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Source code repository git@github.com:tarantool/doc.git
Repository branch test-weblate
Weblate repository http://weblate.tarantool.io/git/testing_project/documentation-referencereference_luabox_ctlset_on_shutdown_timeout/
File mask locale/*/LC_MESSAGES/reference/reference_lua/box_ctl/on_schema_init.po
Translation file Download locale/ru/LC_MESSAGES/reference/reference_lua/box_ctl/on_schema_init.po
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Total 13 282 2,051
Translated 84% 11 88% 250 82% 1,702
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Failing checks 23% 3 1% 3 1% 28
Strings with suggestions 0% 0 0% 0 0% 0
Untranslated strings 15% 2 11% 32 17% 349
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New strings to translate

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

2 new strings to translate appeared to the translation. a year ago
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Resource update

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

File locale/ru/LC_MESSAGES/reference/reference_lua/box_ctl/on_schema_init.po was added. a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

function function_for_before_replace(old, new)
if old == nil and new ~= nil and new[3] == 'space_name' and new[4] ~= 'vinyl' then
return new:update{{'=', 4, 'vinyl'}}
end
end

box.ctl.on_schema_init(function()
box.space._space:before_replace(function_for_before_replace)
end)

box.cfg{replication='master_uri', ...}
 
a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

Suppose that, before the server is fully up and ready for connections, you want to make sure that the engine of space ``space_name`` is vinyl. So you want to make a trigger that will be activated when a tuple is inserted in the ``_space`` system space. In this case you could end up with a master that has space-name with ``engine='memtx'`` and a replica that has space_name with ``engine='vinyl'``, with the same contents.
Предположим, что до того, как сервер будет полностью готов к подключениям, вы хотите убедиться, что движком ``space_name`` является vinyl. Поэтому вы хотите сделать триггер, который будет активирован при вставке кортежа в системный спейс ``_space``. В этом случае может получиться мастер, который имеет space-name с ``engine='memtx'`` и реплику, которая имеет space_name с ``engine='vinyl'``, с тем же самым содержимым.
a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

**Example:**
**Пример:**
a year ago
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testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

Details about trigger characteristics are in the :ref:`triggers <triggers-box_triggers>` section.
Подробная информация о характеристиках триггера находится в разделе :ref:`Триггеры <triggers-box_triggers>`.
a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

A common use is: make a ``schema_init`` trigger function which creates a ``before_replace`` trigger function on a system space. Thus, since system spaces are created when the server starts, the ``before_replace`` triggers will be activated for each tuple in each system space. For example, such a trigger could change the storage engine of a given space, or make a given space :ref:`replica-local <replication-local>` while a replica is being bootstrapped. Making such a change after ``box.cfg`` is not reliable because other connections might use the database before the change is made.
Обычно используется следующее: сделать триггерную функцию ``schema_init``, которая создает триггерную функцию ``before_replace`` на системном спейсе. Таким образом, поскольку системные спейсы создаются при старте сервера, триггеры ``before_replace`` будут активированы для каждого кортежа в каждом системном спейсе. Например, такой триггер может изменить механизм хранения заданного спейса, или сделать заданный спейс :ref:`локальной репликой <replication-local>` во время загрузки реплики. Выполнение такого изменения после ``box.cfg`` не является надежным, поскольку другие подключения могут использовать базу данных до внесения изменения.
a year ago
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testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

If the parameters are (nil, old-trigger-function), then the old trigger is deleted.
Если указаны параметры (nil, old-trigger-function), старый триггер будет удален.
a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

nil or function pointer
nil или указатель функции
a year ago
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String updated in the repository

testing_project / Documentation: reference/reference_lua/box_ctl/on_schema_init — Russian

return
возвращает
a year ago
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