本文整理汇总了C++中StoragePtr::mutate方法的典型用法代码示例。如果您正苦于以下问题：C++ StoragePtr::mutate方法的具体用法？C++ StoragePtr::mutate怎么用？C++ StoragePtr::mutate使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类StoragePtr的用法示例。
在下文中一共展示了StoragePtr::mutate方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: execute
BlockIO InterpreterAlterQuery::execute()
{
auto & alter = typeid_cast<ASTAlterQuery &>(*query_ptr);
if (!alter.cluster.empty())
return executeDDLQueryOnCluster(query_ptr, context, {alter.table});
const String & table_name = alter.table;
String database_name = alter.database.empty() ? context.getCurrentDatabase() : alter.database;
StoragePtr table = context.getTable(database_name, table_name);
AlterCommands alter_commands;
PartitionCommands partition_commands;
MutationCommands mutation_commands;
parseAlter(alter.parameters, alter_commands, partition_commands, mutation_commands);
if (!mutation_commands.commands.empty())
{
mutation_commands.validate(*table, context);
table->mutate(mutation_commands, context);
}
partition_commands.validate(*table);
for (const PartitionCommand & command : partition_commands)
{
switch (command.type)
{
case PartitionCommand::DROP_PARTITION:
table->dropPartition(query_ptr, command.partition, command.detach, context);
break;
case PartitionCommand::ATTACH_PARTITION:
table->attachPartition(command.partition, command.part, context);
break;
case PartitionCommand::REPLACE_PARTITION:
{
String from_database = command.from_database.empty() ? context.getCurrentDatabase() : command.from_database;
auto from_storage = context.getTable(from_database, command.from_table);
table->replacePartitionFrom(from_storage, command.partition, command.replace, context);
}
break;
case PartitionCommand::FETCH_PARTITION:
table->fetchPartition(command.partition, command.from_zookeeper_path, context);
break;
case PartitionCommand::FREEZE_PARTITION:
table->freezePartition(command.partition, command.with_name, context);
break;
case PartitionCommand::CLEAR_COLUMN:
table->clearColumnInPartition(command.partition, command.column_name, context);
break;
}
}
if (!alter_commands.empty())
{
alter_commands.validate(*table, context);
table->alter(alter_commands, database_name, table_name, context);
}
return {};
}