vterrors

package
v0.20.2 Latest Latest
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 Go to latest Published: Sep 11, 2024 License: Apache-2.0, BSD-2-Clause Imports: 16 Imported by: 63

Documentation

Overview

Package vterrors provides simple error handling primitives for Vitess

In all Vitess code, errors should be propagated using vterrors.Wrapf() and not fmt.Errorf(). This makes sure that stacktraces are kept and propagated correctly.

New errors should be created using vterrors.New or vterrors.Errorf

Vitess uses canonical error codes for error reporting. This is based on years of industry experience with error reporting. This idea is that errors should be classified into a small set of errors (10 or so) with very specific meaning. Each error has a code, and a message. When errors are passed around (even through RPCs), the code is propagated. To handle errors, only the code should be looked at (and not string-matching on the error message).

Error codes are defined in /proto/vtrpc.proto. Along with an RPCError message that can be used to transmit errors through RPCs, in the message payloads. These codes match the names and numbers defined by gRPC.

A standardized error implementation that allows you to build an error with an associated canonical code is also defined. While sending an error through gRPC, these codes are transmitted using gRPC's error propagation mechanism and decoded back to the original code on the other end.

Retrieving the cause of an error

Using vterrors.Wrap constructs a stack of errors, adding context to the preceding error, instead of simply building up a string. Depending on the nature of the error it may be necessary to reverse the operation of errors.Wrap to retrieve the original error for inspection. Any error value which implements this interface 

type causer interface {
        Cause() error
}

can be inspected by vterrors.Cause and vterrors.RootCause.

  • vterrors.Cause will find the immediate cause if one is available, or nil if the error is not a `causer` or if no cause is available.

  • vterrors.RootCause will recursively retrieve the topmost error which does not implement causer, which is assumed to be the original cause. For example:

    switch err := errors.RootCause(err).(type) { case *MyError: // handle specifically default: // unknown error }

causer interface is not exported by this package, but is considered a part of stable public API.

Formatted printing of errors

All error values returned from this package implement fmt.Formatter and can be formatted by the fmt package. The following verbs are supported 

%s    print the error. If the error has a Cause it will be
      printed recursively
%v    extended format. Each Frame of the error's StackTrace will
      be printed in detail.

Most but not all of the code in this file was originally copied from https://github.com/pkg/errors/blob/v0.8.0/errors.go

Index

Constants

View Source 
const (
	// Informational errors.
	PriorityOK = iota
	PriorityCanceled
	PriorityAlreadyExists
	PriorityOutOfRange
	// Potentially retryable errors.
	PriorityUnavailable
	PriorityDeadlineExceeded
	PriorityAborted
	PriorityFailedPrecondition
	PriorityClusterEvent
	// Permanent errors.
	PriorityResourceExhausted
	PriorityUnknown
	PriorityUnauthenticated
	PriorityPermissionDenied
	PriorityInvalidArgument
	PriorityNotFound
	PriorityUnimplemented
	// Serious errors.
	PriorityInternal
	PriorityDataLoss
)

A list of all vtrpcpb.Code, ordered by priority. These priorities are used when aggregating multiple errors in VtGate. Higher priority error codes are more urgent for users to see. They are prioritized based on the following question: assuming a scatter query produced multiple errors, which of the errors is the most likely to give the user useful information about why the query failed and how they should proceed?

View Source 
const (
	NotServing   = "operation not allowed in state NOT_SERVING"
	ShuttingDown = "operation not allowed in state SHUTTING_DOWN"
)

Operation not allowed error

View Source 
const (
	// PrimaryVindexNotSet is the error message to be used when there is no primary vindex found on a table
	PrimaryVindexNotSet = "table '%s' does not have a primary vindex"
)

Constants for error messages

View Source 
const TxEngineClosed = "tx engine can't accept new connections in state %v"

TxEngineClosed for transaction engine closed error

View Source 
const TxKillerRollback = "in use: for tx killer rollback"

TxKillerRollback purpose when acquire lock on connection for rolling back transaction.

View Source 
const WrongTablet = "wrong tablet type"

WrongTablet for invalid tablet type error

Variables

View Source 
var (
	VT03001 = errorWithState("VT03001", vtrpcpb.Code_INVALID_ARGUMENT, SyntaxError, "aggregate functions take a single argument '%s'", "This aggregation function only takes a single argument.")
	VT03002 = errorWithState("VT03002", vtrpcpb.Code_INVALID_ARGUMENT, ForbidSchemaChange, "changing schema from '%s' to '%s' is not allowed", "This schema change is not allowed. You cannot change the keyspace of a table.")
	VT03003 = errorWithState("VT03003", vtrpcpb.Code_INVALID_ARGUMENT, UnknownTable, "unknown table '%s' in MULTI DELETE", "The specified table in this DELETE statement is unknown.")
	VT03004 = errorWithState("VT03004", vtrpcpb.Code_INVALID_ARGUMENT, NonUpdateableTable, "the target table %s of the DELETE is not updatable", "You cannot delete something that is not a real MySQL table.")
	VT03005 = errorWithState("VT03005", vtrpcpb.Code_INVALID_ARGUMENT, WrongGroupField, "cannot group on '%s'", "The planner does not allow grouping on certain field. For instance, aggregation function.")
	VT03006 = errorWithState("VT03006", vtrpcpb.Code_INVALID_ARGUMENT, WrongValueCountOnRow, "column count does not match value count with the row", "The number of columns you want to insert do not match the number of columns of your SELECT query.")
	VT03007 = errorWithoutState("VT03007", vtrpcpb.Code_INVALID_ARGUMENT, "keyspace not specified", "You need to add a keyspace qualifier.")
	VT03008 = errorWithState("VT03008", vtrpcpb.Code_INVALID_ARGUMENT, CantUseOptionHere, "incorrect usage/placement of '%s'", "The given token is not usable in this situation. Please refer to the MySQL documentation to learn more about your token's syntax.")
	VT03009 = errorWithState("VT03009", vtrpcpb.Code_INVALID_ARGUMENT, WrongValueForVar, "unexpected value type for '%s': %v", "You cannot assign this type to the given variable.")
	VT03010 = errorWithState("VT03010", vtrpcpb.Code_INVALID_ARGUMENT, IncorrectGlobalLocalVar, "variable '%s' is a read only variable", "You cannot set the given variable as it is a read-only variable.")
	VT03011 = errorWithoutState("VT03011", vtrpcpb.Code_INVALID_ARGUMENT, "invalid value type: %v", "The given value type is not accepted.")
	VT03012 = errorWithoutState("VT03012", vtrpcpb.Code_INVALID_ARGUMENT, "invalid syntax: %s", "The syntax is invalid. Please refer to the MySQL documentation for the proper syntax.")
	VT03013 = errorWithState("VT03013", vtrpcpb.Code_INVALID_ARGUMENT, NonUniqTable, "not unique table/alias: '%s'", "This table or alias name is already use. Please use another one that is unique.")
	VT03014 = errorWithState("VT03014", vtrpcpb.Code_INVALID_ARGUMENT, BadFieldError, "unknown column '%s' in '%s'", "The given column is unknown.")
	VT03015 = errorWithoutState("VT03015", vtrpcpb.Code_INVALID_ARGUMENT, "column has duplicate set values: '%v'", "Cannot assign multiple values to a column in an update statement.")
	VT03016 = errorWithoutState("VT03016", vtrpcpb.Code_INVALID_ARGUMENT, "unknown vindex column: '%s'", "The given column is unknown in the vindex table.")
	VT03017 = errorWithState("VT03017", vtrpcpb.Code_INVALID_ARGUMENT, SyntaxError, "where clause can only be of the type 'pos > <value>'", "This vstream where clause can only be a greater than filter.")
	VT03018 = errorWithoutState("VT03018", vtrpcpb.Code_INVALID_ARGUMENT, "NEXT used on a non-sequence table", "You cannot use the NEXT syntax on a table that is not a sequence table.")
	VT03019 = errorWithoutState("VT03019", vtrpcpb.Code_INVALID_ARGUMENT, "column %s not found", "The given column was not found or is not available.")
	VT03020 = errorWithoutState("VT03020", vtrpcpb.Code_INVALID_ARGUMENT, "column %s not found in subquery", "The given column was not found in the subquery.")
	VT03021 = errorWithoutState("VT03021", vtrpcpb.Code_INVALID_ARGUMENT, "ambiguous column reference: %v", "The given column is ambiguous. You can use a table qualifier to make it unambiguous.")
	VT03022 = errorWithoutState("VT03022", vtrpcpb.Code_INVALID_ARGUMENT, "column %v not found in %v", "The given column cannot be found.")
	VT03023 = errorWithoutState("VT03023", vtrpcpb.Code_INVALID_ARGUMENT, "INSERT not supported when targeting a key range: %s", "When targeting a range of shards, Vitess does not know which shard to send the INSERT to.")
	VT03024 = errorWithoutState("VT03024", vtrpcpb.Code_INVALID_ARGUMENT, "'%s' user defined variable does not exists", "The query cannot be prepared using the user defined variable as it does not exists for this session.")
	VT03025 = errorWithState("VT03025", vtrpcpb.Code_INVALID_ARGUMENT, WrongArguments, "Incorrect arguments to %s", "The execute statement have wrong number of arguments")
	VT03026 = errorWithoutState("VT03024", vtrpcpb.Code_INVALID_ARGUMENT, "'%s' bind variable does not exists", "The query cannot be executed as missing the bind variable.")
	VT03027 = errorWithState("VT03027", vtrpcpb.Code_INVALID_ARGUMENT, BadNullError, "Column '%s' cannot be null", "The column cannot have null value.")
	VT03028 = errorWithState("VT03028", vtrpcpb.Code_INVALID_ARGUMENT, BadNullError, "Column '%s' cannot be null on row %d, col %d", "The column cannot have null value.")
	VT03029 = errorWithState("VT03029", vtrpcpb.Code_INVALID_ARGUMENT, WrongValueCountOnRow, "column count does not match value count with the row for vindex '%s'", "The number of columns you want to insert do not match the number of columns of your SELECT query.")
	VT03030 = errorWithState("VT03030", vtrpcpb.Code_INVALID_ARGUMENT, WrongValueCountOnRow, "lookup column count does not match value count with the row (columns, count): (%v, %d)", "The number of columns you want to insert do not match the number of columns of your SELECT query.")
	VT03031 = errorWithoutState("VT03031", vtrpcpb.Code_INVALID_ARGUMENT, "EXPLAIN is only supported for single keyspace", "EXPLAIN has to be sent down as a single query to the underlying MySQL, and this is not possible if it uses tables from multiple keyspaces")
	VT03032 = errorWithState("VT03032", vtrpcpb.Code_INVALID_ARGUMENT, NonUpdateableTable, "the target table %s of the UPDATE is not updatable", "You cannot update a table that is not a real MySQL table.")
	VT03033 = errorWithState("VT03033", vtrpcpb.Code_INVALID_ARGUMENT, ViewWrongList, "In definition of view, derived table or common table expression, SELECT list and column names list have different column counts", "The table column list and derived column list have different column counts.")

	VT05001 = errorWithState("VT05001", vtrpcpb.Code_NOT_FOUND, DbDropExists, "cannot drop database '%s'; database does not exists", "The given database does not exist; Vitess cannot drop it.")
	VT05002 = errorWithState("VT05002", vtrpcpb.Code_NOT_FOUND, BadDb, "cannot alter database '%s'; unknown database", "The given database does not exist; Vitess cannot alter it.")
	VT05003 = errorWithState("VT05003", vtrpcpb.Code_NOT_FOUND, BadDb, "unknown database '%s' in vschema", "The given database does not exist in the VSchema.")
	VT05004 = errorWithState("VT05004", vtrpcpb.Code_NOT_FOUND, UnknownTable, "table '%s' does not exist", "The given table is unknown.")
	VT05005 = errorWithState("VT05005", vtrpcpb.Code_NOT_FOUND, NoSuchTable, "table '%s' does not exist in keyspace '%s'", "The given table does not exist in this keyspace.")
	VT05006 = errorWithState("VT05006", vtrpcpb.Code_NOT_FOUND, UnknownSystemVariable, "unknown system variable '%s'", "The given system variable is unknown.")
	VT05007 = errorWithoutState("VT05007", vtrpcpb.Code_NOT_FOUND, "no table info", "Table information is not available.")

	VT06001 = errorWithState("VT06001", vtrpcpb.Code_ALREADY_EXISTS, DbCreateExists, "cannot create database '%s'; database exists", "The given database name already exists.")

	VT07001 = errorWithState("VT07001", vtrpcpb.Code_PERMISSION_DENIED, KillDeniedError, "%s", "Kill statement is not allowed. More in docs about how to enable it and its limitations.")

	VT09001 = errorWithState("VT09001", vtrpcpb.Code_FAILED_PRECONDITION, RequiresPrimaryKey, PrimaryVindexNotSet, "the table does not have a primary vindex, the operation is impossible.")
	VT09002 = errorWithState("VT09002", vtrpcpb.Code_FAILED_PRECONDITION, InnodbReadOnly, "%s statement with a replica target", "This type of DML statement is not allowed on a replica target.")
	VT09003 = errorWithoutState("VT09003", vtrpcpb.Code_FAILED_PRECONDITION, "INSERT query does not have primary vindex column '%v' in the column list", "A vindex column is mandatory for the insert, please provide one.")
	VT09004 = errorWithoutState("VT09004", vtrpcpb.Code_FAILED_PRECONDITION, "INSERT should contain column list or the table should have authoritative columns in vschema", "You need to provide the list of columns you want to insert, or provide a VSchema with authoritative columns. If schema tracking is disabled you can enable it to automatically have authoritative columns.")
	VT09005 = errorWithState("VT09005", vtrpcpb.Code_FAILED_PRECONDITION, NoDB, "no database selected: use keyspace<:shard><@type> or keyspace<[range]><@type> (<> are optional)", "A database must be selected.")
	VT09006 = errorWithoutState("VT09006", vtrpcpb.Code_FAILED_PRECONDITION, "%s VITESS_MIGRATION works only on primary tablet", "VITESS_MIGRATION commands work only on primary tablets, you must send such commands to a primary tablet.")
	VT09007 = errorWithoutState("VT09007", vtrpcpb.Code_FAILED_PRECONDITION, "%s VITESS_THROTTLED_APPS works only on primary tablet", "VITESS_THROTTLED_APPS commands work only on primary tablet, you must send such commands to a primary tablet.")
	VT09008 = errorWithoutState("VT09008", vtrpcpb.Code_FAILED_PRECONDITION, "vexplain queries/all will actually run queries", "vexplain queries/all will actually run queries. `/*vt+ EXECUTE_DML_QUERIES */` must be set to run DML queries in vtexplain. Example: `vexplain /*vt+ EXECUTE_DML_QUERIES */ queries delete from t1`")
	VT09009 = errorWithoutState("VT09009", vtrpcpb.Code_FAILED_PRECONDITION, "stream is supported only for primary tablet type, current type: %v", "Stream is only supported for primary tablets, please use a stream on those tablets.")
	VT09010 = errorWithoutState("VT09010", vtrpcpb.Code_FAILED_PRECONDITION, "SHOW VITESS_THROTTLER STATUS works only on primary tablet", "SHOW VITESS_THROTTLER STATUS works only on primary tablet.")
	VT09011 = errorWithState("VT09011", vtrpcpb.Code_FAILED_PRECONDITION, UnknownStmtHandler, "Unknown prepared statement handler (%s) given to %s", "The prepared statement is not available")
	VT09012 = errorWithoutState("VT09012", vtrpcpb.Code_FAILED_PRECONDITION, "%s statement with %s tablet not allowed", "This type of statement is not allowed on the given tablet.")
	VT09013 = errorWithoutState("VT09013", vtrpcpb.Code_FAILED_PRECONDITION, "semi-sync plugins are not loaded", "Durability policy wants Vitess to use semi-sync, but the MySQL instances don't have the semi-sync plugin loaded.")
	VT09014 = errorWithoutState("VT09014", vtrpcpb.Code_FAILED_PRECONDITION, "vindex cannot be modified", "The vindex cannot be used as table in DML statement")
	VT09015 = errorWithoutState("VT09015", vtrpcpb.Code_FAILED_PRECONDITION, "schema tracking required", "This query cannot be planned without more information on the SQL schema. Please turn on schema tracking or add authoritative columns information to your VSchema.")
	VT09016 = errorWithState("VT09016", vtrpcpb.Code_FAILED_PRECONDITION, RowIsReferenced2, "Cannot delete or update a parent row: a foreign key constraint fails", "SET DEFAULT is not supported by InnoDB")
	VT09017 = errorWithoutState("VT09017", vtrpcpb.Code_FAILED_PRECONDITION, "%s", "Invalid syntax for the statement type.")
	VT09018 = errorWithoutState("VT09018", vtrpcpb.Code_FAILED_PRECONDITION, "%s", "Invalid syntax for the vindex function statement.")
	VT09019 = errorWithoutState("VT09019", vtrpcpb.Code_FAILED_PRECONDITION, "keyspace '%s' has cyclic foreign keys. Cycle exists between %v", "Vitess doesn't support cyclic foreign keys.")
	VT09020 = errorWithoutState("VT09020", vtrpcpb.Code_FAILED_PRECONDITION, "can not use multiple vindex hints for table %s", "Vitess does not allow using multiple vindex hints on the same table.")
	VT09021 = errorWithState("VT09021", vtrpcpb.Code_FAILED_PRECONDITION, KeyDoesNotExist, "Vindex '%s' does not exist in table '%s'", "Vindex hints have to reference an existing vindex, and no such vindex could be found for the given table.")
	VT09022 = errorWithoutState("VT09022", vtrpcpb.Code_FAILED_PRECONDITION, "Destination does not have exactly one shard: %v", "Cannot send query to multiple shards.")
	VT09023 = errorWithoutState("VT09023", vtrpcpb.Code_FAILED_PRECONDITION, "could not map %v to a keyspace id", "Unable to determine the shard for the given row.")
	VT09024 = errorWithoutState("VT09024", vtrpcpb.Code_FAILED_PRECONDITION, "could not map %v to a unique keyspace id: %v", "Unable to determine the shard for the given row.")

	VT10001 = errorWithoutState("VT10001", vtrpcpb.Code_ABORTED, "foreign key constraints are not allowed", "Foreign key constraints are not allowed, see https://vitess.io/blog/2021-06-15-online-ddl-why-no-fk/.")

	VT12001 = errorWithoutState("VT12001", vtrpcpb.Code_UNIMPLEMENTED, "unsupported: %s", "This statement is unsupported by Vitess. Please rewrite your query to use supported syntax.")
	VT12002 = errorWithoutState("VT12002", vtrpcpb.Code_UNIMPLEMENTED, "unsupported: cross-shard foreign keys", "Vitess does not support cross shard foreign keys.")

	// VT13001 General Error
	VT13001 = errorWithoutState("VT13001", vtrpcpb.Code_INTERNAL, "[BUG] %s", "This error should not happen and is a bug. Please file an issue on GitHub: https://github.com/vitessio/vitess/issues/new/choose.")
	VT13002 = errorWithoutState("VT13002", vtrpcpb.Code_INTERNAL, "unexpected AST struct for query: %s", "This error should not happen and is a bug. Please file an issue on GitHub: https://github.com/vitessio/vitess/issues/new/choose.")

	VT14001 = errorWithoutState("VT14001", vtrpcpb.Code_UNAVAILABLE, "connection error", "The connection failed.")
	VT14002 = errorWithoutState("VT14002", vtrpcpb.Code_UNAVAILABLE, "no available connection", "No available connection.")
	VT14003 = errorWithoutState("VT14003", vtrpcpb.Code_UNAVAILABLE, "no connection for tablet %v", "No connection for the given tablet.")
	VT14004 = errorWithoutState("VT14004", vtrpcpb.Code_UNAVAILABLE, "cannot find keyspace for: %s", "The specified keyspace could not be found.")
	VT14005 = errorWithoutState("VT14005", vtrpcpb.Code_UNAVAILABLE, "cannot lookup sidecar database for keyspace: %s", "Failed to read sidecar database identifier.")

	// Errors is a list of errors that must match all the variables
	// defined above to enable auto-documentation of error codes.
	Errors = []func(args ...any) *VitessError{
		VT03001,
		VT03002,
		VT03003,
		VT03004,
		VT03005,
		VT03006,
		VT03007,
		VT03008,
		VT03009,
		VT03010,
		VT03011,
		VT03012,
		VT03013,
		VT03014,
		VT03015,
		VT03016,
		VT03017,
		VT03018,
		VT03019,
		VT03020,
		VT03021,
		VT03022,
		VT03023,
		VT03024,
		VT03025,
		VT03026,
		VT03027,
		VT03028,
		VT03029,
		VT03030,
		VT03031,
		VT03032,
		VT03033,
		VT05001,
		VT05002,
		VT05003,
		VT05004,
		VT05005,
		VT05006,
		VT05007,
		VT06001,
		VT07001,
		VT09001,
		VT09002,
		VT09003,
		VT09004,
		VT09005,
		VT09006,
		VT09007,
		VT09008,
		VT09009,
		VT09010,
		VT09011,
		VT09012,
		VT09013,
		VT09014,
		VT09015,
		VT09016,
		VT09017,
		VT09018,
		VT09019,
		VT09020,
		VT09021,
		VT09022,
		VT09023,
		VT09024,
		VT10001,
		VT12001,
		VT12002,
		VT13001,
		VT13002,
		VT14001,
		VT14002,
		VT14003,
		VT14004,
		VT14005,
	}
)
View Source 
var RxOp = regexp.MustCompile("operation not allowed in state (NOT_SERVING|SHUTTING_DOWN)")

RxOp regex for operation not allowed error

View Source 
var RxWrongTablet = regexp.MustCompile("(wrong|invalid) tablet type")

RxWrongTablet regex for invalid tablet type error

View Source 
var TxClosed = regexp.MustCompile("transaction ([a-z0-9:]+) (?:ended|not found|in use: for tx killer rollback)")

TxClosed regex for connection closed

Functions

func Aggregate 

func Aggregate(errors []error) error

Aggregate aggregates several errors into a single one. The resulting error code will be the one with the highest priority as defined by the priority constants in this package.

func Cause 

func Cause(err error) error

Cause will return the immediate cause, if possible. An error value has a cause if it implements the following interface: 

type causer interface {
       Cause() error
}

If the error does not implement Cause, nil will be returned

func Code 

func Code(err error) vtrpcpb.Code

Code returns the error code if it's a vtError. If err is nil, it returns ok.

func Equals 

func Equals(a, b error) bool

Equals returns true iff the error message and the code returned by Code() are equal.

func Errorf 

func Errorf(code vtrpcpb.Code, format string, args ...any) error

Errorf formats according to a format specifier and returns the string as a value that satisfies error. Errorf also records the stack trace at the point it was called. Use this for Vitess-specific errors that don't have a MySQL counterpart

func FromGRPC 

func FromGRPC(err error) error

FromGRPC returns a gRPC error as a vtError, translating between error codes. However, there are a few errors which are not translated and passed as they are. For example, io.EOF since our code base checks for this error to find out that a stream has finished.

func FromVTRPC 

func FromVTRPC(rpcErr *vtrpcpb.RPCError) error

FromVTRPC recovers a vtError from a *vtrpcpb.RPCError (which is how vtError is transmitted across proto3 RPC boundaries).

func New 

func New(code vtrpcpb.Code, message string) error

New returns an error with the supplied message. New also records the stack trace at the point it was called.

func NewErrorf added in v0.10.0 

func NewErrorf(code vtrpcpb.Code, state State, format string, args ...any) error

NewErrorf formats according to a format specifier and returns the string as a value that satisfies error. NewErrorf also records the stack trace at the point it was called. Use this for errors in Vitess that we eventually want to mimic as a MySQL error

func Print 

func Print(err error) string

Print is meant to print the vtError object in test failures. For comparing two vterrors, use Equals() instead.

func RegisterFlags added in v0.15.0 

func RegisterFlags(fs *pflag.FlagSet)

RegisterFlags registers the command-line options that control vterror behavior on the provided FlagSet.

func RootCause 

func RootCause(err error) error

RootCause returns the underlying cause of the error, if possible. An error value has a cause if it implements the following interface: 

type causer interface {
       Cause() error
}

If the error does not implement Cause, the original error will be returned. If the error is nil, nil will be returned without further investigation.

func ToGRPC 

func ToGRPC(err error) error

ToGRPC returns an error as a gRPC error, with the appropriate error code.

func ToVTRPC 

func ToVTRPC(err error) *vtrpcpb.RPCError

ToVTRPC converts from vtError to a vtrpcpb.RPCError.

func TruncateError added in v0.17.0 

func TruncateError(oldErr error, max int) error

TruncateError truncates error messages that are longer than the specified length.

func Unwrap added in v0.16.0 

func Unwrap(err error) (wasWrapped bool, unwrapped error)

Unwrap attempts to return the Cause of the given error, if it is indeed the result of a vterrors.Wrapf() The function indicates whether the error was indeed wrapped. If the error was not wrapped, the function returns the original error.

func UnwrapAll added in v0.16.0 

func UnwrapAll(err error) error

UnwrapAll attempts to recursively unwrap the given error, and returns the most underlying cause

func Wrap 

func Wrap(err error, message string) error

Wrap returns an error annotating err with a stack trace at the point Wrap is called, and the supplied message. If err is nil, Wrap returns nil.

func Wrapf 

func Wrapf(err error, format string, args ...any) error

Wrapf returns an error annotating err with a stack trace at the point Wrapf is call, and the format specifier. If err is nil, Wrapf returns nil.

Types

type ErrorWithCode added in v0.16.0 

type ErrorWithCode interface {
	ErrorCode() vtrpcpb.Code
}

ErrorWithCode returns the grpc code

type ErrorWithState added in v0.16.0 

type ErrorWithState interface {
	ErrorState() State
}

ErrorWithState is used to return the error State is such can be found

type Frame 

type Frame uintptr

Frame represents a program counter inside a stack frame.

func (Frame) Format 

func (f Frame) Format(s fmt.State, verb rune)

Format formats the frame according to the fmt.Formatter interface. 

%s    source file
%d    source line
%n    function name
%v    equivalent to %s:%d

Format accepts flags that alter the printing of some verbs, as follows: 

%+s   path of source file relative to the compile time GOPATH
%+v   equivalent to %+s:%d

type LastError added in v0.16.0 

type LastError struct {
	// contains filtered or unexported fields
}

* LastError tracks the most recent error for any ongoing process and how long it has persisted. * The err field should be a vterror to ensure we have meaningful error codes, causes, stack * traces, etc.

func NewLastError added in v0.16.0 

func NewLastError(name string, maxTimeInError time.Duration) *LastError

func (*LastError) Record added in v0.16.0 

func (le *LastError) Record(err error)

func (*LastError) ShouldRetry added in v0.16.0 

func (le *LastError) ShouldRetry() bool

type StackTrace 

type StackTrace []Frame

StackTrace is stack of Frames from innermost (newest) to outermost (oldest).

func (StackTrace) Format 

func (st StackTrace) Format(s fmt.State, verb rune)

Format format the stacktrace according to the fmt.Formatter interface. 

%s    source file
%d    source line
%n    function name
%v    equivalent to %s:%d

Format accepts flags that alter the printing of some verbs, as follows: 

%+s   path of source file relative to the compile time GOPATH
%+v   equivalent to %+s:%d

type State added in v0.10.0 

type State int

State is error state 

const (
	Undefined State = iota

	// invalid argument
	BadFieldError
	BadTableError
	CantUseOptionHere
	DataOutOfRange
	EmptyQuery
	ForbidSchemaChange
	IncorrectGlobalLocalVar
	NonUniqError
	NonUniqTable
	NonUpdateableTable
	SyntaxError
	WrongFieldWithGroup
	WrongGroupField
	WrongTypeForVar
	WrongValueForVar
	LockOrActiveTransaction
	MixOfGroupFuncAndFields
	DupFieldName
	WrongValueCountOnRow
	WrongValue
	WrongArguments
	BadNullError
	InvalidGroupFuncUse
	ViewWrongList

	// failed precondition
	NoDB
	InnodbReadOnly
	WrongNumberOfColumnsInSelect
	CantDoThisInTransaction
	RequiresPrimaryKey
	OperandColumns
	RowIsReferenced2
	NoReferencedRow2
	UnknownStmtHandler
	KeyDoesNotExist

	// not found
	BadDb
	DbDropExists
	NoSuchTable
	SPDoesNotExist
	UnknownSystemVariable
	UnknownTable
	NoSuchSession

	// already exists
	DbCreateExists

	// resource exhausted
	NetPacketTooLarge

	// cancelled
	QueryInterrupted

	// unimplemented
	NotSupportedYet
	UnsupportedPS

	// permission denied
	AccessDeniedError
	KillDeniedError

	// server not available
	ServerNotAvailable

	// unknown timezone
	UnknownTimeZone

	// regexp errors
	RegexpStringNotTerminated
	RegexpBufferOverflow
	RegexpIllegalArgument
	RegexpIndexOutOfBounds
	RegexpInternal
	RegexpRuleSyntax
	RegexpBadEscapeSequence
	RegexpUnimplemented
	RegexpMismatchParen
	RegexpBadInterval
	RegexpMaxLtMin
	RegexpInvalidBackRef
	RegexpLookBehindLimit
	RegexpMissingCloseBracket
	RegexpInvalidRange
	RegexpStackOverflow
	RegexpTimeOut
	RegexpPatternTooBig
	RegexpInvalidCaptureGroup
	RegexpInvalidFlag

	CharacterSetMismatch
	WrongParametersToNativeFct

	// No state should be added below NumOfStates
	NumOfStates
)

All the error states

func ErrState added in v0.10.0 

func ErrState(err error) State

ErrState returns the error state if it's a vtError. If err is nil, it returns Undefined.

type VitessError added in v0.16.0 

type VitessError struct {
	Err         error
	Description string
	ID          string
	State       State
}

func (*VitessError) Cause added in v0.16.0 

func (o *VitessError) Cause() error

func (*VitessError) Error added in v0.16.0 

func (o *VitessError) Error() string

Source Files

View all Source files

Directories

Path Synopsis

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