// Sets the value stored at the given array position.
func lobVarSetValue(v *Variable, pos uint, value interface{}) error {
x, ok := value.([]byte)
if !ok {
return errgo.Newf("requires []byte, got %T", value)
}
var (
isTemporary C.boolean
lobType C.ub1
)
hndl, err := v.getLobLoc(pos)
if err != nil {
return err
}
// make sure have temporary LOBs set up
if err = v.environment.CheckStatus(
C.OCILobIsTemporary(v.environment.handle, v.environment.errorHandle,
hndl, &isTemporary),
"LobIsTemporary"); err != nil {
if CTrace {
ctrace("OCILobIsTemporary(env=%p, err=%p, handle=%p, dst=%p): %v",
v.environment.handle, v.environment.errorHandle, hndl, &isTemporary, err)
}
return errgo.Mask(err)
}
if isTemporary != C.TRUE {
if v.typ.oracleType == C.SQLT_BLOB {
lobType = C.OCI_TEMP_BLOB
} else {
lobType = C.OCI_TEMP_CLOB
}
// Py_BEGIN_ALLOW_THREADS
if err = v.environment.CheckStatus(
C.OCILobCreateTemporary(v.connection.handle,
v.environment.errorHandle,
hndl,
C.OCI_DEFAULT, v.typ.charsetForm, lobType, C.FALSE,
C.OCI_DURATION_SESSION),
"LobCreateTemporary"); err != nil {
// Py_END_ALLOW_THREADS
return errgo.Mask(err)
}
}
// trim the current value
// Py_BEGIN_ALLOW_THREADS
if err = v.environment.CheckStatus(
C.OCILobTrim(v.connection.handle, v.environment.errorHandle, hndl, 0),
"LobTrim"); err != nil {
return errgo.Mask(
// Py_END_ALLOW_THREADS
err)
}
// set the current value
// func (v *Variable) lobVarWrite(data []byte, pos uint, off int64) (amount int, err error) {
_, err = v.lobVarWrite(x, pos, 0)
return err
}
// Trim the LOB variable to the specified length.
func (lv *ExternalLobVar) Trim(newSize int) error {
var (
err error
)
if err = lv.Verify(); err != nil {
return errgo.Mask(
// Py_BEGIN_ALLOW_THREADS
err)
}
if CTrace {
ctrace("OCILobTrim(conn=%p, lob=%x, newSize=%d)",
lv.lobVar.connection.handle, lv.getHandleBytes(), newSize)
}
if err = lv.lobVar.environment.CheckStatus(
C.OCILobTrim(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle(), C.ub4(newSize)),
"LobTrim"); err != nil {
return errgo.Mask(
// Py_END_ALLOW_THREADS
err)
}
return nil
}
// Sets the value stored at the given array position.
func lobVarSetValue(v *Variable, pos uint, value interface{}) error {
x, ok := value.([]byte)
if !ok {
return fmt.Errorf("requires []byte, got %T", value)
}
var (
isTemporary C.boolean
lobType C.ub1
err error
)
j := pos * v.typ.size
// make sure have temporary LOBs set up
if err = v.environment.CheckStatus(
C.OCILobIsTemporary(v.environment.handle,
v.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&v.dataBytes[j])), &isTemporary),
"LobIsTemporary"); err != nil {
return err
}
if isTemporary != C.TRUE {
if v.typ.oracleType == C.SQLT_BLOB {
lobType = C.OCI_TEMP_BLOB
} else {
lobType = C.OCI_TEMP_CLOB
}
// Py_BEGIN_ALLOW_THREADS
if err = v.environment.CheckStatus(
C.OCILobCreateTemporary(v.connection.handle,
v.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&v.dataBytes[j])),
C.OCI_DEFAULT, v.typ.charsetForm, lobType, C.FALSE,
C.OCI_DURATION_SESSION),
"LobCreateTemporary"); err != nil {
// Py_END_ALLOW_THREADS
return err
}
}
// trim the current value
// Py_BEGIN_ALLOW_THREADS
if err = v.environment.CheckStatus(
C.OCILobTrim(v.connection.handle,
v.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&v.dataBytes[j])), 0),
"LobTrim"); err != nil {
return err
}
// Py_END_ALLOW_THREADS
// set the current value
// func (v *Variable) lobVarWrite(data []byte, pos uint, off int64) (amount int, err error) {
_, err = v.lobVarWrite(x, pos, 0)
return err
}
// Trim the LOB variable to the specified length.
func (lv *ExternalLobVar) Trim(newSize int) error {
var (
err error
)
if err = lv.Verify(); err != nil {
return err
}
// Py_BEGIN_ALLOW_THREADS
if err = lv.lobVar.environment.CheckStatus(
C.OCILobTrim(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&lv.lobVar.dataBytes[lv.pos*lv.lobVar.size])),
C.ub4(newSize)),
"LobTrim"); err != nil {
return err
}
// Py_END_ALLOW_THREADS
return nil
}