine.cfg                           |   1 +
>  test/sql/gh-4666-sql-select-from-vfunc.result |  11 +++++++++++
>  .../gh-4666-sql-select-from-vfunc.test.lua    |   4 ++++
>  6 files changed, 31 insertions(+), 1 deletion(-)
>  create mode 100644 test/sql/gh-4666-sql-select-from-vfunc.result
>  create mode 100644 test/sql/gh-4666-sql-select-from-vfunc.test.lua
> 
> diff --git a/src/box/lua/upgrade.lua b/src/box/lua/upgrade.lua
> index 07f1e0317..e57c23547 100644
> --- a/src/box/lua/upgrade.lua
> +++ b/src/box/lua/upgrade.lua
> @@ -951,8 +951,15 @@ local function drop_func_collation()
>      _func.index.name:alter({parts = {{'name', 'string'}}})
>  end
>  
> +local function update_vfunc_format()
> +    local _func = box.space[box.schema.FUNC_ID]
> +    local _vfunc = box.space[box.schema.VFUNC_ID]
> +    _vfunc:format(_func:format())
> +end
> +
>  local function upgrade_to_2_3_1()
>      drop_func_collation()
> +    update_vfunc_format()
>  end
>  
>  --------------------------------------------------------------------------------
> diff --git a/test/box-py/bootstrap.result b/test/box-py/bootstrap.result
> index 938a7631e..56bb43872 100644
> --- a/test/box-py/bootstrap.result
> +++ b/test/box-py/bootstrap.result
> @@ -63,7 +63,14 @@ box.space._space:select{}
>          'type': 'string'}, {'name': 'last_altered', 'type': 'string'}]]
>    - [297, 1, '_vfunc', 'sysview', 0, {}, [{'name': 'id', 'type': 'unsigned'}, {'name': 'owner',
>          'type': 'unsigned'}, {'name': 'name', 'type': 'string'}, {'name': 'setuid',
> -        'type': 'unsigned'}]]
> +        'type': 'unsigned'}, {'name': 'language', 'type': 'string'}, {'name': 'body',
> +        'type': 'string'}, {'name': 'routine_type', 'type': 'string'}, {'name': 'param_list',
> +        'type': 'array'}, {'name': 'returns', 'type': 'string'}, {'name': 'aggregate',
> +        'type': 'string'}, {'name': 'sql_data_access', 'type': 'string'}, {'name': 'is_deterministic',
> +        'type': 'boolean'}, {'name': 'is_sandboxed', 'type': 'boolean'}, {'name': 'is_null_call',
> +        'type': 'boolean'}, {'name': 'exports', 'type': 'array'}, {'name': 'opts',
> +        'type': 'map'}, {'name': 'comment', 'type': 'string'}, {'name': 'created',
> +        'type': 'string'}, {'name': 'last_altered', 'type': 'string'}]]
>    - [304, 1, '_user', 'memtx', 0, {}, [{'name': 'id', 'type': 'unsigned'}, {'name': 'owner',
>          'type': 'unsigned'}, {'name': 'name', 'type': 'string'}, {'name': 'type',
>          'type': 'string'}, {'name': 'auth', 'type': 'map'}]]
> diff --git a/test/sql/engine.cfg b/test/sql/engine.cfg
> index 284c42082..5e8199ad8 100644
> --- a/test/sql/engine.cfg
> +++ b/test/sql/engine.cfg
> @@ -5,6 +5,7 @@
>      "sql-debug.test.lua": {
>          "memtx": {"engine": "memtx"}
>      },
> +    "gh-4666-sql-select-from-vfunc.test.lua": { },
>      "bind.test.lua": {
>          "remote": {"remote": "true"},
>          "local": {"remote": "false"}
> diff --git a/test/sql/gh-4666-sql-select-from-vfunc.result b/test/sql/gh-4666-sql-select-from-vfunc.result
> new file mode 100644
> index 000000000..d57c66867
> --- /dev/null
> +++ b/test/sql/gh-4666-sql-select-from-vfunc.result
> @@ -0,0 +1,11 @@
> +--
> +-- Make sure assertion does not fail.
> +--
> +box.execute([[select "id" from "_vfunc" where "id" = 1;]])
> +---
> +- metadata:
> +  - name: id
> +    type: unsigned
> +  rows:
> +  - [1]
> +...
> diff --git a/test/sql/gh-4666-sql-select-from-vfunc.test.lua b/test/sql/gh-4666-sql-select-from-vfunc.test.lua
> new file mode 100644
> index 000000000..fa296e1e1
> --- /dev/null
> +++ b/test/sql/gh-4666-sql-select-from-vfunc.test.lua
> @@ -0,0 +1,4 @@
> +--
> +-- Make sure assertion does not fail.
> +--
> +box.execute([[select "id" from "_vfunc" where "id" = 1;]])
>