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/*****************************************************************************
Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
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 row/row0row.cc
General row routines
Created 4/20/1996 Heikki Tuuri
*******************************************************/
#include "ha_prototypes.h"
#include "row0row.h"
#ifdef UNIV_NONINL
#include "row0row.ic"
#endif
#include "data0type.h"
#include "dict0dict.h"
#include "dict0boot.h"
#include "btr0btr.h"
#include "mach0data.h"
#include "trx0rseg.h"
#include "trx0trx.h"
#include "trx0roll.h"
#include "trx0undo.h"
#include "trx0purge.h"
#include "trx0rec.h"
#include "que0que.h"
#include "row0ext.h"
#include "row0upd.h"
#include "rem0cmp.h"
#include "read0read.h"
#include "ut0mem.h"
#include "gis0geo.h"
#include "row0mysql.h"
/*****************************************************************//**
When an insert or purge to a table is performed, this function builds
the entry to be inserted into or purged from an index on the table.
@return index entry which should be inserted or purged
@retval NULL if the externally stored columns in the clustered index record
are unavailable and ext != NULL, or row is missing some needed columns. */
dtuple_t*
row_build_index_entry_low(
/*======================*/
const dtuple_t* row, /*!< in: row which should be
inserted or purged */
const row_ext_t* ext, /*!< in: externally stored column
prefixes, or NULL */
dict_index_t* index, /*!< in: index on the table */
mem_heap_t* heap, /*!< in: memory heap from which
the memory for the index entry
is allocated */
ulint flag) /*!< in: ROW_BUILD_NORMAL,
ROW_BUILD_FOR_PURGE
or ROW_BUILD_FOR_UNDO */
{
dtuple_t* entry;
ulint entry_len;
ulint i;
ulint num_v = 0;
entry_len = dict_index_get_n_fields(index);
if (flag == ROW_BUILD_FOR_INSERT && dict_index_is_clust(index)) {
num_v = dict_table_get_n_v_cols(index->table);
entry = dtuple_create_with_vcol(heap, entry_len, num_v);
} else {
entry = dtuple_create(heap, entry_len);
}
if (dict_index_is_ibuf(index)) {
dtuple_set_n_fields_cmp(entry, entry_len);
/* There may only be externally stored columns
in a clustered index B-tree of a user table. */
ut_a(!ext);
} else {
dtuple_set_n_fields_cmp(
entry, dict_index_get_n_unique_in_tree(index));
}
for (i = 0; i < entry_len + num_v; i++) {
const dict_field_t* ind_field = NULL;
const dict_col_t* col;
ulint col_no = 0;
dfield_t* dfield;
dfield_t* dfield2;
ulint len;
if (i >= entry_len) {
/* This is to insert new rows to cluster index */
ut_ad(dict_index_is_clust(index)
&& flag == ROW_BUILD_FOR_INSERT);
dfield = dtuple_get_nth_v_field(entry, i - entry_len);
col = &dict_table_get_nth_v_col(
index->table, i - entry_len)->m_col;
} else {
ind_field = dict_index_get_nth_field(index, i);
col = ind_field->col;
col_no = dict_col_get_no(col);
dfield = dtuple_get_nth_field(entry, i);
}
#if DATA_MISSING != 0
# error "DATA_MISSING != 0"
#endif
if (dict_col_is_virtual(col)) {
const dict_v_col_t* v_col
= reinterpret_cast<const dict_v_col_t*>(col);
ut_ad(v_col->v_pos < dtuple_get_n_v_fields(row));
dfield2 = dtuple_get_nth_v_field(row, v_col->v_pos);
ut_ad(dfield_is_null(dfield2) || dfield2->data);
} else {
dfield2 = dtuple_get_nth_field(row, col_no);
ut_ad(dfield_get_type(dfield2)->mtype == DATA_MISSING
|| (!(dfield_get_type(dfield2)->prtype
& DATA_VIRTUAL)));
}
if (UNIV_UNLIKELY(dfield_get_type(dfield2)->mtype
== DATA_MISSING)) {
/* The field has not been initialized in the row.
This should be from trx_undo_rec_get_partial_row(). */
return(NULL);
}
#ifdef UNIV_DEBUG
if (dfield_get_type(dfield2)->prtype & DATA_VIRTUAL
&& dict_index_is_clust(index)) {
ut_ad(flag == ROW_BUILD_FOR_INSERT);
}
#endif /* UNIV_DEBUG */
/* Special handle spatial index, set the first field
which is for store MBR. */
if (dict_index_is_spatial(index) && i == 0) {
double* mbr;
col_spatial_status spatial_status;
spatial_status = dict_col_get_spatial_status(col);
ut_ad(spatial_status != SPATIAL_NONE);
dfield_copy(dfield, dfield2);
dfield->type.prtype |= DATA_GIS_MBR;
/* Allocate memory for mbr field */
ulint mbr_len = DATA_MBR_LEN;
mbr = static_cast<double*>(mem_heap_alloc(heap, mbr_len));
/* Set mbr field data. */
dfield_set_data(dfield, mbr, mbr_len);
if (dfield2->data) {
uchar* dptr = NULL;
ulint dlen = 0;
ulint flen = 0;
double tmp_mbr[SPDIMS * 2];
mem_heap_t* temp_heap = NULL;
if (dfield_is_ext(dfield2)) {
if (flag == ROW_BUILD_FOR_PURGE) {
byte* ptr = NULL;
switch (spatial_status) {
case SPATIAL_ONLY:
ptr = static_cast<byte*>(
dfield_get_data(
dfield2));
ut_ad(dfield_get_len(dfield2)
== DATA_MBR_LEN);
break;
case SPATIAL_MIXED:
ptr = static_cast<byte*>(
dfield_get_data(
dfield2))
+ dfield_get_len(
dfield2);
break;
case SPATIAL_NONE:
ut_ad(0);
}
memcpy(mbr, ptr, DATA_MBR_LEN);
continue;
}
if (flag == ROW_BUILD_FOR_UNDO
&& dict_table_get_format(index->table)
>= UNIV_FORMAT_B) {
/* For build entry for undo, and
the table is Barrcuda, we need
to skip the prefix data. */
flen = BTR_EXTERN_FIELD_REF_SIZE;
ut_ad(dfield_get_len(dfield2) >=
BTR_EXTERN_FIELD_REF_SIZE);
dptr = static_cast<byte*>(
dfield_get_data(dfield2))
+ dfield_get_len(dfield2)
- BTR_EXTERN_FIELD_REF_SIZE;
} else {
flen = dfield_get_len(dfield2);
dptr = static_cast<byte*>(
dfield_get_data(dfield2));
}
temp_heap = mem_heap_create(1000);
const page_size_t page_size
= (ext != NULL)
? ext->page_size
: dict_table_page_size(
index->table);
dptr = btr_copy_externally_stored_field(
&dlen, dptr,
page_size,
flen,
temp_heap);
} else {
dptr = static_cast<uchar*>(
dfield_get_data(dfield2));
dlen = dfield_get_len(dfield2);
}
if (dlen <= GEO_DATA_HEADER_SIZE) {
for (uint i = 0; i < SPDIMS; ++i) {
tmp_mbr[i * 2] = DBL_MAX;
tmp_mbr[i * 2 + 1] = -DBL_MAX;
}
} else {
rtree_mbr_from_wkb(dptr + GEO_DATA_HEADER_SIZE,
static_cast<uint>(dlen
- GEO_DATA_HEADER_SIZE),
SPDIMS, tmp_mbr);
}
dfield_write_mbr(dfield, tmp_mbr);
if (temp_heap) {
mem_heap_free(temp_heap);
}
}
continue;
}
len = dfield_get_len(dfield2);
dfield_copy(dfield, dfield2);
if (dfield_is_null(dfield)) {
continue;
}
if ((!ind_field || ind_field->prefix_len == 0)
&& (!dfield_is_ext(dfield)
|| dict_index_is_clust(index))) {
/* The dfield_copy() above suffices for
columns that are stored in-page, or for
clustered index record columns that are not
part of a column prefix in the PRIMARY KEY,
or for virtaul columns in cluster index record. */
continue;
}
/* If the column is stored externally (off-page) in
the clustered index, it must be an ordering field in
the secondary index. In the Antelope format, only
prefix-indexed columns may be stored off-page in the
clustered index record. In the Barracuda format, also
fully indexed long CHAR or VARCHAR columns may be
stored off-page. */
ut_ad(col->ord_part);
if (ext) {
/* See if the column is stored externally. */
const byte* buf = row_ext_lookup(ext, col_no,
&len);
if (UNIV_LIKELY_NULL(buf)) {
if (UNIV_UNLIKELY(buf == field_ref_zero)) {
return(NULL);
}
dfield_set_data(dfield, buf, len);
}
if (ind_field->prefix_len == 0) {
/* In the Barracuda format
(ROW_FORMAT=DYNAMIC or
ROW_FORMAT=COMPRESSED), we can have a
secondary index on an entire column
that is stored off-page in the
clustered index. As this is not a
prefix index (prefix_len == 0),
include the entire off-page column in
the secondary index record. */
continue;
}
} else if (dfield_is_ext(dfield)) {
/* This table is either in Antelope format
(ROW_FORMAT=REDUNDANT or ROW_FORMAT=COMPACT)
or a purge record where the ordered part of
the field is not external.
In Antelope, the maximum column prefix
index length is 767 bytes, and the clustered
index record contains a 768-byte prefix of
each off-page column. */
ut_a(len >= BTR_EXTERN_FIELD_REF_SIZE);
len -= BTR_EXTERN_FIELD_REF_SIZE;
dfield_set_len(dfield, len);
}
/* If a column prefix index, take only the prefix. */
if (ind_field->prefix_len) {
len = dtype_get_at_most_n_mbchars(
col->prtype, col->mbminmaxlen,
ind_field->prefix_len, len,
static_cast<char*>(dfield_get_data(dfield)));
dfield_set_len(dfield, len);
}
}
return(entry);
}
/** An inverse function to row_build_index_entry. Builds a row from a
record in a clustered index, with possible indexing on ongoing
addition of new virtual columns.
@param[in] type ROW_COPY_POINTERS or ROW_COPY_DATA;
@param[in] index clustered index
@param[in] rec record in the clustered index
@param[in] offsets rec_get_offsets(rec,index) or NULL
@param[in] col_table table, to check which
externally stored columns
occur in the ordering columns
of an index, or NULL if
index->table should be
consulted instead
@param[in] add_cols default values of added columns, or NULL
@param[in] add_v new virtual columns added
along with new indexes
@param[in] col_map mapping of old column
numbers to new ones, or NULL
@param[in] ext cache of externally stored column
prefixes, or NULL
@param[in] heap memory heap from which
the memory needed is allocated
@return own: row built; */
static inline
dtuple_t*
row_build_low(
ulint type,
const dict_index_t* index,
const rec_t* rec,
const ulint* offsets,
const dict_table_t* col_table,
const dtuple_t* add_cols,
const dict_add_v_col_t* add_v,
const ulint* col_map,
row_ext_t** ext,
mem_heap_t* heap)
{
const byte* copy;
dtuple_t* row;
ulint n_ext_cols;
ulint* ext_cols = NULL; /* remove warning */
ulint len;
byte* buf;
ulint j;
mem_heap_t* tmp_heap = NULL;
ulint offsets_[REC_OFFS_NORMAL_SIZE];
rec_offs_init(offsets_);
ut_ad(index != NULL);
ut_ad(rec != NULL);
ut_ad(heap != NULL);
ut_ad(dict_index_is_clust(index));
ut_ad(!trx_sys_mutex_own());
ut_ad(!col_map || col_table);
if (!offsets) {
offsets = rec_get_offsets(rec, index, offsets_,
ULINT_UNDEFINED, &tmp_heap);
} else {
ut_ad(rec_offs_validate(rec, index, offsets));
}
#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
/* Some blob refs can be NULL during crash recovery before
trx_rollback_active() has completed execution, or when a concurrently
executing insert or update has committed the B-tree mini-transaction
but has not yet managed to restore the cursor position for writing
the big_rec. Note that the mini-transaction can be committed multiple
times, and the cursor restore can happen multiple times for single
insert or update statement. */
ut_a(!rec_offs_any_null_extern(rec, offsets)
|| trx_rw_is_active(row_get_rec_trx_id(rec, index, offsets),
NULL, false));
#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
if (type != ROW_COPY_POINTERS) {
/* Take a copy of rec to heap */
buf = static_cast<byte*>(
mem_heap_alloc(heap, rec_offs_size(offsets)));
copy = rec_copy(buf, rec, offsets);
} else {
copy = rec;
}
n_ext_cols = rec_offs_n_extern(offsets);
if (n_ext_cols) {
ext_cols = static_cast<ulint*>(
mem_heap_alloc(heap, n_ext_cols * sizeof *ext_cols));
}
/* Avoid a debug assertion in rec_offs_validate(). */
rec_offs_make_valid(copy, index, const_cast<ulint*>(offsets));
if (!col_table) {
ut_ad(!col_map);
ut_ad(!add_cols);
col_table = index->table;
}
if (add_cols) {
ut_ad(col_map);
row = dtuple_copy(add_cols, heap);
/* dict_table_copy_types() would set the fields to NULL */
for (ulint i = 0; i < dict_table_get_n_cols(col_table); i++) {
dict_col_copy_type(
dict_table_get_nth_col(col_table, i),
dfield_get_type(dtuple_get_nth_field(row, i)));
}
} else if (add_v != NULL) {
row = dtuple_create_with_vcol(
heap, dict_table_get_n_cols(col_table),
dict_table_get_n_v_cols(col_table) + add_v->n_v_col);
dict_table_copy_types(row, col_table);
for (ulint i = 0; i < add_v->n_v_col; i++) {
dict_col_copy_type(
&add_v->v_col[i].m_col,
dfield_get_type(dtuple_get_nth_v_field(
row, i + col_table->n_v_def)));
}
} else {
row = dtuple_create_with_vcol(
heap, dict_table_get_n_cols(col_table),
dict_table_get_n_v_cols(col_table));
dict_table_copy_types(row, col_table);
}
dtuple_set_info_bits(row, rec_get_info_bits(
copy, rec_offs_comp(offsets)));
j = 0;
for (ulint i = 0; i < rec_offs_n_fields(offsets); i++) {
const dict_field_t* ind_field
= dict_index_get_nth_field(index, i);
if (ind_field->prefix_len) {
/* Column prefixes can only occur in key
fields, which cannot be stored externally. For
a column prefix, there should also be the full
field in the clustered index tuple. The row
tuple comprises full fields, not prefixes. */
ut_ad(!rec_offs_nth_extern(offsets, i));
continue;
}
const dict_col_t* col
= dict_field_get_col(ind_field);
ulint col_no
= dict_col_get_no(col);
if (col_map) {
col_no = col_map[col_no];
if (col_no == ULINT_UNDEFINED) {
/* dropped column */
continue;
}
}
dfield_t* dfield = dtuple_get_nth_field(row, col_no);
const byte* field = rec_get_nth_field(
copy, offsets, i, &len);
dfield_set_data(dfield, field, len);
if (rec_offs_nth_extern(offsets, i)) {
dfield_set_ext(dfield);
col = dict_table_get_nth_col(col_table, col_no);
if (col->ord_part) {
/* We will have to fetch prefixes of
externally stored columns that are
referenced by column prefixes. */
ext_cols[j++] = col_no;
}
}
}
rec_offs_make_valid(rec, index, const_cast<ulint*>(offsets));
ut_ad(dtuple_check_typed(row));
if (!ext) {
/* REDUNDANT and COMPACT formats store a local
768-byte prefix of each externally stored
column. No cache is needed.
During online table rebuild,
row_log_table_apply_delete_low()
may use a cache that was set up by
row_log_table_delete(). */
} else if (j) {
*ext = row_ext_create(j, ext_cols, index->table->flags, row,
heap);
} else {
*ext = NULL;
}
if (tmp_heap) {
mem_heap_free(tmp_heap);
}
return(row);
}
/*******************************************************************//**
An inverse function to row_build_index_entry. Builds a row from a
record in a clustered index.
@return own: row built; see the NOTE below! */
dtuple_t*
row_build(
/*======*/
ulint type, /*!< in: ROW_COPY_POINTERS or
ROW_COPY_DATA; the latter
copies also the data fields to
heap while the first only
places pointers to data fields
on the index page, and thus is
more efficient */
const dict_index_t* index, /*!< in: clustered index */
const rec_t* rec, /*!< in: record in the clustered
index; NOTE: in the case
ROW_COPY_POINTERS the data
fields in the row will point
directly into this record,
therefore, the buffer page of
this record must be at least
s-latched and the latch held
as long as the row dtuple is used! */
const ulint* offsets,/*!< in: rec_get_offsets(rec,index)
or NULL, in which case this function
will invoke rec_get_offsets() */
const dict_table_t* col_table,
/*!< in: table, to check which
externally stored columns
occur in the ordering columns
of an index, or NULL if
index->table should be
consulted instead */
const dtuple_t* add_cols,
/*!< in: default values of
added columns, or NULL */
const ulint* col_map,/*!< in: mapping of old column
numbers to new ones, or NULL */
row_ext_t** ext, /*!< out, own: cache of
externally stored column
prefixes, or NULL */
mem_heap_t* heap) /*!< in: memory heap from which
the memory needed is allocated */
{
return(row_build_low(type, index, rec, offsets, col_table,
add_cols, NULL, col_map, ext, heap));
}
/** An inverse function to row_build_index_entry. Builds a row from a
record in a clustered index, with possible indexing on ongoing
addition of new virtual columns.
@param[in] type ROW_COPY_POINTERS or ROW_COPY_DATA;
@param[in] index clustered index
@param[in] rec record in the clustered index
@param[in] offsets rec_get_offsets(rec,index) or NULL
@param[in] col_table table, to check which
externally stored columns
occur in the ordering columns
of an index, or NULL if
index->table should be
consulted instead
@param[in] add_cols default values of added columns, or NULL
@param[in] add_v new virtual columns added
along with new indexes
@param[in] col_map mapping of old column
numbers to new ones, or NULL
@param[in] ext cache of externally stored column
prefixes, or NULL
@param[in] heap memory heap from which
the memory needed is allocated
@return own: row built; */
dtuple_t*
row_build_w_add_vcol(
ulint type,
const dict_index_t* index,
const rec_t* rec,
const ulint* offsets,
const dict_table_t* col_table,
const dtuple_t* add_cols,
const dict_add_v_col_t* add_v,
const ulint* col_map,
row_ext_t** ext,
mem_heap_t* heap)
{
return(row_build_low(type, index, rec, offsets, col_table,
add_cols, add_v, col_map, ext, heap));
}
/*******************************************************************//**
Converts an index record to a typed data tuple.
@return index entry built; does not set info_bits, and the data fields
in the entry will point directly to rec */
dtuple_t*
row_rec_to_index_entry_low(
/*=======================*/
const rec_t* rec, /*!< in: record in the index */
const dict_index_t* index, /*!< in: index */
const ulint* offsets,/*!< in: rec_get_offsets(rec, index) */
ulint* n_ext, /*!< out: number of externally
stored columns */
mem_heap_t* heap) /*!< in: memory heap from which
the memory needed is allocated */
{
dtuple_t* entry;
dfield_t* dfield;
ulint i;
const byte* field;
ulint len;
ulint rec_len;
ut_ad(rec != NULL);
ut_ad(heap != NULL);
ut_ad(index != NULL);
/* Because this function may be invoked by row0merge.cc
on a record whose header is in different format, the check
rec_offs_validate(rec, index, offsets) must be avoided here. */
ut_ad(n_ext);
*n_ext = 0;
rec_len = rec_offs_n_fields(offsets);
entry = dtuple_create(heap, rec_len);
dtuple_set_n_fields_cmp(entry,
dict_index_get_n_unique_in_tree(index));
ut_ad(rec_len == dict_index_get_n_fields(index)
/* a record for older SYS_INDEXES table
(missing merge_threshold column) is acceptable. */
|| (index->table->id == DICT_INDEXES_ID
&& rec_len == dict_index_get_n_fields(index) - 1));
dict_index_copy_types(entry, index, rec_len);
for (i = 0; i < rec_len; i++) {
dfield = dtuple_get_nth_field(entry, i);
field = rec_get_nth_field(rec, offsets, i, &len);
dfield_set_data(dfield, field, len);
if (rec_offs_nth_extern(offsets, i)) {
dfield_set_ext(dfield);
(*n_ext)++;
}
}
ut_ad(dtuple_check_typed(entry));
return(entry);
}
/*******************************************************************//**
Converts an index record to a typed data tuple. NOTE that externally
stored (often big) fields are NOT copied to heap.
@return own: index entry built */
dtuple_t*
row_rec_to_index_entry(
/*===================*/
const rec_t* rec, /*!< in: record in the index */
const dict_index_t* index, /*!< in: index */
const ulint* offsets,/*!< in: rec_get_offsets(rec) */
ulint* n_ext, /*!< out: number of externally
stored columns */
mem_heap_t* heap) /*!< in: memory heap from which
the memory needed is allocated */
{
dtuple_t* entry;
byte* buf;
const rec_t* copy_rec;
ut_ad(rec != NULL);
ut_ad(heap != NULL);
ut_ad(index != NULL);
ut_ad(rec_offs_validate(rec, index, offsets));
/* Take a copy of rec to heap */
buf = static_cast<byte*>(
mem_heap_alloc(heap, rec_offs_size(offsets)));
copy_rec = rec_copy(buf, rec, offsets);
rec_offs_make_valid(copy_rec, index, const_cast<ulint*>(offsets));
entry = row_rec_to_index_entry_low(
copy_rec, index, offsets, n_ext, heap);
rec_offs_make_valid(rec, index, const_cast<ulint*>(offsets));
dtuple_set_info_bits(entry,
rec_get_info_bits(rec, rec_offs_comp(offsets)));
return(entry);
}
/*******************************************************************//**
Builds from a secondary index record a row reference with which we can
search the clustered index record.
@return own: row reference built; see the NOTE below! */
dtuple_t*
row_build_row_ref(
/*==============*/
ulint type, /*!< in: ROW_COPY_DATA, or ROW_COPY_POINTERS:
the former copies also the data fields to
heap, whereas the latter only places pointers
to data fields on the index page */
dict_index_t* index, /*!< in: secondary index */
const rec_t* rec, /*!< in: record in the index;
NOTE: in the case ROW_COPY_POINTERS
the data fields in the row will point
directly into this record, therefore,
the buffer page of this record must be
at least s-latched and the latch held
as long as the row reference is used! */
mem_heap_t* heap) /*!< in: memory heap from which the memory
needed is allocated */
{
dict_table_t* table;
dict_index_t* clust_index;
dfield_t* dfield;
dtuple_t* ref;
const byte* field;
ulint len;
ulint ref_len;
ulint pos;
byte* buf;
ulint clust_col_prefix_len;
ulint i;
mem_heap_t* tmp_heap = NULL;
ulint offsets_[REC_OFFS_NORMAL_SIZE];
ulint* offsets = offsets_;
rec_offs_init(offsets_);
ut_ad(index != NULL);
ut_ad(rec != NULL);
ut_ad(heap != NULL);
ut_ad(!dict_index_is_clust(index));
offsets = rec_get_offsets(rec, index, offsets,
ULINT_UNDEFINED, &tmp_heap);
/* Secondary indexes must not contain externally stored columns. */
ut_ad(!rec_offs_any_extern(offsets));
if (type == ROW_COPY_DATA) {
/* Take a copy of rec to heap */
buf = static_cast<byte*>(
mem_heap_alloc(heap, rec_offs_size(offsets)));
rec = rec_copy(buf, rec, offsets);
/* Avoid a debug assertion in rec_offs_validate(). */
rec_offs_make_valid(rec, index, offsets);
}
table = index->table;
clust_index = dict_table_get_first_index(table);
ref_len = dict_index_get_n_unique(clust_index);
ref = dtuple_create(heap, ref_len);
dict_index_copy_types(ref, clust_index, ref_len);
for (i = 0; i < ref_len; i++) {
dfield = dtuple_get_nth_field(ref, i);
pos = dict_index_get_nth_field_pos(index, clust_index, i);
ut_a(pos != ULINT_UNDEFINED);
field = rec_get_nth_field(rec, offsets, pos, &len);
dfield_set_data(dfield, field, len);
/* If the primary key contains a column prefix, then the
secondary index may contain a longer prefix of the same
column, or the full column, and we must adjust the length
accordingly. */
clust_col_prefix_len = dict_index_get_nth_field(
clust_index, i)->prefix_len;
if (clust_col_prefix_len > 0) {
if (len != UNIV_SQL_NULL) {
const dtype_t* dtype
= dfield_get_type(dfield);
dfield_set_len(dfield,
dtype_get_at_most_n_mbchars(
dtype->prtype,
dtype->mbminmaxlen,
clust_col_prefix_len,
len, (char*) field));
}
}
}
ut_ad(dtuple_check_typed(ref));
if (tmp_heap) {
mem_heap_free(tmp_heap);
}
return(ref);
}
/*******************************************************************//**
Builds from a secondary index record a row reference with which we can
search the clustered index record. */
void
row_build_row_ref_in_tuple(
/*=======================*/
dtuple_t* ref, /*!< in/out: row reference built;
see the NOTE below! */
const rec_t* rec, /*!< in: record in the index;
NOTE: the data fields in ref
will point directly into this
record, therefore, the buffer
page of this record must be at
least s-latched and the latch
held as long as the row
reference is used! */
const dict_index_t* index, /*!< in: secondary index */
ulint* offsets,/*!< in: rec_get_offsets(rec, index)
or NULL */
trx_t* trx) /*!< in: transaction */
{
const dict_index_t* clust_index;
dfield_t* dfield;
const byte* field;
ulint len;
ulint ref_len;
ulint pos;
ulint clust_col_prefix_len;
ulint i;
mem_heap_t* heap = NULL;
ulint offsets_[REC_OFFS_NORMAL_SIZE];
rec_offs_init(offsets_);
ut_a(ref);
ut_a(index);
ut_a(rec);
ut_ad(!dict_index_is_clust(index));
ut_a(index->table);
clust_index = dict_table_get_first_index(index->table);
ut_ad(clust_index);
if (!offsets) {
offsets = rec_get_offsets(rec, index, offsets_,
ULINT_UNDEFINED, &heap);
} else {
ut_ad(rec_offs_validate(rec, index, offsets));
}
/* Secondary indexes must not contain externally stored columns. */
ut_ad(!rec_offs_any_extern(offsets));
ref_len = dict_index_get_n_unique(clust_index);
ut_ad(ref_len == dtuple_get_n_fields(ref));
dict_index_copy_types(ref, clust_index, ref_len);
for (i = 0; i < ref_len; i++) {
dfield = dtuple_get_nth_field(ref, i);
pos = dict_index_get_nth_field_pos(index, clust_index, i);
ut_a(pos != ULINT_UNDEFINED);
field = rec_get_nth_field(rec, offsets, pos, &len);
dfield_set_data(dfield, field, len);
/* If the primary key contains a column prefix, then the
secondary index may contain a longer prefix of the same
column, or the full column, and we must adjust the length
accordingly. */
clust_col_prefix_len = dict_index_get_nth_field(
clust_index, i)->prefix_len;
if (clust_col_prefix_len > 0) {
if (len != UNIV_SQL_NULL) {
const dtype_t* dtype
= dfield_get_type(dfield);
dfield_set_len(dfield,
dtype_get_at_most_n_mbchars(
dtype->prtype,
dtype->mbminmaxlen,
clust_col_prefix_len,
len, (char*) field));
}
}
}
ut_ad(dtuple_check_typed(ref));
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
}
/***************************************************************//**
Searches the clustered index record for a row, if we have the row reference.
@return TRUE if found */
ibool
row_search_on_row_ref(
/*==================*/
btr_pcur_t* pcur, /*!< out: persistent cursor, which must
be closed by the caller */
ulint mode, /*!< in: BTR_MODIFY_LEAF, ... */
const dict_table_t* table, /*!< in: table */
const dtuple_t* ref, /*!< in: row reference */
mtr_t* mtr) /*!< in/out: mtr */
{
ulint low_match;
rec_t* rec;
dict_index_t* index;
ut_ad(dtuple_check_typed(ref));
index = dict_table_get_first_index(table);
ut_a(dtuple_get_n_fields(ref) == dict_index_get_n_unique(index));
btr_pcur_open(index, ref, PAGE_CUR_LE, mode, pcur, mtr);
low_match = btr_pcur_get_low_match(pcur);
rec = btr_pcur_get_rec(pcur);
if (page_rec_is_infimum(rec)) {
return(FALSE);
}
if (low_match != dtuple_get_n_fields(ref)) {
return(FALSE);
}
return(TRUE);
}
/*********************************************************************//**
Fetches the clustered index record for a secondary index record. The latches
on the secondary index record are preserved.
@return record or NULL, if no record found */
rec_t*
row_get_clust_rec(
/*==============*/
ulint mode, /*!< in: BTR_MODIFY_LEAF, ... */
const rec_t* rec, /*!< in: record in a secondary index */
dict_index_t* index, /*!< in: secondary index */
dict_index_t** clust_index,/*!< out: clustered index */
mtr_t* mtr) /*!< in: mtr */
{
mem_heap_t* heap;
dtuple_t* ref;
dict_table_t* table;
btr_pcur_t pcur;
ibool found;
rec_t* clust_rec;
ut_ad(!dict_index_is_clust(index));
table = index->table;
heap = mem_heap_create(256);
ref = row_build_row_ref(ROW_COPY_POINTERS, index, rec, heap);
found = row_search_on_row_ref(&pcur, mode, table, ref, mtr);
clust_rec = found ? btr_pcur_get_rec(&pcur) : NULL;
mem_heap_free(heap);
btr_pcur_close(&pcur);
*clust_index = dict_table_get_first_index(table);
return(clust_rec);
}
/***************************************************************//**
Searches an index record.
@return whether the record was found or buffered */
enum row_search_result
row_search_index_entry(
/*===================*/
dict_index_t* index, /*!< in: index */
const dtuple_t* entry, /*!< in: index entry */
ulint mode, /*!< in: BTR_MODIFY_LEAF, ... */
btr_pcur_t* pcur, /*!< in/out: persistent cursor, which must
be closed by the caller */
mtr_t* mtr) /*!< in: mtr */
{
ulint n_fields;
ulint low_match;
rec_t* rec;
ut_ad(dtuple_check_typed(entry));
if (dict_index_is_spatial(index)) {
ut_ad(mode & BTR_MODIFY_LEAF || mode & BTR_MODIFY_TREE);
rtr_pcur_open(index, entry, PAGE_CUR_RTREE_LOCATE,
mode, pcur, mtr);
} else {
btr_pcur_open(index, entry, PAGE_CUR_LE, mode, pcur, mtr);
}
switch (btr_pcur_get_btr_cur(pcur)->flag) {
case BTR_CUR_DELETE_REF:
ut_a(mode & BTR_DELETE && !dict_index_is_spatial(index));
return(ROW_NOT_DELETED_REF);
case BTR_CUR_DEL_MARK_IBUF:
case BTR_CUR_DELETE_IBUF:
case BTR_CUR_INSERT_TO_IBUF:
return(ROW_BUFFERED);
case BTR_CUR_HASH:
case BTR_CUR_HASH_FAIL:
case BTR_CUR_BINARY:
break;
}
low_match = btr_pcur_get_low_match(pcur);
rec = btr_pcur_get_rec(pcur);
n_fields = dtuple_get_n_fields(entry);
if (page_rec_is_infimum(rec)) {
return(ROW_NOT_FOUND);
} else if (low_match != n_fields) {
return(ROW_NOT_FOUND);
}
return(ROW_FOUND);
}
/*******************************************************************//**
Formats the raw data in "data" (in InnoDB on-disk format) that is of
type DATA_INT using "prtype" and writes the result to "buf".
If the data is in unknown format, then nothing is written to "buf",
0 is returned and "format_in_hex" is set to TRUE, otherwise
"format_in_hex" is left untouched.
Not more than "buf_size" bytes are written to "buf".
The result is always '\0'-terminated (provided buf_size > 0) and the
number of bytes that were written to "buf" is returned (including the
terminating '\0').
@return number of bytes that were written */
static
ulint
row_raw_format_int(
/*===============*/
const char* data, /*!< in: raw data */
ulint data_len, /*!< in: raw data length
in bytes */
ulint prtype, /*!< in: precise type */
char* buf, /*!< out: output buffer */
ulint buf_size, /*!< in: output buffer size
in bytes */
ibool* format_in_hex) /*!< out: should the data be
formated in hex */
{
ulint ret;
if (data_len <= sizeof(ib_uint64_t)) {
ib_uint64_t value;
ibool unsigned_type = prtype & DATA_UNSIGNED;
value = mach_read_int_type(
(const byte*) data, data_len, unsigned_type);
ret = ut_snprintf(
buf, buf_size,
unsigned_type ? UINT32PF : "%f", unsigned_type ? value : (double)value) + 1;
} else {
*format_in_hex = TRUE;
ret = 0;
}
return(ut_min(ret, buf_size));
}
/*******************************************************************//**
Formats the raw data in "data" (in InnoDB on-disk format) that is of
type DATA_(CHAR|VARCHAR|MYSQL|VARMYSQL) using "prtype" and writes the
result to "buf".
If the data is in binary format, then nothing is written to "buf",
0 is returned and "format_in_hex" is set to TRUE, otherwise
"format_in_hex" is left untouched.
Not more than "buf_size" bytes are written to "buf".
The result is always '\0'-terminated (provided buf_size > 0) and the
number of bytes that were written to "buf" is returned (including the
terminating '\0').
@return number of bytes that were written */
static
ulint
row_raw_format_str(
/*===============*/
const char* data, /*!< in: raw data */
ulint data_len, /*!< in: raw data length
in bytes */
ulint prtype, /*!< in: precise type */
char* buf, /*!< out: output buffer */
ulint buf_size, /*!< in: output buffer size
in bytes */
ibool* format_in_hex) /*!< out: should the data be
formated in hex */
{
ulint charset_coll;
if (buf_size == 0) {
return(0);
}
/* we assume system_charset_info is UTF-8 */
charset_coll = dtype_get_charset_coll(prtype);
if (UNIV_LIKELY(dtype_is_utf8(prtype))) {
return(ut_str_sql_format(data, data_len, buf, buf_size));
}
/* else */
if (charset_coll == DATA_MYSQL_BINARY_CHARSET_COLL) {
*format_in_hex = TRUE;
return(0);
}
/* else */
return(innobase_raw_format(data, data_len, charset_coll,
buf, buf_size));
}
/*******************************************************************//**
Formats the raw data in "data" (in InnoDB on-disk format) using
"dict_field" and writes the result to "buf".
Not more than "buf_size" bytes are written to "buf".
The result is always NUL-terminated (provided buf_size is positive) and the
number of bytes that were written to "buf" is returned (including the
terminating NUL).
@return number of bytes that were written */
ulint
row_raw_format(
/*===========*/
const char* data, /*!< in: raw data */
ulint data_len, /*!< in: raw data length
in bytes */
const dict_field_t* dict_field, /*!< in: index field */
char* buf, /*!< out: output buffer */
ulint buf_size) /*!< in: output buffer size
in bytes */
{
ulint mtype;
ulint prtype;
ulint ret;
ibool format_in_hex;
if (buf_size == 0) {
return(0);
}
if (data_len == UNIV_SQL_NULL) {
ret = ut_snprintf((char*) buf, buf_size, "NULL") + 1;
return(ut_min(ret, buf_size));
}
mtype = dict_field->col->mtype;
prtype = dict_field->col->prtype;
format_in_hex = FALSE;
switch (mtype) {
case DATA_INT:
ret = row_raw_format_int(data, data_len, prtype,
buf, buf_size, &format_in_hex);
if (format_in_hex) {
goto format_in_hex;
}
break;
case DATA_CHAR:
case DATA_VARCHAR:
case DATA_MYSQL:
case DATA_VARMYSQL:
ret = row_raw_format_str(data, data_len, prtype,
buf, buf_size, &format_in_hex);
if (format_in_hex) {
goto format_in_hex;
}
break;
/* XXX support more data types */
default:
format_in_hex:
if (UNIV_LIKELY(buf_size > 2)) {
memcpy(buf, "0x", 2);
buf += 2;
buf_size -= 2;
ret = 2 + ut_raw_to_hex(data, data_len,
buf, buf_size);
} else {
buf[0] = '\0';
ret = 1;
}
}
return(ret);
}
#ifdef UNIV_ENABLE_UNIT_TEST_ROW_RAW_FORMAT_INT
#ifdef HAVE_UT_CHRONO_T
void
test_row_raw_format_int()
{
ulint ret;
char buf[128];
ibool format_in_hex;
ulint i;
#define CALL_AND_TEST(data, data_len, prtype, buf, buf_size,\
ret_expected, buf_expected, format_in_hex_expected)\
do {\
ibool ok = TRUE;\
ulint i;\
memset(buf, 'x', 10);\
buf[10] = '\0';\
format_in_hex = FALSE;\
fprintf(stderr, "TESTING \"\\x");\
for (i = 0; i < data_len; i++) {\
fprintf(stderr, "%02hhX", data[i]);\
}\
fprintf(stderr, "\", %lu, %lu, %lu\n",\
(ulint) data_len, (ulint) prtype,\
(ulint) buf_size);\
ret = row_raw_format_int(data, data_len, prtype,\
buf, buf_size, &format_in_hex);\
if (ret != ret_expected) {\
fprintf(stderr, "expected ret %lu, got %lu\n",\
(ulint) ret_expected, ret);\
ok = FALSE;\
}\
if (strcmp((char*) buf, buf_expected) != 0) {\
fprintf(stderr, "expected buf \"%s\", got \"%s\"\n",\
buf_expected, buf);\
ok = FALSE;\
}\
if (format_in_hex != format_in_hex_expected) {\
fprintf(stderr, "expected format_in_hex %d, got %d\n",\
(int) format_in_hex_expected,\
(int) format_in_hex);\
ok = FALSE;\
}\
if (ok) {\
fprintf(stderr, "OK: %lu, \"%s\" %d\n\n",\
(ulint) ret, buf, (int) format_in_hex);\
} else {\
return;\
}\
} while (0)
#if 1
/* min values for signed 1-8 byte integers */
CALL_AND_TEST("\x00", 1, 0,
buf, sizeof(buf), 5, "-128", 0);
CALL_AND_TEST("\x00\x00", 2, 0,
buf, sizeof(buf), 7, "-32768", 0);
CALL_AND_TEST("\x00\x00\x00", 3, 0,
buf, sizeof(buf), 9, "-8388608", 0);
CALL_AND_TEST("\x00\x00\x00\x00", 4, 0,
buf, sizeof(buf), 12, "-2147483648", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00", 5, 0,
buf, sizeof(buf), 14, "-549755813888", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00", 6, 0,
buf, sizeof(buf), 17, "-140737488355328", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00\x00", 7, 0,
buf, sizeof(buf), 19, "-36028797018963968", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00\x00\x00", 8, 0,
buf, sizeof(buf), 21, "-9223372036854775808", 0);
/* min values for unsigned 1-8 byte integers */
CALL_AND_TEST("\x00", 1, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00", 2, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00", 3, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00\x00", 4, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00", 5, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00", 6, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00\x00", 7, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x00\x00\x00", 8, DATA_UNSIGNED,
buf, sizeof(buf), 2, "0", 0);
/* max values for signed 1-8 byte integers */
CALL_AND_TEST("\xFF", 1, 0,
buf, sizeof(buf), 4, "127", 0);
CALL_AND_TEST("\xFF\xFF", 2, 0,
buf, sizeof(buf), 6, "32767", 0);
CALL_AND_TEST("\xFF\xFF\xFF", 3, 0,
buf, sizeof(buf), 8, "8388607", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF", 4, 0,
buf, sizeof(buf), 11, "2147483647", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF", 5, 0,
buf, sizeof(buf), 13, "549755813887", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF", 6, 0,
buf, sizeof(buf), 16, "140737488355327", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 7, 0,
buf, sizeof(buf), 18, "36028797018963967", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8, 0,
buf, sizeof(buf), 20, "9223372036854775807", 0);
/* max values for unsigned 1-8 byte integers */
CALL_AND_TEST("\xFF", 1, DATA_UNSIGNED,
buf, sizeof(buf), 4, "255", 0);
CALL_AND_TEST("\xFF\xFF", 2, DATA_UNSIGNED,
buf, sizeof(buf), 6, "65535", 0);
CALL_AND_TEST("\xFF\xFF\xFF", 3, DATA_UNSIGNED,
buf, sizeof(buf), 9, "16777215", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF", 4, DATA_UNSIGNED,
buf, sizeof(buf), 11, "4294967295", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF", 5, DATA_UNSIGNED,
buf, sizeof(buf), 14, "1099511627775", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF", 6, DATA_UNSIGNED,
buf, sizeof(buf), 16, "281474976710655", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 7, DATA_UNSIGNED,
buf, sizeof(buf), 18, "72057594037927935", 0);
CALL_AND_TEST("\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8, DATA_UNSIGNED,
buf, sizeof(buf), 21, "18446744073709551615", 0);
/* some random values */
CALL_AND_TEST("\x52", 1, 0,
buf, sizeof(buf), 4, "-46", 0);
CALL_AND_TEST("\x0E", 1, DATA_UNSIGNED,
buf, sizeof(buf), 3, "14", 0);
CALL_AND_TEST("\x62\xCE", 2, 0,
buf, sizeof(buf), 6, "-7474", 0);
CALL_AND_TEST("\x29\xD6", 2, DATA_UNSIGNED,
buf, sizeof(buf), 6, "10710", 0);
CALL_AND_TEST("\x7F\xFF\x90", 3, 0,
buf, sizeof(buf), 5, "-112", 0);
CALL_AND_TEST("\x00\xA1\x16", 3, DATA_UNSIGNED,
buf, sizeof(buf), 6, "41238", 0);
CALL_AND_TEST("\x7F\xFF\xFF\xF7", 4, 0,
buf, sizeof(buf), 3, "-9", 0);
CALL_AND_TEST("\x00\x00\x00\x5C", 4, DATA_UNSIGNED,
buf, sizeof(buf), 3, "92", 0);
CALL_AND_TEST("\x7F\xFF\xFF\xFF\xFF\xFF\xDC\x63", 8, 0,
buf, sizeof(buf), 6, "-9117", 0);
CALL_AND_TEST("\x00\x00\x00\x00\x00\x01\x64\x62", 8, DATA_UNSIGNED,
buf, sizeof(buf), 6, "91234", 0);
#endif
/* speed test */
ut_chrono_t ch(__func__);
for (i = 0; i < 1000000; i++) {
row_raw_format_int("\x23", 1,
0, buf, sizeof(buf),
&format_in_hex);
row_raw_format_int("\x23", 1,
DATA_UNSIGNED, buf, sizeof(buf),
&format_in_hex);
row_raw_format_int("\x00\x00\x00\x00\x00\x01\x64\x62", 8,
0, buf, sizeof(buf),
&format_in_hex);
row_raw_format_int("\x00\x00\x00\x00\x00\x01\x64\x62", 8,
DATA_UNSIGNED, buf, sizeof(buf),
&format_in_hex);
}
}
#endif /* HAVE_UT_CHRONO_T */
#endif /* UNIV_ENABLE_UNIT_TEST_ROW_RAW_FORMAT_INT */
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