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oceanbase/src/share/ob_lob_access_utils.cpp

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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
* This file contains implementation for lob_access_utils.
*/
#define USING_LOG_PREFIX COMMON
#include "share/ob_lob_access_utils.h"
#include "lib/objectpool/ob_server_object_pool.h"
#include "common/sql_mode/ob_sql_mode.h"
#include "storage/lob/ob_lob_util.h"
#include "storage/tx/ob_trans_define_v4.h"
#include "storage/tx/ob_trans_service.h"
namespace oceanbase
{
namespace common
{
void ObLobTextIterCtx::init(bool is_clone /* false */)
{
buff_byte_len_ = MAX(buff_byte_len_, OB_LOB_ITER_DEFAULT_BUFFER_LEN);
if (is_clone) {
// not used currently, waititng for temp lob based on temporary file
is_cloned_temporary_ = is_clone;
}
}
void ObLobTextIterCtx::reuse()
{
content_byte_len_ = 0;
content_len_ = 0;
accessed_byte_len_ = 0;
accessed_len_ = 0;
last_accessed_byte_len_ = 0;
last_accessed_len_ = 0;
iter_count_ = 0;
if (OB_NOT_NULL(lob_query_iter_)) {
lob_query_iter_->reset();
OB_DELETE(ObLobQueryIter, "unused", lob_query_iter_);
lob_query_iter_ = NULL;
}
}
// ----- implementations of ObTextStringIter -----
ObTextStringIter::~ObTextStringIter()
{
if (is_outrow_ && OB_NOT_NULL(ctx_)) {
if (OB_NOT_NULL(ctx_->lob_query_iter_)) {
ctx_->lob_query_iter_->reset();
OB_DELETE(ObLobQueryIter, "unused", ctx_->lob_query_iter_);
ctx_->lob_query_iter_ = NULL;
}
}
}
int ObTextStringIter::init(uint32_t buffer_len,
const sql::ObBasicSessionInfo *session,
ObIAllocator *allocator,
bool clone_remote /* false */)
{
int ret = OB_SUCCESS;
if (is_init_) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter already initiated", K(ret));
} else if (!(is_lob_storage(type_))) {
is_lob_ = false;
is_outrow_ = false;
} else if (datum_str_.length() == 0) {
COMMON_LOG(DEBUG, "Lob: iter with null input str", K(ret), K(*this));
} else {
ObLobLocatorV2 locator(datum_str_, has_lob_header_);
is_lob_ = true;
if (!has_lob_header_) {
is_outrow_ = false;
} else if (!locator.is_valid()) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN,"Lob: invalid lob", K(ret));
} else if (FALSE_IT(is_outrow_ = !locator.has_inrow_data())) {
} else if (!is_outrow_) { // inrow lob always get full data, no need ctx_
} else if (OB_ISNULL(allocator)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter with null allocator", K(ret));
} else { // outrow lob
char *ctx_buffer = static_cast<char *>(allocator->alloc(sizeof(ObLobTextIterCtx)));
if (OB_ISNULL(ctx_buffer)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
COMMON_LOG(WARN,"Lob: failed to alloc output buffer", K(ret), KP(ctx_buffer));
} else {
ctx_ = new (ctx_buffer) ObLobTextIterCtx(locator, session, allocator, buffer_len);
ctx_ ->init(clone_remote);
}
}
}
if (OB_SUCC(ret)) {
state_ = TEXTSTRING_ITER_INIT;
is_init_ = true;
}
return ret;
}
static int init_lob_access_param(storage::ObLobAccessParam &param,
ObLobTextIterCtx *lob_iter_ctx,
ObCollationType cs_type,
ObIAllocator *allocator = nullptr)
{
int ret = OB_SUCCESS;
int64_t query_timeout = 0;
ObMemLobTxInfo *tx_info = NULL;
ObMemLobLocationInfo *location_info = NULL;
ObLobCommon *disk_loc = NULL;
ObString disk_loc_str;
if (OB_ISNULL(lob_iter_ctx)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid lob iter ctx.", K(ret));
} else if (!lob_iter_ctx->locator_.is_persist_lob()) {
ret = OB_NOT_IMPLEMENT;
COMMON_LOG(WARN, "Lob: outrow temp lob is not supported", K(ret), K(lob_iter_ctx->locator_));
} else if (OB_FAIL(lob_iter_ctx->locator_.get_disk_locator(disk_loc_str))) {
COMMON_LOG(WARN, "Lob: get disk locator failed.", K(ret));
} else if (FALSE_IT(disk_loc = reinterpret_cast<ObLobCommon *>(disk_loc_str.ptr()))){
} else if (OB_ISNULL(disk_loc) || disk_loc->is_init_ == false) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid disk_locator.", K(ret), KP(disk_loc));
} else {
if (OB_ISNULL(lob_iter_ctx->session_)) {
query_timeout = ObTimeUtility::current_time() + 60 * USECS_PER_SEC;
} else if (OB_FAIL(lob_iter_ctx->session_->get_query_timeout(query_timeout))) {
COMMON_LOG(WARN, "Lob: get_query_timeout failed.", K(ret), K(*lob_iter_ctx));
}
}
if (OB_FAIL(ret)) {
} else if (OB_FAIL(lob_iter_ctx->locator_.get_tx_info(tx_info))) {
} else if (OB_FAIL(lob_iter_ctx->locator_.get_location_info(location_info))) {
} else {
param.tx_desc_ = NULL;
param.snapshot_.core_.tx_id_ = tx_info->tx_id_;
param.snapshot_.core_.version_.convert_for_tx(tx_info->version_);
param.snapshot_.core_.scn_ = tx_info->scn_;
param.snapshot_.valid_= true;
param.snapshot_.source_ = transaction::ObTxReadSnapshot::SRC::LS;
param.snapshot_.snapshot_lsid_ = share::ObLSID(location_info->ls_id_);
param.ls_id_ = share::ObLSID(location_info->ls_id_);
param.sql_mode_ = (lob_iter_ctx->session_ == NULL) ? SMO_DEFAULT : lob_iter_ctx->session_->get_sql_mode();
param.tablet_id_ = ObTabletID(location_info->tablet_id_);
if (allocator == nullptr) {
allocator = lob_iter_ctx->alloc_;
}
param.allocator_ = allocator;
int64_t disk_loc_handle_size = disk_loc_str.length();
param.lob_common_ = disk_loc;
param.handle_size_ = disk_loc_handle_size;
param.byte_size_ = param.lob_common_->get_byte_size(param.handle_size_);
param.coll_type_ = cs_type;
if (!lob_iter_ctx->locator_.is_lob_disk_locator()) {
param.lob_locator_ = &lob_iter_ctx->locator_;
}
param.timeout_ = (lob_iter_ctx->session_ == NULL)
? query_timeout
: (lob_iter_ctx->session_->get_query_start_time() + query_timeout);
param.scan_backward_ = false;
param.offset_ = 0; // use 0 offset when reading full lob data
param.len_ = 0;
}
return ret;
}
int ObTextStringIter::get_outrow_lob_full_data(ObIAllocator *allocator /*nullptr*/ )
{
int ret = OB_SUCCESS;
storage::ObLobManager* lob_mngr = MTL(storage::ObLobManager*);
if (!has_lob_header_ || !is_outrow_ || OB_ISNULL(ctx_) || OB_ISNULL(ctx_->alloc_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition",
K(ret), K(has_lob_header_), K(is_outrow_), KP(ctx_->session_), KP(ctx_));
} else if (OB_ISNULL(lob_mngr)) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN, "Lob: get lob manager failed.", K(ret));
} else { // outrow persist lob
storage::ObLobAccessParam param;
if (OB_SUCC(init_lob_access_param(param, ctx_, cs_type_, allocator))) {
param.len_ = (ctx_->total_access_len_ == 0 ? param.byte_size_ : ctx_->total_access_len_);
if (!param.ls_id_.is_valid() || !param.tablet_id_.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid param.", K(ret), K(param));
} else if (param.byte_size_ < 0 || param.len_ == 0) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN,"Lob: calc byte size is negative.", K(ret), K(param));
} else if (param.byte_size_ > OB_MAX_LONGTEXT_LENGTH) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN,"Lob: unable to read full data over 512M lob.", K(ret), K(param));
} else {
ctx_->total_byte_len_ = param.byte_size_;
ctx_->buff_byte_len_ = static_cast<uint32_t>(param.byte_size_);//TODO(gehao.wh): check convert from 64 to 32
ctx_->buff_ = static_cast<char *>(ctx_->alloc_->alloc(ctx_->buff_byte_len_));
ObString output_data;
if (OB_ISNULL(ctx_->buff_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
COMMON_LOG(WARN,"Lob: failed to alloc output buffer",
K(ret), KP(ctx_->buff_), K(ctx_->buff_byte_len_));
} else {
output_data.assign_buffer(ctx_->buff_, ctx_->buff_byte_len_);
if (OB_FAIL(lob_mngr->query(param, output_data))) {
COMMON_LOG(WARN,"Lob: falied to query lob tablets.", K(ret), K(param));
} else {
ctx_->content_byte_len_ = output_data.length();
// Notice: content_len_ (char len) is not updated!
COMMON_LOG(DEBUG,"Lob: read output for obstring iter.", K(output_data));
}
}
}
}
}
return ret;
}
int ObTextStringIter::get_outrow_prefix_data(uint32_t prefix_char_len)
{
int ret = OB_SUCCESS;
storage::ObLobManager* lob_mngr = MTL(storage::ObLobManager*);
if (!has_lob_header_ || !is_outrow_ || OB_ISNULL(ctx_) || OB_ISNULL(ctx_->alloc_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition",
K(ret), K(has_lob_header_), K(is_outrow_), KP(ctx_->session_), KP(ctx_));
} else if (OB_ISNULL(lob_mngr)) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN, "Lob: get lob manager failed.", K(ret));
} else { // outrow persist lob
storage::ObLobAccessParam param;
if (OB_SUCC(init_lob_access_param(param, ctx_, cs_type_))) {
param.len_ = prefix_char_len;
if (!param.ls_id_.is_valid() || !param.tablet_id_.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid param.", K(ret), K(param));
} else if (param.byte_size_ < 0 || param.len_ == 0) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN,"Lob: calc byte size is negative.", K(ret), K(param));
} else {
ctx_->total_byte_len_ = param.byte_size_;
ctx_->buff_byte_len_ = prefix_char_len * MAX_CHAR_MULTIPLIER;
ctx_->buff_ = static_cast<char *>(ctx_->alloc_->alloc(ctx_->buff_byte_len_));
ObString output_data;
if (OB_ISNULL(ctx_->buff_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
COMMON_LOG(WARN,"Lob: failed to alloc output buffer",
K(ret), KP(ctx_->buff_), K(ctx_->buff_byte_len_));
} else {
output_data.assign_buffer(ctx_->buff_, ctx_->buff_byte_len_);
if (OB_FAIL(lob_mngr->query(param, output_data))) {
COMMON_LOG(WARN,"Lob: falied to query lob tablets.", K(ret), K(param));
} else {
ctx_->content_byte_len_ = output_data.length();
// Notice: content_len_ (char len) is not updated!
COMMON_LOG(DEBUG,"Lob: read output for obstring iter.", K(output_data));
}
}
}
}
}
return ret;
}
int ObTextStringIter::get_current_block(ObString &str)
{
int ret = OB_SUCCESS;
if (!is_init_) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter not initiated", K(ret));
} else if (state_ <= TEXTSTRING_ITER_INIT) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter not accessed", K(ret));
} else {
str.assign(ctx_->buff_, static_cast<int32_t>(ctx_->content_byte_len_));
}
return ret;
}
int ObTextStringIter::get_full_data(ObString &data_str, ObIAllocator *allocator)
{
int ret = OB_SUCCESS;
if (!is_init_ || state_ != TEXTSTRING_ITER_INIT) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter state error", K(ret), K(is_init_), K(state_));
} else if (datum_str_.length() == 0) { // maybe from datum->is_nop/is_null
data_str.assign(NULL, 0);
COMMON_LOG(DEBUG, "Lob: iter with null input", K(ret), K(*this));
} else if (!is_lob_ || !has_lob_header_) { // string types or 4.0 compatiable text
data_str.assign_ptr(datum_str_.ptr(), datum_str_.length());
} else if (!is_outrow_) { // inrow lob
ObLobLocatorV2 loc(datum_str_, has_lob_header_);
if (OB_FAIL(loc.get_inrow_data(data_str))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
}
} else {
// outrow lob, read full data into a inrow local tmp lob currently
if (OB_FAIL(get_outrow_lob_full_data(allocator))) {
COMMON_LOG(WARN, "Lob: get lob outrow data failed", K(ret));
} else {
data_str.assign_ptr(ctx_->buff_, ctx_->content_byte_len_);
}
}
if (OB_SUCC(ret)) {
state_ = TEXTSTRING_ITER_NEXT;
}
COMMON_LOG(DEBUG, "Lob: get_full_data", K(ret), K(data_str), KP(data_str.ptr()), K(data_str.length()));
return ret;
}
// Notice: always get full data for string tc & inrow lobs
int ObTextStringIter::get_inrow_or_outrow_prefix_data(ObString &data_str, uint32_t prefix_char_len)
{
int ret = OB_SUCCESS;
if (!is_init_ || state_ != TEXTSTRING_ITER_INIT) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter state error", K(ret), K(is_init_), K(state_));
} else if (datum_str_.length() == 0) {
data_str.assign(NULL, 0);
COMMON_LOG(DEBUG, "Lob: iter with null input", K(ret), K(*this));
} else if (!is_lob_ || !has_lob_header_) { // string types
data_str.assign_ptr(datum_str_.ptr(), datum_str_.length());
} else if (!is_outrow_) { // inrow lob
ObLobLocatorV2 loc(datum_str_, has_lob_header_);
if (OB_FAIL(loc.get_inrow_data(data_str))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
}
} else {
// outrow lob, read full data into a inrow local tmp lob currently
if (OB_FAIL(get_outrow_prefix_data(prefix_char_len))) {
COMMON_LOG(WARN, "Lob: get lob outrow prefix failed", K(ret), K(prefix_char_len));
} else {
data_str.assign_ptr(ctx_->buff_, ctx_->content_byte_len_);
}
}
if (OB_SUCC(ret)) {
state_ = TEXTSTRING_ITER_NEXT;
}
COMMON_LOG(DEBUG, "Lob: get_inrow_or_outrow_prefix_data",
K(ret), K(data_str), KP(data_str.ptr()), K(data_str.length()));
return ret;
}
void ObTextStringIter::reset()
{
if(!is_init_) {
} else if (is_lob_ && OB_NOT_NULL(ctx_)) {
// Notice: memory of ctx_ itself will be released when allocator destruction
ctx_->reuse();
}
state_ = TEXTSTRING_ITER_INIT;
}
int ObTextStringIter::get_first_block(ObString &str)
{
int ret = OB_SUCCESS;
storage::ObLobManager* lob_mngr = MTL(storage::ObLobManager*);
if (!is_outrow_ || OB_ISNULL(ctx_) || !has_lob_header_) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition",
K(ret), K(is_outrow_), KP(ctx_), K(has_lob_header_));
} else if (OB_ISNULL(lob_mngr)) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN, "Lob: get lob manager failed.", K(ret));
} else {
storage::ObLobAccessParam param;
if (OB_SUCC(init_lob_access_param(param, ctx_, cs_type_))) {
param.scan_backward_ = ctx_->is_backward_;
param.offset_ = ctx_->start_offset_;
param.len_ = (ctx_->total_access_len_ == 0 ? param.byte_size_ : ctx_->total_access_len_);
// update buffer len according to reserve length config
ctx_->total_byte_len_ = param.byte_size_;
if (ctx_->reserved_byte_len_ > 0 || ctx_->reserved_len_ > 0) {
int64_t max_reserved_byte = MAX(ctx_->reserved_byte_len_, ctx_->reserved_len_ * MAX_CHAR_MULTIPLIER);
if (ctx_->buff_byte_len_ < max_reserved_byte) {
COMMON_LOG(INFO,"Lob: buffer size changed due to configurations",
K(ctx_->buff_byte_len_), K(ctx_->reserved_byte_len_),
K(ctx_->reserved_len_), K(max_reserved_byte));
ctx_->buff_byte_len_ = static_cast<uint32_t>(max_reserved_byte);
}
}
if (!param.ls_id_.is_valid() || !param.tablet_id_.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid param.", K(ret), K(param));
} else if (param.byte_size_ < 0 || param.len_ == 0) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN,"Lob: calc byte size is negative.", K(ret), K(param));
} else {
if (OB_ISNULL(ctx_->buff_)) {
ctx_->buff_ = static_cast<char *>(ctx_->alloc_->alloc(ctx_->buff_byte_len_));
}
ObString output_data;
output_data.assign_buffer(ctx_->buff_, ctx_->buff_byte_len_);
// 1. start query iter, and query one time
// 2. update access param
if (OB_ISNULL(ctx_->buff_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
COMMON_LOG(WARN,"Lob: failed to alloc output buffer",
K(ret), KP(ctx_->buff_), K(ctx_->buff_byte_len_));
} else if (OB_FAIL(lob_mngr->query(param, ctx_->lob_query_iter_))) {
COMMON_LOG(WARN,"Lob: falied to query lob iter.", K(ret), K(param));
} else if (OB_FAIL(ctx_->lob_query_iter_->get_next_row(output_data))) {
COMMON_LOG(WARN,"Lob: falied to get first block.", K(ret), K(param));
} else {
ctx_->content_byte_len_ = output_data.length();
// ToDo: @gehao get char len directly from lob mngr ?
ctx_->content_len_ = static_cast<uint32_t>(ObCharset::strlen_char(cs_type_,
output_data.ptr(),
static_cast<int64_t>(output_data.length())));
ctx_->last_accessed_byte_len_ = 0;
ctx_->last_accessed_len_ = 0;
ctx_->accessed_byte_len_ = ctx_->content_byte_len_;
ctx_->accessed_len_ = ctx_->content_len_;
ctx_->iter_count_++;
str.assign_ptr(ctx_->buff_, ctx_->content_byte_len_);
state_ = TEXTSTRING_ITER_NEXT;
}
}
}
}
return ret;
}
int ObTextStringIter::reserve_data()
{
int ret = OB_SUCCESS;
if (!is_outrow_ || !has_lob_header_ || OB_ISNULL(ctx_) || OB_ISNULL(ctx_->lob_query_iter_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition", K(ret), K(is_outrow_), K(has_lob_header_), KP(ctx_));
} else if (ctx_->reserved_len_ == 0 && ctx_->reserved_byte_len_ == 0) {
// do nothing
} else if (ctx_->accessed_byte_len_ == ctx_->total_byte_len_) {
// 1. already the last block, should get iter end;
// 2. if not the last block, this function fail if access_len_ < reserved_len_
} else if (ctx_->reserved_len_ != 0) {
// reserve_char_data()
if (cs_type_ == CS_TYPE_BINARY) {
ctx_->reserved_byte_len_ = ctx_->reserved_len_;
} else if (ctx_->reserved_len_ > ctx_->content_len_) {
ret = OB_SIZE_OVERFLOW;
COMMON_LOG(WARN, "Lob: reserved length oversized", K(ret), K(*ctx_));
} else if (!ctx_->is_backward_) {
uint32 reserved_char_start = ctx_->content_len_ - ctx_->reserved_len_;
uint32 reserved_char_pos =
static_cast<uint32_t>(ObCharset::charpos(cs_type_, ctx_->buff_, ctx_->content_byte_len_, reserved_char_start));
ctx_->reserved_byte_len_ = ctx_->content_byte_len_ - reserved_char_pos;
MEMMOVE(ctx_->buff_, ctx_->buff_ + reserved_char_pos, ctx_->reserved_byte_len_);
} else if (ctx_->is_backward_) {
uint32 reserved_char_end = ctx_->reserved_len_ + 1;
uint32 reserved_char_end_pos =
static_cast<uint32_t>(ObCharset::charpos(cs_type_, ctx_->buff_, ctx_->content_byte_len_, reserved_char_end));
ctx_->reserved_byte_len_ = reserved_char_end_pos;
MEMMOVE(ctx_->buff_ + ctx_->content_byte_len_ - ctx_->reserved_byte_len_,
ctx_->buff_,
ctx_->reserved_byte_len_);
} else {}
} else if (ctx_->reserved_byte_len_ != 0) {
if (OB_FAIL(reserve_byte_data())) {
COMMON_LOG(WARN, "Lob: reserved byte data failed", K(ret), K(*ctx_));
}
}
return ret;
}
int ObTextStringIter::reserve_byte_data()
{
int ret = OB_SUCCESS;
if (ctx_->reserved_byte_len_ > ctx_->content_byte_len_) {
ret = OB_SIZE_OVERFLOW;
COMMON_LOG(WARN, "Lob: reserved byte length oversized", K(ret), K(*ctx_));
} else if (!ctx_->is_backward_) {
uint32 reserved_byte_start = ctx_->content_byte_len_ - ctx_->reserved_byte_len_;
MEMMOVE(ctx_->buff_, ctx_->buff_ + reserved_byte_start, ctx_->reserved_byte_len_);
} else if (ctx_->is_backward_) {
MEMMOVE(ctx_->buff_ + ctx_->content_byte_len_ - ctx_->reserved_byte_len_,
ctx_->buff_,
ctx_->reserved_byte_len_);
} else {}
return ret;
}
int ObTextStringIter::get_next_block_inner(ObString &str)
{
// 1. calc reserved len and memmove
// 2. update query buffer and query agin
// 3. update access param
int ret = OB_SUCCESS;
if (!is_outrow_ || !has_lob_header_ || OB_ISNULL(ctx_) || OB_ISNULL(ctx_->lob_query_iter_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition",
K(ret), K(is_outrow_), K(has_lob_header_), KP(ctx_));
} else if (ctx_->content_byte_len_ == 0) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: no data", K(ret), K(is_outrow_), KP(ctx_));
} else if (OB_FAIL(reserve_data())) {
COMMON_LOG(WARN, "Lob: reserve_data failed", K(ret), K(is_outrow_), KP(ctx_));
} else {
ObString output_data;
if (!ctx_->is_backward_) {
output_data.assign_buffer(ctx_->buff_ + ctx_->reserved_byte_len_,
ctx_->buff_byte_len_ - ctx_->reserved_byte_len_);
} else {
output_data.assign_buffer(ctx_->buff_,
ctx_->buff_byte_len_ - ctx_->reserved_byte_len_);
}
if (OB_FAIL(ctx_->lob_query_iter_->get_next_row(output_data))) {
if (ret == OB_ITER_END) {
state_ = TEXTSTRING_ITER_END; // iter finished
ctx_->lob_query_iter_->reset();
OB_DELETE(ObLobQueryIter, "unused", ctx_->lob_query_iter_);
ctx_->lob_query_iter_ = NULL;
ret = OB_SUCCESS;
} else {
COMMON_LOG(WARN,"Lob: falied to get first block.", K(ret));
}
} else {
ctx_->content_byte_len_ = ctx_->reserved_byte_len_ + output_data.length();
// ToDo: @gehao get directly from lob mngr ?
uint32 cur_out_len = static_cast<uint32_t>(ObCharset::strlen_char(cs_type_,
output_data.ptr(),
static_cast<int64_t>(output_data.length())));
ctx_->content_len_ = ctx_->reserved_len_ + cur_out_len;
ctx_->last_accessed_byte_len_ = ctx_->accessed_byte_len_;
ctx_->last_accessed_len_ = ctx_->accessed_len_;
ctx_->accessed_byte_len_ += output_data.length();
ctx_->accessed_len_ += cur_out_len;\
ctx_->iter_count_++;
str.assign_ptr(ctx_->buff_, ctx_->content_byte_len_);
}
}
return ret;
}
ObTextStringIterState ObTextStringIter::get_next_block(ObString &str)
{
int ret = OB_SUCCESS;
str.reset();
if (!is_init_ || state_ < TEXTSTRING_ITER_INIT) {
state_ = TEXTSTRING_ITER_INVALID;
COMMON_LOG(WARN, "Lob: iter not initiated", K(ret), K(*this));
} else if (!is_lob_ || !is_outrow_ || !has_lob_header_) { // if not outrow lob, get full data
switch (state_) {
case TEXTSTRING_ITER_INIT: {
OZ(get_full_data(str));
break;
}
case TEXTSTRING_ITER_NEXT: {
state_ = TEXTSTRING_ITER_END;
break;
}
default: {
COMMON_LOG(WARN, "Lob: error state for common string or inrow lob", K(state_));
break;
}
}
} else if (is_outrow_) {
switch (state_) {
case TEXTSTRING_ITER_INIT: {
OZ(get_first_block(str));
break;
}
case TEXTSTRING_ITER_NEXT: {
OZ(get_next_block_inner(str));
break;
}
default: {
COMMON_LOG(WARN, "Lob: error state for common string or inrow lob", K(state_));
break;
}
}
} else {
COMMON_LOG(WARN, "Lob: error case in of iter", K(ret), K(*this));
state_ = TEXTSTRING_ITER_INVALID;
}
if (OB_FAIL(ret)) {
COMMON_LOG(WARN, "Lob: iter get_next_block failed", K(ret), K(*this));
state_ = TEXTSTRING_ITER_INVALID;
err_ret_ = ret;
}
return state_;
}
void ObTextStringIter::set_start_offset(uint64_t offset)
{
if (is_valid_for_config()) {
ctx_->start_offset_ = offset;
}
}
void ObTextStringIter::set_access_len(int64_t char_len)
{
if (is_valid_for_config()) {
ctx_->total_access_len_ = char_len;
}
}
void ObTextStringIter::set_reserved_len(uint32_t reserved_len)
{
if (is_valid_for_config()) {
ctx_->reserved_len_ = reserved_len;
ctx_->reserved_byte_len_ = 0;
}
}
void ObTextStringIter::set_reserved_byte_len(uint32_t reserved_byte_len)
{
if (is_valid_for_config()) {
ctx_->reserved_byte_len_ = reserved_byte_len;
ctx_->reserved_len_ = 0;
}
}
void ObTextStringIter::reset_reserve_len()
{
if (is_valid_for_config()) {
ctx_->reserved_byte_len_ = 0;
ctx_->reserved_len_ = 0;
}
}
void ObTextStringIter::set_backward()
{
if (is_valid_for_config()) {
ctx_->is_backward_ = true;
}
}
void ObTextStringIter::set_forward()
{
if (is_valid_for_config()) {
ctx_->is_backward_ = false;
}
}
uint64_t ObTextStringIter::get_start_offset()
{
uint64_t start_offset = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
start_offset = ctx_->start_offset_;
}
return start_offset;
}
uint32_t ObTextStringIter::get_last_accessed_len()
{
uint32_t last_accessed_len = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
last_accessed_len = ctx_->last_accessed_len_;
}
return last_accessed_len;
}
uint32_t ObTextStringIter::get_iter_count()
{
uint32_t iter_count = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
iter_count = ctx_->iter_count_;
}
return iter_count;
}
uint32_t ObTextStringIter::get_reserved_char_len()
{
uint32_t reserved_char_len = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
reserved_char_len = ctx_->reserved_len_;
}
return reserved_char_len;
}
uint32_t ObTextStringIter::get_reserved_byte_len()
{
uint32_t reserved_byte_len = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
reserved_byte_len = ctx_->reserved_byte_len_;
}
return reserved_byte_len;
}
uint32_t ObTextStringIter::get_last_accessed_byte_len()
{
uint32_t last_accessed_byte_len = 0;
if (!is_init_ || !is_outrow_ || !has_lob_header_
|| state_ <= TEXTSTRING_ITER_INIT || OB_ISNULL(ctx_)) {
} else {
last_accessed_byte_len = ctx_->last_accessed_byte_len_;
}
return last_accessed_byte_len;
}
uint32_t ObTextStringIter::get_accessed_len()
{
int32 ret = OB_SUCCESS;
uint32_t accessed_len = 0;
if (!is_init_ || state_ <= TEXTSTRING_ITER_INIT) {
} else if (!is_lob_ || !is_outrow_ || !has_lob_header_) { // string types
int64_t total_char_len = 0;
if (OB_FAIL(get_char_len(total_char_len))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
} else {
accessed_len = static_cast<uint32_t>(total_char_len);
}
} else if (is_outrow_) {
accessed_len = ctx_->accessed_len_;
} else { // should not come here.
ret = OB_UNEXPECT_INTERNAL_ERROR;
COMMON_LOG(WARN, "Lob: get access len failed", K(ret), K(*this), K(lbt()));
}
return accessed_len;
}
uint32_t ObTextStringIter::get_accessed_byte_len()
{
int32 ret = OB_SUCCESS;
uint32_t accessed_byte_len = 0;
if (!is_init_ || state_ <= TEXTSTRING_ITER_INIT) {
} else if (!is_lob_ || !is_outrow_ || !has_lob_header_) { // string types
int64_t total_byte_len = 0;
if (OB_FAIL(get_byte_len(total_byte_len))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
} else {
accessed_byte_len = static_cast<uint32_t>(total_byte_len);
}
} else if (is_outrow_) {
accessed_byte_len = ctx_->accessed_byte_len_;
} else { // should not come here.
ret = OB_UNEXPECT_INTERNAL_ERROR;
COMMON_LOG(WARN, "Lob: get access len failed", K(ret), K(*this), K(lbt()));
}
return accessed_byte_len;
}
int ObTextStringIter::get_byte_len(int64_t &byte_len)
{
int ret = OB_SUCCESS;
if (!is_init_) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter state error", K(ret), K(is_init_), K(state_));
} else if (!is_lob_ || !is_outrow_ || !has_lob_header_) {
ObString data_str = datum_str_;
if (is_lob_ && has_lob_header_) {
ObLobLocatorV2 loc(data_str, has_lob_header_);
if (OB_FAIL(loc.get_inrow_data(data_str))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
}
}
byte_len = data_str.length();
} else { // outrow lob
if (OB_ISNULL(ctx_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter state error", K(ret), K(is_init_), K(state_), K(ctx_));
} else if (!ctx_->locator_.is_persist_lob()) {
ret = OB_NOT_IMPLEMENT;
COMMON_LOG(WARN, "Lob: outrow temp lob is not implement", K(ret), K(ctx_->locator_));
} else if (OB_FAIL(ctx_->locator_.get_lob_data_byte_len(byte_len))) {
// if buffer length is zero, use lob byte length
COMMON_LOG(WARN, "Lob: get outrow lob byte len failed.", K(ret), K(ctx_->buff_byte_len_));
}
}
return ret;
}
int ObTextStringIter::get_char_len(int64_t &char_length)
{
int ret = OB_SUCCESS;
if (!is_init_) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: iter state error", K(ret), K(is_init_), K(state_));
} else if (!is_lob_ || !is_outrow_ || !has_lob_header_) {
ObString data_str = datum_str_;
if (is_lob_ && has_lob_header_) {
ObLobLocatorV2 loc(data_str, has_lob_header_);
if (OB_FAIL(loc.get_inrow_data(data_str))) {
COMMON_LOG(WARN, "Lob: get lob inrow data failed", K(ret));
}
}
char_length = ObCharset::strlen_char(cs_type_, data_str.ptr(), static_cast<int64_t>(data_str.length()));
} else { // outrow lob
ObString disk_loc_str;
storage::ObLobManager* lob_mngr = MTL(storage::ObLobManager*);
if (OB_ISNULL(ctx_)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: error condition", K(ret), K(is_outrow_), KP(ctx_->session_), KP(ctx_));
} else if (OB_ISNULL(lob_mngr)) {
ret = OB_ERR_UNEXPECTED;
COMMON_LOG(WARN, "Lob: get lob manager failed.", K(ret));
} else {
storage::ObLobAccessParam param;
if (OB_SUCC(init_lob_access_param(param, ctx_, cs_type_))) {
uint64_t length = 0;
if (!param.ls_id_.is_valid() || !param.tablet_id_.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid param.", K(ret), K(param));
} else if (OB_FAIL(lob_mngr->getlength(param, length))) {
COMMON_LOG(WARN,"Lob: falied to get outrow lob char len.", K(ret), K(param));
} else {
char_length = static_cast<int64_t>(length);
}
}
}
}
return ret;
}
// Only used to response client, append full lob data after outrow lob locator, disk locator is not changed
int ObTextStringIter::append_outrow_lob_fulldata(ObObj &obj,
const sql::ObBasicSessionInfo *session,
ObIAllocator &allocator)
{
int ret = OB_SUCCESS;
ObObjType type = obj.get_type();
ObString raw_string = obj.get_string();
int64_t lob_data_byte_len = 0;
int64_t res_byte_len = 0;
int64_t pos = 0;
char *buff = NULL;
if (!obj.has_lob_header()) {
} else if (!is_lob_storage(type)) {
} else if (obj.is_null() || obj.is_nop_value()) {
} else {
bool data_changed = false;
ObLobLocatorV2 loc(obj.get_string(), obj.has_lob_header());
if (!loc.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid lob locator", K(ret), K(obj));
} else if (loc.is_delta_temp_lob()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: converting delta lob!", K(ret));
} else if (loc.has_inrow_data()) {
int64_t real_loc_len = 0;
if (OB_FAIL(loc.get_real_locator_len(real_loc_len))) {
COMMON_LOG(WARN, "Lob: failed to get real locator len", K(loc));
} else {
raw_string.assign_ptr(raw_string.ptr(), real_loc_len);
data_changed = true; // should be old lob data from client, need refresh lobdata
}
}
if (OB_FAIL(ret)) { // do noting
} else if (loc.is_inrow() && !data_changed) { // do nothing
} else if (OB_FAIL(loc.get_lob_data_byte_len(lob_data_byte_len))) {
COMMON_LOG(WARN, "Lob: failed to get lob data byte length", K(ret), K(obj));
} else if (OB_FALSE_IT((res_byte_len = lob_data_byte_len + raw_string.length()))) {
} else if (res_byte_len > UINT32_MAX) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: inrow lob data too long",
K(raw_string.length()), K(lob_data_byte_len));
} else if (OB_ISNULL((buff = static_cast<char *>(allocator.alloc(res_byte_len))))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
COMMON_LOG(WARN,"Lob: failed to alloc res buffer",
K(raw_string.length()), K(lob_data_byte_len));
} else {
// copy mem lob locator
MEMCPY(buff, raw_string.ptr(), raw_string.length());
pos += raw_string.length();
// config mem lob locator
ObMemLobCommon *mem_loc = reinterpret_cast<ObMemLobCommon *>(buff);
mem_loc->set_has_inrow_data(true); // Notice: inrow flag in disk locator ObLobCommon is still outrow!
if (!mem_loc->has_extern() || pos < sizeof(ObLobLocator)) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN,"Lob: invalid mem locator", K(*mem_loc), K(pos));
} else {
ObMemLobExternHeader *mem_loc_extern = reinterpret_cast<ObMemLobExternHeader *>(mem_loc->data_);
mem_loc_extern->payload_offset_ = static_cast<uint32_t>(pos - sizeof(ObLobLocator));
mem_loc_extern->payload_size_ = static_cast<uint32_t>(lob_data_byte_len);
// copy inrow data
ObTextStringIterState state;
ObString src_block_data;
ObTextStringIter instr_iter(obj);
if (OB_FAIL(instr_iter.init(0, session, &allocator))) {
COMMON_LOG(WARN, "Lob: init text string iter failed", K(instr_iter));
} else {
while (OB_SUCC(ret)
&& pos < res_byte_len
&& (state = instr_iter.get_next_block(src_block_data)) == TEXTSTRING_ITER_NEXT) {
MEMCPY(buff + pos, src_block_data.ptr(), src_block_data.length());
pos += src_block_data.length();
}
OB_ASSERT(pos == res_byte_len);
obj.set_lob_value(obj.get_type(), buff, static_cast<int32_t>(res_byte_len));
obj.set_has_lob_header(); // must has lob header
}
}
}
}
return ret;
}
// Notice: if input is an outrow lob, the result will be a templob!
int ObTextStringIter::convert_outrow_lob_to_inrow_templob(const ObObj &in_obj,
ObObj &out_obj,
const sql::ObBasicSessionInfo *session,
ObIAllocator *allocator,
bool allow_persist_inrow,
bool need_deep_copy)
{
int ret = OB_SUCCESS;
ObObjType type = in_obj.get_type();
int64_t lob_data_byte_len = 0;
int64_t pos = 0;
bool is_pass_thougth = true;
if (!in_obj.has_lob_header()) {
} else if (!is_lob_storage(type)) {
} else if (in_obj.is_null() || in_obj.is_nop_value()) {
} else {
ObLobLocatorV2 loc(in_obj.get_string(), in_obj.has_lob_header());
if (!loc.is_valid()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: invalid lob loc", K(ret), K(loc), K(in_obj));
} else if ((!loc.is_persist_lob() || allow_persist_inrow) &&
(loc.is_inrow() || loc.is_simple())) { // do nothing
} else if (loc.is_delta_temp_lob()) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: converting delta lob!", K(ret));
} else if (OB_FAIL(loc.get_lob_data_byte_len(lob_data_byte_len))) {
COMMON_LOG(WARN, "Lob: failed to get lob data byte length", K(ret), K(in_obj));
} else if (lob_data_byte_len < 0 || lob_data_byte_len > UINT32_MAX) {
ret = OB_INVALID_ARGUMENT;
COMMON_LOG(WARN, "Lob: inrow lob data length error", K(lob_data_byte_len));
} else {
is_pass_thougth = false;
ObTextStringResult new_tmp_lob(in_obj.get_type(), in_obj.has_lob_header(), allocator);
if (OB_FAIL(new_tmp_lob.init(lob_data_byte_len))) {
COMMON_LOG(WARN, "Lob: init tmp lob failed", K(ret), K(lob_data_byte_len));
} else {
// copy inrow data
ObTextStringIterState state;
ObString src_block_data;
ObTextStringIter instr_iter(in_obj);
if (OB_FAIL(ret)) {
} else if (OB_FAIL(instr_iter.init(0, session, allocator))) {
COMMON_LOG(WARN, "Lob: init text string iter failed", K(instr_iter));
} else {
while (OB_SUCC(ret)
&& pos < lob_data_byte_len
&& (state = instr_iter.get_next_block(src_block_data)) == TEXTSTRING_ITER_NEXT) {
if (OB_FAIL(new_tmp_lob.append(src_block_data))) {
COMMON_LOG(WARN, "Lob: tmp lob append failed",
K(ret), K(lob_data_byte_len), K(pos), K(src_block_data), K(new_tmp_lob));
} else {
pos += src_block_data.length();
}
}
OB_ASSERT(pos == lob_data_byte_len);
ObString res;
new_tmp_lob.get_result_buffer(res);
out_obj = in_obj; // copy meta
out_obj.set_lob_value(in_obj.get_type(), res.ptr(), res.length());
out_obj.set_has_lob_header(); // must has lob header
}
}
}
if (OB_SUCC(ret) && is_pass_thougth) {
if (need_deep_copy) {
if (OB_FAIL(ob_write_obj(*allocator, in_obj, out_obj))) {
LOG_WARN("do deepy copy obj failed.", K(ret), K(in_obj));
}
} else {
out_obj = in_obj;
}
}
}
return ret;
}
// ----- implementations of ObTextStringResult -----
int ObTextStringResult::calc_buffer_len(int64_t res_len)
{
int ret = OB_SUCCESS;
if (!(is_lob_storage(type_))) { // tinytext no has lob header
buff_len_ = res_len;
} else {
if (!has_lob_header_) {
buff_len_ = res_len;
} else if (res_len < OB_MAX_LONGTEXT_LENGTH - MAX_TMP_LOB_HEADER_LEN) {
// inrow lob with lob header
bool has_extern = lib::is_oracle_mode(); // even oracle may not need extern for temp data
ObMemLobExternFlags extern_flags(has_extern);
res_len += sizeof(ObLobCommon);
buff_len_ = ObLobLocatorV2::calc_locator_full_len(extern_flags, 0, static_cast<uint32_t>(res_len), false);
} else {
ret = OB_NOT_SUPPORTED;
LOG_WARN("Lob: out row temp lob not implemented, not support length bigger than 512M",
K(ret), K(this), K(pos_), K(buff_len_), K(res_len));
}
}
return ret;
}
int ObTextStringResult::fill_temp_lob_header(const int64_t res_len)
{
int ret = OB_SUCCESS;
if (!has_lob_header_) { // do nothing
} else if (OB_ISNULL(buffer_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("Lob: allocate memory for lob result failed", K(type_), K(buff_len_), K(ret));
} else if (!(is_lob_storage(type_))) { // do nothing
} else if (res_len <= OB_MAX_LONGTEXT_LENGTH - MAX_TMP_LOB_HEADER_LEN) {
ObLobLocatorV2 locator(buffer_, static_cast<uint32_t>(buff_len_), has_lob_header_);
// temp lob in oracle mode not need extern neither, for it does not have rowkey
// However we mock extern failed in case of return it to old client
ObMemLobExternFlags extern_flags(lib::is_oracle_mode());
ObString rowkey_str;
ObString empty_str;
ObLobCommon lob_common;
if (OB_FAIL(locator.fill(TEMP_FULL_LOB,
extern_flags,
rowkey_str,
&lob_common,
static_cast<uint32_t>(res_len + sizeof(ObLobCommon)),
0,
false))) {
LOG_WARN("Lob: fill temp lob locator failed", K(type_), K(ret));
} else if (OB_FAIL((locator.set_payload_data(&lob_common, empty_str)))) {
LOG_WARN("Lob: set temp lob locator payload failed", K(type_), K(ret));
}
pos_ = buff_len_ - res_len; // only res_len could be used later
} else { // outrow
ret = OB_NOT_IMPLEMENT;
LOG_WARN("Lob: out row temp lob not implemented", K(this), K(pos_), K(buff_len_), K(ret));
}
return ret;
}
int ObTextStringResult::init(int64_t res_len, ObIAllocator *allocator)
{
int ret = OB_SUCCESS;
if (OB_NOT_NULL(buffer_) || is_init_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: textstring result init already", K(ret), K(*this));
} else if (!(ob_is_string_or_lob_type(type_) || is_lob_storage(type_))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: unexpected expr result type for textstring result", K(ret), K(type_));
} else if (OB_FAIL(calc_buffer_len(res_len))) {
LOG_WARN("fail to calc buffer len", K(ret), K(res_len));
} else if (buff_len_ == 0) {
OB_ASSERT(has_lob_header_ == false); // empty result without header
} else {
buffer_ = OB_ISNULL(allocator)
? (char *)alloc_->alloc(buff_len_) : (char *)allocator->alloc(buff_len_);
if (OB_ISNULL(buffer_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("Lob: allocation failed", K(ret), K(type_), K(buff_len_));
} else if (OB_FAIL(fill_temp_lob_header(res_len))) { // string types will not fill lob header
LOG_WARN("Lob: fill_temp_lob_header failed", K(ret), K(type_));
}
}
if (OB_SUCC(ret)) {
is_init_ = true;
}
return ret;
}
int ObTextStringResult::copy(const ObLobLocatorV2 *loc)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(loc) || !loc->is_valid()) {
ret = OB_INVALID_ARGUMENT;
} else if (loc->size_ == 0) {
} else {
buff_len_ = loc->size_;
buffer_ = (char *)alloc_->alloc(buff_len_);
if (OB_ISNULL(buffer_)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("Lob: allocate memory for copy locator failed", K(loc), K(loc->size_), K(ret));
} else {
MEMCPY(buffer_, loc->ptr_, buff_len_);
has_lob_header_ = loc->has_lob_header_;
}
}
return ret;
}
int ObTextStringResult::append(const char *buffer, int64_t len)
{
int ret = OB_SUCCESS;
if (!is_outrow_templob_) {
if (len == 0) {
} else if (pos_ + len > buff_len_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: append content length too long", K(pos_), K(buff_len_), K(len), K(ret));
} else {
MEMCPY(buffer_ + pos_, buffer, len);
pos_ += len;
}
} else {
ret = OB_NOT_IMPLEMENT;
LOG_WARN("Lob: out row temp lob not implemented", K(this), K(pos_), K(buff_len_), K(ret));
}
return ret;
}
int ObTextStringResult::fill(int64_t pos, int c, int64_t len)
{
int ret = OB_SUCCESS;
if (!is_outrow_templob_) {
if (len == 0) {
} else if (pos + len > buff_len_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: append content length too long", K(this), K(pos), K(len), K(ret));
} else {
MEMSET(buffer_ + pos_ + pos, c, len);
}
} else {
ret = OB_NOT_IMPLEMENT;
LOG_WARN("Lob: out row temp lob not implemented", K(this), K(pos_), K(buff_len_), K(ret));
}
return ret;
}
int ObTextStringResult::write(const char *buffer, int64_t pos, int64_t len)
{
int ret = OB_SUCCESS;
if (!is_outrow_templob_) {
if (len == 0) { // do nothing
} else if (pos + len > buff_len_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: append content length too long", K(this), K(pos), K(len), K(ret));
} else {
MEMCPY(buffer_ + pos, buffer, len);
}
} else {
ret = OB_NOT_IMPLEMENT;
LOG_WARN("Lob: out row temp lob not implemented", K(this), K(pos_), K(buff_len_), K(ret));
}
return ret;
}
// ToDo: add state for curr, or beginning, or end, adjust payload size?
int ObTextStringResult::lseek(int64_t offset, int state)
{
int ret = OB_SUCCESS;
if (pos_ + offset < 0 || pos_ + offset > buff_len_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Lob: lseek to invalid position", K(this), K(pos_), K(offset), K(state), K(ret));
} else {
pos_ += offset;
}
return ret;
}
// Notice: should move pos_ to new pos after write buffer (lseek) !
int ObTextStringResult::get_reserved_buffer(char *&empty_start, int64_t &empty_len)
{
int ret = OB_SUCCESS;
if (!is_outrow_templob_) {
empty_start = buffer_ + pos_;
empty_len = buff_len_ - pos_;
if (empty_len < 0) {
ret = OB_SIZE_OVERFLOW;
LOG_WARN("Lob: no remaining", K(this), K(pos_), K(buff_len_), K(ret));
}
} else {
ret = OB_NOT_IMPLEMENT;
LOG_WARN("Lob: out row temp lob not implemented", K(this), K(pos_), K(buff_len_), K(ret));
}
return ret;
}
int ObTextStringResult::ob_convert_obj_temporay_lob(ObObj &obj, ObIAllocator &allocator)
{
int ret = OB_SUCCESS;
ObObjType type = obj.get_type();
if (!is_lob_storage(type)) {
} else if (obj.has_lob_header()) {
ret = OB_UNEXPECT_INTERNAL_ERROR;
COMMON_LOG(WARN, "Lob: not support to convert obj has lob header to tempory lob", K(ret), K(obj));
} else if (obj.is_null() || obj.is_nop_value()) {
} else {
ObString row_str = obj.get_string();
ObTextStringResult new_tmp_lob(obj.get_type(), true, &allocator);
if (OB_FAIL(new_tmp_lob.init(row_str.length()))) {
COMMON_LOG(WARN, "Lob: init tmp lob failed", K(ret), K(row_str.length()));
} else if (OB_FAIL(new_tmp_lob.append(row_str))) {
COMMON_LOG(WARN, "Lob: append failed", K(ret), K(new_tmp_lob), K(row_str));
} else {
ObString result;
new_tmp_lob.get_result_buffer(result);
obj.set_lob_value(type, result.ptr(), static_cast<int32_t>(result.length()));
if (new_tmp_lob.has_lob_header()) {
obj.set_has_lob_header();
}
}
}
return ret;
}
int ObTextStringResult::ob_convert_datum_temporay_lob(ObDatum &datum,
const ObObjMeta &in_obj_meta,
const ObObjMeta &out_obj_meta,
ObIAllocator &allocator)
{
int ret = OB_SUCCESS;
ObObjType type = in_obj_meta.get_type();
if (!is_lob_storage(type)) {
} else if (in_obj_meta.has_lob_header()
|| !out_obj_meta.has_lob_header()
|| (in_obj_meta.get_type_class() != out_obj_meta.get_type_class())) {
ret = OB_UNEXPECT_INTERNAL_ERROR;
COMMON_LOG(WARN, "Lob: not support to convert obj has lob header to tempory lob",
K(ret), K(datum), K(in_obj_meta), K(out_obj_meta));
} else if (datum.is_null() || datum.is_nop()) {
} else {
ObString row_str = datum.get_string();
ObTextStringResult new_tmp_lob(out_obj_meta.get_type(), true, &allocator);
if (OB_FAIL(new_tmp_lob.init(row_str.length()))) {
COMMON_LOG(WARN, "Lob: init tmp lob failed", K(ret), K(row_str.length()));
} else if (OB_FAIL(new_tmp_lob.append(row_str))) {
COMMON_LOG(WARN, "Lob: append failed", K(ret), K(new_tmp_lob), K(row_str));
} else {
ObString result;
new_tmp_lob.get_result_buffer(result);
datum.set_string(result);
}
}
return ret;
}
}
}
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