Gleb Natapov c42a91ec72 cql3: Extend the scope of group0_guard during DDL statement execution ...

Currently we hold group0_guard only during DDL statement's execute()
function, but unfortunately some statements access underlying schema
state also during check_access() and validate() calls which are called
by the query_processor before it calls execute. We need to cover those
calls with group0_guard as well and also move retry loop up. This patch
does it by introducing new function to cql_statement class take_guard().
Schema altering statements return group0 guard while others do not
return any guard. Query processor takes this guard at the beginning of a
statement execution and retries if service::group0_concurrent_modification
is thrown. The guard is passed to the execute in query_state structure.

Fixes: #13942
Message-Id: <ZJ2aeNIBQCtnTaE2@scylladb.com>

2023-07-05 14:38:34 +02:00

58 KiB

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