YT-19324: move YT provider to ydb/library/yql

This commit is formed by the following script: https://paste.yandex-team.ru/6f92e4b8-efc5-4d34-948b-15ee2accd7e7/text.
This commit has zero effect on all projects that depend on YQL.

The summary of changes:
- `yql/providers/yt -> ydb/library/yql/providers/yt `- the whole implementation of YT provider is moved into YDB code base for further export as a part of YT YQL plugin shared library;
- `yql/providers/stat/{expr_nodes,uploader} -> ydb/library/yql/providers/stat/{expr_nodes,uploader}` - a small interface without implementation and the description of stat expr nodes;
- `yql/core/extract_predicate/ut -> ydb/library/yql/core/extract_predicate/ut`;
- `yql/core/{ut,ut_common} -> ydb/library/yql/core/{ut,ut_common}`;
- `yql/core` is gone;
- `yql/library/url_preprocessing -> ydb/library/yql/core/url_preprocessing`.

**NB**: all new targets inside `ydb/` are under `IF (NOT CMAKE_EXPORT)` clause which disables them from open-source cmake generation and ya make build. They will be enabled in the subsequent commits.

1 files changed, 290 insertions, 0 deletions

diff --git a/yt/cpp/mapreduce/interface/errors.h b/yt/cpp/mapreduce/interface/errors.h
new file mode 100644
index 00000000000..afad58ed723
--- /dev/null
+++ b/yt/cpp/mapreduce/interface/errors.h
@@ -0,0 +1,290 @@
+#pragma once
+
+///
+/// @file yt/cpp/mapreduce/interface/errors.h
+///
+/// Errors and exceptions emitted by library.
+
+#include "fwd.h"
+#include "common.h"
+
+#include <library/cpp/yson/node/node.h>
+
+#include <util/generic/bt_exception.h>
+#include <util/generic/yexception.h>
+#include <util/generic/string.h>
+#include <util/generic/vector.h>
+
+namespace NJson {
+    class TJsonValue;
+} // namespace NJson
+
+namespace NYT {
+
+////////////////////////////////////////////////////////////////////////////////
+
+///
+/// @brief Error that is thrown when library detects invalid usage of API.
+///
+/// For example trying to start operations on empty table list.
+class TApiUsageError
+    : public TWithBackTrace<yexception>
+{ };
+
+///
+/// @brief Error that is thrown when request retries continues for too long.
+///
+/// @see NYT::TRetryConfig
+/// @see NYT::IRetryConfigProvider
+class TRequestRetriesTimeout
+    : public yexception
+{ };
+
+////////////////////////////////////////////////////////////////////////////////
+
+///
+/// @brief Error returned by YT cluster.
+///
+/// An object of this class describe error that happened on YT server.
+/// Internally each error is a tree. Each node of the tree contains:
+///   - integer error code;
+///   - text description of error;
+///   - attributes describing error context.
+///
+/// To get text description of an error one should use
+/// @ref NYT::TYtError::ShortDescription or @ref NYT::TYtError::FullDescription
+///
+/// To distinguish between error kinds @ref NYT::TYtError::ContainsErrorCode should be used.
+///
+/// @see NYT::TErrorResponse
+/// @see NYT::TOperationFailedError
+class TYtError
+{
+public:
+    /// Constructs error with NYT::NClusterErrorCodes::OK code and empty message.
+    TYtError();
+
+    /// Constructs error with NYT::NClusterErrorCodes::Generic code and given message.
+    explicit TYtError(const TString& message);
+
+    /// Constructs error with given code and given message.
+    TYtError(int code, const TString& message);
+
+    /// Construct error from json representation.
+    TYtError(const ::NJson::TJsonValue& value);
+
+    /// Construct error from TNode representation.
+    TYtError(const TNode& value);
+
+    ///
+    /// @brief Check if error or any of inner errors has given error code.
+    ///
+    /// Use this method to distinguish kind of error.
+    bool ContainsErrorCode(int code) const;
+
+    ///
+    /// @brief Get short description of error.
+    ///
+    /// Short description contain text description of error and all inner errors.
+    /// It is human readable but misses some important information (error codes, error attributes).
+    ///
+    /// Usually it's better to use @ref NYT::TYtError::FullDescription to log errors.
+    TString ShortDescription() const;
+
+    ///
+    /// @brief Get full description of error.
+    ///
+    /// Full description contains readable short description
+    /// followed by text yson representation of error that contains error codes and attributes.
+    TString FullDescription() const;
+
+    ///
+    /// @brief Get error code of the topmost error.
+    ///
+    /// @warning Do not use this method to distinguish between error kinds
+    /// @ref NYT::TYtError::ContainsErrorCode should be used instead.
+    int GetCode() const;
+
+    ///
+    /// @brief Get error text of the topmost error.
+    ///
+    /// @warning This method should not be used to log errors
+    /// since text description of inner errors is going to be lost.
+    /// @ref NYT::TYtError::FullDescription should be used instead.
+    const TString& GetMessage() const;
+
+    ///
+    /// @brief Check if error or any of inner errors contains given text chunk.
+    ///
+    /// @warning @ref NYT::TYtError::ContainsErrorCode must be used instead of
+    /// this method when possible. If there is no suitable error code it's
+    /// better to ask yt@ to add one. This method should only be used as workaround.
+    bool ContainsText(const TStringBuf& text) const;
+
+    /// @brief Get inner errors.
+    const TVector<TYtError>& InnerErrors() const;
+
+    /// Parse error from json string.
+    void ParseFrom(const TString& jsonError);
+
+    /// Collect error codes from entire error tree.
+    TSet<int> GetAllErrorCodes() const;
+
+    /// Check if error has any attributes.
+    bool HasAttributes() const;
+
+    /// Get error attributes.
+    const TNode::TMapType& GetAttributes() const;
+
+    /// Get text yson representation of error
+    TString GetYsonText() const;
+
+private:
+    int Code_;
+    TString Message_;
+    TVector<TYtError> InnerErrors_;
+    TNode::TMapType Attributes_;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+///
+/// @brief Generic error response returned by server.
+///
+/// TErrorResponse can be thrown from almost any client method when server responds with error.
+///
+class TErrorResponse
+    : public yexception
+{
+public:
+    TErrorResponse(int httpCode, const TString& requestId);
+    TErrorResponse(int httpCode, TYtError error);
+
+    /// Get error object returned by server.
+    const TYtError& GetError() const;
+
+    /// Get if (correlation-id) of request that was responded with error.
+    TString GetRequestId() const;
+
+    /// Get HTTP code of response.
+    int GetHttpCode() const;
+
+    /// Is error parsed from response trailers.
+    bool IsFromTrailers() const;
+
+    /// Check if error was caused by transport problems inside YT cluster.
+    bool IsTransportError() const;
+
+    /// Check if error was caused by failure to resolve cypress path.
+    bool IsResolveError() const;
+
+    /// Check if error was caused by lack of permissions to execute request.
+    bool IsAccessDenied() const;
+
+    /// Check if error was caused by failure to lock object because of another transaction is holding lock.
+    bool IsConcurrentTransactionLockConflict() const;
+
+    /// Check if error was caused by request quota limit exceeding.
+    bool IsRequestRateLimitExceeded() const;
+
+    // YT can't serve request because it is overloaded.
+    bool IsRequestQueueSizeLimitExceeded() const;
+
+    /// Check if error was caused by failure to get chunk. Such errors are almost always temporary.
+    bool IsChunkUnavailable() const;
+
+    /// Check if error was caused by internal YT timeout.
+    bool IsRequestTimedOut() const;
+
+    /// Check if error was caused by trying to work with transaction that was finished or never existed.
+    bool IsNoSuchTransaction() const;
+
+    // User reached their limit of concurrently running operations.
+    bool IsConcurrentOperationsLimitReached() const;
+
+    /// @deprecated This method must not be used.
+    bool IsOk() const;
+
+    void SetRawError(const TString& message);
+    void SetError(TYtError error);
+    void ParseFromJsonError(const TString& jsonError);
+    void SetIsFromTrailers(bool isFromTrailers);
+
+private:
+    void Setup();
+
+private:
+    int HttpCode_;
+    TString RequestId_;
+    TYtError Error_;
+    bool IsFromTrailers_ = false;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+/// Info about failed jobs.
+///
+/// @see NYT::TOperationFailedError
+struct TFailedJobInfo
+{
+    /// Id of a job.
+    TJobId JobId;
+
+    /// Error describing job failure.
+    TYtError Error;
+
+    /// Stderr of job.
+    ///
+    /// @note YT doesn't store all job stderrs, check @ref NYT::IOperationClient::GetJobStderr
+    /// for list of limitations.
+    ///
+    /// @see NYT::IOperationClient::GetJobStderr
+    TString Stderr;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+///
+/// @brief Error that is thrown when operation watched by library fails.
+///
+/// This error is thrown from operation starting methods when they are started in sync mode (@ refNYT::TOperationOptions::Wait == true)
+/// or from future returned by NYT::IOperation::Watch.
+///
+/// @see NYT::IOperationClient
+class TOperationFailedError
+    : public yexception
+{
+public:
+    /// Final state of operation.
+    enum EState {
+        /// Operation was failed due to some error.
+        Failed,
+        /// Operation didn't experienced errors, but was aborted by user request or by YT.
+        Aborted,
+    };
+
+public:
+    TOperationFailedError(EState state, TOperationId id, TYtError ytError, TVector<TFailedJobInfo> failedJobInfo);
+
+    /// Get final state of operation.
+    EState GetState() const;
+
+    /// Get operation id.
+    TOperationId GetOperationId() const;
+
+    /// Return operation error.
+    const TYtError& GetError() const;
+
+    /// Return info about failed jobs (if any).
+    const TVector<TFailedJobInfo>& GetFailedJobInfo() const;
+
+private:
+    EState State_;
+    TOperationId OperationId_;
+    TYtError Error_;
+    TVector<TFailedJobInfo> FailedJobInfo_;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT