squash export mt part to obj storage

Author: arthurpassos

src/Common/CurrentMetrics.cpp

@@ -10,6 +10,7 @@
     M(Merge, "Number of executing background merges") \
     M(MergeParts, "Number of source parts participating in current background merges") \
     M(Move, "Number of currently executing moves") \
+    M(Export, "Number of currently executing exports") \
     M(PartMutation, "Number of mutations (ALTER DELETE/UPDATE)") \
     M(ReplicatedFetch, "Number of data parts being fetched from replica") \
     M(ReplicatedSend, "Number of data parts being sent to replicas") \

src/Databases/DatabaseS3.cpp

@@ -19,6 +19,7 @@
 #include <Storages/IStorage.h>
 #include <Storages/NamedCollectionsHelpers.h>
 #include <TableFunctions/TableFunctionFactory.h>
+#include <Parsers/ASTInsertQuery.h>
 
 #include <boost/algorithm/string.hpp>
 #include <filesystem>

src/Disks/ObjectStorages/IObjectStorage.h

@@ -96,6 +96,7 @@ struct RelativePathWithMetadata
     virtual ~RelativePathWithMetadata() = default;
 
     virtual std::string getFileName() const { return std::filesystem::path(relative_path).filename(); }
+    virtual std::string getFileNameWithoutExtension() const { return std::filesystem::path(relative_path).stem(); }
     virtual std::string getPath() const { return relative_path; }
     virtual bool isArchive() const { return false; }
     virtual std::string getPathToArchive() const { throw Exception(ErrorCodes::LOGICAL_ERROR, "Not an archive"); }

src/Interpreters/Context.cpp

@@ -463,6 +463,7 @@ struct ContextSharedPart : boost::noncopyable
     GlobalOvercommitTracker global_overcommit_tracker;
     MergeList merge_list;                                       /// The list of executable merge (for (Replicated)?MergeTree)
     MovesList moves_list;                                       /// The list of executing moves (for (Replicated)?MergeTree)
+    ExportsList exports_list;                                   /// The list of executing exports MergeTree -> Object storage
     ReplicatedFetchList replicated_fetch_list;
     RefreshSet refresh_set;                                 /// The list of active refreshes (for MaterializedView)
     ConfigurationPtr users_config TSA_GUARDED_BY(mutex);                              /// Config with the users, profiles and quotas sections.
@@ -1148,6 +1149,8 @@ MergeList & Context::getMergeList() { return shared->merge_list; }
 const MergeList & Context::getMergeList() const { return shared->merge_list; }
 MovesList & Context::getMovesList() { return shared->moves_list; }
 const MovesList & Context::getMovesList() const { return shared->moves_list; }
+ExportsList & Context::getExportsList() { return shared->exports_list; }
+const ExportsList & Context::getExportsList() const { return shared->exports_list; }
 ReplicatedFetchList & Context::getReplicatedFetchList() { return shared->replicated_fetch_list; }
 const ReplicatedFetchList & Context::getReplicatedFetchList() const { return shared->replicated_fetch_list; }
 RefreshSet & Context::getRefreshSet() { return shared->refresh_set; }

src/Interpreters/Context.h

@@ -32,6 +32,8 @@
 #include <mutex>
 #include <optional>
 
+#include "Storages/ExportsList.h"
+
 
 namespace Poco::Net
 {
@@ -1141,6 +1143,9 @@ class Context: public ContextData, public std::enable_shared_from_this<Context>
     MovesList & getMovesList();
     const MovesList & getMovesList() const;
 
+    ExportsList & getExportsList();
+    const ExportsList & getExportsList() const;
+
     ReplicatedFetchList & getReplicatedFetchList();
     const ReplicatedFetchList & getReplicatedFetchList() const;
 

src/Interpreters/InterpreterAlterQuery.cpp

@@ -502,6 +502,12 @@ AccessRightsElements InterpreterAlterQuery::getRequiredAccessForCommand(const AS
             required_access.emplace_back(AccessType::ALTER_DELETE | AccessType::INSERT, database, table);
             break;
         }
+        case ASTAlterCommand::EXPORT_PART:
+        {
+            required_access.emplace_back(AccessType::ALTER_MOVE_PARTITION, database, table);
+            required_access.emplace_back(AccessType::INSERT, command.to_database, command.to_table);
+            break;
+        }
         case ASTAlterCommand::FETCH_PARTITION:
         {
             required_access.emplace_back(AccessType::ALTER_FETCH_PARTITION, database, table);

src/Interpreters/PartLog.cpp

@@ -69,6 +69,7 @@ ColumnsDescription PartLogElement::getColumnsDescription()
             {"MovePart",      static_cast<Int8>(MOVE_PART)},
             {"MergePartsStart", static_cast<Int8>(MERGE_PARTS_START)},
             {"MutatePartStart", static_cast<Int8>(MUTATE_PART_START)},
+            {"ExportPart",      static_cast<Int8>(EXPORT_PART)},
         }
     );
 
@@ -109,7 +110,8 @@ ColumnsDescription PartLogElement::getColumnsDescription()
             "RemovePart — Removing or detaching a data part using [DETACH PARTITION](/sql-reference/statements/alter/partition#detach-partitionpart)."
             "MutatePartStart — Mutating of a data part has started, "
             "MutatePart — Mutating of a data part has finished, "
-            "MovePart — Moving the data part from the one disk to another one."},
+            "MovePart — Moving the data part from the one disk to another one."
+            "ExportPart — Exporting the data part from a merge tree table to one (e.g, object storage)."},
         {"merge_reason", std::move(merge_reason_datatype),
             "The reason for the event with type MERGE_PARTS. Can have one of the following values: "
             "NotAMerge — The current event has the type other than MERGE_PARTS, "

src/Interpreters/PartLog.h

@@ -30,6 +30,7 @@ struct PartLogElement
         MOVE_PART = 6,
         MERGE_PARTS_START = 7,
         MUTATE_PART_START = 8,
+        EXPORT_PART = 9,
     };
 
     /// Copy of MergeAlgorithm since values are written to disk.

src/Parsers/ASTAlterQuery.cpp

@@ -355,6 +355,29 @@ void ASTAlterCommand::formatImpl(WriteBuffer & ostr, const FormatSettings & sett
             ostr << quoteString(move_destination_name);
         }
     }
+    else if (type == ASTAlterCommand::EXPORT_PART)
+    {
+        ostr << (settings.hilite ? hilite_keyword : "") << "EXPORT " << (part ? "PART " : "PARTITION ")
+             << (settings.hilite ? hilite_none : "");
+        partition->format(ostr, settings, state, frame);
+        ostr << " TO ";
+        switch (move_destination_type)
+        {
+            case DataDestinationType::TABLE:
+                ostr << "TABLE ";
+                if (!to_database.empty())
+                {
+                    ostr << (settings.hilite ? hilite_identifier : "") << backQuoteIfNeed(to_database)
+                         << (settings.hilite ? hilite_none : "") << ".";
+                }
+                ostr << (settings.hilite ? hilite_identifier : "") << backQuoteIfNeed(to_table)
+                     << (settings.hilite ? hilite_none : "");
+                return;
+            default:
+                break;
+        }
+
+    }
     else if (type == ASTAlterCommand::REPLACE_PARTITION)
     {
         ostr << (settings.hilite ? hilite_keyword : "") << (replace ? "REPLACE" : "ATTACH") << " PARTITION "

src/Parsers/ASTAlterQuery.h

@@ -71,6 +71,7 @@ class ASTAlterCommand : public IAST
         FREEZE_ALL,
         UNFREEZE_PARTITION,
         UNFREEZE_ALL,
+        EXPORT_PART,
 
         DELETE,
         UPDATE,