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mariadb/storage/innobase/dict/dict0load.c
aivanov@mysql.com d33b523271 Applied innodb-5.1-ss269 snapshot. 
Fixed BUGS:
  #3300: "UPDATE statement with no index column in where condition locks
    all rows"
    Implement semi-consistent read to reduce lock conflicts at the cost
    of breaking serializability.
    ha_innobase::unlock_row(): reset the "did semi consistent read" flag
    ha_innobase::was_semi_consistent_read(),
    ha_innobase::try_semi_consistent_read(): new methods
    row_prebuilt_t, row_create_prebuilt(): add field row_read_type for
    keeping track of semi-consistent reads
    row_vers_build_for_semi_consistent_read(),
    row_sel_build_committed_vers_for_mysql(): new functions
    row_search_for_mysql(): implement semi-consistent reads

  #9802: "Foreign key checks disallow alter table".
    Added test cases.

  #12456: "Cursor shows incorrect data - DML does not affect,
    probably caching"
    This patch implements a high-granularity read view to be used with
    cursors. In this high-granularity consistent read view modifications 
    done by the creating transaction after the cursor is created or 
   future transactions are not visible. But those modifications that 
   transaction did before the cursor was created are visible.

  #12701: "Support >4GB buffer pool and log files on 64-bit Windows"
    Do not call os_file_create_tmpfile() at runtime. Instead, create all
    tempfiles at startup and guard access to them with mutexes.

  #13778: "If FOREIGN_KEY_CHECKS=0, one can create inconsistent FOREIGN KEYs".
    When FOREIGN_KEY_CHECKS=0 we still need to check that datatypes between
    foreign key references are compatible.

  #14189: "VARBINARY and BINARY variables: trailing space ignored with InnoDB"
    innobase_init(): Assert that
    DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number.
    dtype_get_pad_char(): Do not pad VARBINARY or BINARY columns.
    row_ins_cascade_calc_update_vec(): Refuse ON UPDATE CASCADE when trying
    to change the length of a VARBINARY column that refers to or is referenced
    by a BINARY column. BINARY columns are no longer padded on comparison,
    and thus they cannot be padded on storage either.

  #14747: "Race condition can cause btr_search_drop_page_hash_index() to crash"
    Note that buf_block_t::index should be protected by btr_search_latch
    or an s-latch or x-latch on the index page.
    btr_search_drop_page_hash_index(): Read block->index while holding
    btr_search_latch and use the cached value in the loop.  Remove some
    redundant assertions.

  #15108: "mysqld crashes when innodb_log_file_size is set > 4G"

  #15308: "Problem of Order with Enum Column in Primary Key"

  #15550: "mysqld crashes in printing a FOREIGN KEY error in InnoDB"
    row_ins_foreign_report_add_err(): When printing the parent record,
    use the index in the parent table rather than the index in the child table.

  #15653: "Slow inserts to InnoDB if many thousands of .ibd files"
    Keep track on unflushed modifications to file spaces.  When there are tens
    of thousands of file spaces, flushing all files in fil_flush_file_spaces()
    would be very slow.
    fil_flush_file_spaces(): Only flush unflushed file spaces.
    fil_space_t, fil_system_t: Add a list of unflushed spaces.

  #15991: "innodb-file-per-table + symlink database + rename = cr"
   os_file_handle_error(): Map the error codes EXDEV, ENOTDIR, and EISDIR
   to the new code OS_FILE_PATH_ERROR. Treat this code as OS_FILE_PATH_ERROR.
   This fixes the crash on RENAME TABLE when the .ibd file is a symbolic link
   to a different file system.

  #16157: "InnoDB crashes when main location settings are empty"
    This patch is from Heikki.

  #16298: "InnoDB segfaults in INSERTs in upgrade of 4.0 -> 5.0 tables
    with VARCHAR BINARY"
    dict_load_columns(): Set the charset-collation code
    DATA_MYSQL_BINARY_CHARSET_COLL for those binary string columns
    that lack a charset-collation code, i.e., the tables were created
    with an older version of MySQL/InnoDB than 4.1.2.

  #16229: "MySQL/InnoDB uses full explicit table locks in trigger processing"
    Take a InnoDB table lock only if user has explicitly requested a table
    lock. Added some additional comments to store_lock() and external_lock().

  #16387: "InnoDB crash when dropping a foreign key <table>_ibfk_0"
    Do not mistake TABLENAME_ibfk_0 for auto-generated id.
    dict_table_get_highest_foreign_id(): Ignore foreign constraint
    identifiers starting with the pattern TABLENAME_ibfk_0.

  #16582: "InnoDB: Error in an adaptive hash index pointer to page"
    Account for a race condition when dropping the adaptive hash index
    for a B-tree page.
    btr_search_drop_page_hash_index(): Retry the operation if a hash index
    with different parameters was built meanwhile.  Add diagnostics for the
    case that hash node pointers to the page remain.
    btr_search_info_update_hash(), btr_search_info_update_slow():
    Document the parameter "info" as in/out.

  #16814: "SHOW INNODB STATUS format error in LATEST FOREIGN KEY ERROR
    section"
    Add a missing newline to the LAST FOREIGN KEY ERROR section in SHOW
    INNODB STATUS output.
    dict_foreign_error_report(): Always print a newline after invoking
    dict_print_info_on_foreign_key_in_create_format().

  #16827: "Better InnoDB error message if ibdata files omitted from my.cnf"

  #17126: "CHECK TABLE on InnoDB causes a short hang during check of adaptive
    hash"
    CHECK TABLE blocking other queries, by releasing the btr_search_latch
    periodically during the adaptive hash table validation.

  #17405: "Valgrind: conditional jump or move depends on unititialised values"
    buf_block_init(): Reset magic_n, buf_fix_count and io_fix to avoid
    testing uninitialized variables.
2006-03-10 19:22:21 +03:00

1371 lines
33 KiB
C
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/******************************************************
Loads to the memory cache database object definitions
from dictionary tables
(c) 1996 Innobase Oy
Created 4/24/1996 Heikki Tuuri
*******************************************************/
#include "dict0load.h"
#ifndef UNIV_HOTBACKUP
#include "mysql_version.h"
#endif /* !UNIV_HOTBACKUP */
#ifdef UNIV_NONINL
#include "dict0load.ic"
#endif
#include "btr0pcur.h"
#include "btr0btr.h"
#include "page0page.h"
#include "mach0data.h"
#include "dict0dict.h"
#include "dict0boot.h"
#include "rem0cmp.h"
#include "srv0start.h"
#include "srv0srv.h"
/************************************************************************
Finds the first table name in the given database. */
char*
dict_get_first_table_name_in_db(
/*============================*/
/* out, own: table name, NULL if
does not exist; the caller must
free the memory in the string! */
const char* name) /* in: database name which ends in '/' */
{
dict_table_t* sys_tables;
btr_pcur_t pcur;
dict_index_t* sys_index;
dtuple_t* tuple;
mem_heap_t* heap;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
heap = mem_heap_create(1000);
mtr_start(&mtr);
sys_tables = dict_table_get_low("SYS_TABLES");
sys_index = UT_LIST_GET_FIRST(sys_tables->indexes);
ut_a(!dict_table_is_comp(sys_tables));
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, name, ut_strlen(name));
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
loop:
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) {
/* Not found */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
field = rec_get_nth_field_old(rec, 0, &len);
if (len < strlen(name)
|| ut_memcmp(name, field, strlen(name)) != 0) {
/* Not found */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
if (!rec_get_deleted_flag(rec, 0)) {
/* We found one */
char* table_name = mem_strdupl((char*) field, len);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(table_name);
}
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
goto loop;
}
/************************************************************************
Prints to the standard output information on all tables found in the data
dictionary system table. */
void
dict_print(void)
/*============*/
{
dict_table_t* sys_tables;
dict_index_t* sys_index;
dict_table_t* table;
btr_pcur_t pcur;
rec_t* rec;
byte* field;
ulint len;
mtr_t mtr;
/* Enlarge the fatal semaphore wait timeout during the InnoDB table
monitor printout */
mutex_enter(&kernel_mutex);
srv_fatal_semaphore_wait_threshold += 7200; /* 2 hours */
mutex_exit(&kernel_mutex);
mutex_enter(&(dict_sys->mutex));
mtr_start(&mtr);
sys_tables = dict_table_get_low("SYS_TABLES");
sys_index = UT_LIST_GET_FIRST(sys_tables->indexes);
btr_pcur_open_at_index_side(TRUE, sys_index, BTR_SEARCH_LEAF, &pcur,
TRUE, &mtr);
loop:
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) {
/* end of index */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mutex_exit(&(dict_sys->mutex));
/* Restore the fatal semaphore wait timeout */
mutex_enter(&kernel_mutex);
srv_fatal_semaphore_wait_threshold -= 7200; /* 2 hours */
mutex_exit(&kernel_mutex);
return;
}
field = rec_get_nth_field_old(rec, 0, &len);
if (!rec_get_deleted_flag(rec, 0)) {
/* We found one */
char* table_name = mem_strdupl((char*) field, len);
btr_pcur_store_position(&pcur, &mtr);
mtr_commit(&mtr);
table = dict_table_get_low(table_name);
mem_free(table_name);
if (table == NULL) {
fputs("InnoDB: Failed to load table ", stderr);
ut_print_namel(stderr, NULL, (char*) field, len);
putc('\n', stderr);
} else {
/* The table definition was corrupt if there
is no index */
if (dict_table_get_first_index(table)) {
dict_update_statistics_low(table, TRUE);
}
dict_table_print_low(table);
}
mtr_start(&mtr);
btr_pcur_restore_position(BTR_SEARCH_LEAF, &pcur, &mtr);
}
goto loop;
}
/************************************************************************
In a crash recovery we already have all the tablespace objects created.
This function compares the space id information in the InnoDB data dictionary
to what we already read with fil_load_single_table_tablespaces().
In a normal startup, we create the tablespace objects for every table in
InnoDB's data dictionary, if the corresponding .ibd file exists.
We also scan the biggest space id, and store it to fil_system. */
void
dict_check_tablespaces_and_store_max_id(
/*====================================*/
ibool in_crash_recovery) /* in: are we doing a crash recovery */
{
dict_table_t* sys_tables;
dict_index_t* sys_index;
btr_pcur_t pcur;
rec_t* rec;
byte* field;
ulint len;
ulint space_id;
ulint max_space_id = 0;
mtr_t mtr;
mutex_enter(&(dict_sys->mutex));
mtr_start(&mtr);
sys_tables = dict_table_get_low("SYS_TABLES");
sys_index = UT_LIST_GET_FIRST(sys_tables->indexes);
ut_a(!dict_table_is_comp(sys_tables));
btr_pcur_open_at_index_side(TRUE, sys_index, BTR_SEARCH_LEAF, &pcur,
TRUE, &mtr);
loop:
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) {
/* end of index */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
/* We must make the tablespace cache aware of the biggest
known space id */
/* printf("Biggest space id in data dictionary %lu\n",
max_space_id); */
fil_set_max_space_id_if_bigger(max_space_id);
mutex_exit(&(dict_sys->mutex));
return;
}
field = rec_get_nth_field_old(rec, 0, &len);
if (!rec_get_deleted_flag(rec, 0)) {
/* We found one */
char* name = mem_strdupl((char*) field, len);
field = rec_get_nth_field_old(rec, 9, &len);
ut_a(len == 4);
space_id = mach_read_from_4(field);
btr_pcur_store_position(&pcur, &mtr);
mtr_commit(&mtr);
if (space_id != 0 && in_crash_recovery) {
/* Check that the tablespace (the .ibd file) really
exists; print a warning to the .err log if not */
fil_space_for_table_exists_in_mem(space_id, name,
FALSE, TRUE, TRUE);
}
if (space_id != 0 && !in_crash_recovery) {
/* It is a normal database startup: create the space
object and check that the .ibd file exists. */
fil_open_single_table_tablespace(FALSE, space_id,
name);
}
mem_free(name);
if (space_id > max_space_id) {
max_space_id = space_id;
}
mtr_start(&mtr);
btr_pcur_restore_position(BTR_SEARCH_LEAF, &pcur, &mtr);
}
goto loop;
}
/************************************************************************
Loads definitions for table columns. */
static
void
dict_load_columns(
/*==============*/
dict_table_t* table, /* in: table */
mem_heap_t* heap) /* in: memory heap for temporary storage */
{
dict_table_t* sys_columns;
dict_index_t* sys_index;
btr_pcur_t pcur;
dtuple_t* tuple;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
byte* buf;
char* name;
ulint mtype;
ulint prtype;
ulint col_len;
ulint prec;
ulint i;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
mtr_start(&mtr);
sys_columns = dict_table_get_low("SYS_COLUMNS");
sys_index = UT_LIST_GET_FIRST(sys_columns->indexes);
ut_a(!dict_table_is_comp(sys_columns));
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
buf = mem_heap_alloc(heap, 8);
mach_write_to_8(buf, table->id);
dfield_set_data(dfield, buf, 8);
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
for (i = 0; i < table->n_cols - DATA_N_SYS_COLS; i++) {
rec = btr_pcur_get_rec(&pcur);
ut_a(btr_pcur_is_on_user_rec(&pcur, &mtr));
ut_a(!rec_get_deleted_flag(rec, 0));
field = rec_get_nth_field_old(rec, 0, &len);
ut_ad(len == 8);
ut_a(ut_dulint_cmp(table->id, mach_read_from_8(field)) == 0);
field = rec_get_nth_field_old(rec, 1, &len);
ut_ad(len == 4);
ut_a(i == mach_read_from_4(field));
ut_a(0 == ut_strcmp("NAME",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 4))->name));
field = rec_get_nth_field_old(rec, 4, &len);
name = mem_heap_strdupl(heap, (char*) field, len);
field = rec_get_nth_field_old(rec, 5, &len);
mtype = mach_read_from_4(field);
field = rec_get_nth_field_old(rec, 6, &len);
prtype = mach_read_from_4(field);
if (dtype_get_charset_coll(prtype) == 0
&& dtype_is_string_type(mtype)) {
/* The table was created with < 4.1.2. */
if (dtype_is_binary_string_type(mtype, prtype)) {
/* Use the binary collation for
string columns of binary type. */
prtype = dtype_form_prtype(prtype,
DATA_MYSQL_BINARY_CHARSET_COLL);
} else {
/* Use the default charset for
other than binary columns. */
prtype = dtype_form_prtype(prtype,
data_mysql_default_charset_coll);
}
}
field = rec_get_nth_field_old(rec, 7, &len);
col_len = mach_read_from_4(field);
ut_a(0 == ut_strcmp("PREC",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 8))->name));
field = rec_get_nth_field_old(rec, 8, &len);
prec = mach_read_from_4(field);
dict_mem_table_add_col(table, name, mtype, prtype, col_len,
prec);
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
}
/************************************************************************
Report that an index field or index for a table has been delete marked. */
static
void
dict_load_report_deleted_index(
/*===========================*/
const char* name, /* in: table name */
ulint field) /* in: index field, or ULINT_UNDEFINED */
{
fprintf(stderr, "InnoDB: Error: data dictionary entry"
" for table %s is corrupt!\n", name);
if (field != ULINT_UNDEFINED) {
fprintf(stderr,
"InnoDB: Index field %lu is delete marked.\n", field);
} else {
fputs("InnoDB: An index is delete marked.\n", stderr);
}
}
/************************************************************************
Loads definitions for index fields. */
static
void
dict_load_fields(
/*=============*/
dict_table_t* table, /* in: table */
dict_index_t* index, /* in: index whose fields to load */
mem_heap_t* heap) /* in: memory heap for temporary storage */
{
dict_table_t* sys_fields;
dict_index_t* sys_index;
btr_pcur_t pcur;
dtuple_t* tuple;
dfield_t* dfield;
ulint pos_and_prefix_len;
ulint prefix_len;
rec_t* rec;
byte* field;
ulint len;
byte* buf;
ulint i;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
UT_NOT_USED(table);
mtr_start(&mtr);
sys_fields = dict_table_get_low("SYS_FIELDS");
sys_index = UT_LIST_GET_FIRST(sys_fields->indexes);
ut_a(!dict_table_is_comp(sys_fields));
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
buf = mem_heap_alloc(heap, 8);
mach_write_to_8(buf, index->id);
dfield_set_data(dfield, buf, 8);
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
for (i = 0; i < index->n_fields; i++) {
rec = btr_pcur_get_rec(&pcur);
ut_a(btr_pcur_is_on_user_rec(&pcur, &mtr));
if (rec_get_deleted_flag(rec, 0)) {
dict_load_report_deleted_index(table->name, i);
}
field = rec_get_nth_field_old(rec, 0, &len);
ut_ad(len == 8);
ut_a(ut_memcmp(buf, field, len) == 0);
field = rec_get_nth_field_old(rec, 1, &len);
ut_a(len == 4);
/* The next field stores the field position in the index
and a possible column prefix length if the index field
does not contain the whole column. The storage format is
like this: if there is at least one prefix field in the index,
then the HIGH 2 bytes contain the field number (== i) and the
low 2 bytes the prefix length for the field. Otherwise the
field number (== i) is contained in the 2 LOW bytes. */
pos_and_prefix_len = mach_read_from_4(field);
ut_a((pos_and_prefix_len & 0xFFFFUL) == i
|| (pos_and_prefix_len & 0xFFFF0000UL) == (i << 16));
if ((i == 0 && pos_and_prefix_len > 0)
|| (pos_and_prefix_len & 0xFFFF0000UL) > 0) {
prefix_len = pos_and_prefix_len & 0xFFFFUL;
} else {
prefix_len = 0;
}
ut_a(0 == ut_strcmp("COL_NAME",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 4))->name));
field = rec_get_nth_field_old(rec, 4, &len);
dict_mem_index_add_field(index,
mem_heap_strdupl(heap, (char*) field, len), prefix_len);
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
}
/************************************************************************
Loads definitions for table indexes. Adds them to the data dictionary
cache. */
static
ibool
dict_load_indexes(
/*==============*/
/* out: TRUE if ok, FALSE if corruption
of dictionary table */
dict_table_t* table, /* in: table */
mem_heap_t* heap) /* in: memory heap for temporary storage */
{
dict_table_t* sys_indexes;
dict_index_t* sys_index;
dict_index_t* index;
btr_pcur_t pcur;
dtuple_t* tuple;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
ulint name_len;
char* name_buf;
ulint type;
ulint space;
ulint page_no;
ulint n_fields;
byte* buf;
ibool is_sys_table;
dulint id;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
if ((ut_dulint_get_high(table->id) == 0)
&& (ut_dulint_get_low(table->id) < DICT_HDR_FIRST_ID)) {
is_sys_table = TRUE;
} else {
is_sys_table = FALSE;
}
mtr_start(&mtr);
sys_indexes = dict_table_get_low("SYS_INDEXES");
sys_index = UT_LIST_GET_FIRST(sys_indexes->indexes);
ut_a(!dict_table_is_comp(sys_indexes));
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
buf = mem_heap_alloc(heap, 8);
mach_write_to_8(buf, table->id);
dfield_set_data(dfield, buf, 8);
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
for (;;) {
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) {
break;
}
rec = btr_pcur_get_rec(&pcur);
field = rec_get_nth_field_old(rec, 0, &len);
ut_ad(len == 8);
if (ut_memcmp(buf, field, len) != 0) {
break;
}
if (rec_get_deleted_flag(rec, dict_table_is_comp(table))) {
dict_load_report_deleted_index(table->name,
ULINT_UNDEFINED);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
return(FALSE);
}
field = rec_get_nth_field_old(rec, 1, &len);
ut_ad(len == 8);
id = mach_read_from_8(field);
ut_a(0 == ut_strcmp("NAME",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 4))->name));
field = rec_get_nth_field_old(rec, 4, &name_len);
name_buf = mem_heap_strdupl(heap, (char*) field, name_len);
field = rec_get_nth_field_old(rec, 5, &len);
n_fields = mach_read_from_4(field);
field = rec_get_nth_field_old(rec, 6, &len);
type = mach_read_from_4(field);
field = rec_get_nth_field_old(rec, 7, &len);
space = mach_read_from_4(field);
ut_a(0 == ut_strcmp("PAGE_NO",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 8))->name));
field = rec_get_nth_field_old(rec, 8, &len);
page_no = mach_read_from_4(field);
if (page_no == FIL_NULL) {
fprintf(stderr,
"InnoDB: Error: trying to load index %s for table %s\n"
"InnoDB: but the index tree has been freed!\n",
name_buf, table->name);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
return(FALSE);
}
if ((type & DICT_CLUSTERED) == 0
&& NULL == dict_table_get_first_index(table)) {
fprintf(stderr,
"InnoDB: Error: trying to load index %s for table %s\n"
"InnoDB: but the first index is not clustered!\n",
name_buf, table->name);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
return(FALSE);
}
if (is_sys_table
&& ((type & DICT_CLUSTERED)
|| ((table == dict_sys->sys_tables)
&& (name_len == (sizeof "ID_IND") - 1)
&& (0 == ut_memcmp(name_buf, "ID_IND",
name_len))))) {
/* The index was created in memory already at booting
of the database server */
} else {
index = dict_mem_index_create(table->name, name_buf,
space, type, n_fields);
index->id = id;
dict_load_fields(table, index, heap);
dict_index_add_to_cache(table, index, page_no);
}
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
return(TRUE);
}
/************************************************************************
Loads a table definition and also all its index definitions, and also
the cluster definition if the table is a member in a cluster. Also loads
all foreign key constraints where the foreign key is in the table or where
a foreign key references columns in this table. Adds all these to the data
dictionary cache. */
dict_table_t*
dict_load_table(
/*============*/
/* out: table, NULL if does not exist;
if the table is stored in an .ibd file,
but the file does not exist,
then we set the ibd_file_missing flag TRUE
in the table object we return */
const char* name) /* in: table name in the
databasename/tablename format */
{
ibool ibd_file_missing = FALSE;
dict_table_t* table;
dict_table_t* sys_tables;
btr_pcur_t pcur;
dict_index_t* sys_index;
dtuple_t* tuple;
mem_heap_t* heap;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
ulint space;
ulint n_cols;
ulint flags;
ulint err;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
heap = mem_heap_create(1000);
mtr_start(&mtr);
sys_tables = dict_table_get_low("SYS_TABLES");
sys_index = UT_LIST_GET_FIRST(sys_tables->indexes);
ut_a(!dict_table_is_comp(sys_tables));
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, name, ut_strlen(name));
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)
|| rec_get_deleted_flag(rec, 0)) {
/* Not found */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
field = rec_get_nth_field_old(rec, 0, &len);
/* Check if the table name in record is the searched one */
if (len != ut_strlen(name) || ut_memcmp(name, field, len) != 0) {
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
ut_a(0 == ut_strcmp("SPACE",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 9))->name));
field = rec_get_nth_field_old(rec, 9, &len);
space = mach_read_from_4(field);
/* Check if the tablespace exists and has the right name */
if (space != 0) {
if (fil_space_for_table_exists_in_mem(space, name, FALSE,
FALSE, FALSE)) {
/* Ok; (if we did a crash recovery then the tablespace
can already be in the memory cache) */
} else {
/* In >= 4.1.9, InnoDB scans the data dictionary also
at a normal mysqld startup. It is an error if the
space object does not exist in memory. */
ut_print_timestamp(stderr);
fprintf(stderr,
" InnoDB: error: space object of table %s,\n"
"InnoDB: space id %lu did not exist in memory. Retrying an open.\n",
name, (ulong)space);
/* Try to open the tablespace */
if (!fil_open_single_table_tablespace(TRUE,
space, name)) {
/* We failed to find a sensible tablespace
file */
ibd_file_missing = TRUE;
}
}
}
ut_a(0 == ut_strcmp("N_COLS",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 4))->name));
field = rec_get_nth_field_old(rec, 4, &len);
n_cols = mach_read_from_4(field);
flags = 0;
/* The high-order bit of N_COLS is the "compact format" flag. */
if (n_cols & 0x80000000UL) {
flags |= DICT_TF_COMPACT;
}
table = dict_mem_table_create(name, space, n_cols & ~0x80000000UL,
flags);
table->ibd_file_missing = ibd_file_missing;
ut_a(0 == ut_strcmp("ID",
dict_field_get_col(
dict_index_get_nth_field(sys_index, 3))->name));
field = rec_get_nth_field_old(rec, 3, &len);
table->id = mach_read_from_8(field);
field = rec_get_nth_field_old(rec, 5, &len);
table->type = mach_read_from_4(field);
if (table->type == DICT_TABLE_CLUSTER_MEMBER) {
ut_error;
#if 0 /* clustered tables have not been implemented yet */
field = rec_get_nth_field_old(rec, 6, &len);
table->mix_id = mach_read_from_8(field);
field = rec_get_nth_field_old(rec, 8, &len);
table->cluster_name = mem_heap_strdupl(heap, (char*) field, len);
#endif
}
if ((table->type == DICT_TABLE_CLUSTER)
|| (table->type == DICT_TABLE_CLUSTER_MEMBER)) {
field = rec_get_nth_field_old(rec, 7, &len);
ut_a(len == 4);
table->mix_len = mach_read_from_4(field);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
if (table->type == DICT_TABLE_CLUSTER_MEMBER) {
/* Load the cluster table definition if not yet in
memory cache */
dict_table_get_low(table->cluster_name);
}
dict_load_columns(table, heap);
dict_table_add_to_cache(table);
dict_load_indexes(table, heap);
err = dict_load_foreigns(table->name, TRUE);
/*
if (err != DB_SUCCESS) {
mutex_enter(&dict_foreign_err_mutex);
ut_print_timestamp(stderr);
fprintf(stderr,
" InnoDB: Error: could not make a foreign key definition to match\n"
"InnoDB: the foreign key table or the referenced table!\n"
"InnoDB: The data dictionary of InnoDB is corrupt. You may need to drop\n"
"InnoDB: and recreate the foreign key table or the referenced table.\n"
"InnoDB: Submit a detailed bug report to http://bugs.mysql.com\n"
"InnoDB: Latest foreign key error printout:\n%s\n", dict_foreign_err_buf);
mutex_exit(&dict_foreign_err_mutex);
}
*/
mem_heap_free(heap);
return(table);
}
/***************************************************************************
Loads a table object based on the table id. */
dict_table_t*
dict_load_table_on_id(
/*==================*/
/* out: table; NULL if table does not exist */
dulint table_id) /* in: table id */
{
byte id_buf[8];
btr_pcur_t pcur;
mem_heap_t* heap;
dtuple_t* tuple;
dfield_t* dfield;
dict_index_t* sys_table_ids;
dict_table_t* sys_tables;
rec_t* rec;
byte* field;
ulint len;
dict_table_t* table;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
/* NOTE that the operation of this function is protected by
the dictionary mutex, and therefore no deadlocks can occur
with other dictionary operations. */
mtr_start(&mtr);
/*---------------------------------------------------*/
/* Get the secondary index based on ID for table SYS_TABLES */
sys_tables = dict_sys->sys_tables;
sys_table_ids = dict_table_get_next_index(
dict_table_get_first_index(sys_tables));
ut_a(!dict_table_is_comp(sys_tables));
heap = mem_heap_create(256);
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
/* Write the table id in byte format to id_buf */
mach_write_to_8(id_buf, table_id);
dfield_set_data(dfield, id_buf, 8);
dict_index_copy_types(tuple, sys_table_ids, 1);
btr_pcur_open_on_user_rec(sys_table_ids, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)
|| rec_get_deleted_flag(rec, 0)) {
/* Not found */
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
/*---------------------------------------------------*/
/* Now we have the record in the secondary index containing the
table ID and NAME */
rec = btr_pcur_get_rec(&pcur);
field = rec_get_nth_field_old(rec, 0, &len);
ut_ad(len == 8);
/* Check if the table id in record is the one searched for */
if (ut_dulint_cmp(table_id, mach_read_from_8(field)) != 0) {
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(NULL);
}
/* Now we get the table name from the record */
field = rec_get_nth_field_old(rec, 1, &len);
/* Load the table definition to memory */
table = dict_load_table(mem_heap_strdupl(heap, (char*) field, len));
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
return(table);
}
/************************************************************************
This function is called when the database is booted. Loads system table
index definitions except for the clustered index which is added to the
dictionary cache at booting before calling this function. */
void
dict_load_sys_table(
/*================*/
dict_table_t* table) /* in: system table */
{
mem_heap_t* heap;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
heap = mem_heap_create(1000);
dict_load_indexes(table, heap);
mem_heap_free(heap);
}
/************************************************************************
Loads foreign key constraint col names (also for the referenced table). */
static
void
dict_load_foreign_cols(
/*===================*/
const char* id, /* in: foreign constraint id as a null-
terminated string */
dict_foreign_t* foreign)/* in: foreign constraint object */
{
dict_table_t* sys_foreign_cols;
dict_index_t* sys_index;
btr_pcur_t pcur;
dtuple_t* tuple;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
ulint i;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
foreign->foreign_col_names = mem_heap_alloc(foreign->heap,
foreign->n_fields * sizeof(void*));
foreign->referenced_col_names = mem_heap_alloc(foreign->heap,
foreign->n_fields * sizeof(void*));
mtr_start(&mtr);
sys_foreign_cols = dict_table_get_low("SYS_FOREIGN_COLS");
sys_index = UT_LIST_GET_FIRST(sys_foreign_cols->indexes);
ut_a(!dict_table_is_comp(sys_foreign_cols));
tuple = dtuple_create(foreign->heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, id, ut_strlen(id));
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
for (i = 0; i < foreign->n_fields; i++) {
rec = btr_pcur_get_rec(&pcur);
ut_a(btr_pcur_is_on_user_rec(&pcur, &mtr));
ut_a(!rec_get_deleted_flag(rec, 0));
field = rec_get_nth_field_old(rec, 0, &len);
ut_a(len == ut_strlen(id));
ut_a(ut_memcmp(id, field, len) == 0);
field = rec_get_nth_field_old(rec, 1, &len);
ut_a(len == 4);
ut_a(i == mach_read_from_4(field));
field = rec_get_nth_field_old(rec, 4, &len);
foreign->foreign_col_names[i] =
mem_heap_strdupl(foreign->heap, (char*) field, len);
field = rec_get_nth_field_old(rec, 5, &len);
foreign->referenced_col_names[i] =
mem_heap_strdupl(foreign->heap, (char*) field, len);
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
}
/***************************************************************************
Loads a foreign key constraint to the dictionary cache. */
static
ulint
dict_load_foreign(
/*==============*/
/* out: DB_SUCCESS or error code */
const char* id, /* in: foreign constraint id as a
null-terminated string */
ibool check_charsets)/* in: TRUE=check charset compatibility */
{
dict_foreign_t* foreign;
dict_table_t* sys_foreign;
btr_pcur_t pcur;
dict_index_t* sys_index;
dtuple_t* tuple;
mem_heap_t* heap2;
dfield_t* dfield;
rec_t* rec;
byte* field;
ulint len;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
heap2 = mem_heap_create(1000);
mtr_start(&mtr);
sys_foreign = dict_table_get_low("SYS_FOREIGN");
sys_index = UT_LIST_GET_FIRST(sys_foreign->indexes);
ut_a(!dict_table_is_comp(sys_foreign));
tuple = dtuple_create(heap2, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, id, ut_strlen(id));
dict_index_copy_types(tuple, sys_index, 1);
btr_pcur_open_on_user_rec(sys_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)
|| rec_get_deleted_flag(rec, 0)) {
/* Not found */
fprintf(stderr,
"InnoDB: Error A: cannot load foreign constraint %s\n",
id);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap2);
return(DB_ERROR);
}
field = rec_get_nth_field_old(rec, 0, &len);
/* Check if the id in record is the searched one */
if (len != ut_strlen(id) || ut_memcmp(id, field, len) != 0) {
fprintf(stderr,
"InnoDB: Error B: cannot load foreign constraint %s\n",
id);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap2);
return(DB_ERROR);
}
/* Read the table names and the number of columns associated
with the constraint */
mem_heap_free(heap2);
foreign = dict_mem_foreign_create();
foreign->n_fields =
mach_read_from_4(rec_get_nth_field_old(rec, 5, &len));
ut_a(len == 4);
/* We store the type to the bits 24-31 of n_fields */
foreign->type = foreign->n_fields >> 24;
foreign->n_fields = foreign->n_fields & 0xFFFFFFUL;
foreign->id = mem_heap_strdup(foreign->heap, id);
field = rec_get_nth_field_old(rec, 3, &len);
foreign->foreign_table_name =
mem_heap_strdupl(foreign->heap, (char*) field, len);
field = rec_get_nth_field_old(rec, 4, &len);
foreign->referenced_table_name =
mem_heap_strdupl(foreign->heap, (char*) field, len);
btr_pcur_close(&pcur);
mtr_commit(&mtr);
dict_load_foreign_cols(id, foreign);
/* If the foreign table is not yet in the dictionary cache, we
have to load it so that we are able to make type comparisons
in the next function call. */
dict_table_get_low(foreign->foreign_table_name);
/* Note that there may already be a foreign constraint object in
the dictionary cache for this constraint: then the following
call only sets the pointers in it to point to the appropriate table
and index objects and frees the newly created object foreign.
Adding to the cache should always succeed since we are not creating
a new foreign key constraint but loading one from the data
dictionary. */
return(dict_foreign_add_to_cache(foreign, check_charsets));
}
/***************************************************************************
Loads foreign key constraints where the table is either the foreign key
holder or where the table is referenced by a foreign key. Adds these
constraints to the data dictionary. Note that we know that the dictionary
cache already contains all constraints where the other relevant table is
already in the dictionary cache. */
ulint
dict_load_foreigns(
/*===============*/
/* out: DB_SUCCESS or error code */
const char* table_name, /* in: table name */
ibool check_charsets) /* in: TRUE=check charset
compatibility */
{
btr_pcur_t pcur;
mem_heap_t* heap;
dtuple_t* tuple;
dfield_t* dfield;
dict_index_t* sec_index;
dict_table_t* sys_foreign;
rec_t* rec;
byte* field;
ulint len;
char* id ;
ulint err;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&(dict_sys->mutex)));
#endif /* UNIV_SYNC_DEBUG */
sys_foreign = dict_table_get_low("SYS_FOREIGN");
if (sys_foreign == NULL) {
/* No foreign keys defined yet in this database */
fprintf(stderr,
"InnoDB: Error: no foreign key system tables in the database\n");
return(DB_ERROR);
}
ut_a(!dict_table_is_comp(sys_foreign));
mtr_start(&mtr);
/* Get the secondary index based on FOR_NAME from table
SYS_FOREIGN */
sec_index = dict_table_get_next_index(
dict_table_get_first_index(sys_foreign));
start_load:
heap = mem_heap_create(256);
tuple = dtuple_create(heap, 1);
dfield = dtuple_get_nth_field(tuple, 0);
dfield_set_data(dfield, table_name, ut_strlen(table_name));
dict_index_copy_types(tuple, sec_index, 1);
btr_pcur_open_on_user_rec(sec_index, tuple, PAGE_CUR_GE,
BTR_SEARCH_LEAF, &pcur, &mtr);
loop:
rec = btr_pcur_get_rec(&pcur);
if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) {
/* End of index */
goto load_next_index;
}
/* Now we have the record in the secondary index containing a table
name and a foreign constraint ID */
rec = btr_pcur_get_rec(&pcur);
field = rec_get_nth_field_old(rec, 0, &len);
/* Check if the table name in the record is the one searched for; the
following call does the comparison in the latin1_swedish_ci
charset-collation, in a case-insensitive way. */
if (0 != cmp_data_data(dfield_get_type(dfield),
dfield_get_data(dfield), dfield_get_len(dfield),
field, len)) {
goto load_next_index;
}
/* Since table names in SYS_FOREIGN are stored in a case-insensitive
order, we have to check that the table name matches also in a binary
string comparison. On Unix, MySQL allows table names that only differ
in character case. */
if (0 != ut_memcmp(field, table_name, len)) {
goto next_rec;
}
if (rec_get_deleted_flag(rec, 0)) {
goto next_rec;
}
/* Now we get a foreign key constraint id */
field = rec_get_nth_field_old(rec, 1, &len);
id = mem_heap_strdupl(heap, (char*) field, len);
btr_pcur_store_position(&pcur, &mtr);
mtr_commit(&mtr);
/* Load the foreign constraint definition to the dictionary cache */
err = dict_load_foreign(id, check_charsets);
if (err != DB_SUCCESS) {
btr_pcur_close(&pcur);
mem_heap_free(heap);
return(err);
}
mtr_start(&mtr);
btr_pcur_restore_position(BTR_SEARCH_LEAF, &pcur, &mtr);
next_rec:
btr_pcur_move_to_next_user_rec(&pcur, &mtr);
goto loop;
load_next_index:
btr_pcur_close(&pcur);
mtr_commit(&mtr);
mem_heap_free(heap);
sec_index = dict_table_get_next_index(sec_index);
if (sec_index != NULL) {
mtr_start(&mtr);
goto start_load;
}
return(DB_SUCCESS);
}
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