pgerror

package
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 Go to latest Published: Aug 11, 2020 License: Apache-2.0 Imports: 12 Imported by: 21

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Index

Constants

View Source 
const DefaultSeverity = "ERROR"

DefaultSeverity is the default severity for decoding severity of errors.

View Source 
const InternalErrorPrefix = "internal error"

InternalErrorPrefix is prepended on internal errors.

View Source 
const TxnRetryMsgPrefix = "restart transaction"

TxnRetryMsgPrefix is the prefix inserted in an error message when flattened

Variables

View Source 
var (
	ErrInvalidLengthErrors = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowErrors   = fmt.Errorf("proto: integer overflow")
)

Functions

func ComputeDefaultCode 

func ComputeDefaultCode(err error) pgcode.Code

ComputeDefaultCode looks at the current error object (not its causes) and returns: - the existing code for Error instances - SerializationFailure for roachpb retry errors that can be reported to clients - StatementCompletionUnknown for ambiguous commit errors - InternalError for assertion failures - FeatureNotSupportedError for unimplemented errors.

It is not meant to be used directly - it is only exported for use by test code. Use GetPGCode() instead.

func DangerousStatementf 

func DangerousStatementf(format string, args ...interface{}) error

DangerousStatementf creates a new error for "rejected dangerous statements".

func FullError 

func FullError(err error) string

FullError can be used when the hint and/or detail are to be tested.

func GetPGCode 

func GetPGCode(err error) pgcode.Code

GetPGCode retrieves the error code for an error.

func GetPGCodeInternal 

func GetPGCodeInternal(
	err error, computeDefaultCode func(err error) (code pgcode.Code),
) (code pgcode.Code)

GetPGCodeInternal retrieves a code for the error. It operates by combining the inner (cause) code and the code at the current level, at each level of cause.

- at each level:

  • if there is a candidate code at that level, that is used;
  • otherwise, it calls computeDefaultCode(). if the function returns an empty string, UncategorizedError is used. An example implementation for computeDefaultCode is provided below.

  • after that, it combines the code computed already for the cause (inner) and the new code just computed at the current level (outer) as follows:

  • if the outer code is uncategorized, the inner code is kept no matter what.

  • if the outer code has the special XX prefix, that is kept. (The "XX" prefix signals importance in the pg code hierarchy.)

  • if the inner code is not uncategorized, it is retained.

  • otherwise the outer code is retained.

This function should not be used directly. It is only exported for use in testing code. Use GetPGCode() instead.

func GetSeverity 

func GetSeverity(err error) string

GetSeverity attempts to unwrap and find a Severity.

func HasCandidateCode 

func HasCandidateCode(err error) bool

HasCandidateCode returns tue iff the error or one of its causes has a candidate pg error code.

func IsSQLRetryableError 

func IsSQLRetryableError(err error) bool

IsSQLRetryableError returns true if err is retryable. This is true for errors that show a connection issue or an issue with the node itself. This can occur when a node is restarting or is unstable in some other way. Note that retryable errors may occur event in cases where the SQL execution ran to completion.

TODO(bdarnell): Why are RPC errors in this list? These should generally be retried on the server side or transformed into ambiguous result errors ("connection reset/refused" are needed for the pgwire connection, but anything RPC-related should be handled within the cluster). TODO(knz): This should really use the errors library. Investigate how to get rid of the error message comparison.

func New 

func New(code pgcode.Code, msg string) error

New creates an error with a code.

func NewInternalTrackingError 

func NewInternalTrackingError(issue int, detail string) error

NewInternalTrackingError instantiates an error meant for use with telemetry.ReportError directly.

Do not use this! Convert uses to AssertionFailedf or similar above.

func NewWithDepthf 

func NewWithDepthf(depth int, code pgcode.Code, format string, args ...interface{}) error

NewWithDepthf creates an error with a pg code and extracts the context information at the specified depth level.

func Newf 

func Newf(code pgcode.Code, format string, args ...interface{}) error

Newf creates an Error with a format string.

func WithCandidateCode 

func WithCandidateCode(err error, code pgcode.Code) error

WithCandidateCode decorates the error with a candidate postgres error code. It is called "candidate" because the code is only used by GetPGCode() below conditionally. The code is considered PII-free and is thus reportable.

func WithSeverity 

func WithSeverity(err error, severity string) error

WithSeverity decorates the error with a severity.

func Wrap 

func Wrap(err error, code pgcode.Code, msg string) error

Wrap wraps an error and adds a pg error code. Only the code is added if the message is empty.

func WrapWithDepthf 

func WrapWithDepthf(
	depth int, err error, code pgcode.Code, format string, args ...interface{},
) error

WrapWithDepthf wraps an error. It also annotates the provided pg code as new candidate code, to be used if the underlying error does not have one already.

func Wrapf 

func Wrapf(err error, code pgcode.Code, format string, args ...interface{}) error

Wrapf wraps an error and adds a pg error code. See the doc on WrapWithDepthf for details.

func WrongNumberOfPreparedStatements 

func WrongNumberOfPreparedStatements(n int) error

WrongNumberOfPreparedStatements creates new an Error for trying to prepare a query string containing more than one statement.

Types

type ClientVisibleAmbiguousError 

type ClientVisibleAmbiguousError interface {
	ClientVisibleAmbiguousError()
}

ClientVisibleAmbiguousError mirrors roachpb.ClientVisibleAmbiguousError but is defined here to avoid an import cycle.

type ClientVisibleRetryError 

type ClientVisibleRetryError interface {
	ClientVisibleRetryError()
}

ClientVisibleRetryError mirrors roachpb.ClientVisibleRetryError but is defined here to avoid an import cycle.

type Error 

type Error struct {
	// standard pg error fields. This can be passed
	// over the pg wire protocol.
	Code     string        `protobuf:"bytes,1,opt,name=code,proto3" json:"code,omitempty"`
	Message  string        `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
	Detail   string        `protobuf:"bytes,3,opt,name=detail,proto3" json:"detail,omitempty"`
	Hint     string        `protobuf:"bytes,4,opt,name=hint,proto3" json:"hint,omitempty"`
	Severity string        `protobuf:"bytes,8,opt,name=severity,proto3" json:"severity,omitempty"`
	Source   *Error_Source `protobuf:"bytes,5,opt,name=source,proto3" json:"source,omitempty"`
}

Error contains all Postgres wire protocol error fields. See https://www.postgresql.org/docs/current/static/protocol-error-fields.html for a list of all Postgres error fields, most of which are optional and can be used to provide auxiliary error information.

func Flatten 

func Flatten(err error) *Error

Flatten turns any error into a pgerror with fields populated. As the name implies, the details from the chain of causes is projected into a single struct. This is useful in at least two places:

  • to generate Error objects suitable for 19.1 nodes, which only recognize this type of payload.
  • to generate an error packet on pgwire.

Additionally, this can be used in the remainder of the code base when an Error object is expected, until that code is updated to use the errors library directly.

Flatten() returns a nil ptr if err was nil to start with.

func (*Error) Descriptor 

func (*Error) Descriptor() ([]byte, []int)

func (*Error) Error 

func (pg *Error) Error() string

Error implements the error interface.

func (*Error) ErrorDetail 

func (pg *Error) ErrorDetail() string

ErrorDetail implements the hintdetail.ErrorDetailer interface.

func (*Error) ErrorHint 

func (pg *Error) ErrorHint() string

ErrorHint implements the hintdetail.ErrorHinter interface.

func (*Error) Format 

func (pg *Error) Format(s fmt.State, verb rune)

Format implements the fmt.Formatter interface.

%v/%s prints the error as usual. %#v adds the pg error code at the beginning. %+v prints all the details, including the embedded stack traces.

func (*Error) Marshal 

func (m *Error) Marshal() (dAtA []byte, err error)

func (*Error) MarshalTo 

func (m *Error) MarshalTo(dAtA []byte) (int, error)

func (*Error) ProtoMessage 

func (*Error) ProtoMessage()

func (*Error) Reset 

func (m *Error) Reset()

func (*Error) Size 

func (m *Error) Size() (n int)

func (*Error) String 

func (m *Error) String() string

func (*Error) Unmarshal 

func (m *Error) Unmarshal(dAtA []byte) error

func (*Error) XXX_DiscardUnknown 

func (m *Error) XXX_DiscardUnknown()

func (*Error) XXX_Marshal 

func (m *Error) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Error) XXX_Merge 

func (m *Error) XXX_Merge(src proto.Message)

func (*Error) XXX_Size 

func (m *Error) XXX_Size() int

func (*Error) XXX_Unmarshal 

func (m *Error) XXX_Unmarshal(b []byte) error

type Error_Source 

type Error_Source struct {
	File     string `protobuf:"bytes,1,opt,name=file,proto3" json:"file,omitempty"`
	Line     int32  `protobuf:"varint,2,opt,name=line,proto3" json:"line,omitempty"`
	Function string `protobuf:"bytes,3,opt,name=function,proto3" json:"function,omitempty"`
}

func (*Error_Source) Descriptor 

func (*Error_Source) Descriptor() ([]byte, []int)

func (*Error_Source) Marshal 

func (m *Error_Source) Marshal() (dAtA []byte, err error)

func (*Error_Source) MarshalTo 

func (m *Error_Source) MarshalTo(dAtA []byte) (int, error)

func (*Error_Source) ProtoMessage 

func (*Error_Source) ProtoMessage()

func (*Error_Source) Reset 

func (m *Error_Source) Reset()

func (*Error_Source) Size 

func (m *Error_Source) Size() (n int)

func (*Error_Source) String 

func (m *Error_Source) String() string

func (*Error_Source) Unmarshal 

func (m *Error_Source) Unmarshal(dAtA []byte) error

func (*Error_Source) XXX_DiscardUnknown 

func (m *Error_Source) XXX_DiscardUnknown()

func (*Error_Source) XXX_Marshal 

func (m *Error_Source) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Error_Source) XXX_Merge 

func (m *Error_Source) XXX_Merge(src proto.Message)

func (*Error_Source) XXX_Size 

func (m *Error_Source) XXX_Size() int

func (*Error_Source) XXX_Unmarshal 

func (m *Error_Source) XXX_Unmarshal(b []byte) error

Source Files

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