protocol

package
v0.108.0 Latest Latest
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 Go to latest Published: Aug 22, 2022 License: Apache-2.0 Imports: 26 Imported by: 0

Documentation

Overview

Package protocol implements the hdb command network protocol.

http://help.sap.com/hana/SAP_HANA_SQL_Command_Network_Protocol_Reference_en.pdf

Index

Constants

View Source 
const (
	DfvLevel0 int = 0 // base data format
	DfvLevel1 int = 1 // eval types support all data types
	DfvLevel2 int = 2 // reserved, broken, do not use
	DfvLevel3 int = 3 // additional types Longdate, Secondate, Daydate, Secondtime supported for NGAP
	DfvLevel4 int = 4 // generic support for new date/time types
	DfvLevel5 int = 5 // spatial types in ODBC on request
	DfvLevel6 int = 6 // BINTEXT
	DfvLevel7 int = 7 // with boolean support
	DfvLevel8 int = 8 // with FIXED8/12/16 support
)

Data format version values.

View Source 
const (

	// TcTableRef is the TypeCode for table references.
	TcTableRef typeCode = 0x7e // 126
	// TcTableRows is the TypeCode for table rows.
	TcTableRows typeCode = 0x7f // 127
)
View Source 
const (
	HdbErrAuthenticationFailed = 10
)

HANA Database errors.

View Source 
const MaxNumArg = math.MaxInt32

MaxNumArg is the maximum number of arguments allowed to send in a part.

View Source 
const (
	RaExecutionFailed = -3
)

rows affected

Variables

View Source 
var ErrDecimalOutOfRange = errors.New("decimal out of range error")

ErrDecimalOutOfRange means that a big.Rat exceeds the size of hdb decimal fields.

View Source 
var ErrFloatOutOfRange = errors.New("float out of range error")

ErrFloatOutOfRange means that a float exceeds the size of the hdb float field.

View Source 
var ErrIntegerOutOfRange = errors.New("integer out of range error")

ErrIntegerOutOfRange means that an integer exceeds the size of the hdb integer field.

View Source 
var ErrUint64OutOfRange = errors.New("uint64 values with high bit set are not supported")

ErrUint64OutOfRange means that a uint64 exceeds the size of a int64.

Functions

func IsSupportedDfv added in v0.107.0 

func IsSupportedDfv(dfv int) bool

IsSupportedDfv returns true if the data format version dfv is supported by the driver, false otherwise.

func RegisterScanType 

func RegisterScanType(dt DataType, scanType reflect.Type) bool

RegisterScanType registers driver owned datatype scantypes (e.g. Decimal, Lob).

func SupportedDfvs added in v0.107.0 

func SupportedDfvs(defaultOnly bool) []int

SupportedDfvs returns a slice of data format versions supported by the driver. If parameter defaultOnly is set only the default dfv is returned, otherwise all supported dfv values are returned.

Types

type Auth added in v0.107.0 

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

Auth holds the client authentication methods dependant on the driver.Connector attributes.

func NewAuth added in v0.107.0 

func NewAuth(logonname string) *Auth

NewAuth creates a new Auth instance.

func (*Auth) AddBasic added in v0.107.0 

func (a *Auth) AddBasic(username, password string)

AddBasic adds basic authentication methods.

func (*Auth) AddJWT added in v0.107.0 

func (a *Auth) AddJWT(token string)

AddJWT adds JWT authentication method.

func (*Auth) AddSessionCookie added in v0.107.0 

func (a *Auth) AddSessionCookie(cookie []byte, logonname, clientID string)

AddSessionCookie adds session cookie authentication method.

func (*Auth) AddX509 added in v0.107.0 

func (a *Auth) AddX509(cert, key []byte)

AddX509 adds X509 authentication method.

func (*Auth) FinalReply added in v0.107.3 

func (a *Auth) FinalReply() (*AuthFinalReply, error)

FinalReply returns the final reply part.

func (*Auth) FinalRequest added in v0.107.3 

func (a *Auth) FinalRequest() (*AuthFinalRequest, error)

FinalRequest returns the final request part.

func (*Auth) InitReply added in v0.107.3 

func (a *Auth) InitReply() (*AuthInitReply, error)

InitReply returns the init reply part.

func (*Auth) InitRequest added in v0.107.3 

func (a *Auth) InitRequest() (*AuthInitRequest, error)

InitRequest returns the init request part.

func (*Auth) Method added in v0.107.0 

func (a *Auth) Method() auth.Method

Method returns the selected authentication method.

func (*Auth) String added in v0.107.0 

func (a *Auth) String() string

type AuthCertKeySetter added in v0.107.0 

type AuthCertKeySetter interface {
	SetCertKey(cert, key []byte)
}

AuthCertKeySetter is implemented by authentication methods supporting certificate and key updates.

type AuthCookieGetter added in v0.107.0 

type AuthCookieGetter interface {
	Cookie() (logonname string, cookie []byte)
}

AuthCookieGetter is implemented by authentication methods supporting cookies to reconnect.

type AuthFinalReply added in v0.107.3 

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

AuthFinalReply represents an authentication final reply.

func (*AuthFinalReply) String added in v0.107.3 

func (r *AuthFinalReply) String() string

type AuthFinalRequest added in v0.107.3 

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

AuthFinalRequest represents an authentication final request.

func (*AuthFinalRequest) String added in v0.107.3 

func (r *AuthFinalRequest) String() string

type AuthInitReply added in v0.107.3 

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

AuthInitReply represents an authentication initial reply.

func (*AuthInitReply) String added in v0.107.3 

func (r *AuthInitReply) String() string

type AuthInitRequest added in v0.107.3 

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

AuthInitRequest represents an authentication initial request.

func (*AuthInitRequest) String added in v0.107.3 

func (r *AuthInitRequest) String() string

type AuthPasswordSetter added in v0.107.0 

type AuthPasswordSetter interface {
	SetPassword(string)
}

AuthPasswordSetter is implemented by authentication methods supporting password updates.

type AuthTokenSetter added in v0.107.0 

type AuthTokenSetter interface {
	SetToken(string)
}

AuthTokenSetter is implemented by authentication methods supporting token updates.

type Cdm added in v0.107.3 

type Cdm byte

Cdm represents a ConnectOption ClientDistributionMode. 

const (
	CdmOff                 Cdm = 0
	CdmConnection          Cdm = 1
	CdmStatement           Cdm = 2
	CdmConnectionStatement Cdm = 3
)

ConnectOption ClientDistributionMode constants.

func (Cdm) String added in v0.107.3 

func (i Cdm) String() string

type ClientContextOption added in v0.107.3 

type ClientContextOption int8

ClientContextOption represents a client context option. 

const (
	CcoClientVersion            ClientContextOption = 1
	CcoClientType               ClientContextOption = 2
	CcoClientApplicationProgram ClientContextOption = 3
)

ClientContextOption constants.

func (ClientContextOption) String added in v0.107.3 

func (i ClientContextOption) String() string

type ClientID added in v0.107.0 

type ClientID []byte

ClientID represents a client id part.

func (ClientID) String added in v0.107.3 

func (id ClientID) String() string

type Command added in v0.107.3 

type Command []byte

Command represents a command part with cesu8 content.

func (Command) String added in v0.107.3 

func (c Command) String() string

type ConnectOption added in v0.107.3 

type ConnectOption int8

ConnectOption represents a connect option. 

const (
	CoCompleteArrayExecution ConnectOption = 2 //!< @deprecated Array execution semantics, always true.
	CoClientLocale           ConnectOption = 3 //!< Client locale information.

	CoSelectForUpdateSupported ConnectOption = 14 //!< SELECT FOR UPDATE function code understood by client
	CoClientDistributionMode   ConnectOption = 15 //!< client distribution mode

	CoDistributionProtocolVersion ConnectOption = 17 //!< version of distribution protocol handling (@see DistributionProtocolVersionEnum)
	CoSplitBatchCommands          ConnectOption = 18 //!< permit splitting of batch commands

	CoDataFormatVersion2 ConnectOption = 23 //!< Version of data format used in communication (as DataFormatVersion used wrongly in old servers)

	CoFullVersionString ConnectOption = 44 //!< Full version string of the client or server (the sender) (added to hana2sp0)
	CoDatabaseName      ConnectOption = 45 //!< Database name (string) that we connected to (sent by server) (added to hana2sp0)

)

ConnectOption constants.

func (ConnectOption) String added in v0.107.3 

func (i ConnectOption) String() string

type ConvertError 

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

A ConvertError is returned by conversion methods if a go datatype to hdb datatype conversion fails.

func (*ConvertError) Error 

func (e *ConvertError) Error() string

func (*ConvertError) Unwrap 

func (e *ConvertError) Unwrap() error

Unwrap returns the nested error.

type DBConnectInfoType added in v0.107.3 

type DBConnectInfoType int8

DBConnectInfoType represents a database connect info type. 

const (
	CiDatabaseName DBConnectInfoType = 1 // string
	CiHost         DBConnectInfoType = 2 // string
	CiPort         DBConnectInfoType = 3 // int4
	CiIsConnected  DBConnectInfoType = 4 // bool
)

DBConnectInfoType constants.

func (DBConnectInfoType) String added in v0.107.3 

func (i DBConnectInfoType) String() string

type DataType 

type DataType byte

DataType is the type definition for data types supported by this package. 

const (
	DtUnknown DataType = iota // unknown data type
	DtBoolean
	DtTinyint
	DtSmallint
	DtInteger
	DtBigint
	DtReal
	DtDouble
	DtDecimal
	DtTime
	DtString
	DtBytes
	DtLob
	DtRows
)

Data type constants.

func (DataType) ScanType 

func (dt DataType) ScanType() reflect.Type

ScanType return the scan type (reflect.Type) of the corresponding data type.

func (DataType) String 

func (i DataType) String() string

type DecodeError added in v0.107.3 

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

DecodeError represents a decoding error.

func (*DecodeError) Error added in v0.107.3 

func (e *DecodeError) Error() string

type DecodeErrors added in v0.107.3 

type DecodeErrors []*DecodeError

DecodeErrors represents a list of decoding errors.

func (DecodeErrors) RowError added in v0.107.3 

func (errors DecodeErrors) RowError(row int) error

RowError returns an error if one is assigned to a row, nil otherwise.

type Fetchsize added in v0.107.3 

type Fetchsize int32

Fetchsize represents a fetch size part.

func (Fetchsize) String added in v0.107.3 

func (s Fetchsize) String() string

type FunctionCode added in v0.107.3 

type FunctionCode int16

FunctionCode represents a function code. 

const (
	FcDDL FunctionCode = 1
)

FunctionCode constants.

func (FunctionCode) IsProcedureCall added in v0.107.3 

func (fc FunctionCode) IsProcedureCall() bool

IsProcedureCall returns true if the function code is a procedure call, false otherwise.

func (FunctionCode) String added in v0.107.3 

func (i FunctionCode) String() string

type HdbErrors added in v0.107.3 

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

HdbErrors represent the collection of errors return by the server.

func (*HdbErrors) Code added in v0.107.3 

func (e *HdbErrors) Code() int

Code implements the driver.Error interface.

func (*HdbErrors) Error added in v0.107.3 

func (e *HdbErrors) Error() string

func (*HdbErrors) ErrorsFunc added in v0.107.3 

func (e *HdbErrors) ErrorsFunc(fn func(err error))

ErrorsFunc executes fn on all hdb errors.

func (*HdbErrors) HasWarnings added in v0.107.3 

func (e *HdbErrors) HasWarnings() bool

HasWarnings returns true if the error collection contains warnings, false otherwise.

func (*HdbErrors) IsError added in v0.107.3 

func (e *HdbErrors) IsError() bool

IsError implements the driver.Error interface.

func (*HdbErrors) IsFatal added in v0.107.3 

func (e *HdbErrors) IsFatal() bool

IsFatal implements the driver.Error interface.

func (*HdbErrors) IsWarning added in v0.107.3 

func (e *HdbErrors) IsWarning() bool

IsWarning implements the driver.Error interface.

func (*HdbErrors) Level added in v0.107.3 

func (e *HdbErrors) Level() int

Level implements the driver.Error interface.

func (*HdbErrors) NumError added in v0.107.3 

func (e *HdbErrors) NumError() int

NumError implements the driver.Error interface.

func (*HdbErrors) Position added in v0.107.3 

func (e *HdbErrors) Position() int

Position implements the driver.Error interface.

func (*HdbErrors) SetIdx added in v0.107.3 

func (e *HdbErrors) SetIdx(idx int)

SetIdx implements the driver.Error interface.

func (*HdbErrors) SetStmtNo added in v0.107.3 

func (e *HdbErrors) SetStmtNo(idx, no int)

SetStmtNo sets the staement number of the error.

func (*HdbErrors) StmtNo added in v0.107.3 

func (e *HdbErrors) StmtNo() int

StmtNo implements the driver.Error interface.

func (*HdbErrors) String added in v0.107.3 

func (e *HdbErrors) String() string

func (*HdbErrors) Text added in v0.107.3 

func (e *HdbErrors) Text() string

Text implements the driver.Error interface.

type InputParameters added in v0.107.3 

type InputParameters struct {
	InputFields []*ParameterField
	// contains filtered or unexported fields
}

InputParameters represents the set of input parameters.

func NewInputParameters added in v0.107.3 

func NewInputParameters(inputFields []*ParameterField, nvargs []driver.NamedValue, hasLob bool) (*InputParameters, error)

NewInputParameters returns a InputParameters instance.

func (*InputParameters) String added in v0.107.3 

func (p *InputParameters) String() string

type LobInDescr added in v0.107.3 

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

LobInDescr represents a lob input descriptor.

func (*LobInDescr) FetchNext added in v0.107.3 

func (d *LobInDescr) FetchNext(chunkSize int) (bool, error)

FetchNext fetches the next lob chunk.

func (*LobInDescr) String added in v0.107.3 

func (d *LobInDescr) String() string

type LobOptions added in v0.107.3 

type LobOptions int8

LobOptions represents a lob option set.

func (LobOptions) IsLastData added in v0.107.3 

func (o LobOptions) IsLastData() bool

IsLastData return true if the last data package was read, false otherwise.

func (LobOptions) String added in v0.107.3 

func (o LobOptions) String() string

type LobOutDescr added in v0.107.3 

type LobOutDescr struct {
	IsCharBased bool

	Opt     LobOptions
	NumChar int64

	ID LocatorID
	B  []byte
	// contains filtered or unexported fields
}

LobOutDescr represents a lob output descriptor.

func (*LobOutDescr) SetLobsDecoder added in v0.107.3 

func (d *LobOutDescr) SetLobsDecoder(fn func(descr *LobOutDescr, wr io.Writer) error)

SetLobsDecoder sets the function to decode lobs.

func (*LobOutDescr) SetWriter added in v0.107.3 

func (d *LobOutDescr) SetWriter(wr io.Writer) error

SetWriter implements the WriterSetter interface.

func (*LobOutDescr) String added in v0.107.3 

func (d *LobOutDescr) String() string

type LobsDecoderSetter added in v0.107.3 

type LobsDecoderSetter interface {
	SetLobsDecoder(fn func(descr *LobOutDescr, wr io.Writer) error)
}

LobsDecoderSetter is the interface wrapping the setLobsdecoder method (lob handling).

type LocatorID added in v0.107.3 

type LocatorID uint64 // byte[locatorIdSize]

LocatorID represents a locotor id.

type MessageType added in v0.107.3 

type MessageType int8

MessageType represents the message type. 

const (
	MtExecuteDirect MessageType = 2
	MtPrepare       MessageType = 3

	MtExecute  MessageType = 13
	MtWriteLob MessageType = 16
	MtReadLob  MessageType = 17

	MtAuthenticate    MessageType = 65
	MtConnect         MessageType = 66
	MtCommit          MessageType = 67
	MtRollback        MessageType = 68
	MtCloseResultset  MessageType = 69
	MtDropStatementID MessageType = 70
	MtFetchNext       MessageType = 71

	MtDisconnect MessageType = 77

	MtDBConnectInfo MessageType = 82
)

MessageType constants.

func (MessageType) ClientInfoSupported added in v0.107.3 

func (mt MessageType) ClientInfoSupported() bool

ClientInfoSupported returns true if message does support client info, false otherwise.

func (MessageType) String added in v0.107.3 

func (i MessageType) String() string

type Options added in v0.107.3 

type Options[K ~int8] map[K]any

Options represents a generic option part.

func (Options[K]) String added in v0.107.3 

func (ops Options[K]) String() string

type OutputParameters added in v0.107.3 

type OutputParameters struct {
	OutputFields []*ParameterField
	FieldValues  []driver.Value
	DecodeErrors DecodeErrors
}

OutputParameters represents the set of output parameters.

func (*OutputParameters) String added in v0.107.3 

func (p *OutputParameters) String() string

type ParameterField 

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

ParameterField contains database field attributes for parameters.

func NewTableRefParameterField added in v0.107.4 

func NewTableRefParameterField(idx int) *ParameterField

NewTableRefParameterField returns a ParameterField representing a table reference.

func NewTableRowsParameterField added in v0.107.4 

func NewTableRowsParameterField(idx int) *ParameterField

NewTableRowsParameterField returns a ParameterField representing table rows.

func (*ParameterField) Convert 

func (f *ParameterField) Convert(t transform.Transformer, v interface{}) (interface{}, error)

Convert returns the result of the fieldType conversion.

func (*ParameterField) In 

func (f *ParameterField) In() bool

In returns true if the parameter field is an input field.

func (*ParameterField) IsLob added in v0.107.4 

func (f *ParameterField) IsLob() bool

IsLob returns true if the ParameterField is of type lob, false otherwise.

func (*ParameterField) Name added in v0.107.3 

func (f *ParameterField) Name() string

Name returns the parameter field name.

func (*ParameterField) Nullable added in v0.107.3 

func (f *ParameterField) Nullable() bool

Nullable returns true if the field may be null, false otherwise. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeNullable

func (*ParameterField) Out 

func (f *ParameterField) Out() bool

Out returns true if the parameter field is an output field.

func (*ParameterField) ScanType added in v0.107.3 

func (f *ParameterField) ScanType() reflect.Type

ScanType returns the scan type of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeScanType

func (*ParameterField) String 

func (f *ParameterField) String() string

func (*ParameterField) TypeLength added in v0.107.3 

func (f *ParameterField) TypeLength() (int64, bool)

TypeLength returns the type length of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeLength

func (*ParameterField) TypeName added in v0.107.3 

func (f *ParameterField) TypeName() string

TypeName returns the type name of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeDatabaseTypeName

func (*ParameterField) TypePrecisionScale added in v0.107.3 

func (f *ParameterField) TypePrecisionScale() (int64, int64, bool)

TypePrecisionScale returns the type precision and scale (decimal types) of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypePrecisionScale

type ParameterMetadata added in v0.107.3 

type ParameterMetadata struct {
	ParameterFields []*ParameterField
}

ParameterMetadata represents the metadata of a parameter.

func (*ParameterMetadata) String added in v0.107.3 

func (m *ParameterMetadata) String() string

type ParameterMode added in v0.107.3 

type ParameterMode int8

ParameterMode represents the parameter mode set. 

const (
	PmIn ParameterMode = 0x01

	PmOut ParameterMode = 0x04
)

ParameterMode constants.

func (ParameterMode) String added in v0.107.3 

func (k ParameterMode) String() string

type PartAttributes added in v0.107.3 

type PartAttributes int8

PartAttributes represents the part attributes.

func (PartAttributes) LastPacket added in v0.107.3 

func (k PartAttributes) LastPacket() bool

LastPacket returns true if the last packet is sent, false otherwise.

func (PartAttributes) ResultsetClosed added in v0.107.3 

func (k PartAttributes) ResultsetClosed() bool

ResultsetClosed returns true if the result set is closed, false otherwise.

func (PartAttributes) String added in v0.107.3 

func (k PartAttributes) String() string

type PartHeader added in v0.107.3 

type PartHeader struct {
	PartKind       PartKind
	PartAttributes PartAttributes
	// contains filtered or unexported fields
}

PartHeader represents the part header.

func (*PartHeader) String added in v0.107.3 

func (h *PartHeader) String() string

type PartKind added in v0.107.3 

type PartKind int8

PartKind represents the part kind. 

const (
	PkCommand     PartKind = 3
	PkResultset   PartKind = 5
	PkError       PartKind = 6
	PkStatementID PartKind = 10

	PkRowsAffected        PartKind = 12
	PkResultsetID         PartKind = 13
	PkTopologyInformation PartKind = 15

	PkReadLobRequest PartKind = 17
	PkReadLobReply   PartKind = 18

	PkWriteLobRequest PartKind = 28
	PkClientContext   PartKind = 29
	PkWriteLobReply   PartKind = 30
	PkParameters      PartKind = 32
	PkAuthentication  PartKind = 33

	PkClientID PartKind = 35

	PkStatementContext PartKind = 39

	PkOutputParameters PartKind = 41
	PkConnectOptions   PartKind = 42

	PkFetchSize         PartKind = 45
	PkParameterMetadata PartKind = 47
	PkResultMetadata    PartKind = 48

	PkClientInfo PartKind = 57

	PkTransactionFlags PartKind = 64

	PkDBConnectInfo PartKind = 67
)

PartKind constants.

func (PartKind) String added in v0.107.3 

func (i PartKind) String() string

type ReadLobReply added in v0.107.3 

type ReadLobReply struct {
	ID  LocatorID
	Opt LobOptions
	B   []byte
}

ReadLobReply represents a lob read reply part.

func (*ReadLobReply) String added in v0.107.3 

func (r *ReadLobReply) String() string

type ReadLobRequest added in v0.107.3 

type ReadLobRequest struct {
	/*
	   read lobs:
	   - read lob field from database in chunks
	   - loop:
	     - readLobRequest
	     - readLobReply

	   - read lob reply
	     seems like readLobreply returns only a result for one lob - even if more then one is requested
	     --> read single lobs
	*/
	ID        LocatorID
	Ofs       int64
	ChunkSize int32
}

ReadLobRequest represents a lob read request part.

func (*ReadLobRequest) String added in v0.107.3 

func (r *ReadLobRequest) String() string

type ReadProvider 

type ReadProvider interface {
	Reader() io.Reader
}

ReadProvider is the interface wrapping the Reader which provides an io.Reader.

type Reader added in v0.107.3 

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

Reader represents a protocol reader.

func NewReader added in v0.107.3 

func NewReader(upStream bool, rd io.Reader, decoder func() transform.Transformer) *Reader

NewReader returns an instance of a protocol reader.

func (*Reader) FunctionCode added in v0.107.3 

func (r *Reader) FunctionCode() FunctionCode

FunctionCode returns the segment header function code.

func (*Reader) IterateParts added in v0.107.3 

func (r *Reader) IterateParts(partFn func(ph *PartHeader)) error

IterateParts is iterating over the parts returned by the server.

func (*Reader) Read added in v0.107.3 

func (r *Reader) Read(part partReader) error

func (*Reader) ReadProlog added in v0.107.3 

func (r *Reader) ReadProlog() error

ReadProlog reads the protocol prolog.

func (*Reader) ReadSkip added in v0.107.3 

func (r *Reader) ReadSkip() error

ReadSkip reads the server reply without returning the results.

func (*Reader) SessionID added in v0.107.3 

func (r *Reader) SessionID() int64

SessionID returns the message header session id.

func (*Reader) SetDfv added in v0.107.3 

func (r *Reader) SetDfv(dfv int)

SetDfv sets the data format version fpr the protocol reader.

type ResultField added in v0.107.3 

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

ResultField represents a database result field.

func (*ResultField) Name added in v0.107.3 

func (f *ResultField) Name() string

Name returns the result field name.

func (*ResultField) Nullable added in v0.107.3 

func (f *ResultField) Nullable() bool

Nullable returns true if the field may be null, false otherwise. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeNullable

func (*ResultField) ScanType added in v0.107.3 

func (f *ResultField) ScanType() reflect.Type

ScanType returns the scan type of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeScanType

func (*ResultField) String added in v0.107.3 

func (f *ResultField) String() string

String implements the Stringer interface.

func (*ResultField) TypeLength added in v0.107.3 

func (f *ResultField) TypeLength() (int64, bool)

TypeLength returns the type length of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeLength

func (*ResultField) TypeName added in v0.107.3 

func (f *ResultField) TypeName() string

TypeName returns the type name of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypeDatabaseTypeName

func (*ResultField) TypePrecisionScale added in v0.107.3 

func (f *ResultField) TypePrecisionScale() (int64, int64, bool)

TypePrecisionScale returns the type precision and scale (decimal types) of the field. see https://golang.org/pkg/database/sql/driver/#RowsColumnTypePrecisionScale

type ResultMetadata added in v0.107.3 

type ResultMetadata struct {
	ResultFields []*ResultField
}

ResultMetadata represents the metadata of a set of database result fields.

func (*ResultMetadata) String added in v0.107.3 

func (r *ResultMetadata) String() string

type Resultset added in v0.107.3 

type Resultset struct {
	ResultFields []*ResultField
	FieldValues  []driver.Value
	DecodeErrors DecodeErrors
}

Resultset represents a database result set.

func (*Resultset) String added in v0.107.3 

func (r *Resultset) String() string

type ResultsetID added in v0.107.3 

type ResultsetID uint64

ResultsetID represents a resultset id.

func (ResultsetID) String added in v0.107.3 

func (id ResultsetID) String() string

type RowsAffected added in v0.107.3 

type RowsAffected []int32

RowsAffected represents a rows affected part.

func (RowsAffected) String added in v0.107.3 

func (r RowsAffected) String() string

func (RowsAffected) Total added in v0.107.3 

func (r RowsAffected) Total() int64

Total return the total number of all affected rows.

type StatementID added in v0.107.3 

type StatementID uint64

StatementID represents the statement id part type.

func (StatementID) String added in v0.107.3 

func (id StatementID) String() string

type WriteLobDescr added in v0.107.3 

type WriteLobDescr struct {
	LobInDescr *LobInDescr
	ID         LocatorID
	Opt        LobOptions
	// contains filtered or unexported fields
}

WriteLobDescr represents a lob descriptor for writes (lob -> db).

func (*WriteLobDescr) FetchNext added in v0.107.3 

func (d *WriteLobDescr) FetchNext(chunkSize int) error

FetchNext fetches the next lob chunk.

func (WriteLobDescr) String added in v0.107.3 

func (d WriteLobDescr) String() string

type WriteLobReply added in v0.107.3 

type WriteLobReply struct {
	// write lob fields to db (reply)
	// - returns ids which have not been written completely
	IDs []LocatorID
}

WriteLobReply represents a lob write reply part.

func (*WriteLobReply) String added in v0.107.3 

func (r *WriteLobReply) String() string

type WriteLobRequest added in v0.107.3 

type WriteLobRequest struct {
	Descrs []*WriteLobDescr
}

WriteLobRequest represents a lob write request part.

func (*WriteLobRequest) String added in v0.107.3 

func (r *WriteLobRequest) String() string

type Writer added in v0.107.3 

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

Writer represents a protocol writer.

func NewWriter added in v0.107.3 

func NewWriter(wr *bufio.Writer, encoder func() transform.Transformer, sv map[string]string) *Writer

NewWriter returns an instance of a protocol writer.

func (*Writer) Write added in v0.107.3 

func (w *Writer) Write(sessionID int64, messageType MessageType, commit bool, writers ...partWriter) error

func (*Writer) WriteProlog added in v0.107.3 

func (w *Writer) WriteProlog() error

WriteProlog writes the protocol prolog.

type WriterSetter 

type WriterSetter interface{ SetWriter(w io.Writer) error }

WriterSetter is the interface wrapping the SetWriter method (Lob handling).

Source Files

View all Source files

Directories

Path Synopsis
Package auth provides authentication methods.
 Package auth provides authentication methods.
Package encoding implements hdb field type en,- and decodings.
 Package encoding implements hdb field type en,- and decodings.
Package julian provided julian time conversion functions.
 Package julian provided julian time conversion functions.
Package scanner implements a HANA SQL query scanner.
 Package scanner implements a HANA SQL query scanner.

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