Method executeDropQuery

src/Interpreters/InterpreterDropQuery.cpp:496–524

}

void InterpreterDropQuery::executeDropQuery(ASTDropQuery::Kind kind, ContextPtr global_context, ContextPtr current_context, const StorageID & target_table_id, bool no_delay)
{
    if (DatabaseCatalog::instance().tryGetTable(target_table_id, current_context))
    {
        /// We create and execute `drop` query for internal table.
        auto drop_query = std::make_shared<ASTDropQuery>();
        drop_query->database = target_table_id.database_name;
        drop_query->table = target_table_id.table_name;
        drop_query->kind = kind;
        drop_query->no_delay = no_delay;
        drop_query->if_exists = true;
        ASTPtr ast_drop_query = drop_query;
        /// FIXME We have to use global context to execute DROP query for inner table
        /// to avoid "Not enough privileges" error if current user has only DROP VIEW ON mat_view_name privilege
        /// and not allowed to drop inner table explicitly. Allowing to drop inner table without explicit grant
        /// looks like expected behaviour and we have tests for it.
        auto drop_context = Context::createCopy(global_context);
        drop_context->getClientInfo().query_kind = ClientInfo::QueryKind::SECONDARY_QUERY;
        if (auto txn = current_context->getZooKeeperMetadataTransaction())
        {
            /// For Replicated database
            drop_context->getClientInfo().is_replicated_database_internal = true;
            drop_context->setQueryContext(std::const_pointer_cast<Context>(current_context));
            drop_context->initZooKeeperMetadataTransaction(txn, true);
        }
        InterpreterDropQuery drop_interpreter(ast_drop_query, drop_context);
        drop_interpreter.execute();
    }
}

}