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81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
#include <Interpreters/Context.h>
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#include <Interpreters/executeDDLQueryOnCluster.h>
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#include <Interpreters/InterpreterUndropQuery.h>
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#include <Access/Common/AccessRightsElement.h>
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#include <Parsers/ASTUndropQuery.h>
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#include "config.h"
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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extern const int TABLE_ALREADY_EXISTS;
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extern const int SUPPORT_IS_DISABLED;
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}
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InterpreterUndropQuery::InterpreterUndropQuery(const ASTPtr & query_ptr_, ContextMutablePtr context_) : WithMutableContext(context_), query_ptr(query_ptr_)
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{
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}
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BlockIO InterpreterUndropQuery::execute()
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{
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if (!getContext()->getSettingsRef().allow_experimental_undrop_table_query)
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throw Exception(ErrorCodes::SUPPORT_IS_DISABLED,
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"Undrop table is experimental. "
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"Set `allow_experimental_undrop_table_query` setting to enable it");
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getContext()->checkAccess(AccessType::UNDROP_TABLE);
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auto & undrop = query_ptr->as<ASTUndropQuery &>();
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if (!undrop.cluster.empty() && !maybeRemoveOnCluster(query_ptr, getContext()))
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{
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DDLQueryOnClusterParams params;
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params.access_to_check = getRequiredAccessForDDLOnCluster();
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return executeDDLQueryOnCluster(query_ptr, getContext(), params);
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}
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if (undrop.table)
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return executeToTable(undrop);
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else
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Nothing to undrop, both names are empty");
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}
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BlockIO InterpreterUndropQuery::executeToTable(ASTUndropQuery & query)
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{
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auto table_id = StorageID(query);
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auto context = getContext();
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if (table_id.database_name.empty())
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{
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table_id.database_name = context->getCurrentDatabase();
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query.setDatabase(table_id.database_name);
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}
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auto guard = DatabaseCatalog::instance().getDDLGuard(table_id.database_name, table_id.table_name);
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auto database = DatabaseCatalog::instance().getDatabase(table_id.database_name);
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if (database->getEngineName() == "Replicated")
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throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "Replicated database does not support UNDROP query");
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if (database->isTableExist(table_id.table_name, getContext()))
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throw Exception(
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ErrorCodes::TABLE_ALREADY_EXISTS, "Cannot undrop table, {} already exists", table_id);
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database->checkMetadataFilenameAvailability(table_id.table_name);
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DatabaseCatalog::instance().dequeueDroppedTableCleanup(table_id);
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return {};
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}
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AccessRightsElements InterpreterUndropQuery::getRequiredAccessForDDLOnCluster() const
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{
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AccessRightsElements required_access;
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const auto & undrop = query_ptr->as<const ASTUndropQuery &>();
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required_access.emplace_back(AccessType::UNDROP_TABLE, undrop.getDatabase(), undrop.getTable());
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return required_access;
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}
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}
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