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Commit 6b59c3ae authored by marko's avatar marko
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branches/5.1: In innobase_initialize_autoinc(), do not attempt to read 

the maximum auto-increment value from the table if
innodb_force_recovery is set to at least 4, so that writes are
disabled. (Bug #46193)

innobase_get_int_col_max_value(): Move the function definition before
ha_innobase::innobase_initialize_autoinc(), because that function now
calls this function.

ha_innobase::innobase_initialize_autoinc(): Change the return type to
void.  Do not attempt to read the maximum auto-increment value from
the table if innodb_force_recovery is set to at least 4.  Issue
ER_AUTOINC_READ_FAILED to the client when the auto-increment value
cannot be read.

rb://144 by Sunny, revised by Marko
parent 8bf81e62
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Showing with 131 additions and 103 deletions
handler/ha_innodb.cc
View file @ 6b59c3ae
......@@ -2575,58 +2575,151 @@ normalize_table_name(
#endif
}
/************************************************************************
Get the upper limit of the MySQL integral and floating-point type. */
static
ulonglong
innobase_get_int_col_max_value(
/*===========================*/
/* out: maximum allowed value for the field */
const Field* field) /* in: MySQL field */
{
ulonglong max_value = 0;
switch(field->key_type()) {
/* TINY */
case HA_KEYTYPE_BINARY:
max_value = 0xFFULL;
break;
case HA_KEYTYPE_INT8:
max_value = 0x7FULL;
break;
/* SHORT */
case HA_KEYTYPE_USHORT_INT:
max_value = 0xFFFFULL;
break;
case HA_KEYTYPE_SHORT_INT:
max_value = 0x7FFFULL;
break;
/* MEDIUM */
case HA_KEYTYPE_UINT24:
max_value = 0xFFFFFFULL;
break;
case HA_KEYTYPE_INT24:
max_value = 0x7FFFFFULL;
break;
/* LONG */
case HA_KEYTYPE_ULONG_INT:
max_value = 0xFFFFFFFFULL;
break;
case HA_KEYTYPE_LONG_INT:
max_value = 0x7FFFFFFFULL;
break;
/* BIG */
case HA_KEYTYPE_ULONGLONG:
max_value = 0xFFFFFFFFFFFFFFFFULL;
break;
case HA_KEYTYPE_LONGLONG:
max_value = 0x7FFFFFFFFFFFFFFFULL;
break;
case HA_KEYTYPE_FLOAT:
/* We use the maximum as per IEEE754-2008 standard, 2^24 */
max_value = 0x1000000ULL;
break;
case HA_KEYTYPE_DOUBLE:
/* We use the maximum as per IEEE754-2008 standard, 2^53 */
max_value = 0x20000000000000ULL;
break;
default:
ut_error;
}
return(max_value);
}
/************************************************************************
Set the autoinc column max value. This should only be called once from
ha_innobase::open(). Therefore there's no need for a covering lock. */
ulong
void
ha_innobase::innobase_initialize_autoinc()
/*======================================*/
{
dict_index_t* index;
ulonglong auto_inc;
const char* col_name;
ulint error = DB_SUCCESS;
dict_table_t* innodb_table = prebuilt->table;
const Field* field = table->found_next_number_field;
col_name = table->found_next_number_field->field_name;
index = innobase_get_index(table->s->next_number_index);
/* Execute SELECT MAX(col_name) FROM TABLE; */
error = row_search_max_autoinc(index, col_name, &auto_inc);
if (error == DB_SUCCESS) {
if (field != NULL) {
auto_inc = innobase_get_int_col_max_value(field);
} else {
/* We have no idea what's been passed in to us as the
autoinc column. We set it to the MAX_INT of our table
autoinc type. */
auto_inc = 0xFFFFFFFFFFFFFFFFULL;
/* At the this stage we dont' know the increment
or the offset, so use default inrement of 1. */
++auto_inc;
ut_print_timestamp(stderr);
fprintf(stderr, " InnoDB: Unable to determine the AUTOINC "
"column name\n");
}
dict_table_autoinc_initialize(innodb_table, auto_inc);
if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
/* If the recovery level is set so high that writes
are disabled we force the AUTOINC counter to the MAX
value effectively disabling writes to the table.
Secondly, we avoid reading the table in case the read
results in failure due to a corrupted table/index.
We will not return an error to the client, so that the
tables can be dumped with minimal hassle. If an error
were returned in this case, the first attempt to read
the table would fail and subsequent SELECTs would succeed. */
} else if (field == NULL) {
my_error(ER_AUTOINC_READ_FAILED, MYF(0));
} else {
dict_index_t* index;
const char* col_name;
ulonglong read_auto_inc;
ulint err;
} else if (error == DB_RECORD_NOT_FOUND) {
ut_print_timestamp(stderr);
fprintf(stderr, " InnoDB: MySQL and InnoDB data "
"dictionaries are out of sync.\n"
"InnoDB: Unable to find the AUTOINC column %s in the "
"InnoDB table %s.\n"
"InnoDB: We set the next AUTOINC column value to the "
"maximum possible value,\n"
"InnoDB: in effect disabling the AUTOINC next value "
"generation.\n"
"InnoDB: You can either set the next AUTOINC value "
"explicitly using ALTER TABLE\n"
"InnoDB: or fix the data dictionary by recreating "
"the table.\n",
col_name, index->table->name);
update_thd(ha_thd());
col_name = field->field_name;
index = innobase_get_index(table->s->next_number_index);
auto_inc = 0xFFFFFFFFFFFFFFFFULL;
/* Execute SELECT MAX(col_name) FROM TABLE; */
err = row_search_max_autoinc(index, col_name, &read_auto_inc);
dict_table_autoinc_initialize(innodb_table, auto_inc);
switch (err) {
case DB_SUCCESS:
/* At the this stage we do not know the increment
or the offset, so use a default increment of 1. */
auto_inc = read_auto_inc + 1;
break;
error = DB_SUCCESS;
} /* else other errors are still fatal */
case DB_RECORD_NOT_FOUND:
ut_print_timestamp(stderr);
fprintf(stderr, " InnoDB: MySQL and InnoDB data "
"dictionaries are out of sync.\n"
"InnoDB: Unable to find the AUTOINC column "
"%s in the InnoDB table %s.\n"
"InnoDB: We set the next AUTOINC column "
"value to the maximum possible value,\n"
"InnoDB: in effect disabling the AUTOINC "
"next value generation.\n"
"InnoDB: You can either set the next "
"AUTOINC value explicitly using ALTER TABLE\n"
"InnoDB: or fix the data dictionary by "
"recreating the table.\n",
col_name, index->table->name);
my_error(ER_AUTOINC_READ_FAILED, MYF(0));
break;
default:
/* row_search_max_autoinc() should only return
one of DB_SUCCESS or DB_RECORD_NOT_FOUND. */
ut_error;
}
}
return(ulong(error));
dict_table_autoinc_initialize(prebuilt->table, auto_inc);
}
/*********************************************************************
......@@ -2824,8 +2917,6 @@ ha_innobase::open(
/* Only if the table has an AUTOINC column. */
if (prebuilt->table != NULL && table->found_next_number_field != NULL) {
ulint error;
dict_table_autoinc_lock(prebuilt->table);
/* Since a table can already be "open" in InnoDB's internal
......@@ -2834,8 +2925,7 @@ ha_innobase::open(
autoinc value from a previous MySQL open. */
if (dict_table_autoinc_read(prebuilt->table) == 0) {
error = innobase_initialize_autoinc();
ut_a(error == DB_SUCCESS);
innobase_initialize_autoinc();
}
dict_table_autoinc_unlock(prebuilt->table);
......@@ -3650,68 +3740,6 @@ build_template(
}
}
/************************************************************************
Get the upper limit of the MySQL integral and floating-point type. */
static
ulonglong
innobase_get_int_col_max_value(
/*===========================*/
/* out: maximum allowed value for the field */
const Field* field) /* in: MySQL field */
{
ulonglong max_value = 0;
switch(field->key_type()) {
/* TINY */
case HA_KEYTYPE_BINARY:
max_value = 0xFFULL;
break;
case HA_KEYTYPE_INT8:
max_value = 0x7FULL;
break;
/* SHORT */
case HA_KEYTYPE_USHORT_INT:
max_value = 0xFFFFULL;
break;
case HA_KEYTYPE_SHORT_INT:
max_value = 0x7FFFULL;
break;
/* MEDIUM */
case HA_KEYTYPE_UINT24:
max_value = 0xFFFFFFULL;
break;
case HA_KEYTYPE_INT24:
max_value = 0x7FFFFFULL;
break;
/* LONG */
case HA_KEYTYPE_ULONG_INT:
max_value = 0xFFFFFFFFULL;
break;
case HA_KEYTYPE_LONG_INT:
max_value = 0x7FFFFFFFULL;
break;
/* BIG */
case HA_KEYTYPE_ULONGLONG:
max_value = 0xFFFFFFFFFFFFFFFFULL;
break;
case HA_KEYTYPE_LONGLONG:
max_value = 0x7FFFFFFFFFFFFFFFULL;
break;
case HA_KEYTYPE_FLOAT:
/* We use the maximum as per IEEE754-2008 standard, 2^24 */
max_value = 0x1000000ULL;
break;
case HA_KEYTYPE_DOUBLE:
/* We use the maximum as per IEEE754-2008 standard, 2^53 */
max_value = 0x20000000000000ULL;
break;
default:
ut_error;
}
return(max_value);
}
/************************************************************************
This special handling is really to overcome the limitations of MySQL's
binlogging. We need to eliminate the non-determinism that will arise in
......
handler/ha_innodb.h
View file @ 6b59c3ae
......@@ -78,7 +78,7 @@ class ha_innobase: public handler
ulong innobase_reset_autoinc(ulonglong auto_inc);
ulong innobase_get_autoinc(ulonglong* value);
ulong innobase_update_autoinc(ulonglong auto_inc);
ulong innobase_initialize_autoinc();
void innobase_initialize_autoinc();
dict_index_t* innobase_get_index(uint keynr);
/* Init values for the class: */
......
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