[Tarantool-patches] [PATCH] sequence: return correct error on using dropped sequence

[Vladislav Shpilevoy]

LGTM.

On 26/02/2020 17:13, Chris Sosnin wrote:
> This code is called from C, so it shouldn't throw.
> 
> Closes #4753
> ---
> branch: https://github.com/tarantool/tarantool/tree/ksosnin/gh-4753-sequence-cpp-exception 
> issue: https://github.com/tarantool/tarantool/issues/4753
> 
>  src/box/schema.cc          |  2 +-
>  test/box/sequence.result   | 17 +++++++++++++++++
>  test/box/sequence.test.lua |  8 ++++++++
>  3 files changed, 26 insertions(+), 1 deletion(-)
> 
> diff --git a/src/box/schema.cc b/src/box/schema.cc
> index fab7544f2..456eef429 100644
> --- a/src/box/schema.cc
> +++ b/src/box/schema.cc
> @@ -646,7 +646,7 @@ sequence_cache_find(uint32_t id)
>  {
>  	struct sequence *seq = sequence_by_id(id);
>  	if (seq == NULL)
> -		tnt_raise(ClientError, ER_NO_SUCH_SEQUENCE, int2str(id));
> +		diag_set(ClientError, ER_NO_SUCH_SEQUENCE, int2str(id));
>  	return seq;
>  }
>  
> diff --git a/test/box/sequence.result b/test/box/sequence.result
> index 0a6cfee2c..32a094d6f 100644
> --- a/test/box/sequence.result
> +++ b/test/box/sequence.result
> @@ -2102,6 +2102,23 @@ s:drop()
>  ---
>  ...
>  --
> +-- gh-4753: accessing dropped sequence should yield correct error
> +--
> +s = box.schema.sequence.create('s')
> +---
> +...
> +s:drop()
> +---
> +...
> +s:next()
> +---
> +- error: Sequence '1' does not exist
> +...
> +s:reset()
> +---
> +- error: Sequence '1' does not exist
> +...
> +--
>  -- Check that altering parts of a primary index with a sequence
>  -- attached requires sequence update. Renaming fields does not.
>  --
> diff --git a/test/box/sequence.test.lua b/test/box/sequence.test.lua
> index 8e00571e5..d8a212fab 100644
> --- a/test/box/sequence.test.lua
> +++ b/test/box/sequence.test.lua
> @@ -710,6 +710,14 @@ s.index.pk:alter{sequence = {field = 'x.a.b[1]'}}
>  s:replace{{a = {b = {box.NULL}}}} -- ok
>  s:drop()
>  
> +--
> +-- gh-4753: accessing dropped sequence should yield correct error
> +--
> +s = box.schema.sequence.create('s')
> +s:drop()
> +s:next()
> +s:reset()
> +
>  --
>  -- Check that altering parts of a primary index with a sequence
>  -- attached requires sequence update. Renaming fields does not.
>