Rename `TransactionTimeout` to more descriptive `LockWaitTimeout` (#31223)

Since #31129, new error class `StatementTimeout` has been added.
`TransactionTimeout` is caused by the timeout shorter than
`StatementTimeout`, but its name is too generic. I think that it should
be a name that understands the difference with `StatementTimeout`.

3 files changed, 4 insertions, 4 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 0e552dba95..77ccac54bf 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -660,7 +660,7 @@ module ActiveRecord
           when ER_LOCK_DEADLOCK
             Deadlocked.new(message)
           when ER_LOCK_WAIT_TIMEOUT
-            TransactionTimeout.new(message)
+            LockWaitTimeout.new(message)
           when ER_QUERY_TIMEOUT
             StatementTimeout.new(message)
           else
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 1739c288b6..489feadb00 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -418,7 +418,7 @@ module ActiveRecord
           when DEADLOCK_DETECTED
             Deadlocked.new(message)
           when LOCK_NOT_AVAILABLE
-            TransactionTimeout.new(message)
+            LockWaitTimeout.new(message)
           when QUERY_CANCELED
             StatementTimeout.new(message)
           else
diff --git a/activerecord/lib/active_record/errors.rb b/activerecord/lib/active_record/errors.rb
index 7382879fce..89e777ffc3 100644
--- a/activerecord/lib/active_record/errors.rb
+++ b/activerecord/lib/active_record/errors.rb
@@ -335,8 +335,8 @@ module ActiveRecord
   class IrreversibleOrderError < ActiveRecordError
   end
 
-  # TransactionTimeout will be raised when lock wait timeout exceeded.
-  class TransactionTimeout < StatementInvalid
+  # LockWaitTimeout will be raised when lock wait timeout exceeded.
+  class LockWaitTimeout < StatementInvalid
   end
 
   # StatementTimeout will be raised when statement timeout exceeded.