本文整理汇总了C++中StoragePtr::drop方法的典型用法代码示例。如果您正苦于以下问题：C++ StoragePtr::drop方法的具体用法？C++ StoragePtr::drop怎么用？C++ StoragePtr::drop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::drop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: executeToTemporaryTable
BlockIO InterpreterDropQuery::executeToTemporaryTable(String & table_name, ASTDropQuery::Kind kind)
{
if (kind == ASTDropQuery::Kind::Detach)
throw Exception("Unable to detach temporary table.", ErrorCodes::SYNTAX_ERROR);
else
{
auto & context_handle = context.hasSessionContext() ? context.getSessionContext() : context;
StoragePtr table = context_handle.tryGetExternalTable(table_name);
if (table)
{
if (kind == ASTDropQuery::Kind::Truncate)
{
/// If table was already dropped by anyone, an exception will be thrown
auto table_lock = table->lockExclusively(context.getCurrentQueryId());
/// Drop table data, don't touch metadata
table->truncate(query_ptr, context);
}
else if (kind == ASTDropQuery::Kind::Drop)
{
context_handle.tryRemoveExternalTable(table_name);
table->shutdown();
/// If table was already dropped by anyone, an exception will be thrown
auto table_lock = table->lockExclusively(context.getCurrentQueryId());
/// Delete table data
table->drop();
table->is_dropped = true;
}
}
}
return {};
}