[tarantool-patches] Re: [PATCH v2 4/9] box: fix on_replace_trigger_rollback routine

["n.pettik" <korablev@tarantool.org>]

This patch LGTM. Since it is barely related to check constraints,
I suggest to consider it as independent.

> The function on_replace_trigger_rollback in the case of a replace
> operation rollback was called with an incorrect argument, as a
> result of which the used memory was freed.
> ---
> src/box/alter.cc         |  3 ++-
> test/sql/errinj.result   | 24 ++++++++++++++++++++++++
> test/sql/errinj.test.lua |  7 +++++++
> 3 files changed, 33 insertions(+), 1 deletion(-)
> 
> diff --git a/src/box/alter.cc b/src/box/alter.cc
> index ab3dd2e22..eff3524cf 100644
> --- a/src/box/alter.cc
> +++ b/src/box/alter.cc
> @@ -3591,7 +3591,8 @@ on_replace_dd_trigger(struct trigger * /* trigger */, void *event)
> 			diag_raise();
> 
> 		on_commit->data = old_trigger;
> -		on_rollback->data = new_trigger;
> +		on_rollback->data =
> +			old_tuple == NULL ? new_trigger : old_trigger;
> 		new_trigger_guard.is_active = false;
> 	}
> 
> diff --git a/test/sql/errinj.result b/test/sql/errinj.result
> index c423c8bc6..acce52e8a 100644
> --- a/test/sql/errinj.result
> +++ b/test/sql/errinj.result
> @@ -205,6 +205,30 @@ box.error.injection.set("ERRINJ_WAL_IO", true)
> ---
> - ok
> ...
> +t = box.space._trigger:get('T1T')
> +---
> +...
> +t_new = t:totable()
> +---
> +...
> +t_new[3]['sql'] = 'CREATE TRIGGER t1t INSERT ON t1 BEGIN INSERT INTO t2 VALUES (2, 2); END;'
> +---
> +...
> +_ = box.space._trigger:replace(t, t_new)
> +---
> +- error: Failed to write to disk
> +...
> +box.error.injection.set("ERRINJ_WAL_IO", false)
> +---
> +- ok
> +...
> +_ = box.space._trigger:replace(t, t_new)
> +---
> +...
> +box.error.injection.set("ERRINJ_WAL_IO", true)
> +---
> +- ok
> +...
> box.sql.execute("DROP TRIGGER t1t;")
> ---
> - error: Failed to write to disk
> diff --git a/test/sql/errinj.test.lua b/test/sql/errinj.test.lua
> index 8378c255c..fc19c859b 100644
> --- a/test/sql/errinj.test.lua
> +++ b/test/sql/errinj.test.lua
> @@ -75,6 +75,13 @@ box.sql.execute("INSERT INTO t1 VALUES (3, 3);")
> box.sql.execute("SELECT * from t1");
> box.sql.execute("SELECT * from t2");
> box.error.injection.set("ERRINJ_WAL_IO", true)
> +t = box.space._trigger:get('T1T')
> +t_new = t:totable()
> +t_new[3]['sql'] = 'CREATE TRIGGER t1t INSERT ON t1 BEGIN INSERT INTO t2 VALUES (2, 2); END;'
> +_ = box.space._trigger:replace(t, t_new)
> +box.error.injection.set("ERRINJ_WAL_IO", false)
> +_ = box.space._trigger:replace(t, t_new)
> +box.error.injection.set("ERRINJ_WAL_IO", true)
> box.sql.execute("DROP TRIGGER t1t;")
> box.error.injection.set("ERRINJ_WAL_IO", false)
> box.sql.execute("DELETE FROM t1;")
> -- 
> 2.19.2
>