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mariadb/storage/innobase/rem/rem0rec.cc
Sergei Golubchik 4771ae4b22 Merge branch 'github/10.1' into 10.2
2018-02-06 14:50:50 +01:00

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/*****************************************************************************
Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2017, 2018, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
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, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/********************************************************************//**
@file rem/rem0rec.cc
Record manager
Created 5/30/1994 Heikki Tuuri
*************************************************************************/
#include "rem0rec.h"
#include "page0page.h"
#include "mtr0mtr.h"
#include "mtr0log.h"
#include "fts0fts.h"
#ifdef WITH_WSREP
#include <ha_prototypes.h>
#endif /* WITH_WSREP */
#include "gis0geo.h"
#include "trx0sys.h"
#include "mach0data.h"
/* PHYSICAL RECORD (OLD STYLE)
===========================
The physical record, which is the data type of all the records
found in index pages of the database, has the following format
(lower addresses and more significant bits inside a byte are below
represented on a higher text line):
| offset of the end of the last field of data, the most significant
bit is set to 1 if and only if the field is SQL-null,
if the offset is 2-byte, then the second most significant
bit is set to 1 if the field is stored on another page:
mostly this will occur in the case of big BLOB fields |
...
| offset of the end of the first field of data + the SQL-null bit |
| 4 bits used to delete mark a record, and mark a predefined
minimum record in alphabetical order |
| 4 bits giving the number of records owned by this record
(this term is explained in page0page.h) |
| 13 bits giving the order number of this record in the
heap of the index page |
| 10 bits giving the number of fields in this record |
| 1 bit which is set to 1 if the offsets above are given in
one byte format, 0 if in two byte format |
| two bytes giving an absolute pointer to the next record in the page |
ORIGIN of the record
| first field of data |
...
| last field of data |
The origin of the record is the start address of the first field
of data. The offsets are given relative to the origin.
The offsets of the data fields are stored in an inverted
order because then the offset of the first fields are near the
origin, giving maybe a better processor cache hit rate in searches.
The offsets of the data fields are given as one-byte
(if there are less than 127 bytes of data in the record)
or two-byte unsigned integers. The most significant bit
is not part of the offset, instead it indicates the SQL-null
if the bit is set to 1. */
/* PHYSICAL RECORD (NEW STYLE)
===========================
The physical record, which is the data type of all the records
found in index pages of the database, has the following format
(lower addresses and more significant bits inside a byte are below
represented on a higher text line):
| length of the last non-null variable-length field of data:
if the maximum length is 255, one byte; otherwise,
0xxxxxxx (one byte, length=0..127), or 1exxxxxxxxxxxxxx (two bytes,
length=128..16383, extern storage flag) |
...
| length of first variable-length field of data |
| SQL-null flags (1 bit per nullable field), padded to full bytes |
| 4 bits used to delete mark a record, and mark a predefined
minimum record in alphabetical order |
| 4 bits giving the number of records owned by this record
(this term is explained in page0page.h) |
| 13 bits giving the order number of this record in the
heap of the index page |
| 3 bits record type: 000=conventional, 001=node pointer (inside B-tree),
010=infimum, 011=supremum, 1xx=reserved |
| two bytes giving a relative pointer to the next record in the page |
ORIGIN of the record
| first field of data |
...
| last field of data |
The origin of the record is the start address of the first field
of data. The offsets are given relative to the origin.
The offsets of the data fields are stored in an inverted
order because then the offset of the first fields are near the
origin, giving maybe a better processor cache hit rate in searches.
The offsets of the data fields are given as one-byte
(if there are less than 127 bytes of data in the record)
or two-byte unsigned integers. The most significant bit
is not part of the offset, instead it indicates the SQL-null
if the bit is set to 1. */
/* CANONICAL COORDINATES. A record can be seen as a single
string of 'characters' in the following way: catenate the bytes
in each field, in the order of fields. An SQL-null field
is taken to be an empty sequence of bytes. Then after
the position of each field insert in the string
the 'character' <FIELD-END>, except that after an SQL-null field
insert <NULL-FIELD-END>. Now the ordinal position of each
byte in this canonical string is its canonical coordinate.
So, for the record ("AA", SQL-NULL, "BB", ""), the canonical
string is "AA<FIELD_END><NULL-FIELD-END>BB<FIELD-END><FIELD-END>".
We identify prefixes (= initial segments) of a record
with prefixes of the canonical string. The canonical
length of the prefix is the length of the corresponding
prefix of the canonical string. The canonical length of
a record is the length of its canonical string.
For example, the maximal common prefix of records
("AA", SQL-NULL, "BB", "C") and ("AA", SQL-NULL, "B", "C")
is "AA<FIELD-END><NULL-FIELD-END>B", and its canonical
length is 5.
A complete-field prefix of a record is a prefix which ends at the
end of some field (containing also <FIELD-END>).
A record is a complete-field prefix of another record, if
the corresponding canonical strings have the same property. */
/***************************************************************//**
Validates the consistency of an old-style physical record.
@return TRUE if ok */
static
ibool
rec_validate_old(
/*=============*/
const rec_t* rec); /*!< in: physical record */
/******************************************************//**
Determine how many of the first n columns in a compact
physical record are stored externally.
@return number of externally stored columns */
ulint
rec_get_n_extern_new(
/*=================*/
const rec_t* rec, /*!< in: compact physical record */
const dict_index_t* index, /*!< in: record descriptor */
ulint n) /*!< in: number of columns to scan */
{
const byte* nulls;
const byte* lens;
ulint null_mask;
ulint n_extern;
ulint i;
ut_ad(dict_table_is_comp(index->table));
ut_ad(rec_get_status(rec) == REC_STATUS_ORDINARY);
ut_ad(n == ULINT_UNDEFINED || n <= dict_index_get_n_fields(index));
if (n == ULINT_UNDEFINED) {
n = dict_index_get_n_fields(index);
}
nulls = rec - (REC_N_NEW_EXTRA_BYTES + 1);
lens = nulls - UT_BITS_IN_BYTES(index->n_nullable);
null_mask = 1;
n_extern = 0;
i = 0;
/* read the lengths of fields 0..n */
do {
const dict_field_t* field
= dict_index_get_nth_field(index, i);
const dict_col_t* col
= dict_field_get_col(field);
ulint len;
if (!(col->prtype & DATA_NOT_NULL)) {
/* nullable field => read the null flag */
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls--;
null_mask = 1;
}
if (*nulls & null_mask) {
null_mask <<= 1;
/* No length is stored for NULL fields. */
continue;
}
null_mask <<= 1;
}
if (UNIV_UNLIKELY(!field->fixed_len)) {
/* Variable-length field: read the length */
len = *lens--;
/* If the maximum length of the field is up
to 255 bytes, the actual length is always
stored in one byte. If the maximum length is
more than 255 bytes, the actual length is
stored in one byte for 0..127. The length
will be encoded in two bytes when it is 128 or
more, or when the field is stored externally. */
if (DATA_BIG_COL(col)) {
if (len & 0x80) {
/* 1exxxxxxx xxxxxxxx */
if (len & 0x40) {
n_extern++;
}
lens--;
}
}
}
} while (++i < n);
return(n_extern);
}
/******************************************************//**
Determine the offset to each field in a leaf-page record
in ROW_FORMAT=COMPACT. This is a special case of
rec_init_offsets() and rec_get_offsets_func(). */
UNIV_INLINE MY_ATTRIBUTE((nonnull))
void
rec_init_offsets_comp_ordinary(
/*===========================*/
const rec_t* rec, /*!< in: physical record in
ROW_FORMAT=COMPACT */
bool temp, /*!< in: whether to use the
format for temporary files in
index creation */
const dict_index_t* index, /*!< in: record descriptor */
ulint* offsets)/*!< in/out: array of offsets;
in: n=rec_offs_n_fields(offsets) */
{
ulint i = 0;
ulint offs = 0;
ulint any_ext = 0;
ulint n_null = index->n_nullable;
const byte* nulls = temp
? rec - 1
: rec - (1 + REC_N_NEW_EXTRA_BYTES);
const byte* lens = nulls - UT_BITS_IN_BYTES(n_null);
ulint null_mask = 1;
#ifdef UNIV_DEBUG
/* We cannot invoke rec_offs_make_valid() here if temp=true.
Similarly, rec_offs_validate() will fail in that case, because
it invokes rec_get_status(). */
offsets[2] = (ulint) rec;
offsets[3] = (ulint) index;
#endif /* UNIV_DEBUG */
ut_ad(temp || dict_table_is_comp(index->table));
if (temp && dict_table_is_comp(index->table)) {
/* No need to do adjust fixed_len=0. We only need to
adjust it for ROW_FORMAT=REDUNDANT. */
temp = false;
}
/* read the lengths of fields 0..n */
do {
const dict_field_t* field
= dict_index_get_nth_field(index, i);
const dict_col_t* col
= dict_field_get_col(field);
ulint len;
if (!(col->prtype & DATA_NOT_NULL)) {
/* nullable field => read the null flag */
ut_ad(n_null--);
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls--;
null_mask = 1;
}
if (*nulls & null_mask) {
null_mask <<= 1;
/* No length is stored for NULL fields.
We do not advance offs, and we set
the length to zero and enable the
SQL NULL flag in offsets[]. */
len = offs | REC_OFFS_SQL_NULL;
goto resolved;
}
null_mask <<= 1;
}
if (!field->fixed_len
|| (temp && !dict_col_get_fixed_size(col, temp))) {
/* Variable-length field: read the length */
len = *lens--;
/* If the maximum length of the field is up
to 255 bytes, the actual length is always
stored in one byte. If the maximum length is
more than 255 bytes, the actual length is
stored in one byte for 0..127. The length
will be encoded in two bytes when it is 128 or
more, or when the field is stored externally. */
if (DATA_BIG_COL(col)) {
if (len & 0x80) {
/* 1exxxxxxx xxxxxxxx */
len <<= 8;
len |= *lens--;
offs += len & 0x3fff;
if (UNIV_UNLIKELY(len
& 0x4000)) {
ut_ad(dict_index_is_clust
(index));
any_ext = REC_OFFS_EXTERNAL;
len = offs
| REC_OFFS_EXTERNAL;
} else {
len = offs;
}
goto resolved;
}
}
len = offs += len;
} else {
len = offs += field->fixed_len;
}
resolved:
rec_offs_base(offsets)[i + 1] = len;
} while (++i < rec_offs_n_fields(offsets));
*rec_offs_base(offsets)
= (rec - (lens + 1)) | REC_OFFS_COMPACT | any_ext;
}
/******************************************************//**
The following function determines the offsets to each field in the
record. The offsets are written to a previously allocated array of
ulint, where rec_offs_n_fields(offsets) has been initialized to the
number of fields in the record. The rest of the array will be
initialized by this function. rec_offs_base(offsets)[0] will be set
to the extra size (if REC_OFFS_COMPACT is set, the record is in the
new format; if REC_OFFS_EXTERNAL is set, the record contains externally
stored columns), and rec_offs_base(offsets)[1..n_fields] will be set to
offsets past the end of fields 0..n_fields, or to the beginning of
fields 1..n_fields+1. When the high-order bit of the offset at [i+1]
is set (REC_OFFS_SQL_NULL), the field i is NULL. When the second
high-order bit of the offset at [i+1] is set (REC_OFFS_EXTERNAL), the
field i is being stored externally. */
static
void
rec_init_offsets(
/*=============*/
const rec_t* rec, /*!< in: physical record */
const dict_index_t* index, /*!< in: record descriptor */
ulint* offsets)/*!< in/out: array of offsets;
in: n=rec_offs_n_fields(offsets) */
{
ulint i = 0;
ulint offs;
rec_offs_make_valid(rec, index, offsets);
if (dict_table_is_comp(index->table)) {
const byte* nulls;
const byte* lens;
dict_field_t* field;
ulint null_mask;
ulint status = rec_get_status(rec);
ulint n_node_ptr_field = ULINT_UNDEFINED;
switch (UNIV_EXPECT(status, REC_STATUS_ORDINARY)) {
case REC_STATUS_INFIMUM:
case REC_STATUS_SUPREMUM:
/* the field is 8 bytes long */
rec_offs_base(offsets)[0]
= REC_N_NEW_EXTRA_BYTES | REC_OFFS_COMPACT;
rec_offs_base(offsets)[1] = 8;
return;
case REC_STATUS_NODE_PTR:
n_node_ptr_field
= dict_index_get_n_unique_in_tree_nonleaf(
index);
break;
case REC_STATUS_ORDINARY:
rec_init_offsets_comp_ordinary(
rec, false, index, offsets);
return;
}
nulls = rec - (REC_N_NEW_EXTRA_BYTES + 1);
lens = nulls - UT_BITS_IN_BYTES(index->n_nullable);
offs = 0;
null_mask = 1;
/* read the lengths of fields 0..n */
do {
ulint len;
if (UNIV_UNLIKELY(i == n_node_ptr_field)) {
len = offs += REC_NODE_PTR_SIZE;
goto resolved;
}
field = dict_index_get_nth_field(index, i);
if (!(dict_field_get_col(field)->prtype
& DATA_NOT_NULL)) {
/* nullable field => read the null flag */
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls--;
null_mask = 1;
}
if (*nulls & null_mask) {
null_mask <<= 1;
/* No length is stored for NULL fields.
We do not advance offs, and we set
the length to zero and enable the
SQL NULL flag in offsets[]. */
len = offs | REC_OFFS_SQL_NULL;
goto resolved;
}
null_mask <<= 1;
}
if (UNIV_UNLIKELY(!field->fixed_len)) {
const dict_col_t* col
= dict_field_get_col(field);
/* Variable-length field: read the length */
len = *lens--;
/* If the maximum length of the field
is up to 255 bytes, the actual length
is always stored in one byte. If the
maximum length is more than 255 bytes,
the actual length is stored in one
byte for 0..127. The length will be
encoded in two bytes when it is 128 or
more, or when the field is stored
externally. */
if (DATA_BIG_COL(col)) {
if (len & 0x80) {
/* 1exxxxxxx xxxxxxxx */
len <<= 8;
len |= *lens--;
/* B-tree node pointers
must not contain externally
stored columns. Thus
the "e" flag must be 0. */
ut_a(!(len & 0x4000));
offs += len & 0x3fff;
len = offs;
goto resolved;
}
}
len = offs += len;
} else {
len = offs += field->fixed_len;
}
resolved:
rec_offs_base(offsets)[i + 1] = len;
} while (++i < rec_offs_n_fields(offsets));
*rec_offs_base(offsets)
= (rec - (lens + 1)) | REC_OFFS_COMPACT;
} else {
/* Old-style record: determine extra size and end offsets */
offs = REC_N_OLD_EXTRA_BYTES;
if (rec_get_1byte_offs_flag(rec)) {
offs += rec_offs_n_fields(offsets);
*rec_offs_base(offsets) = offs;
/* Determine offsets to fields */
do {
offs = rec_1_get_field_end_info(rec, i);
if (offs & REC_1BYTE_SQL_NULL_MASK) {
offs &= ~REC_1BYTE_SQL_NULL_MASK;
offs |= REC_OFFS_SQL_NULL;
}
rec_offs_base(offsets)[1 + i] = offs;
} while (++i < rec_offs_n_fields(offsets));
} else {
offs += 2 * rec_offs_n_fields(offsets);
*rec_offs_base(offsets) = offs;
/* Determine offsets to fields */
do {
offs = rec_2_get_field_end_info(rec, i);
if (offs & REC_2BYTE_SQL_NULL_MASK) {
offs &= ~REC_2BYTE_SQL_NULL_MASK;
offs |= REC_OFFS_SQL_NULL;
}
if (offs & REC_2BYTE_EXTERN_MASK) {
offs &= ~REC_2BYTE_EXTERN_MASK;
offs |= REC_OFFS_EXTERNAL;
*rec_offs_base(offsets) |= REC_OFFS_EXTERNAL;
}
rec_offs_base(offsets)[1 + i] = offs;
} while (++i < rec_offs_n_fields(offsets));
}
}
}
/** Determine the offsets to each field in an index record.
@param[in] rec physical record
@param[in] index the index that the record belongs to
@param[in,out] offsets array comprising offsets[0] allocated elements,
or an array from rec_get_offsets(), or NULL
@param[in] leaf whether this is a leaf-page record
@param[in] n_fields maximum number of offsets to compute
(ULINT_UNDEFINED to compute all offsets)
@param[in,out] heap memory heap
@return the new offsets */
ulint*
rec_get_offsets_func(
const rec_t* rec,
const dict_index_t* index,
ulint* offsets,
#ifdef UNIV_DEBUG
bool leaf,
#endif /* UNIV_DEBUG */
ulint n_fields,
#ifdef UNIV_DEBUG
const char* file, /*!< in: file name where called */
unsigned line, /*!< in: line number where called */
#endif /* UNIV_DEBUG */
mem_heap_t** heap) /*!< in/out: memory heap */
{
ulint n;
ulint size;
ut_ad(rec);
ut_ad(index);
ut_ad(heap);
if (dict_table_is_comp(index->table)) {
switch (UNIV_EXPECT(rec_get_status(rec),
REC_STATUS_ORDINARY)) {
case REC_STATUS_ORDINARY:
ut_ad(leaf);
n = dict_index_get_n_fields(index);
break;
case REC_STATUS_NODE_PTR:
/* Node pointer records consist of the
uniquely identifying fields of the record
followed by a child page number field. */
ut_ad(!leaf);
n = dict_index_get_n_unique_in_tree_nonleaf(index) + 1;
break;
case REC_STATUS_INFIMUM:
case REC_STATUS_SUPREMUM:
/* infimum or supremum record */
ut_ad(rec_get_heap_no_new(rec)
== ulint(rec_get_status(rec)
== REC_STATUS_INFIMUM
? PAGE_HEAP_NO_INFIMUM
: PAGE_HEAP_NO_SUPREMUM));
n = 1;
break;
default:
ut_error;
return(NULL);
}
} else {
n = rec_get_n_fields_old(rec);
/* Here, rec can be allocated from the heap (copied
from an index page record), or it can be located in an
index page. If rec is not in an index page, then
page_rec_is_user_rec(rec) and similar predicates
cannot be evaluated. We can still distinguish the
infimum and supremum record based on the heap number. */
ut_d(const bool is_user_rec = rec_get_heap_no_old(rec)
>= PAGE_HEAP_NO_USER_LOW);
/* The infimum and supremum records carry 1 field. */
ut_ad(is_user_rec || n == 1);
ut_ad(!is_user_rec || leaf || index->is_dummy
|| dict_index_is_ibuf(index)
|| n == n_fields /* dict_stats_analyze_index_level() */
|| n
== dict_index_get_n_unique_in_tree_nonleaf(index) + 1);
ut_ad(!is_user_rec || !leaf || index->is_dummy
|| dict_index_is_ibuf(index)
|| n == n_fields /* btr_pcur_restore_position() */
|| n == index->n_fields
|| (index->id == DICT_INDEXES_ID
&& (n == DICT_NUM_FIELDS__SYS_INDEXES - 1)));
}
if (UNIV_UNLIKELY(n_fields < n)) {
n = n_fields;
}
/* The offsets header consists of the allocation size at
offsets[0] and the REC_OFFS_HEADER_SIZE bytes. */
size = n + (1 + REC_OFFS_HEADER_SIZE);
if (UNIV_UNLIKELY(!offsets)
|| UNIV_UNLIKELY(rec_offs_get_n_alloc(offsets) < size)) {
if (UNIV_UNLIKELY(!*heap)) {
*heap = mem_heap_create_at(size * sizeof(ulint),
file, line);
}
offsets = static_cast<ulint*>(
mem_heap_alloc(*heap, size * sizeof(ulint)));
rec_offs_set_n_alloc(offsets, size);
}
rec_offs_set_n_fields(offsets, n);
rec_init_offsets(rec, index, offsets);
return(offsets);
}
/******************************************************//**
The following function determines the offsets to each field
in the record. It can reuse a previously allocated array. */
void
rec_get_offsets_reverse(
/*====================*/
const byte* extra, /*!< in: the extra bytes of a
compact record in reverse order,
excluding the fixed-size
REC_N_NEW_EXTRA_BYTES */
const dict_index_t* index, /*!< in: record descriptor */
ulint node_ptr,/*!< in: nonzero=node pointer,
0=leaf node */
ulint* offsets)/*!< in/out: array consisting of
offsets[0] allocated elements */
{
ulint n;
ulint i;
ulint offs;
ulint any_ext;
const byte* nulls;
const byte* lens;
dict_field_t* field;
ulint null_mask;
ulint n_node_ptr_field;
ut_ad(extra);
ut_ad(index);
ut_ad(offsets);
ut_ad(dict_table_is_comp(index->table));
if (UNIV_UNLIKELY(node_ptr)) {
n_node_ptr_field =
dict_index_get_n_unique_in_tree_nonleaf(index);
n = n_node_ptr_field + 1;
} else {
n_node_ptr_field = ULINT_UNDEFINED;
n = dict_index_get_n_fields(index);
}
ut_a(rec_offs_get_n_alloc(offsets) >= n + (1 + REC_OFFS_HEADER_SIZE));
rec_offs_set_n_fields(offsets, n);
nulls = extra;
lens = nulls + UT_BITS_IN_BYTES(index->n_nullable);
i = offs = 0;
null_mask = 1;
any_ext = 0;
/* read the lengths of fields 0..n */
do {
ulint len;
if (UNIV_UNLIKELY(i == n_node_ptr_field)) {
len = offs += REC_NODE_PTR_SIZE;
goto resolved;
}
field = dict_index_get_nth_field(index, i);
if (!(dict_field_get_col(field)->prtype & DATA_NOT_NULL)) {
/* nullable field => read the null flag */
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls++;
null_mask = 1;
}
if (*nulls & null_mask) {
null_mask <<= 1;
/* No length is stored for NULL fields.
We do not advance offs, and we set
the length to zero and enable the
SQL NULL flag in offsets[]. */
len = offs | REC_OFFS_SQL_NULL;
goto resolved;
}
null_mask <<= 1;
}
if (UNIV_UNLIKELY(!field->fixed_len)) {
/* Variable-length field: read the length */
const dict_col_t* col
= dict_field_get_col(field);
len = *lens++;
/* If the maximum length of the field is up
to 255 bytes, the actual length is always
stored in one byte. If the maximum length is
more than 255 bytes, the actual length is
stored in one byte for 0..127. The length
will be encoded in two bytes when it is 128 or
more, or when the field is stored externally. */
if (DATA_BIG_COL(col)) {
if (len & 0x80) {
/* 1exxxxxxx xxxxxxxx */
len <<= 8;
len |= *lens++;
offs += len & 0x3fff;
if (UNIV_UNLIKELY(len & 0x4000)) {
any_ext = REC_OFFS_EXTERNAL;
len = offs | REC_OFFS_EXTERNAL;
} else {
len = offs;
}
goto resolved;
}
}
len = offs += len;
} else {
len = offs += field->fixed_len;
}
resolved:
rec_offs_base(offsets)[i + 1] = len;
} while (++i < rec_offs_n_fields(offsets));
ut_ad(lens >= extra);
*rec_offs_base(offsets) = (lens - extra + REC_N_NEW_EXTRA_BYTES)
| REC_OFFS_COMPACT | any_ext;
}
/************************************************************//**
The following function is used to get the offset to the nth
data field in an old-style record.
@return offset to the field */
ulint
rec_get_nth_field_offs_old(
/*=======================*/
const rec_t* rec, /*!< in: record */
ulint n, /*!< in: index of the field */
ulint* len) /*!< out: length of the field;
UNIV_SQL_NULL if SQL null */
{
ulint os;
ulint next_os;
ut_ad(len);
ut_a(rec);
ut_a(n < rec_get_n_fields_old(rec));
if (rec_get_1byte_offs_flag(rec)) {
os = rec_1_get_field_start_offs(rec, n);
next_os = rec_1_get_field_end_info(rec, n);
if (next_os & REC_1BYTE_SQL_NULL_MASK) {
*len = UNIV_SQL_NULL;
return(os);
}
next_os = next_os & ~REC_1BYTE_SQL_NULL_MASK;
} else {
os = rec_2_get_field_start_offs(rec, n);
next_os = rec_2_get_field_end_info(rec, n);
if (next_os & REC_2BYTE_SQL_NULL_MASK) {
*len = UNIV_SQL_NULL;
return(os);
}
next_os = next_os & ~(REC_2BYTE_SQL_NULL_MASK
| REC_2BYTE_EXTERN_MASK);
}
*len = next_os - os;
ut_ad(*len < UNIV_PAGE_SIZE);
return(os);
}
/**********************************************************//**
Determines the size of a data tuple prefix in ROW_FORMAT=COMPACT.
@return total size */
UNIV_INLINE MY_ATTRIBUTE((warn_unused_result, nonnull(1,2)))
ulint
rec_get_converted_size_comp_prefix_low(
/*===================================*/
const dict_index_t* index, /*!< in: record descriptor;
dict_table_is_comp() is
assumed to hold, even if
it does not */
const dfield_t* fields, /*!< in: array of data fields */
ulint n_fields,/*!< in: number of data fields */
ulint* extra, /*!< out: extra size */
bool temp) /*!< in: whether this is a
temporary file record */
{
ulint extra_size;
ulint data_size;
ulint i;
ut_ad(n_fields > 0);
ut_ad(n_fields <= dict_index_get_n_fields(index));
ut_ad(!temp || extra);
ut_d(ulint n_null = index->n_nullable);
extra_size = temp
? UT_BITS_IN_BYTES(index->n_nullable)
: REC_N_NEW_EXTRA_BYTES + UT_BITS_IN_BYTES(index->n_nullable);
data_size = 0;
if (temp && dict_table_is_comp(index->table)) {
/* No need to do adjust fixed_len=0. We only need to
adjust it for ROW_FORMAT=REDUNDANT. */
temp = false;
}
/* read the lengths of fields 0..n */
for (i = 0; i < n_fields; i++) {
const dict_field_t* field;
ulint len;
ulint fixed_len;
const dict_col_t* col;
field = dict_index_get_nth_field(index, i);
len = dfield_get_len(&fields[i]);
col = dict_field_get_col(field);
#ifdef UNIV_DEBUG
dtype_t* type;
type = dfield_get_type(&fields[i]);
if (dict_index_is_spatial(index)) {
if (DATA_GEOMETRY_MTYPE(col->mtype) && i == 0) {
ut_ad(type->prtype & DATA_GIS_MBR);
} else {
ut_ad(type->mtype == DATA_SYS_CHILD
|| dict_col_type_assert_equal(col, type));
}
} else {
ut_ad(dict_col_type_assert_equal(col, type));
}
#endif
/* All NULLable fields must be included in the n_null count. */
ut_ad((col->prtype & DATA_NOT_NULL) || n_null--);
if (dfield_is_null(&fields[i])) {
/* No length is stored for NULL fields. */
ut_ad(!(col->prtype & DATA_NOT_NULL));
continue;
}
ut_ad(len <= col->len || DATA_LARGE_MTYPE(col->mtype)
|| (col->len == 0 && col->mtype == DATA_VARCHAR));
fixed_len = field->fixed_len;
if (temp && fixed_len
&& !dict_col_get_fixed_size(col, temp)) {
fixed_len = 0;
}
/* If the maximum length of a variable-length field
is up to 255 bytes, the actual length is always stored
in one byte. If the maximum length is more than 255
bytes, the actual length is stored in one byte for
0..127. The length will be encoded in two bytes when
it is 128 or more, or when the field is stored externally. */
if (fixed_len) {
#ifdef UNIV_DEBUG
ut_ad(len <= fixed_len);
if (dict_index_is_spatial(index)) {
ut_ad(type->mtype == DATA_SYS_CHILD
|| !col->mbmaxlen
|| len >= col->mbminlen
* fixed_len / col->mbmaxlen);
} else {
ut_ad(type->mtype != DATA_SYS_CHILD);
ut_ad(!col->mbmaxlen
|| len >= col->mbminlen
* fixed_len / col->mbmaxlen);
}
/* dict_index_add_col() should guarantee this */
ut_ad(!field->prefix_len
|| fixed_len == field->prefix_len);
#endif /* UNIV_DEBUG */
} else if (dfield_is_ext(&fields[i])) {
ut_ad(DATA_BIG_COL(col));
extra_size += 2;
} else if (len < 128 || !DATA_BIG_COL(col)) {
extra_size++;
} else {
/* For variable-length columns, we look up the
maximum length from the column itself. If this
is a prefix index column shorter than 256 bytes,
this will waste one byte. */
extra_size += 2;
}
data_size += len;
}
if (extra) {
*extra = extra_size;
}
return(extra_size + data_size);
}
/**********************************************************//**
Determines the size of a data tuple prefix in ROW_FORMAT=COMPACT.
@return total size */
ulint
rec_get_converted_size_comp_prefix(
/*===============================*/
const dict_index_t* index, /*!< in: record descriptor */
const dfield_t* fields, /*!< in: array of data fields */
ulint n_fields,/*!< in: number of data fields */
ulint* extra) /*!< out: extra size */
{
ut_ad(dict_table_is_comp(index->table));
return(rec_get_converted_size_comp_prefix_low(
index, fields, n_fields, extra, false));
}
/**********************************************************//**
Determines the size of a data tuple in ROW_FORMAT=COMPACT.
@return total size */
ulint
rec_get_converted_size_comp(
/*========================*/
const dict_index_t* index, /*!< in: record descriptor;
dict_table_is_comp() is
assumed to hold, even if
it does not */
ulint status, /*!< in: status bits of the record */
const dfield_t* fields, /*!< in: array of data fields */
ulint n_fields,/*!< in: number of data fields */
ulint* extra) /*!< out: extra size */
{
ulint size;
ut_ad(n_fields > 0);
switch (UNIV_EXPECT(status, REC_STATUS_ORDINARY)) {
case REC_STATUS_ORDINARY:
ut_ad(n_fields == dict_index_get_n_fields(index));
size = 0;
break;
case REC_STATUS_NODE_PTR:
n_fields--;
ut_ad(n_fields == dict_index_get_n_unique_in_tree_nonleaf(
index));
ut_ad(dfield_get_len(&fields[n_fields]) == REC_NODE_PTR_SIZE);
size = REC_NODE_PTR_SIZE; /* child page number */
break;
case REC_STATUS_INFIMUM:
case REC_STATUS_SUPREMUM:
/* infimum or supremum record, 8 data bytes */
if (UNIV_LIKELY_NULL(extra)) {
*extra = REC_N_NEW_EXTRA_BYTES;
}
return(REC_N_NEW_EXTRA_BYTES + 8);
default:
ut_error;
return(ULINT_UNDEFINED);
}
return(size + rec_get_converted_size_comp_prefix_low(
index, fields, n_fields, extra, false));
}
/***********************************************************//**
Sets the value of the ith field SQL null bit of an old-style record. */
void
rec_set_nth_field_null_bit(
/*=======================*/
rec_t* rec, /*!< in: record */
ulint i, /*!< in: ith field */
ibool val) /*!< in: value to set */
{
ulint info;
if (rec_get_1byte_offs_flag(rec)) {
info = rec_1_get_field_end_info(rec, i);
if (val) {
info = info | REC_1BYTE_SQL_NULL_MASK;
} else {
info = info & ~REC_1BYTE_SQL_NULL_MASK;
}
rec_1_set_field_end_info(rec, i, info);
return;
}
info = rec_2_get_field_end_info(rec, i);
if (val) {
info = info | REC_2BYTE_SQL_NULL_MASK;
} else {
info = info & ~REC_2BYTE_SQL_NULL_MASK;
}
rec_2_set_field_end_info(rec, i, info);
}
/***********************************************************//**
Sets an old-style record field to SQL null.
The physical size of the field is not changed. */
void
rec_set_nth_field_sql_null(
/*=======================*/
rec_t* rec, /*!< in: record */
ulint n) /*!< in: index of the field */
{
ulint offset;
offset = rec_get_field_start_offs(rec, n);
data_write_sql_null(rec + offset, rec_get_nth_field_size(rec, n));
rec_set_nth_field_null_bit(rec, n, TRUE);
}
/*********************************************************//**
Builds an old-style physical record out of a data tuple and
stores it beginning from the start of the given buffer.
@return pointer to the origin of physical record */
static
rec_t*
rec_convert_dtuple_to_rec_old(
/*==========================*/
byte* buf, /*!< in: start address of the physical record */
const dtuple_t* dtuple, /*!< in: data tuple */
ulint n_ext) /*!< in: number of externally stored columns */
{
const dfield_t* field;
ulint n_fields;
ulint data_size;
rec_t* rec;
ulint end_offset;
ulint ored_offset;
ulint len;
ulint i;
ut_ad(buf && dtuple);
ut_ad(dtuple_validate(dtuple));
ut_ad(dtuple_check_typed(dtuple));
n_fields = dtuple_get_n_fields(dtuple);
data_size = dtuple_get_data_size(dtuple, 0);
ut_ad(n_fields > 0);
/* Calculate the offset of the origin in the physical record */
rec = buf + rec_get_converted_extra_size(data_size, n_fields, n_ext);
/* Store the number of fields */
rec_set_n_fields_old(rec, n_fields);
/* Set the info bits of the record */
rec_set_info_bits_old(rec, dtuple_get_info_bits(dtuple)
& REC_INFO_BITS_MASK);
/* Make rec_get_offsets() and rec_offs_make_valid() happy. */
ut_d(rec_set_heap_no_old(rec, PAGE_HEAP_NO_USER_LOW));
/* Store the data and the offsets */
end_offset = 0;
if (!n_ext && data_size <= REC_1BYTE_OFFS_LIMIT) {
rec_set_1byte_offs_flag(rec, TRUE);
for (i = 0; i < n_fields; i++) {
field = dtuple_get_nth_field(dtuple, i);
if (dfield_is_null(field)) {
len = dtype_get_sql_null_size(
dfield_get_type(field), 0);
data_write_sql_null(rec + end_offset, len);
end_offset += len;
ored_offset = end_offset
| REC_1BYTE_SQL_NULL_MASK;
} else {
/* If the data is not SQL null, store it */
len = dfield_get_len(field);
memcpy(rec + end_offset,
dfield_get_data(field), len);
end_offset += len;
ored_offset = end_offset;
}
rec_1_set_field_end_info(rec, i, ored_offset);
}
} else {
rec_set_1byte_offs_flag(rec, FALSE);
for (i = 0; i < n_fields; i++) {
field = dtuple_get_nth_field(dtuple, i);
if (dfield_is_null(field)) {
len = dtype_get_sql_null_size(
dfield_get_type(field), 0);
data_write_sql_null(rec + end_offset, len);
end_offset += len;
ored_offset = end_offset
| REC_2BYTE_SQL_NULL_MASK;
} else {
/* If the data is not SQL null, store it */
len = dfield_get_len(field);
memcpy(rec + end_offset,
dfield_get_data(field), len);
end_offset += len;
ored_offset = end_offset;
if (dfield_is_ext(field)) {
ored_offset |= REC_2BYTE_EXTERN_MASK;
}
}
rec_2_set_field_end_info(rec, i, ored_offset);
}
}
return(rec);
}
/*********************************************************//**
Builds a ROW_FORMAT=COMPACT record out of a data tuple. */
UNIV_INLINE
void
rec_convert_dtuple_to_rec_comp(
/*===========================*/
rec_t* rec, /*!< in: origin of record */
const dict_index_t* index, /*!< in: record descriptor */
const dfield_t* fields, /*!< in: array of data fields */
ulint n_fields,/*!< in: number of data fields */
ulint status, /*!< in: status bits of the record */
bool temp) /*!< in: whether to use the
format for temporary files in
index creation */
{
const dfield_t* field;
const dtype_t* type;
byte* end;
byte* nulls;
byte* lens;
ulint len;
ulint i;
ulint n_node_ptr_field;
ulint fixed_len;
ulint null_mask = 1;
ut_ad(n_fields > 0);
ut_ad(temp || dict_table_is_comp(index->table));
ulint n_null = index->n_nullable;
const ulint n_null_bytes = UT_BITS_IN_BYTES(n_null);
if (temp) {
ut_ad(status == REC_STATUS_ORDINARY);
ut_ad(n_fields <= dict_index_get_n_fields(index));
n_node_ptr_field = ULINT_UNDEFINED;
nulls = rec - 1;
if (dict_table_is_comp(index->table)) {
/* No need to do adjust fixed_len=0. We only
need to adjust it for ROW_FORMAT=REDUNDANT. */
temp = false;
}
} else {
/* Make rec_get_offsets() and rec_offs_make_valid() happy. */
ut_d(rec_set_heap_no_new(rec, PAGE_HEAP_NO_USER_LOW));
nulls = rec - (REC_N_NEW_EXTRA_BYTES + 1);
switch (UNIV_EXPECT(status, REC_STATUS_ORDINARY)) {
case REC_STATUS_ORDINARY:
ut_ad(n_fields <= dict_index_get_n_fields(index));
n_node_ptr_field = ULINT_UNDEFINED;
break;
case REC_STATUS_NODE_PTR:
ut_ad(n_fields
== dict_index_get_n_unique_in_tree_nonleaf(index)
+ 1);
n_node_ptr_field = n_fields - 1;
break;
case REC_STATUS_INFIMUM:
case REC_STATUS_SUPREMUM:
ut_ad(n_fields == 1);
n_node_ptr_field = ULINT_UNDEFINED;
break;
default:
ut_error;
return;
}
}
end = rec;
/* clear the SQL-null flags */
lens = nulls - n_null_bytes;
memset(lens + 1, 0, nulls - lens);
/* Store the data and the offsets */
for (i = 0; i < n_fields; i++) {
const dict_field_t* ifield;
dict_col_t* col = NULL;
field = &fields[i];
type = dfield_get_type(field);
len = dfield_get_len(field);
if (UNIV_UNLIKELY(i == n_node_ptr_field)) {
ut_ad(dtype_get_prtype(type) & DATA_NOT_NULL);
ut_ad(len == REC_NODE_PTR_SIZE);
memcpy(end, dfield_get_data(field), len);
end += REC_NODE_PTR_SIZE;
break;
}
if (!(dtype_get_prtype(type) & DATA_NOT_NULL)) {
/* nullable field */
ut_ad(n_null--);
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls--;
null_mask = 1;
}
ut_ad(*nulls < null_mask);
/* set the null flag if necessary */
if (dfield_is_null(field)) {
*nulls |= null_mask;
null_mask <<= 1;
continue;
}
null_mask <<= 1;
}
/* only nullable fields can be null */
ut_ad(!dfield_is_null(field));
ifield = dict_index_get_nth_field(index, i);
fixed_len = ifield->fixed_len;
col = ifield->col;
if (temp && fixed_len
&& !dict_col_get_fixed_size(col, temp)) {
fixed_len = 0;
}
/* If the maximum length of a variable-length field
is up to 255 bytes, the actual length is always stored
in one byte. If the maximum length is more than 255
bytes, the actual length is stored in one byte for
0..127. The length will be encoded in two bytes when
it is 128 or more, or when the field is stored externally. */
if (fixed_len) {
ut_ad(len <= fixed_len);
ut_ad(!col->mbmaxlen
|| len >= col->mbminlen
* fixed_len / col->mbmaxlen);
ut_ad(!dfield_is_ext(field));
} else if (dfield_is_ext(field)) {
ut_ad(DATA_BIG_COL(col));
ut_ad(len <= REC_ANTELOPE_MAX_INDEX_COL_LEN
+ BTR_EXTERN_FIELD_REF_SIZE);
*lens-- = (byte) (len >> 8) | 0xc0;
*lens-- = (byte) len;
} else {
ut_ad(len <= dtype_get_len(type)
|| DATA_LARGE_MTYPE(dtype_get_mtype(type))
|| !strcmp(index->name,
FTS_INDEX_TABLE_IND_NAME));
if (len < 128 || !DATA_BIG_LEN_MTYPE(
dtype_get_len(type), dtype_get_mtype(type))) {
*lens-- = (byte) len;
} else {
ut_ad(len < 16384);
*lens-- = (byte) (len >> 8) | 0x80;
*lens-- = (byte) len;
}
}
if (len) {
memcpy(end, dfield_get_data(field), len);
end += len;
}
}
}
/*********************************************************//**
Builds a new-style physical record out of a data tuple and
stores it beginning from the start of the given buffer.
@return pointer to the origin of physical record */
static
rec_t*
rec_convert_dtuple_to_rec_new(
/*==========================*/
byte* buf, /*!< in: start address of
the physical record */
const dict_index_t* index, /*!< in: record descriptor */
const dtuple_t* dtuple) /*!< in: data tuple */
{
ulint extra_size;
ulint status;
rec_t* rec;
status = dtuple_get_info_bits(dtuple) & REC_NEW_STATUS_MASK;
rec_get_converted_size_comp(
index, status, dtuple->fields, dtuple->n_fields, &extra_size);
rec = buf + extra_size;
rec_convert_dtuple_to_rec_comp(
rec, index, dtuple->fields, dtuple->n_fields, status, false);
/* Set the info bits of the record */
rec_set_info_and_status_bits(rec, dtuple_get_info_bits(dtuple));
return(rec);
}
/*********************************************************//**
Builds a physical record out of a data tuple and
stores it beginning from the start of the given buffer.
@return pointer to the origin of physical record */
rec_t*
rec_convert_dtuple_to_rec(
/*======================*/
byte* buf, /*!< in: start address of the
physical record */
const dict_index_t* index, /*!< in: record descriptor */
const dtuple_t* dtuple, /*!< in: data tuple */
ulint n_ext) /*!< in: number of
externally stored columns */
{
rec_t* rec;
ut_ad(buf != NULL);
ut_ad(index != NULL);
ut_ad(dtuple != NULL);
ut_ad(dtuple_validate(dtuple));
ut_ad(dtuple_check_typed(dtuple));
if (dict_table_is_comp(index->table)) {
rec = rec_convert_dtuple_to_rec_new(buf, index, dtuple);
} else {
rec = rec_convert_dtuple_to_rec_old(buf, dtuple, n_ext);
}
return(rec);
}
/** Determine the size of a data tuple prefix in a temporary file.
@param[in] index clustered or secondary index
@param[in] fields data fields
@param[in] n_fields number of data fields
@param[out] extra record header size
@return total size, in bytes */
ulint
rec_get_converted_size_temp(
const dict_index_t* index,
const dfield_t* fields,
ulint n_fields,
ulint* extra)
{
return(rec_get_converted_size_comp_prefix_low(
index, fields, n_fields, extra, true));
}
/******************************************************//**
Determine the offset to each field in temporary file.
@see rec_convert_dtuple_to_temp() */
void
rec_init_offsets_temp(
/*==================*/
const rec_t* rec, /*!< in: temporary file record */
const dict_index_t* index, /*!< in: record descriptor */
ulint* offsets)/*!< in/out: array of offsets;
in: n=rec_offs_n_fields(offsets) */
{
rec_init_offsets_comp_ordinary(rec, true, index, offsets);
}
/*********************************************************//**
Builds a temporary file record out of a data tuple.
@see rec_init_offsets_temp() */
void
rec_convert_dtuple_to_temp(
/*=======================*/
rec_t* rec, /*!< out: record */
const dict_index_t* index, /*!< in: record descriptor */
const dfield_t* fields, /*!< in: array of data fields */
ulint n_fields) /*!< in: number of fields */
{
rec_convert_dtuple_to_rec_comp(rec, index, fields, n_fields,
REC_STATUS_ORDINARY, true);
}
/** Copy the first n fields of a (copy of a) physical record to a data tuple.
The fields are copied into the memory heap.
@param[out] tuple data tuple
@param[in] rec index record, or a copy thereof
@param[in] is_leaf whether rec is a leaf page record
@param[in] n_fields number of fields to copy
@param[in,out] heap memory heap */
void
rec_copy_prefix_to_dtuple_func(
dtuple_t* tuple,
const rec_t* rec,
const dict_index_t* index,
#ifdef UNIV_DEBUG
bool is_leaf,
#endif /* UNIV_DEBUG */
ulint n_fields,
mem_heap_t* heap)
{
ulint offsets_[REC_OFFS_NORMAL_SIZE];
ulint* offsets = offsets_;
rec_offs_init(offsets_);
ut_ad(is_leaf || n_fields
<= dict_index_get_n_unique_in_tree_nonleaf(index) + 1);
offsets = rec_get_offsets(rec, index, offsets, is_leaf,
n_fields, &heap);
ut_ad(rec_validate(rec, offsets));
ut_ad(dtuple_check_typed(tuple));
dtuple_set_info_bits(tuple, rec_get_info_bits(
rec, dict_table_is_comp(index->table)));
for (ulint i = 0; i < n_fields; i++) {
dfield_t* field;
const byte* data;
ulint len;
field = dtuple_get_nth_field(tuple, i);
data = rec_get_nth_field(rec, offsets, i, &len);
if (len != UNIV_SQL_NULL) {
dfield_set_data(field,
mem_heap_dup(heap, data, len), len);
ut_ad(!rec_offs_nth_extern(offsets, i));
} else {
dfield_set_null(field);
}
}
}
/**************************************************************//**
Copies the first n fields of an old-style physical record
to a new physical record in a buffer.
@return own: copied record */
static
rec_t*
rec_copy_prefix_to_buf_old(
/*=======================*/
const rec_t* rec, /*!< in: physical record */
ulint n_fields, /*!< in: number of fields to copy */
ulint area_end, /*!< in: end of the prefix data */
byte** buf, /*!< in/out: memory buffer for
the copied prefix, or NULL */
ulint* buf_size) /*!< in/out: buffer size */
{
rec_t* copy_rec;
ulint area_start;
ulint prefix_len;
if (rec_get_1byte_offs_flag(rec)) {
area_start = REC_N_OLD_EXTRA_BYTES + n_fields;
} else {
area_start = REC_N_OLD_EXTRA_BYTES + 2 * n_fields;
}
prefix_len = area_start + area_end;
if ((*buf == NULL) || (*buf_size < prefix_len)) {
ut_free(*buf);
*buf_size = prefix_len;
*buf = static_cast<byte*>(ut_malloc_nokey(prefix_len));
}
ut_memcpy(*buf, rec - area_start, prefix_len);
copy_rec = *buf + area_start;
rec_set_n_fields_old(copy_rec, n_fields);
return(copy_rec);
}
/**************************************************************//**
Copies the first n fields of a physical record to a new physical record in
a buffer.
@return own: copied record */
rec_t*
rec_copy_prefix_to_buf(
/*===================*/
const rec_t* rec, /*!< in: physical record */
const dict_index_t* index, /*!< in: record descriptor */
ulint n_fields, /*!< in: number of fields
to copy */
byte** buf, /*!< in/out: memory buffer
for the copied prefix,
or NULL */
ulint* buf_size) /*!< in/out: buffer size */
{
const byte* nulls;
const byte* lens;
ulint i;
ulint prefix_len;
ulint null_mask;
ulint status;
bool is_rtr_node_ptr = false;
UNIV_PREFETCH_RW(*buf);
if (!dict_table_is_comp(index->table)) {
ut_ad(rec_validate_old(rec));
return(rec_copy_prefix_to_buf_old(
rec, n_fields,
rec_get_field_start_offs(rec, n_fields),
buf, buf_size));
}
status = rec_get_status(rec);
switch (status) {
case REC_STATUS_ORDINARY:
ut_ad(n_fields <= dict_index_get_n_fields(index));
break;
case REC_STATUS_NODE_PTR:
/* For R-tree, we need to copy the child page number field. */
if (dict_index_is_spatial(index)) {
ut_ad(n_fields == DICT_INDEX_SPATIAL_NODEPTR_SIZE + 1);
is_rtr_node_ptr = true;
} else {
/* it doesn't make sense to copy the child page number
field */
ut_ad(n_fields <=
dict_index_get_n_unique_in_tree_nonleaf(index));
}
break;
case REC_STATUS_INFIMUM:
case REC_STATUS_SUPREMUM:
/* infimum or supremum record: no sense to copy anything */
default:
ut_error;
return(NULL);
}
nulls = rec - (REC_N_NEW_EXTRA_BYTES + 1);
lens = nulls - UT_BITS_IN_BYTES(index->n_nullable);
UNIV_PREFETCH_R(lens);
prefix_len = 0;
null_mask = 1;
/* read the lengths of fields 0..n */
for (i = 0; i < n_fields; i++) {
const dict_field_t* field;
const dict_col_t* col;
field = dict_index_get_nth_field(index, i);
col = dict_field_get_col(field);
if (!(col->prtype & DATA_NOT_NULL)) {
/* nullable field => read the null flag */
if (UNIV_UNLIKELY(!(byte) null_mask)) {
nulls--;
null_mask = 1;
}
if (*nulls & null_mask) {
null_mask <<= 1;
continue;
}
null_mask <<= 1;
}
if (is_rtr_node_ptr && i == 1) {
/* For rtree node ptr rec, we need to
copy the page no field with 4 bytes len. */
prefix_len += 4;
} else if (field->fixed_len) {
prefix_len += field->fixed_len;
} else {
ulint len = *lens--;
/* If the maximum length of the column is up
to 255 bytes, the actual length is always
stored in one byte. If the maximum length is
more than 255 bytes, the actual length is
stored in one byte for 0..127. The length
will be encoded in two bytes when it is 128 or
more, or when the column is stored externally. */
if (DATA_BIG_COL(col)) {
if (len & 0x80) {
/* 1exxxxxx */
len &= 0x3f;
len <<= 8;
len |= *lens--;
UNIV_PREFETCH_R(lens);
}
}
prefix_len += len;
}
}
UNIV_PREFETCH_R(rec + prefix_len);
prefix_len += rec - (lens + 1);
if ((*buf == NULL) || (*buf_size < prefix_len)) {
ut_free(*buf);
*buf_size = prefix_len;
*buf = static_cast<byte*>(ut_malloc_nokey(prefix_len));
}
memcpy(*buf, lens + 1, prefix_len);
return(*buf + (rec - (lens + 1)));
}
/***************************************************************//**
Validates the consistency of an old-style physical record.
@return TRUE if ok */
static
ibool
rec_validate_old(
/*=============*/
const rec_t* rec) /*!< in: physical record */
{
ulint len;
ulint n_fields;
ulint len_sum = 0;
ulint i;
ut_a(rec);
n_fields = rec_get_n_fields_old(rec);
if ((n_fields == 0) || (n_fields > REC_MAX_N_FIELDS)) {
ib::error() << "Record has " << n_fields << " fields";
return(FALSE);
}
for (i = 0; i < n_fields; i++) {
rec_get_nth_field_offs_old(rec, i, &len);
if (!((len < UNIV_PAGE_SIZE) || (len == UNIV_SQL_NULL))) {
ib::error() << "Record field " << i << " len " << len;
return(FALSE);
}
if (len != UNIV_SQL_NULL) {
len_sum += len;
} else {
len_sum += rec_get_nth_field_size(rec, i);
}
}
if (len_sum != rec_get_data_size_old(rec)) {
ib::error() << "Record len should be " << len_sum << ", len "
<< rec_get_data_size_old(rec);
return(FALSE);
}
return(TRUE);
}
/***************************************************************//**
Validates the consistency of a physical record.
@return TRUE if ok */
ibool
rec_validate(
/*=========*/
const rec_t* rec, /*!< in: physical record */
const ulint* offsets)/*!< in: array returned by rec_get_offsets() */
{
ulint len;
ulint n_fields;
ulint len_sum = 0;
ulint i;
ut_a(rec);
n_fields = rec_offs_n_fields(offsets);
if ((n_fields == 0) || (n_fields > REC_MAX_N_FIELDS)) {
ib::error() << "Record has " << n_fields << " fields";
return(FALSE);
}
ut_a(rec_offs_comp(offsets) || n_fields <= rec_get_n_fields_old(rec));
for (i = 0; i < n_fields; i++) {
rec_get_nth_field_offs(offsets, i, &len);
if (!((len < UNIV_PAGE_SIZE) || (len == UNIV_SQL_NULL))) {
ib::error() << "Record field " << i << " len " << len;
return(FALSE);
}
if (len != UNIV_SQL_NULL) {
len_sum += len;
} else if (!rec_offs_comp(offsets)) {
len_sum += rec_get_nth_field_size(rec, i);
}
}
if (len_sum != rec_offs_data_size(offsets)) {
ib::error() << "Record len should be " << len_sum << ", len "
<< rec_offs_data_size(offsets);
return(FALSE);
}
if (!rec_offs_comp(offsets)) {
ut_a(rec_validate_old(rec));
}
return(TRUE);
}
/***************************************************************//**
Prints an old-style physical record. */
void
rec_print_old(
/*==========*/
FILE* file, /*!< in: file where to print */
const rec_t* rec) /*!< in: physical record */
{
const byte* data;
ulint len;
ulint n;
ulint i;
ut_ad(rec);
n = rec_get_n_fields_old(rec);
fprintf(file, "PHYSICAL RECORD: n_fields " ULINTPF ";"
" %u-byte offsets; info bits " ULINTPF "\n",
n,
rec_get_1byte_offs_flag(rec) ? 1 : 2,
rec_get_info_bits(rec, FALSE));
for (i = 0; i < n; i++) {
data = rec_get_nth_field_old(rec, i, &len);
fprintf(file, " " ULINTPF ":", i);
if (len != UNIV_SQL_NULL) {
if (len <= 30) {
ut_print_buf(file, data, len);
} else {
ut_print_buf(file, data, 30);
fprintf(file, " (total " ULINTPF " bytes)",
len);
}
} else {
fprintf(file, " SQL NULL, size " ULINTPF " ",
rec_get_nth_field_size(rec, i));
}
putc(';', file);
putc('\n', file);
}
rec_validate_old(rec);
}
/***************************************************************//**
Prints a physical record in ROW_FORMAT=COMPACT. Ignores the
record header. */
static
void
rec_print_comp(
/*===========*/
FILE* file, /*!< in: file where to print */
const rec_t* rec, /*!< in: physical record */
const ulint* offsets)/*!< in: array returned by rec_get_offsets() */
{
ulint i;
for (i = 0; i < rec_offs_n_fields(offsets); i++) {
const byte* data;
ulint len;
data = rec_get_nth_field(rec, offsets, i, &len);
fprintf(file, " " ULINTPF ":", i);
if (len != UNIV_SQL_NULL) {
if (len <= 30) {
ut_print_buf(file, data, len);
} else if (rec_offs_nth_extern(offsets, i)) {
ut_print_buf(file, data, 30);
fprintf(file,
" (total " ULINTPF " bytes, external)",
len);
ut_print_buf(file, data + len
- BTR_EXTERN_FIELD_REF_SIZE,
BTR_EXTERN_FIELD_REF_SIZE);
} else {
ut_print_buf(file, data, 30);
fprintf(file, " (total " ULINTPF " bytes)",
len);
}
} else {
fputs(" SQL NULL", file);
}
putc(';', file);
putc('\n', file);
}
}
/***************************************************************//**
Prints an old-style spatial index record. */
static
void
rec_print_mbr_old(
/*==============*/
FILE* file, /*!< in: file where to print */
const rec_t* rec) /*!< in: physical record */
{
const byte* data;
ulint len;
ulint n;
ulint i;
ut_ad(rec);
n = rec_get_n_fields_old(rec);
fprintf(file, "PHYSICAL RECORD: n_fields %lu;"
" %u-byte offsets; info bits %lu\n",
(ulong) n,
rec_get_1byte_offs_flag(rec) ? 1 : 2,
(ulong) rec_get_info_bits(rec, FALSE));
for (i = 0; i < n; i++) {
data = rec_get_nth_field_old(rec, i, &len);
fprintf(file, " %lu:", (ulong) i);
if (len != UNIV_SQL_NULL) {
if (i == 0) {
fprintf(file, " MBR:");
for (; len > 0; len -= sizeof(double)) {
double d = mach_double_read(data);
if (len != sizeof(double)) {
fprintf(file, "%.2lf,", d);
} else {
fprintf(file, "%.2lf", d);
}
data += sizeof(double);
}
} else {
if (len <= 30) {
ut_print_buf(file, data, len);
} else {
ut_print_buf(file, data, 30);
fprintf(file, " (total %lu bytes)",
(ulong) len);
}
}
} else {
fprintf(file, " SQL NULL, size " ULINTPF " ",
rec_get_nth_field_size(rec, i));
}
putc(';', file);
putc('\n', file);
}
if (rec_get_deleted_flag(rec, false)) {
fprintf(file, " Deleted");
}
if (rec_get_info_bits(rec, true) & REC_INFO_MIN_REC_FLAG) {
fprintf(file, " First rec");
}
rec_validate_old(rec);
}
/***************************************************************//**
Prints a spatial index record. */
void
rec_print_mbr_rec(
/*==============*/
FILE* file, /*!< in: file where to print */
const rec_t* rec, /*!< in: physical record */
const ulint* offsets)/*!< in: array returned by rec_get_offsets() */
{
ut_ad(rec);
ut_ad(offsets);
ut_ad(rec_offs_validate(rec, NULL, offsets));
if (!rec_offs_comp(offsets)) {
rec_print_mbr_old(file, rec);
return;
}
for (ulint i = 0; i < rec_offs_n_fields(offsets); i++) {
const byte* data;
ulint len;
data = rec_get_nth_field(rec, offsets, i, &len);
if (i == 0) {
fprintf(file, " MBR:");
for (; len > 0; len -= sizeof(double)) {
double d = mach_double_read(data);
if (len != sizeof(double)) {
fprintf(file, "%.2lf,", d);
} else {
fprintf(file, "%.2lf", d);
}
data += sizeof(double);
}
} else {
fprintf(file, " %lu:", (ulong) i);
if (len != UNIV_SQL_NULL) {
if (len <= 30) {
ut_print_buf(file, data, len);
} else {
ut_print_buf(file, data, 30);
fprintf(file, " (total %lu bytes)",
(ulong) len);
}
} else {
fputs(" SQL NULL", file);
}
}
putc(';', file);
}
if (rec_get_info_bits(rec, true) & REC_INFO_DELETED_FLAG) {
fprintf(file, " Deleted");
}
if (rec_get_info_bits(rec, true) & REC_INFO_MIN_REC_FLAG) {
fprintf(file, " First rec");
}
rec_validate(rec, offsets);
}
/***************************************************************//**
Prints a physical record. */
void
rec_print_new(
/*==========*/
FILE* file, /*!< in: file where to print */
const rec_t* rec, /*!< in: physical record */
const ulint* offsets)/*!< in: array returned by rec_get_offsets() */
{
ut_ad(rec);
ut_ad(offsets);
ut_ad(rec_offs_validate(rec, NULL, offsets));
#ifdef UNIV_DEBUG
if (rec_get_deleted_flag(rec, rec_offs_comp(offsets))) {
DBUG_PRINT("info", ("deleted "));
} else {
DBUG_PRINT("info", ("not-deleted "));
}
#endif /* UNIV_DEBUG */
if (!rec_offs_comp(offsets)) {
rec_print_old(file, rec);
return;
}
fprintf(file, "PHYSICAL RECORD: n_fields " ULINTPF ";"
" compact format; info bits " ULINTPF "\n",
rec_offs_n_fields(offsets),
rec_get_info_bits(rec, TRUE));
rec_print_comp(file, rec, offsets);
rec_validate(rec, offsets);
}
/***************************************************************//**
Prints a physical record. */
void
rec_print(
/*======*/
FILE* file, /*!< in: file where to print */
const rec_t* rec, /*!< in: physical record */
const dict_index_t* index) /*!< in: record descriptor */
{
ut_ad(index);
if (!dict_table_is_comp(index->table)) {
rec_print_old(file, rec);
return;
} else {
mem_heap_t* heap = NULL;
ulint offsets_[REC_OFFS_NORMAL_SIZE];
rec_offs_init(offsets_);
rec_print_new(file, rec,
rec_get_offsets(rec, index, offsets_,
page_rec_is_leaf(rec),
ULINT_UNDEFINED, &heap));
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
}
}
/** Pretty-print a record.
@param[in,out] o output stream
@param[in] rec physical record
@param[in] info rec_get_info_bits(rec)
@param[in] offsets rec_get_offsets(rec) */
void
rec_print(
std::ostream& o,
const rec_t* rec,
ulint info,
const ulint* offsets)
{
const ulint comp = rec_offs_comp(offsets);
const ulint n = rec_offs_n_fields(offsets);
ut_ad(rec_offs_validate(rec, NULL, offsets));
o << (comp ? "COMPACT RECORD" : "RECORD")
<< "(info_bits=" << info << ", " << n << " fields): {";
for (ulint i = 0; i < n; i++) {
const byte* data;
ulint len;
if (i) {
o << ',';
}
data = rec_get_nth_field(rec, offsets, i, &len);
if (len == UNIV_SQL_NULL) {
o << "NULL";
continue;
}
if (rec_offs_nth_extern(offsets, i)) {
ulint local_len = len - BTR_EXTERN_FIELD_REF_SIZE;
ut_ad(len >= BTR_EXTERN_FIELD_REF_SIZE);
o << '['
<< local_len
<< '+' << BTR_EXTERN_FIELD_REF_SIZE << ']';
ut_print_buf(o, data, local_len);
ut_print_buf_hex(o, data + local_len,
BTR_EXTERN_FIELD_REF_SIZE);
} else {
o << '[' << len << ']';
ut_print_buf(o, data, len);
}
}
o << "}";
}
/** Display a record.
@param[in,out] o output stream
@param[in] r record to display
@return the output stream */
std::ostream&
operator<<(std::ostream& o, const rec_index_print& r)
{
mem_heap_t* heap = NULL;
ulint* offsets = rec_get_offsets(
r.m_rec, r.m_index, NULL, page_rec_is_leaf(r.m_rec),
ULINT_UNDEFINED, &heap);
rec_print(o, r.m_rec,
rec_get_info_bits(r.m_rec, rec_offs_comp(offsets)),
offsets);
mem_heap_free(heap);
return(o);
}
/** Display a record.
@param[in,out] o output stream
@param[in] r record to display
@return the output stream */
std::ostream&
operator<<(std::ostream& o, const rec_offsets_print& r)
{
rec_print(o, r.m_rec,
rec_get_info_bits(r.m_rec, rec_offs_comp(r.m_offsets)),
r.m_offsets);
return(o);
}
#ifdef UNIV_DEBUG
/** Read the DB_TRX_ID of a clustered index record.
@param[in] rec clustered index record
@param[in] index clustered index
@return the value of DB_TRX_ID */
trx_id_t
rec_get_trx_id(
const rec_t* rec,
const dict_index_t* index)
{
ulint trx_id_col
= dict_index_get_sys_col_pos(index, DATA_TRX_ID);
const byte* trx_id;
ulint len;
mem_heap_t* heap = NULL;
ulint offsets_[REC_OFFS_HEADER_SIZE + MAX_REF_PARTS + 2];
rec_offs_init(offsets_);
ulint* offsets = offsets_;
ut_ad(trx_id_col <= MAX_REF_PARTS);
ut_ad(dict_index_is_clust(index));
ut_ad(trx_id_col > 0);
ut_ad(trx_id_col != ULINT_UNDEFINED);
offsets = rec_get_offsets(rec, index, offsets, true,
trx_id_col + 1, &heap);
trx_id = rec_get_nth_field(rec, offsets, trx_id_col, &len);
ut_ad(len == DATA_TRX_ID_LEN);
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
return(trx_read_trx_id(trx_id));
}
#endif /* UNIV_DEBUG */
/** Mark the nth field as externally stored.
@param[in] offsets array returned by rec_get_offsets()
@param[in] n nth field */
void
rec_offs_make_nth_extern(
ulint* offsets,
const ulint n)
{
ut_ad(!rec_offs_nth_sql_null(offsets, n));
rec_offs_base(offsets)[1 + n] |= REC_OFFS_EXTERNAL;
}
#ifdef WITH_WSREP
int
wsrep_rec_get_foreign_key(
byte *buf, /* out: extracted key */
ulint *buf_len, /* in/out: length of buf */
const rec_t* rec, /* in: physical record */
dict_index_t* index_for, /* in: index in foreign table */
dict_index_t* index_ref, /* in: index in referenced table */
ibool new_protocol) /* in: protocol > 1 */
{
const byte* data;
ulint len;
ulint key_len = 0;
ulint i;
uint key_parts;
mem_heap_t* heap = NULL;
ulint offsets_[REC_OFFS_NORMAL_SIZE];
const ulint* offsets;
ut_ad(index_for);
ut_ad(index_ref);
rec_offs_init(offsets_);
offsets = rec_get_offsets(rec, index_for, offsets_, true,
ULINT_UNDEFINED, &heap);
ut_ad(rec_offs_validate(rec, NULL, offsets));
ut_ad(rec);
key_parts = dict_index_get_n_unique_in_tree(index_for);
for (i = 0;
i < key_parts &&
(index_for->type & DICT_CLUSTERED || i < key_parts - 1);
i++) {
dict_field_t* field_f =
dict_index_get_nth_field(index_for, i);
const dict_col_t* col_f = dict_field_get_col(field_f);
dict_field_t* field_r =
dict_index_get_nth_field(index_ref, i);
const dict_col_t* col_r = dict_field_get_col(field_r);
data = rec_get_nth_field(rec, offsets, i, &len);
if (key_len + ((len != UNIV_SQL_NULL) ? len + 1 : 1) >
*buf_len) {
fprintf(stderr,
"WSREP: FK key len exceeded "
ULINTPF " " ULINTPF " " ULINTPF "\n",
key_len, len, *buf_len);
goto err_out;
}
if (len == UNIV_SQL_NULL) {
ut_a(!(col_f->prtype & DATA_NOT_NULL));
*buf++ = 1;
key_len++;
} else if (!new_protocol) {
if (!(col_r->prtype & DATA_NOT_NULL)) {
*buf++ = 0;
key_len++;
}
memcpy(buf, data, len);
*buf_len = wsrep_innobase_mysql_sort(
(int)(col_f->prtype & DATA_MYSQL_TYPE_MASK),
(uint)dtype_get_charset_coll(col_f->prtype),
buf, len, *buf_len);
} else { /* new protocol */
if (!(col_r->prtype & DATA_NOT_NULL)) {
*buf++ = 0;
key_len++;
}
switch (col_f->mtype) {
case DATA_INT: {
byte* ptr = buf+len;
for (;;) {
ptr--;
*ptr = *data;
if (ptr == buf) {
break;
}
data++;
}
if (!(col_f->prtype & DATA_UNSIGNED)) {
buf[len-1] = (byte) (buf[len-1] ^ 128);
}
break;
}
case DATA_VARCHAR:
case DATA_VARMYSQL:
case DATA_CHAR:
case DATA_MYSQL:
/* Copy the actual data */
ut_memcpy(buf, data, len);
len = wsrep_innobase_mysql_sort(
(int)
(col_f->prtype & DATA_MYSQL_TYPE_MASK),
(uint)
dtype_get_charset_coll(col_f->prtype),
buf, len, *buf_len);
break;
case DATA_BLOB:
case DATA_BINARY:
memcpy(buf, data, len);
break;
default:
break;
}
key_len += len;
buf += len;
}
}
rec_validate(rec, offsets);
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
*buf_len = key_len;
return DB_SUCCESS;
err_out:
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
return DB_ERROR;
}
#endif // WITH_WSREP
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