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mariadb/storage/rocksdb/rdb_converter.cc
Vasilii Lakhin 22efc2c784 Fix typos in C comments inside storage/
2025-03-26 16:56:50 +04:00

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/*
Copyright (c) 2015, Facebook, Inc.
This program is f
i the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
#include <my_global.h>
/* This C++ file's header file */
#include "./rdb_converter.h"
/* Standard C++ header files */
#include <algorithm>
#include <map>
#include <string>
#include <vector>
/* MySQL header files */
#include "./field.h"
#include "./key.h"
#include "./m_ctype.h"
#include "./my_bit.h"
#include "./my_bitmap.h"
#include "./sql_table.h"
/* MyRocks header files */
#include "./ha_rocksdb.h"
#include "./ha_rocksdb_proto.h"
#include "./my_stacktrace.h"
#include "./rdb_cf_manager.h"
#include "./rdb_psi.h"
#include "./rdb_utils.h"
namespace myrocks {
void dbug_modify_key_varchar8(String *on_disk_rec) {
std::string res;
// The key starts with index number
res.append(on_disk_rec->ptr(), Rdb_key_def::INDEX_NUMBER_SIZE);
// Then, a mem-comparable form of a varchar(8) value.
res.append("ABCDE\0\0\0\xFC", 9);
on_disk_rec->length(0);
on_disk_rec->append(res.data(), res.size());
}
/*
Convert field from rocksdb storage format into Mysql Record format
@param buf OUT start memory to fill converted data
@param offset IN/OUT decoded data is stored in buf + offset
@param table IN current table
@param field IN current field
@param reader IN rocksdb value slice reader
@param decode IN whether to decode current field
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_convert_to_record_value_decoder::decode(uchar *const buf, uint *offset,
TABLE *table,
my_core::Field *field,
Rdb_field_encoder *field_dec,
Rdb_string_reader *reader,
bool decode, bool is_null) {
int err = HA_EXIT_SUCCESS;
uint field_offset = field->ptr - table->record[0];
*offset = field_offset;
uint null_offset = field->null_offset();
bool maybe_null = field->real_maybe_null();
field->move_field(buf + field_offset,
maybe_null ? buf + null_offset : nullptr, field->null_bit);
if (is_null) {
if (decode) {
// This sets the NULL-bit of this record
field->set_null();
/*
Besides that, set the field value to default value. CHECKSUM TABLE
depends on this.
*/
memcpy(field->ptr, table->s->default_values + field_offset,
field->pack_length());
}
} else {
if (decode) {
// sets non-null bits for this record
field->set_notnull();
}
if (field_dec->m_field_type == MYSQL_TYPE_BLOB) {
err = decode_blob(table, field, reader, decode);
} else if (field_dec->m_field_type == MYSQL_TYPE_VARCHAR) {
err = decode_varchar(field, reader, decode);
} else {
err = decode_fixed_length_field(field, field_dec, reader, decode);
}
}
// Restore field->ptr and field->null_ptr
field->move_field(table->record[0] + field_offset,
maybe_null ? table->record[0] + null_offset : nullptr,
field->null_bit);
return err;
}
/*
Convert blob from rocksdb storage format into Mysql Record format
@param table IN current table
@param field IN current field
@param reader IN rocksdb value slice reader
@param decode IN whether to decode current field
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_convert_to_record_value_decoder::decode_blob(TABLE *table, Field *field,
Rdb_string_reader *reader,
bool decode) {
my_core::Field_blob *blob = (my_core::Field_blob *)field;
// Get the number of bytes needed to store length
const uint length_bytes = blob->pack_length() - portable_sizeof_char_ptr;
const char *data_len_str;
if (!(data_len_str = reader->read(length_bytes))) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
memcpy(blob->ptr, data_len_str, length_bytes);
uint32 data_len =
blob->get_length(reinterpret_cast<const uchar *>(data_len_str),
length_bytes);
const char *blob_ptr;
if (!(blob_ptr = reader->read(data_len))) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
if (decode) {
// set 8-byte pointer to 0, like innodb does (relevant for 32-bit
// platforms)
memset(blob->ptr + length_bytes, 0, 8);
memcpy(blob->ptr + length_bytes, &blob_ptr, sizeof(uchar **));
}
return HA_EXIT_SUCCESS;
}
/*
Convert fixed length field from rocksdb storage format into Mysql Record
format
@param field IN current field
@param field_dec IN data structure conttain field encoding data
@param reader IN rocksdb value slice reader
@param decode IN whether to decode current field
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_convert_to_record_value_decoder::decode_fixed_length_field(
my_core::Field *const field, Rdb_field_encoder *field_dec,
Rdb_string_reader *const reader, bool decode) {
uint len = field_dec->m_pack_length_in_rec;
if (len > 0) {
const char *data_bytes;
if ((data_bytes = reader->read(len)) == nullptr) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
if (decode) {
memcpy(field->ptr, data_bytes, len);
}
}
return HA_EXIT_SUCCESS;
}
/*
Convert varchar field from rocksdb storage format into Mysql Record format
@param field IN current field
@param field_dec IN data structure conttain field encoding data
@param reader IN rocksdb value slice reader
@param decode IN whether to decode current field
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_convert_to_record_value_decoder::decode_varchar(
Field *field, Rdb_string_reader *const reader, bool decode) {
my_core::Field_varstring *const field_var = (my_core::Field_varstring *)field;
const char *data_len_str;
if (!(data_len_str = reader->read(field_var->length_bytes))) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
uint data_len;
// field_var->length_bytes is 1 or 2
if (field_var->length_bytes == 1) {
data_len = (uchar)data_len_str[0];
} else {
DBUG_ASSERT(field_var->length_bytes == 2);
data_len = uint2korr(data_len_str);
}
if (data_len > field_var->field_length) {
// The data on disk is longer than table DDL allows?
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
if (!reader->read(data_len)) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
if (decode) {
memcpy(field_var->ptr, data_len_str, field_var->length_bytes + data_len);
}
return HA_EXIT_SUCCESS;
}
template <typename value_field_decoder>
Rdb_value_field_iterator<value_field_decoder>::Rdb_value_field_iterator(
TABLE *table, Rdb_string_reader *value_slice_reader,
const Rdb_converter *rdb_converter, uchar *const buf)
: m_buf(buf) {
DBUG_ASSERT(table != nullptr);
DBUG_ASSERT(buf != nullptr);
m_table = table;
m_value_slice_reader = value_slice_reader;
auto fields = rdb_converter->get_decode_fields();
m_field_iter = fields->begin();
m_field_end = fields->end();
m_null_bytes = rdb_converter->get_null_bytes();
m_offset = 0;
}
// Iterate each requested field and decode one by one
template <typename value_field_decoder>
int Rdb_value_field_iterator<value_field_decoder>::next() {
int err = HA_EXIT_SUCCESS;
while (m_field_iter != m_field_end) {
m_field_dec = m_field_iter->m_field_enc;
bool decode = m_field_iter->m_decode;
bool maybe_null = m_field_dec->maybe_null();
// This is_null value is binded to how storage format stores its value
m_is_null = maybe_null && ((m_null_bytes[m_field_dec->m_null_offset] &
m_field_dec->m_null_mask) != 0);
// Skip the bytes we need to skip
int skip = m_field_iter->m_skip;
if (skip && !m_value_slice_reader->read(skip)) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
m_field = m_table->field[m_field_dec->m_field_index];
// Decode each field
err = value_field_decoder::decode(m_buf, &m_offset, m_table, m_field,
m_field_dec, m_value_slice_reader, decode,
m_is_null);
if (err != HA_EXIT_SUCCESS) {
return err;
}
m_field_iter++;
// Only break for the field that are actually decoding rather than skipping
if (decode) {
break;
}
}
return err;
}
template <typename value_field_decoder>
bool Rdb_value_field_iterator<value_field_decoder>::end_of_fields() const {
return m_field_iter == m_field_end;
}
template <typename value_field_decoder>
Field *Rdb_value_field_iterator<value_field_decoder>::get_field() const {
DBUG_ASSERT(m_field != nullptr);
return m_field;
}
template <typename value_field_decoder>
void *Rdb_value_field_iterator<value_field_decoder>::get_dst() const {
DBUG_ASSERT(m_buf != nullptr);
return m_buf + m_offset;
}
template <typename value_field_decoder>
int Rdb_value_field_iterator<value_field_decoder>::get_field_index() const {
DBUG_ASSERT(m_field_dec != nullptr);
return m_field_dec->m_field_index;
}
template <typename value_field_decoder>
enum_field_types Rdb_value_field_iterator<value_field_decoder>::get_field_type()
const {
DBUG_ASSERT(m_field_dec != nullptr);
return m_field_dec->m_field_type;
}
template <typename value_field_decoder>
bool Rdb_value_field_iterator<value_field_decoder>::is_null() const {
DBUG_ASSERT(m_field != nullptr);
return m_is_null;
}
/*
Initialize Rdb_converter with table data
@param thd IN Thread context
@param tbl_def IN MyRocks table definition
@param table IN Current open table
*/
Rdb_converter::Rdb_converter(const THD *thd, const Rdb_tbl_def *tbl_def,
TABLE *table)
: m_thd(thd), m_tbl_def(tbl_def), m_table(table) {
DBUG_ASSERT(thd != nullptr);
DBUG_ASSERT(tbl_def != nullptr);
DBUG_ASSERT(table != nullptr);
m_key_requested = false;
m_verify_row_debug_checksums = false;
m_maybe_unpack_info = false;
m_row_checksums_checked = 0;
m_null_bytes = nullptr;
setup_field_encoders();
}
Rdb_converter::~Rdb_converter() {
my_free(m_encoder_arr);
m_encoder_arr = nullptr;
// These are needed to suppress valgrind errors in rocksdb.partition
m_storage_record.free();
}
/*
Decide storage type for each encoder
*/
void Rdb_converter::get_storage_type(Rdb_field_encoder *const encoder,
const uint kp) {
auto pk_descr =
m_tbl_def->m_key_descr_arr[ha_rocksdb::pk_index(m_table, m_tbl_def)];
// STORE_SOME uses unpack_info.
if (pk_descr->has_unpack_info(kp)) {
DBUG_ASSERT(pk_descr->can_unpack(kp));
encoder->m_storage_type = Rdb_field_encoder::STORE_SOME;
m_maybe_unpack_info = true;
} else if (pk_descr->can_unpack(kp)) {
encoder->m_storage_type = Rdb_field_encoder::STORE_NONE;
}
}
/*
@brief
Setup which fields will be unpacked when reading rows
@detail
Three special cases when we still unpack all fields:
- When client requires decode_all_fields, such as this table is being
updated (m_lock_rows==RDB_LOCK_WRITE).
- When @@rocksdb_verify_row_debug_checksums is ON (In this mode, we need to
read all fields to find whether there is a row checksum at the end. We could
skip the fields instead of decoding them, but currently we do decoding.)
- On index merge as bitmap is cleared during that operation
@seealso
Rdb_converter::setup_field_encoders()
Rdb_converter::convert_record_from_storage_format()
*/
void Rdb_converter::setup_field_decoders(const MY_BITMAP *field_map,
bool decode_all_fields) {
m_key_requested = false;
m_decoders_vect.clear();
int last_useful = 0;
int skip_size = 0;
for (uint i = 0; i < m_table->s->fields; i++) {
// bitmap is cleared on index merge, but it still needs to decode columns
bool field_requested =
decode_all_fields || m_verify_row_debug_checksums ||
bitmap_is_clear_all(field_map) ||
bitmap_is_set(field_map, m_table->field[i]->field_index);
// We only need the decoder if the whole record is stored.
if (m_encoder_arr[i].m_storage_type != Rdb_field_encoder::STORE_ALL) {
// the field potentially needs unpacking
if (field_requested) {
// the field is in the read set
m_key_requested = true;
}
continue;
}
if (field_requested) {
// We will need to decode this field
m_decoders_vect.push_back({&m_encoder_arr[i], true, skip_size});
last_useful = m_decoders_vect.size();
skip_size = 0;
} else {
if (m_encoder_arr[i].uses_variable_len_encoding() ||
m_encoder_arr[i].maybe_null()) {
// For variable-length field, we need to read the data and skip it
m_decoders_vect.push_back({&m_encoder_arr[i], false, skip_size});
skip_size = 0;
} else {
// Fixed-width field can be skipped without looking at it.
// Add appropriate skip_size to the next field.
skip_size += m_encoder_arr[i].m_pack_length_in_rec;
}
}
}
// It could be that the last few elements are varchars that just do
// skipping. Remove them.
m_decoders_vect.erase(m_decoders_vect.begin() + last_useful,
m_decoders_vect.end());
}
void Rdb_converter::setup_field_encoders() {
uint null_bytes_length = 0;
uchar cur_null_mask = 0x1;
m_encoder_arr = static_cast<Rdb_field_encoder *>(
my_malloc(PSI_INSTRUMENT_ME, m_table->s->fields * sizeof(Rdb_field_encoder), MYF(0)));
if (m_encoder_arr == nullptr) {
return;
}
for (uint i = 0; i < m_table->s->fields; i++) {
Field *const field = m_table->field[i];
m_encoder_arr[i].m_storage_type = Rdb_field_encoder::STORE_ALL;
/*
Check if this field is
- a part of primary key, and
- it can be decoded back from its key image.
If both hold, we don't need to store this field in the value part of
RocksDB's key-value pair.
If hidden pk exists, we skip this check since the field will never be
part of the hidden pk.
*/
if (!Rdb_key_def::table_has_hidden_pk(m_table)) {
KEY *const pk_info = &m_table->key_info[m_table->s->primary_key];
for (uint kp = 0; kp < pk_info->user_defined_key_parts; kp++) {
// key_part->fieldnr is counted from 1
if (field->field_index + 1 == pk_info->key_part[kp].fieldnr) {
get_storage_type(&m_encoder_arr[i], kp);
break;
}
}
}
m_encoder_arr[i].m_field_type = field->real_type();
m_encoder_arr[i].m_field_index = i;
m_encoder_arr[i].m_pack_length_in_rec = field->pack_length_in_rec();
if (field->real_maybe_null()) {
m_encoder_arr[i].m_null_mask = cur_null_mask;
m_encoder_arr[i].m_null_offset = null_bytes_length;
if (cur_null_mask == 0x80) {
cur_null_mask = 0x1;
null_bytes_length++;
} else {
cur_null_mask = cur_null_mask << 1;
}
} else {
m_encoder_arr[i].m_null_mask = 0;
}
}
// Count the last, unfinished NULL-bits byte
if (cur_null_mask != 0x1) {
null_bytes_length++;
}
m_null_bytes_length_in_record = null_bytes_length;
}
/*
EntryPoint for Decode:
Decode key slice(if requested) and value slice using built-in field
decoders
@param key_def IN key definition to decode
@param dst OUT Mysql buffer to fill decoded content
@param key_slice IN RocksDB key slice to decode
@param value_slice IN RocksDB value slice to decode
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_converter::decode(const std::shared_ptr<Rdb_key_def> &key_def,
uchar *dst, // address to fill data
const rocksdb::Slice *key_slice,
const rocksdb::Slice *value_slice) {
// Currently only support decode primary key, Will add decode secondary later
DBUG_ASSERT(key_def->m_index_type == Rdb_key_def::INDEX_TYPE_PRIMARY ||
key_def->m_index_type == Rdb_key_def::INDEX_TYPE_HIDDEN_PRIMARY);
const rocksdb::Slice *updated_key_slice = key_slice;
#ifndef DBUG_OFF
String last_rowkey;
last_rowkey.copy(key_slice->data(), key_slice->size(), &my_charset_bin);
DBUG_EXECUTE_IF("myrocks_simulate_bad_pk_read1",
{ dbug_modify_key_varchar8(&last_rowkey); });
rocksdb::Slice rowkey_slice(last_rowkey.ptr(), last_rowkey.length());
updated_key_slice = &rowkey_slice;
#endif
return convert_record_from_storage_format(key_def, updated_key_slice,
value_slice, dst);
}
/*
Decode value slice header
@param reader IN value slice reader
@param pk_def IN key definition to decode
@param unpack_slice OUT unpack info slice
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_converter::decode_value_header(
Rdb_string_reader *reader, const std::shared_ptr<Rdb_key_def> &pk_def,
rocksdb::Slice *unpack_slice) {
/* If it's a TTL record, skip the 8 byte TTL value */
if (pk_def->has_ttl()) {
const char *ttl_bytes;
if ((ttl_bytes = reader->read(ROCKSDB_SIZEOF_TTL_RECORD))) {
memcpy(m_ttl_bytes, ttl_bytes, ROCKSDB_SIZEOF_TTL_RECORD);
} else {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
}
/* Other fields are decoded from the value */
if (m_null_bytes_length_in_record &&
!(m_null_bytes = reader->read(m_null_bytes_length_in_record))) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
if (m_maybe_unpack_info) {
const char *unpack_info = reader->get_current_ptr();
if (!unpack_info || !Rdb_key_def::is_unpack_data_tag(unpack_info[0]) ||
!reader->read(Rdb_key_def::get_unpack_header_size(unpack_info[0]))) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
uint16 unpack_info_len =
rdb_netbuf_to_uint16(reinterpret_cast<const uchar *>(unpack_info + 1));
*unpack_slice = rocksdb::Slice(unpack_info, unpack_info_len);
reader->read(unpack_info_len -
Rdb_key_def::get_unpack_header_size(unpack_info[0]));
}
return HA_EXIT_SUCCESS;
}
/*
Convert RocksDb key slice and value slice to Mysql format
@param key_def IN key definition to decode
@param key_slice IN RocksDB key slice
@param value_slice IN RocksDB value slice
@param dst OUT MySql format address
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_converter::convert_record_from_storage_format(
const std::shared_ptr<Rdb_key_def> &pk_def,
const rocksdb::Slice *const key_slice,
const rocksdb::Slice *const value_slice, uchar *const dst) {
int err = HA_EXIT_SUCCESS;
Rdb_string_reader value_slice_reader(value_slice);
rocksdb::Slice unpack_slice;
err = decode_value_header(&value_slice_reader, pk_def, &unpack_slice);
if (err != HA_EXIT_SUCCESS) {
return err;
}
/*
Decode PK fields from the key
*/
if (m_key_requested) {
err = pk_def->unpack_record(m_table, dst, key_slice,
!unpack_slice.empty() ? &unpack_slice : nullptr,
false /* verify_checksum */);
}
if (err != HA_EXIT_SUCCESS) {
return err;
}
Rdb_value_field_iterator<Rdb_convert_to_record_value_decoder>
value_field_iterator(m_table, &value_slice_reader, this, dst);
// Decode value slices
while (!value_field_iterator.end_of_fields()) {
err = value_field_iterator.next();
if (err != HA_EXIT_SUCCESS) {
return err;
}
}
if (m_verify_row_debug_checksums) {
return verify_row_debug_checksum(pk_def, &value_slice_reader, key_slice,
value_slice);
}
return HA_EXIT_SUCCESS;
}
/*
Verify checksum for row
@param pk_def IN key def
@param reader IN RocksDB value slice reader
@param key IN RocksDB key slice
@param value IN RocksDB value slice
@return
0 OK
other HA_ERR error code (can be SE-specific)
*/
int Rdb_converter::verify_row_debug_checksum(
const std::shared_ptr<Rdb_key_def> &pk_def, Rdb_string_reader *reader,
const rocksdb::Slice *key, const rocksdb::Slice *value) {
if (reader->remaining_bytes() == RDB_CHECKSUM_CHUNK_SIZE &&
reader->read(1)[0] == RDB_CHECKSUM_DATA_TAG) {
uint32_t stored_key_chksum =
rdb_netbuf_to_uint32((const uchar *)reader->read(RDB_CHECKSUM_SIZE));
uint32_t stored_val_chksum =
rdb_netbuf_to_uint32((const uchar *)reader->read(RDB_CHECKSUM_SIZE));
const uint32_t computed_key_chksum =
my_core::my_checksum(0, rdb_slice_to_uchar_ptr(key), key->size());
const uint32_t computed_val_chksum =
my_core::my_checksum(0, rdb_slice_to_uchar_ptr(value),
value->size() - RDB_CHECKSUM_CHUNK_SIZE);
DBUG_EXECUTE_IF("myrocks_simulate_bad_pk_checksum1", stored_key_chksum++;);
if (stored_key_chksum != computed_key_chksum) {
pk_def->report_checksum_mismatch(true, key->data(), key->size());
return HA_ERR_ROCKSDB_CHECKSUM_MISMATCH;
}
DBUG_EXECUTE_IF("myrocks_simulate_bad_pk_checksum2", stored_val_chksum++;);
if (stored_val_chksum != computed_val_chksum) {
pk_def->report_checksum_mismatch(false, value->data(), value->size());
return HA_ERR_ROCKSDB_CHECKSUM_MISMATCH;
}
m_row_checksums_checked++;
}
if (reader->remaining_bytes()) {
return HA_ERR_ROCKSDB_CORRUPT_DATA;
}
return HA_EXIT_SUCCESS;
}
/**
Convert record from table->record[0] form into a form that can be written
into rocksdb.
@param pk_def IN Current key def
@pk_unpack_info IN Unpack info generated during key pack
@is_update_row IN Whether it is update row
@store_row_debug_checksums IN Whether to store checksums
@param ttl_bytes IN/OUT Old ttl value from previous record and
ttl value during current encode
@is_ttl_bytes_updated OUT Whether ttl bytes is updated
@param value_slice OUT Data slice with record data.
*/
int Rdb_converter::encode_value_slice(
const std::shared_ptr<Rdb_key_def> &pk_def,
const rocksdb::Slice &pk_packed_slice, Rdb_string_writer *pk_unpack_info,
bool is_update_row, bool store_row_debug_checksums, char *ttl_bytes,
bool *is_ttl_bytes_updated, rocksdb::Slice *const value_slice) {
DBUG_ASSERT(pk_def != nullptr);
// Currently only primary key will store value slice
DBUG_ASSERT(pk_def->m_index_type == Rdb_key_def::INDEX_TYPE_PRIMARY ||
pk_def->m_index_type == Rdb_key_def::INDEX_TYPE_HIDDEN_PRIMARY);
DBUG_ASSERT_IMP(m_maybe_unpack_info, pk_unpack_info);
bool has_ttl = pk_def->has_ttl();
bool has_ttl_column = !pk_def->m_ttl_column.empty();
m_storage_record.length(0);
if (has_ttl) {
/* If it's a TTL record, reserve space for 8 byte TTL value in front. */
m_storage_record.fill(
ROCKSDB_SIZEOF_TTL_RECORD + m_null_bytes_length_in_record, 0);
// NOTE: is_ttl_bytes_updated is only used for update case
// During update, skip update sk key/values slice iff none of sk fields
// have changed and ttl bytes isn't changed. see
// ha_rocksdb::update_write_sk() for more info
*is_ttl_bytes_updated = false;
char *const data = const_cast<char *>(m_storage_record.ptr());
if (has_ttl_column) {
DBUG_ASSERT(pk_def->get_ttl_field_index() != UINT_MAX);
Field *const field = m_table->field[pk_def->get_ttl_field_index()];
DBUG_ASSERT(field->pack_length_in_rec() == ROCKSDB_SIZEOF_TTL_RECORD);
DBUG_ASSERT(field->real_type() == MYSQL_TYPE_LONGLONG);
uint64 ts = uint8korr(field->ptr);
#ifndef DBUG_OFF
ts += rdb_dbug_set_ttl_rec_ts();
#endif
rdb_netbuf_store_uint64(reinterpret_cast<uchar *>(data), ts);
if (is_update_row) {
*is_ttl_bytes_updated =
memcmp(ttl_bytes, data, ROCKSDB_SIZEOF_TTL_RECORD);
}
// Also store in m_ttl_bytes to propagate to update_write_sk
memcpy(ttl_bytes, data, ROCKSDB_SIZEOF_TTL_RECORD);
} else {
/*
For implicitly generated TTL records we need to copy over the old
TTL value from the old record in the event of an update. It was stored
in m_ttl_bytes.
Otherwise, generate a timestamp using the current time.
*/
if (is_update_row) {
memcpy(data, ttl_bytes, sizeof(uint64));
} else {
uint64 ts = static_cast<uint64>(std::time(nullptr));
#ifndef DBUG_OFF
ts += rdb_dbug_set_ttl_rec_ts();
#endif
rdb_netbuf_store_uint64(reinterpret_cast<uchar *>(data), ts);
// Also store in m_ttl_bytes to propagate to update_write_sk
memcpy(ttl_bytes, data, ROCKSDB_SIZEOF_TTL_RECORD);
}
}
} else {
/* All NULL bits are initially 0 */
m_storage_record.fill(m_null_bytes_length_in_record, 0);
}
// If a primary key may have non-empty unpack_info for certain values,
// (m_maybe_unpack_info=TRUE), we write the unpack_info block. The block
// itself was prepared in Rdb_key_def::pack_record.
if (m_maybe_unpack_info) {
m_storage_record.append(reinterpret_cast<char *>(pk_unpack_info->ptr()),
pk_unpack_info->get_current_pos());
}
for (uint i = 0; i < m_table->s->fields; i++) {
Rdb_field_encoder &encoder = m_encoder_arr[i];
/* Don't pack decodable PK key parts */
if (encoder.m_storage_type != Rdb_field_encoder::STORE_ALL) {
continue;
}
Field *const field = m_table->field[i];
if (encoder.maybe_null()) {
char *data = const_cast<char *>(m_storage_record.ptr());
if (has_ttl) {
data += ROCKSDB_SIZEOF_TTL_RECORD;
}
if (field->is_null()) {
data[encoder.m_null_offset] |= encoder.m_null_mask;
/* Don't write anything for NULL values */
continue;
}
}
if (encoder.m_field_type == MYSQL_TYPE_BLOB) {
my_core::Field_blob *blob =
reinterpret_cast<my_core::Field_blob *>(field);
/* Get the number of bytes needed to store length*/
const uint length_bytes = blob->pack_length() - portable_sizeof_char_ptr;
/* Store the length of the value */
m_storage_record.append(reinterpret_cast<char *>(blob->ptr),
length_bytes);
/* Store the blob value itself */
char *data_ptr;
memcpy(&data_ptr, blob->ptr + length_bytes, sizeof(uchar **));
m_storage_record.append(data_ptr, blob->get_length());
} else if (encoder.m_field_type == MYSQL_TYPE_VARCHAR) {
Field_varstring *const field_var =
reinterpret_cast<Field_varstring *>(field);
uint data_len;
/* field_var->length_bytes is 1 or 2 */
if (field_var->length_bytes == 1) {
data_len = field_var->ptr[0];
} else {
DBUG_ASSERT(field_var->length_bytes == 2);
data_len = uint2korr(field_var->ptr);
}
m_storage_record.append(reinterpret_cast<char *>(field_var->ptr),
field_var->length_bytes + data_len);
} else {
/* Copy the field data */
const uint len = field->pack_length_in_rec();
m_storage_record.append(reinterpret_cast<char *>(field->ptr), len);
}
}
if (store_row_debug_checksums) {
const uint32_t key_crc32 = my_core::my_checksum(
0, rdb_slice_to_uchar_ptr(&pk_packed_slice), pk_packed_slice.size());
const uint32_t val_crc32 =
my_core::my_checksum(0, rdb_mysql_str_to_uchar_str(&m_storage_record),
m_storage_record.length());
uchar key_crc_buf[RDB_CHECKSUM_SIZE];
uchar val_crc_buf[RDB_CHECKSUM_SIZE];
rdb_netbuf_store_uint32(key_crc_buf, key_crc32);
rdb_netbuf_store_uint32(val_crc_buf, val_crc32);
m_storage_record.append((const char *)&RDB_CHECKSUM_DATA_TAG, 1);
m_storage_record.append((const char *)key_crc_buf, RDB_CHECKSUM_SIZE);
m_storage_record.append((const char *)val_crc_buf, RDB_CHECKSUM_SIZE);
}
*value_slice =
rocksdb::Slice(m_storage_record.ptr(), m_storage_record.length());
return HA_EXIT_SUCCESS;
}
} // namespace myrocks
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