// internalRead returns the size of the LOB variable for internal comsumption.
func (lv *ExternalLobVar) internalRead(p []byte, off int64) (length int64, err error) {
var charsetID C.ub2
j := lv.pos * lv.lobVar.typ.size
if lv.isFile {
// Py_BEGIN_ALLOW_THREADS
if err = lv.lobVar.environment.CheckStatus(
C.OCILobFileOpen(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&lv.lobVar.dataBytes[j])),
C.OCI_FILE_READONLY),
"LobFileOpen"); err != nil {
return
}
}
// Py_END_ALLOW_THREADS
// Py_BEGIN_ALLOW_THREADS
if lv.lobVar.typ == NClobVarType {
// charsetID = C.OCI_UTF16ID
charsetID = CsIDAl32UTF8
} else {
charsetID = 0
}
length = int64(len(p))
olength := C.ub4(length + 1)
if err = lv.lobVar.environment.CheckStatus(
C.OCILobRead(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&lv.lobVar.dataBytes[j])),
&olength, C.ub4(off+1), unsafe.Pointer(&p[0]),
C.ub4(len(p)), nil, nil, charsetID, lv.lobVar.typ.charsetForm),
"LobRead"); err != nil {
// Py_END_ALLOW_THREADS
C.OCILobFileClose(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&lv.lobVar.dataBytes[j])))
return
}
if lv.isFile {
// Py_BEGIN_ALLOW_THREADS
if err = lv.lobVar.environment.CheckStatus(
C.OCILobFileClose(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
(*C.OCILobLocator)(unsafe.Pointer(&lv.lobVar.dataBytes[j]))),
"LobFileClose"); err != nil {
return
}
}
return
}
func (rc *OCI8Rows) Next(dest []driver.Value) error {
rv := C.OCIStmtFetch(
(*C.OCIStmt)(rc.s.s),
(*C.OCIError)(rc.s.c.err),
1,
C.OCI_FETCH_NEXT,
C.OCI_DEFAULT)
if rv == C.OCI_NO_DATA {
return io.EOF
} else if rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
for i := range dest {
// TODO: switch rc.cols[i].ind
if rc.cols[i].ind == -1 { // Null
dest[i] = nil
continue
} else if rc.cols[i].ind != 0 {
return errors.New(fmt.Sprintf("Unknown column indicator: %d, col %s", rc.cols[i].ind, rc.cols[i].name))
}
switch rc.cols[i].kind {
case C.SQLT_DAT: // for test, date are return as timestamp
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
// TODO: Handle BCE dates (http://docs.oracle.com/cd/B12037_01/appdev.101/b10779/oci03typ.htm#438305)
// TODO: Handle timezones (http://docs.oracle.com/cd/B12037_01/appdev.101/b10779/oci03typ.htm#443601)
dest[i] = time.Date(
(int(buf[0])-100)*100+(int(buf[1])-100),
time.Month(int(buf[2])),
int(buf[3]),
int(buf[4])-1,
int(buf[5])-1,
int(buf[6])-1,
0,
rc.s.c.location)
case C.SQLT_BLOB, C.SQLT_CLOB:
ptmp := unsafe.Pointer(uintptr(rc.cols[i].pbuf) + unsafe.Sizeof(unsafe.Pointer(nil)))
bamt := (*C.ub4)(ptmp)
*bamt = 0
ptmp = unsafe.Pointer(uintptr(rc.cols[i].pbuf) + unsafe.Sizeof(C.ub4(0)) + unsafe.Sizeof(unsafe.Pointer(nil)))
b := (*[1 << 30]byte)(ptmp)[0:blobBufSize]
var buf []byte
again:
rv = C.OCILobRead(
(*C.OCISvcCtx)(rc.s.c.svc),
(*C.OCIError)(rc.s.c.err),
*(**C.OCILobLocator)(rc.cols[i].pbuf),
bamt,
1,
ptmp,
C.ub4(blobBufSize),
nil,
nil,
0,
C.SQLCS_IMPLICIT)
if rv == C.OCI_NEED_DATA {
buf = append(buf, b[:int(*bamt)]...)
goto again
}
if rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
if rc.cols[i].kind == C.SQLT_BLOB {
dest[i] = append(buf, b[:int(*bamt)]...)
} else {
dest[i] = string(append(buf, b[:int(*bamt)]...))
}
case C.SQLT_CHR, C.SQLT_AFC, C.SQLT_AVC:
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
switch {
case rc.cols[i].ind == 0: // Normal
dest[i] = string(buf)
case rc.cols[i].ind == -2 || // Field longer than type (truncated)
rc.cols[i].ind > 0: // Field longer than type (truncated). Value is original length.
dest[i] = string(buf)
default:
return errors.New(fmt.Sprintf("Unknown column indicator: %d", rc.cols[i].ind))
}
case C.SQLT_BIN: // RAW
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
dest[i] = buf
case C.SQLT_NUM: // NUMBER
buf := (*[21]byte)(unsafe.Pointer(rc.cols[i].pbuf))
dest[i] = buf
case C.SQLT_VNU: // VARNUM
buf := (*[22]byte)(unsafe.Pointer(rc.cols[i].pbuf))
dest[i] = buf
case C.SQLT_INT: // INT
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
dest[i] = buf
case C.SQLT_LNG: // LONG
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
dest[i] = buf
case C.SQLT_IBDOUBLE, C.SQLT_IBFLOAT:
colsize := rc.cols[i].size
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:colsize]
if colsize == 4 {
v := uint32(buf[3])
v |= uint32(buf[2]) << 8
v |= uint32(buf[1]) << 16
v |= uint32(buf[0]) << 24
// Don't know why bits are inverted that way, but it works
if buf[0]&0x80 == 0 {
v ^= 0xffffffff
} else {
v &= 0x7fffffff
}
dest[i] = math.Float32frombits(v)
} else if colsize == 8 {
v := uint64(buf[7])
v |= uint64(buf[6]) << 8
v |= uint64(buf[5]) << 16
v |= uint64(buf[4]) << 24
v |= uint64(buf[3]) << 32
v |= uint64(buf[2]) << 40
v |= uint64(buf[1]) << 48
v |= uint64(buf[0]) << 56
// Don't know why bits are inverted that way, but it works
if buf[0]&0x80 == 0 {
v ^= 0xffffffffffffffff
} else {
v &= 0x7fffffffffffffff
}
dest[i] = math.Float64frombits(v)
} else {
return errors.New(fmt.Sprintf("Unhandled binary float size: %d", colsize))
}
case C.SQLT_TIMESTAMP:
if rv := C.WrapOCIDateTimeGetDateTime(
(*C.OCIEnv)(rc.s.c.env),
(*C.OCIError)(rc.s.c.err),
*(**C.OCIDateTime)(rc.cols[i].pbuf),
); rv.rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
} else {
dest[i] = time.Date(
int(rv.y),
time.Month(rv.m),
int(rv.d),
int(rv.hh),
int(rv.mm),
int(rv.ss),
int(rv.ff),
rc.s.c.location)
}
case C.SQLT_TIMESTAMP_TZ, C.SQLT_TIMESTAMP_LTZ:
tptr := *(**C.OCIDateTime)(rc.cols[i].pbuf)
rv := C.WrapOCIDateTimeGetDateTime(
(*C.OCIEnv)(rc.s.c.env),
(*C.OCIError)(rc.s.c.err),
tptr)
if rv.rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
rvz := C.WrapOCIDateTimeGetTimeZoneNameOffset(
(*C.OCIEnv)(rc.s.c.env),
(*C.OCIError)(rc.s.c.err),
tptr)
if rvz.rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
nnn := C.GoStringN((*C.char)((unsafe.Pointer)(&rvz.zone[0])), C.int(rvz.zlen))
loc, err := time.LoadLocation(nnn)
if err != nil {
// TODO: reuse locations
loc = time.FixedZone(nnn, int(rvz.h)*60*60+int(rvz.m)*60)
}
dest[i] = time.Date(
int(rv.y),
time.Month(rv.m),
int(rv.d),
int(rv.hh),
int(rv.mm),
int(rv.ss),
int(rv.ff),
loc)
case C.SQLT_INTERVAL_DS:
iptr := *(**C.OCIInterval)(rc.cols[i].pbuf)
rv := C.WrapOCIIntervalGetDaySecond(
(*C.OCIEnv)(rc.s.c.env),
(*C.OCIError)(rc.s.c.err),
iptr)
if rv.rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
dest[i] = int64(time.Duration(rv.d)*time.Hour*24 + time.Duration(rv.hh)*time.Hour + time.Duration(rv.mm)*time.Minute + time.Duration(rv.ss)*time.Second + time.Duration(rv.ff))
case C.SQLT_INTERVAL_YM:
iptr := *(**C.OCIInterval)(rc.cols[i].pbuf)
rv := C.WrapOCIIntervalGetYearMonth(
(*C.OCIEnv)(rc.s.c.env),
(*C.OCIError)(rc.s.c.err),
iptr)
if rv.rv != C.OCI_SUCCESS {
return ociGetError(rc.s.c.err)
}
dest[i] = int64(rv.y)*12 + int64(rv.m)
default:
return errors.New(fmt.Sprintf("Unhandled column type: %d", rc.cols[i].kind))
}
}
return nil
}
func (rc *OCI8Rows) Next(dest []driver.Value) error {
rv := C.OCIStmtFetch(
(*C.OCIStmt)(rc.s.s),
(*C.OCIError)(rc.s.c.err),
1,
C.OCI_FETCH_NEXT,
C.OCI_DEFAULT)
if rv == C.OCI_ERROR {
err := ociGetError(rc.s.c.err)
if err.Error()[:9] != "ORA-01405" {
return err
}
}
if rv == C.OCI_NO_DATA {
return io.EOF
}
var err error
for i := range dest {
if rc.cols[i].ind == -1 { //Null
dest[i] = nil
continue
}
switch rc.cols[i].kind {
case C.SQLT_DAT:
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
//TODO Handle BCE dates (http://docs.oracle.com/cd/B12037_01/appdev.101/b10779/oci03typ.htm#438305)
//TODO Handle timezones (http://docs.oracle.com/cd/B12037_01/appdev.101/b10779/oci03typ.htm#443601)
datestr := fmt.Sprintf(dateStrFmt, ((int(buf[0])-100)*100)+(int(buf[1])-100), int(buf[2]), int(buf[3]), int(buf[4])-1, int(buf[5])-1, int(buf[6])-1)
dest[i], err = time.ParseInLocation(dateFmt, datestr, rc.s.c.location)
if err != nil {
return fmt.Errorf("Unknown date format:", err)
}
case C.SQLT_BLOB, C.SQLT_CLOB:
var bamt C.ub4
b := make([]byte, rc.cols[i].size)
rv = C.OCILobRead(
(*C.OCISvcCtx)(rc.s.c.svc),
(*C.OCIError)(rc.s.c.err),
(*C.OCILobLocator)(rc.cols[i].pbuf),
&bamt,
1,
unsafe.Pointer(&b[0]),
C.ub4(rc.cols[i].size),
nil,
nil,
0,
C.SQLCS_IMPLICIT)
if rv == C.OCI_ERROR {
return ociGetError(rc.s.c.err)
}
dest[i] = b
case C.SQLT_CHR, C.SQLT_AFC, C.SQLT_AVC:
buf := (*[1 << 30]byte)(unsafe.Pointer(rc.cols[i].pbuf))[0:rc.cols[i].rlen]
switch {
case rc.cols[i].ind == 0: //Normal
dest[i] = string(buf)
case rc.cols[i].ind == -2 || //Field longer than type (truncated)
rc.cols[i].ind > 0: //Field longer than type (truncated). Value is original length.
dest[i] = string(buf)
default:
return errors.New(fmt.Sprintf("Unknown column indicator: %d", rc.cols[i].ind))
}
default:
return errors.New(fmt.Sprintf("Unhandled column type: %d", rc.cols[i].kind))
}
}
return nil
}
// internalRead returns the size of the LOB variable for internal comsumption.
func (lv *ExternalLobVar) internalRead(p []byte, off int64) (length int64, err error) {
var charsetID C.ub2
if lv.isFile {
// Py_BEGIN_ALLOW_THREADS
if CTrace {
ctrace("OCILobFileOpen(conn=%p, lob=%x, OCI_FILE_READONLY)",
lv.lobVar.connection.handle, lv.getHandleBytes())
}
if err = lv.lobVar.environment.CheckStatus(
C.OCILobFileOpen(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle(), C.OCI_FILE_READONLY),
"LobFileOpen"); err != nil {
return
}
}
// Py_END_ALLOW_THREADS
// Py_BEGIN_ALLOW_THREADS
if lv.lobVar.typ == NClobVarType {
// charsetID = C.OCI_UTF16ID
charsetID = CsIDAl32UTF8
} else {
charsetID = 0
}
var (
byteLen2 = C.oraub8(len(p))
charLen2 = C.oraub8(0)
byteLen = C.ub4(len(p))
status C.sword
pos = int(0)
)
for {
if useLobRead2 {
if CTrace {
ctrace("OCILobRead2(conn=%p, lob=%x, byteLen=%d, charLen=%d, off=%d, &p=%p "+
"len(p)=%d, piece=%d, csID=%d, csF=%d",
lv.lobVar.connection.handle,
lv.getHandleBytes(), byteLen2, charLen2, off+1,
&p[pos], len(p)-pos, C.OCI_ONE_PIECE,
charsetID, lv.lobVar.typ.charsetForm)
}
status = C.OCILobRead2(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle(), &byteLen2, &charLen2, C.oraub8(off+1),
unsafe.Pointer(&p[pos]), C.oraub8(len(p)-pos), C.OCI_ONE_PIECE,
nil, nil, charsetID, lv.lobVar.typ.charsetForm)
} else {
if CTrace {
//log.Printf("p=%q len(p)=%d pos=%d byteLen=%d", p, len(p), pos, byteLen)
ctrace("OCILobRead(conn=%p, lob=%x, byteLen=%d, off=%d, &p=%p "+
"len(p)=%d, csID=%d, csF=%d",
lv.lobVar.connection.handle,
lv.getHandleBytes(), byteLen, off+1,
&p[pos], len(p)-pos,
charsetID, lv.lobVar.typ.charsetForm)
}
status = C.OCILobRead(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle(), &byteLen, C.ub4(off+1),
unsafe.Pointer(&p[pos]), C.ub4(len(p)-pos),
nil, nil,
charsetID, lv.lobVar.typ.charsetForm)
}
if !(status == C.OCI_SUCCESS || status == C.OCI_NEED_DATA) {
err = lv.lobVar.environment.CheckStatus(status, "LobRead")
if CTrace {
ctrace("OCILobFileClose(conn=%p, lob=%p)",
lv.lobVar.connection.handle, lv.getHandleBytes())
}
C.OCILobFileClose(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle())
return
}
if useLobRead2 {
byteLen = C.ub4(byteLen2)
}
off += int64(byteLen)
length += int64(byteLen)
if CTrace {
if useLobRead2 {
ctrace("(byteLen2=%d charLen2=%d) => length=%d off=%d",
byteLen2, charLen2, length, off)
} else {
ctrace("byteLen=%d => length=%d off=%d", byteLen, length, off)
}
}
if status == C.OCI_SUCCESS {
break
}
pos += int(byteLen)
if useLobRead2 {
byteLen2 = C.oraub8(len(p) - pos)
} else {
byteLen = C.ub4(len(p) - pos)
}
}
if lv.isFile {
// Py_BEGIN_ALLOW_THREADS
if CTrace {
ctrace("OCILobFileClose(conn=%p, lob=%x)",
lv.lobVar.connection.handle, lv.getHandleBytes())
}
if err = lv.lobVar.environment.CheckStatus(
C.OCILobFileClose(lv.lobVar.connection.handle,
lv.lobVar.environment.errorHandle,
lv.getHandle()),
"LobFileClose"); err != nil {
return
}
}
if 0 == length && err == nil {
err = io.EOF
}
if CTrace {
ctrace("internalRead returns %d, %s", length, err)
}
return
}
