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sql_type.cc
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/*
Copyright (c) 2015, 2022, MariaDB
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 St, Fifth Floor, Boston, MA 02110-1335 USA */
#include "mariadb.h"
#include "sql_type.h"
#include "sql_type_geom.h"
#include "sql_type_vector.h"
#include "sql_const.h"
#include "sql_class.h"
#include "sql_time.h"
#include "sql_string.h"
#include "item.h"
#include "log.h"
#include "tztime.h"
#include <mysql/plugin_data_type.h>
const DTCollation &DTCollation_numeric::singleton()
{
static const DTCollation_numeric tmp;
return tmp;
}
bool
DTCollation::merge_charset_and_collation(Sql_used *used,
const Charset_collation_map_st &map,
CHARSET_INFO *cs,
const Lex_extended_collation_st &cl,
my_repertoire_t repertoire)
{
Lex_exact_charset_opt_extended_collate cscl(cs, true);
if (cscl.merge_collation_override(used, map, cl))
return true;
set(cscl.collation().charset_info(), DERIVATION_EXPLICIT, repertoire);
return false;
}
bool DTCollation::merge_collation(Sql_used *used,
const Charset_collation_map_st &map,
const Lex_extended_collation_st &cl,
my_repertoire_t repertoire,
bool allow_ignorable_with_context_collation)
{
if (derivation != DERIVATION_IGNORABLE)
{
// A known character set + an extended collation
return merge_charset_and_collation(used, map, collation, cl, repertoire);
}
if (cl.type() == Lex_extended_collation::TYPE_EXACT)
{
/*
An unknown character set + an exact collation.
Just use this exact collation.
Examples:
- Expressions derived from an explicit NULL:
SELECT NULL COLLATE utf8mb4_general_ci;
SELECT CONCAT(NULL) COLLATE utf8mb4_general_ci;
Any collation is applicable to an explicit NULL.
- Expressions with PS parameters (at PREPARE time, not bound yet)
SELECT ? COLLATE utf8mb4_general_ci;
SELECT CONCAT(?) COLLATE utf8mb4_general_ci;
The collation will be checked for applicability to the
character set of the actual bound parameter at the EXECUTE time.
We're now in PREPARE: let's assume it will be applicable.
*/
set(cl.charset_info(), DERIVATION_EXPLICIT, repertoire);
return false;
}
// An unknown character set + a contextually typed collation
if (allow_ignorable_with_context_collation)
{
/*
Expressions with non-bound PS parameters, PREPARE time.
SELECT ? COLLATE uca1400_ai_ci;
SELECT CONCAT(?) COLLATE uca1400_ai_ci;
There is a chance the character set of the actual bound parameter
will be known at the EXECUTE time (unless an explicit NULL is bound).
For now let's use utf8mb4 to resolve collations like uca1400_ai_ci.
The real character set of the actual bound parameter expression will be
later used to resolve the collation again, during the EXECUTE time.
*/
return merge_charset_and_collation(used, map,
&my_charset_utf8mb4_general_ci,
cl, repertoire);
}
/*
Expressions with an unknown character set:
- Either without PS parameters at all:
SELECT NULL COLLATE uca1400_ai_ci;
SELECT CONCAT(NULL) COLLATE uca1400_ai_ci;
- Or with PS parameters bound to NULL at EXECUTE time:
EXECUTE IMMEDIATE
'SELECT ? COLLATE uca1400_ai_ci' USING NULL;
EXECUTE IMMEDIATE
'SELECT CONCAT(?) COLLATE uca1400_ai_ci' USING NULL;
EXECUTE IMMEDIATE
'SELECT ? COLLATE uca1400_ai_ci' USING CONCAT(NULL);
*/
my_error(ER_NOT_ALLOWED_IN_THIS_CONTEXT, MYF(0), "NULL");
return true;
}
Named_type_handler<Type_handler_row> type_handler_row("row");
Named_type_handler<Type_handler_null> type_handler_null("null");
Named_type_handler<Type_handler_bool> type_handler_bool("boolean");
Named_type_handler<Type_handler_tiny> type_handler_stiny("tinyint");
Named_type_handler<Type_handler_short> type_handler_sshort("smallint");
Named_type_handler<Type_handler_long> type_handler_slong("int");
Named_type_handler<Type_handler_long_ge0> type_handler_slong_ge0("int");
Named_type_handler<Type_handler_int24> type_handler_sint24("mediumint");
Named_type_handler<Type_handler_longlong> type_handler_slonglong("bigint");
Named_type_handler<Type_handler_utiny> type_handler_utiny("tinyint unsigned");
Named_type_handler<Type_handler_ushort> type_handler_ushort("smallint unsigned");
Named_type_handler<Type_handler_ulong> type_handler_ulong("int unsigned");
Named_type_handler<Type_handler_uint24> type_handler_uint24("mediumint unsigned");
Named_type_handler<Type_handler_ulonglong> type_handler_ulonglong("bigint unsigned");
Named_type_handler<Type_handler_vers_trx_id> type_handler_vers_trx_id("bigint unsigned");
Named_type_handler<Type_handler_float> type_handler_float("float");
Named_type_handler<Type_handler_double> type_handler_double("double");
Named_type_handler<Type_handler_bit> type_handler_bit("bit");
Named_type_handler<Type_handler_olddecimal> type_handler_olddecimal("decimal");
Named_type_handler<Type_handler_newdecimal> type_handler_newdecimal("decimal");
Named_type_handler<Type_handler_year> type_handler_year("year");
Named_type_handler<Type_handler_year> type_handler_year2("year");
Named_type_handler<Type_handler_time> type_handler_time("time");
Named_type_handler<Type_handler_date> type_handler_date("date");
Named_type_handler<Type_handler_timestamp> type_handler_timestamp("timestamp");
Named_type_handler<Type_handler_timestamp2> type_handler_timestamp2("timestamp");
Named_type_handler<Type_handler_datetime> type_handler_datetime("datetime");
Named_type_handler<Type_handler_time2> type_handler_time2("time");
Named_type_handler<Type_handler_newdate> type_handler_newdate("date");
Named_type_handler<Type_handler_datetime2> type_handler_datetime2("datetime");
Named_type_handler<Type_handler_enum> type_handler_enum("enum");
Named_type_handler<Type_handler_set> type_handler_set("set");
Named_type_handler<Type_handler_string> type_handler_string("char");
Named_type_handler<Type_handler_var_string> type_handler_var_string("varchar");
Named_type_handler<Type_handler_varchar> type_handler_varchar("varchar");
Named_type_handler<Type_handler_hex_hybrid> type_handler_hex_hybrid("hex_hybrid");
Named_type_handler<Type_handler_varchar_compressed> type_handler_varchar_compressed("varchar");
Named_type_handler<Type_handler_tiny_blob> type_handler_tiny_blob("tinyblob");
Named_type_handler<Type_handler_medium_blob> type_handler_medium_blob("mediumblob");
Named_type_handler<Type_handler_long_blob> type_handler_long_blob("longblob");
Named_type_handler<Type_handler_blob> type_handler_blob("blob");
Named_type_handler<Type_handler_blob_compressed> type_handler_blob_compressed("blob");
Type_handler_interval_DDhhmmssff type_handler_interval_DDhhmmssff;
Vers_type_timestamp vers_type_timestamp;
Vers_type_trx vers_type_trx;
/***************************************************************************/
class Type_collection_std: public Type_collection
{
public:
const Type_handler *aggregate_for_result(const Type_handler *a,
const Type_handler *b)
const override
{
return Type_handler::aggregate_for_result_traditional(a, b);
}
const Type_handler *aggregate_for_comparison(const Type_handler *a,
const Type_handler *b)
const override;
const Type_handler *aggregate_for_min_max(const Type_handler *a,
const Type_handler *b)
const override;
const Type_handler *aggregate_for_num_op(const Type_handler *a,
const Type_handler *b)
const override;
};
static Type_collection_std type_collection_std;
const Type_collection *Type_handler::type_collection() const
{
return &type_collection_std;
}
bool Type_handler::is_traditional_scalar_type() const
{
return type_collection() == &type_collection_std;
}
class Type_collection_row: public Type_collection
{
public:
bool init(Type_handler_data *data) override
{
return false;
}
const Type_handler *aggregate_for_result(const Type_handler *a,
const Type_handler *b)
const override
{
return NULL;
}
const Type_handler *aggregate_for_comparison(const Type_handler *a,
const Type_handler *b)
const override
{
DBUG_ASSERT(a == &type_handler_row);
DBUG_ASSERT(b == &type_handler_row);
return &type_handler_row;
}
const Type_handler *aggregate_for_min_max(const Type_handler *a,
const Type_handler *b)
const override
{
return NULL;
}
const Type_handler *aggregate_for_num_op(const Type_handler *a,
const Type_handler *b)
const override
{
return NULL;
}
};
static Type_collection_row type_collection_row;
const Type_collection *Type_handler_row::type_collection() const
{
return &type_collection_row;
}
bool Type_handler_data::init()
{
return type_collection_geometry.init(this);
}
Schema *Type_handler::schema() const
{
return &mariadb_schema;
}
const Type_handler *
Type_handler::handler_by_name(THD *thd, const LEX_CSTRING &name)
{
plugin_ref plugin;
if ((plugin= my_plugin_lock_by_name(thd, &name, MariaDB_DATA_TYPE_PLUGIN)))
{
/*
Data type plugins do not maintain ref_count yet.
For now we have only mandatory built-in plugins
and dynamic plugins for test purposes.
It should be safe to unlock the plugin immediately.
*/
const Type_handler *ph= reinterpret_cast<st_mariadb_data_type*>
(plugin_decl(plugin)->info)->type_handler;
plugin_unlock(thd, plugin);
return ph;
}
const Type_handler *ha= Type_collection_geometry_handler_by_name(name);
if (!ha && type_handler_vector.name().eq(name))
return &type_handler_vector;
return ha;
}
#ifndef DBUG_OFF
static const Type_handler *frm_data_type_info_emulate(const LEX_CSTRING &name)
{
if (Name(STRING_WITH_LEN("xchar")).eq(name))
return &type_handler_string;
if (Name(STRING_WITH_LEN("xblob")).eq(name))
return &type_handler_blob;
return NULL;
}
#endif
const Type_handler *
Type_handler::handler_by_name_or_error(THD *thd, const LEX_CSTRING &name)
{
const Type_handler *h= handler_by_name(thd, name);
DBUG_EXECUTE_IF("emulate_handler_by_name_or_error_failure", h= NULL;);
if (!h)
{
DBUG_EXECUTE_IF("frm_data_type_info_emulate",
if ((h= frm_data_type_info_emulate(name)))
return h;
);
my_error(ER_UNKNOWN_DATA_TYPE, MYF(0),
ErrConvString(name.str, name.length, system_charset_info).ptr());
}
return h;
}
Type_handler_data *type_handler_data= NULL;
bool Float::to_string(String *val_buffer, uint dec) const
{
return val_buffer->set_real(m_value, dec, &my_charset_numeric);
}
String_ptr::String_ptr(Item *item, String *buffer)
:m_string_ptr(item->val_str(buffer))
{ }
Ascii_ptr::Ascii_ptr(Item *item, String *buffer)
:String_ptr(item->val_str_ascii(buffer))
{ }
void VDec::set(Item *item)
{
m_ptr= item->val_decimal(&m_buffer);
DBUG_ASSERT((m_ptr == NULL) == item->null_value);
}
VDec::VDec(Item *item)
{
m_ptr= item->val_decimal(&m_buffer);
DBUG_ASSERT((m_ptr == NULL) == item->null_value);
}
VDec_op::VDec_op(Item_func_hybrid_field_type *item)
{
m_ptr= item->decimal_op(&m_buffer);
DBUG_ASSERT((m_ptr == NULL) == item->null_value);
}
date_conv_mode_t Temporal::sql_mode_for_dates(THD *thd)
{
return ::sql_mode_for_dates(thd);
}
time_round_mode_t Temporal::default_round_mode(THD *thd)
{
return thd->temporal_round_mode();
}
time_round_mode_t Timestamp::default_round_mode(THD *thd)
{
return thd->temporal_round_mode();
}
my_decimal *Temporal::to_decimal(my_decimal *to) const
{
return date2my_decimal(this, to);
}
my_decimal *Temporal::bad_to_decimal(my_decimal *to) const
{
my_decimal_set_zero(to);
return NULL;
}
void Temporal::make_from_str(THD *thd, Warn *warn,
const char *str, size_t length,
CHARSET_INFO *cs, date_mode_t fuzzydate)
{
DBUG_EXECUTE_IF("str_to_datetime_warn",
push_warning(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_YES, ErrConvString(str, length,cs).ptr()););
if (str_to_temporal(thd, warn, str, length, cs, fuzzydate))
make_fuzzy_date(&warn->warnings, date_conv_mode_t(fuzzydate));
if (warn->warnings)
warn->set_str(str, length, &my_charset_bin);
}
Temporal_hybrid::Temporal_hybrid(THD *thd, Item *item, date_mode_t fuzzydate)
{
if (item->get_date(thd, this, fuzzydate))
time_type= MYSQL_TIMESTAMP_NONE;
}
uint Timestamp::binary_length_to_precision(uint length)
{
switch (length) {
case 4: return 0;
case 5: return 2;
case 6: return 4;
case 7: return 6;
}
DBUG_ASSERT(0);
return 0;
}
Timestamp::Timestamp(const Native &native)
{
DBUG_ASSERT(native.length() >= 4 && native.length() <= 7);
uint dec= binary_length_to_precision(native.length());
my_timestamp_from_binary(this, (const uchar *) native.ptr(), dec);
}
bool Timestamp::to_native(Native *to, uint decimals) const
{
uint len= my_timestamp_binary_length(decimals);
if (to->reserve(len))
{
to->length(0); // Safety: set to '0000-00-00 00:00:00' on failures
return true;
}
my_timestamp_to_binary(this, (uchar *) to->ptr(), decimals);
to->length(len);
return false;
}
bool Timestamp::to_TIME(THD *thd, MYSQL_TIME *to, date_mode_t fuzzydate) const
{
return thd->timestamp_to_TIME(to, (my_time_t) tv_sec, tv_usec, fuzzydate);
}
Timestamp::Timestamp(THD *thd, const MYSQL_TIME *ltime, uint *error_code)
:Timeval(TIME_to_timestamp(thd, ltime, error_code), ltime->second_part)
{ }
Timestamp_or_zero_datetime::Timestamp_or_zero_datetime(THD *thd,
const MYSQL_TIME *ltime,
uint *error_code)
:Timestamp(thd, ltime, error_code),
m_is_zero_datetime(*error_code == ER_WARN_DATA_OUT_OF_RANGE)
{
if (m_is_zero_datetime)
{
if (!non_zero_date(ltime))
*error_code= 0; // ltime was '0000-00-00 00:00:00'
}
else if (*error_code == ER_WARN_INVALID_TIMESTAMP)
*error_code= 0; // ltime fell into spring time gap, adjusted.
}
bool Timestamp_or_zero_datetime::to_TIME(THD *thd, MYSQL_TIME *to,
date_mode_t fuzzydate) const
{
if (m_is_zero_datetime)
{
set_zero_time(to, MYSQL_TIMESTAMP_DATETIME);
return false;
}
return Timestamp::to_TIME(thd, to, fuzzydate);
}
bool Timestamp_or_zero_datetime::to_native(Native *to, uint decimals) const
{
if (m_is_zero_datetime)
{
to->length(0);
return false;
}
return Timestamp::to_native(to, decimals);
}
int Timestamp_or_zero_datetime_native::save_in_field(Field *field,
uint decimals) const
{
field->set_notnull();
if (field->type_handler()->type_handler_for_native_format() ==
&type_handler_timestamp2)
return field->store_native(*this);
if (is_zero_datetime())
{
static Datetime zero(Datetime::zero());
return field->store_time_dec(zero.get_mysql_time(), decimals);
}
return field->store_timestamp_dec(Timestamp(*this), decimals);
}
void Sec6::make_from_decimal(const my_decimal *d, ulong *nanoseconds)
{
m_neg= my_decimal2seconds(d, &m_sec, &m_usec, nanoseconds);
m_truncated= (m_sec >= LONGLONG_MAX);
}
void Sec6::make_from_double(double nr, ulong *nanoseconds)
{
if ((m_neg= nr < 0))
nr= -nr;
if ((m_truncated= nr > (double) LONGLONG_MAX))
{
m_sec= LONGLONG_MAX;
m_usec= 0;
*nanoseconds= 0;
}
else
{
m_sec= (ulonglong) nr;
m_usec= (ulong) ((nr - floor(nr)) * 1000000000);
*nanoseconds= m_usec % 1000;
m_usec/= 1000;
}
}
void Sec6::make_truncated_warning(THD *thd, const char *type_str) const
{
char buff[1 + MAX_BIGINT_WIDTH + 1 + 6 + 1]; // '-' int '.' frac '\0'
to_string(buff, sizeof(buff));
thd->push_warning_truncated_wrong_value(type_str, buff);
}
bool Sec6::convert_to_mysql_time(THD *thd, int *warn, MYSQL_TIME *ltime,
date_mode_t fuzzydate) const
{
bool rc= fuzzydate & (TIME_INTERVAL_hhmmssff | TIME_INTERVAL_DAY) ?
to_datetime_or_to_interval_hhmmssff(ltime, warn) :
fuzzydate & TIME_TIME_ONLY ?
to_datetime_or_time(ltime, warn, date_conv_mode_t(fuzzydate)) :
to_datetime_or_date(ltime, warn, date_conv_mode_t(fuzzydate));
DBUG_ASSERT(*warn || !rc);
if (truncated())
*warn|= MYSQL_TIME_WARN_TRUNCATED;
return rc;
}
void Temporal::push_conversion_warnings(THD *thd, bool totally_useless_value,
int warn,
const char *typestr,
const char *db_name,
const char *table_name,
const char *field_name,
const char *value)
{
if (MYSQL_TIME_WARN_HAVE_WARNINGS(warn))
thd->push_warning_wrong_or_truncated_value(Sql_condition::WARN_LEVEL_WARN,
totally_useless_value,
typestr, value,
db_name, table_name,
field_name);
else if (MYSQL_TIME_WARN_HAVE_NOTES(warn))
thd->push_warning_wrong_or_truncated_value(Sql_condition::WARN_LEVEL_NOTE,
false, typestr, value,
db_name, table_name,
field_name);
}
VSec9::VSec9(THD *thd, Item *item, const char *type_str, ulonglong limit)
{
if (item->decimals == 0)
{ // optimize for an important special case
Longlong_hybrid nr(item->val_int(), item->unsigned_flag);
make_from_int(nr);
m_is_null= item->null_value;
if (!m_is_null && m_sec > limit)
{
m_sec= limit;
m_truncated= true;
ErrConvInteger err(nr);
thd->push_warning_truncated_wrong_value(type_str, err.ptr());
}
}
else if (item->cmp_type() == REAL_RESULT)
{
double nr= item->val_real();
make_from_double(nr, &m_nsec);
m_is_null= item->null_value;
if (!m_is_null && m_sec > limit)
{
m_sec= limit;
m_truncated= true;
}
if (m_truncated)
{
ErrConvDouble err(nr);
thd->push_warning_truncated_wrong_value(type_str, err.ptr());
}
}
else
{
VDec tmp(item);
(m_is_null= tmp.is_null()) ? reset() : make_from_decimal(tmp.ptr(), &m_nsec);
if (!m_is_null && m_sec > limit)
{
m_sec= limit;
m_truncated= true;
}
if (m_truncated)
{
ErrConvDecimal err(tmp.ptr());
thd->push_warning_truncated_wrong_value(type_str, err.ptr());
}
}
}
Year::Year(longlong value, bool unsigned_flag, uint length)
{
if ((m_truncated= (value < 0))) // Negative or huge unsigned
m_year= unsigned_flag ? 9999 : 0;
else if (value > 9999)
{
m_truncated= true;
m_year= 9999;
}
else if (length == 2)
{
m_year= value < 70 ? (uint) value + 2000 :
value <= 1900 ? (uint) value + 1900 :
(uint) value;
}
else
m_year= (uint) value;
DBUG_ASSERT(m_year <= 9999);
}
uint Year::year_precision(const Item *item) const
{
return item->type_handler() == &type_handler_year2 ? 2 : 4;
}
VYear::VYear(Item *item)
:Year_null(item->to_longlong_null(), item->unsigned_flag, year_precision(item))
{ }
VYear_op::VYear_op(Item_func_hybrid_field_type *item)
:Year_null(item->to_longlong_null_op(), item->unsigned_flag,
year_precision(item))
{ }
const LEX_CSTRING Interval_DDhhmmssff::m_type_name=
{STRING_WITH_LEN("INTERVAL DAY TO SECOND")};
Interval_DDhhmmssff::Interval_DDhhmmssff(THD *thd, Status *st,
bool push_warnings,
Item *item, ulong max_hour,
time_round_mode_t mode, uint dec)
{
switch (item->cmp_type()) {
case ROW_RESULT:
DBUG_ASSERT(0);
time_type= MYSQL_TIMESTAMP_NONE;
break;
case TIME_RESULT:
{
// Rounding mode is not important here
if (item->get_date(thd, this, Options(TIME_TIME_ONLY, TIME_FRAC_NONE)))
time_type= MYSQL_TIMESTAMP_NONE;
else if (time_type != MYSQL_TIMESTAMP_TIME)
{
st->warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
push_warning_wrong_or_truncated_value(thd, ErrConvTime(this),
st->warnings);
time_type= MYSQL_TIMESTAMP_NONE;
}
break;
}
case INT_RESULT:
case REAL_RESULT:
case DECIMAL_RESULT:
case STRING_RESULT:
{
StringBuffer<STRING_BUFFER_USUAL_SIZE> tmp;
String *str= item->val_str(&tmp);
if (!str)
time_type= MYSQL_TIMESTAMP_NONE;
else if (str_to_DDhhmmssff(st, str->ptr(), str->length(), str->charset(),
UINT_MAX32))
{
if (push_warnings)
thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
m_type_name.str,
ErrConvString(str).ptr());
time_type= MYSQL_TIMESTAMP_NONE;
}
else
{
if (mode == TIME_FRAC_ROUND)
time_round_or_set_max(dec, &st->warnings, max_hour, st->nanoseconds);
if (hour > max_hour)
{
st->warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
time_type= MYSQL_TIMESTAMP_NONE;
}
// Warn if hour or nanosecond truncation happened
if (push_warnings)
push_warning_wrong_or_truncated_value(thd, ErrConvString(str),
st->warnings);
}
}
break;
}
DBUG_ASSERT(is_valid_value_slow());
}
void
Interval_DDhhmmssff::push_warning_wrong_or_truncated_value(THD *thd,
const ErrConv &str,
int warnings)
{
if (warnings & MYSQL_TIME_WARN_OUT_OF_RANGE)
{
thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
m_type_name.str, str.ptr());
}
else if (MYSQL_TIME_WARN_HAVE_WARNINGS(warnings))
{
thd->push_warning_truncated_wrong_value(Sql_condition::WARN_LEVEL_WARN,
m_type_name.str, str.ptr());
}
else if (MYSQL_TIME_WARN_HAVE_NOTES(warnings))
{
thd->push_warning_truncated_wrong_value(Sql_condition::WARN_LEVEL_NOTE,
m_type_name.str, str.ptr());
}
}
uint Interval_DDhhmmssff::fsp(THD *thd, Item *item)
{
switch (item->cmp_type()) {
case INT_RESULT:
case TIME_RESULT:
return item->decimals;
case REAL_RESULT:
case DECIMAL_RESULT:
return MY_MIN(item->decimals, TIME_SECOND_PART_DIGITS);
case ROW_RESULT:
DBUG_ASSERT(0);
return 0;
case STRING_RESULT:
break;
}
if (!item->can_eval_in_optimize())
return TIME_SECOND_PART_DIGITS;
Status st;
Interval_DDhhmmssff it(thd, &st, false/*no warnings*/, item, UINT_MAX32,
TIME_FRAC_TRUNCATE, TIME_SECOND_PART_DIGITS);
return it.is_valid_interval_DDhhmmssff() ? st.precision :
TIME_SECOND_PART_DIGITS;
}
bool Time::to_native(Native *to, uint decimals) const
{
if (!is_valid_time())
{
to->length(0);
return true;
}
uint len= my_time_binary_length(decimals);
if (to->reserve(len))
return true;
longlong tmp= TIME_to_longlong_time_packed(get_mysql_time());
my_time_packed_to_binary(tmp, (uchar*) to->ptr(), decimals);
to->length(len);
return false;
}
void Time::make_from_item(THD *thd, int *warn, Item *item, const Options opt)
{
*warn= 0;
if (item->get_date(thd, this, opt))
time_type= MYSQL_TIMESTAMP_NONE;
else
valid_MYSQL_TIME_to_valid_value(thd, warn, opt);
}
static uint msec_round_add[7]=
{
500000000,
50000000,
5000000,
500000,
50000,
5000,
0
};
Sec9 & Sec9::round(uint dec)
{
DBUG_ASSERT(dec <= TIME_SECOND_PART_DIGITS);
if (Sec6::add_nanoseconds(m_nsec + msec_round_add[dec]))
m_sec++;
m_nsec= 0;
Sec6::trunc(dec);
return *this;
}
void Timestamp::round_or_set_max(uint dec, int *warn)
{
DBUG_ASSERT(dec <= TIME_SECOND_PART_DIGITS);
if (add_nanoseconds_usec(msec_round_add[dec]) &&
tv_sec++ >= TIMESTAMP_MAX_VALUE)
{
tv_sec= TIMESTAMP_MAX_VALUE;
tv_usec= TIME_MAX_SECOND_PART;
*warn|= MYSQL_TIME_WARN_OUT_OF_RANGE;
}
my_timeval_trunc(this, dec);
}
bool Temporal::add_nanoseconds_with_round(THD *thd, int *warn,
date_conv_mode_t mode,
ulong nsec)
{
switch (time_type) {
case MYSQL_TIMESTAMP_TIME:
{
ulong max_hour= (mode & (TIME_INTERVAL_DAY | TIME_INTERVAL_hhmmssff)) ?
TIME_MAX_INTERVAL_HOUR : TIME_MAX_HOUR;
time_round_or_set_max(6, warn, max_hour, nsec);
return false;
}
case MYSQL_TIMESTAMP_DATETIME:
return datetime_round_or_invalidate(thd, 6, warn, nsec);
case MYSQL_TIMESTAMP_DATE:
return false;
case MYSQL_TIMESTAMP_NONE:
return false;
case MYSQL_TIMESTAMP_ERROR:
break;
}
DBUG_ASSERT(0);
return false;
}
void Temporal::time_round_or_set_max(uint dec, int *warn,
ulong max_hour, ulong nsec)
{
DBUG_ASSERT(dec <= TIME_SECOND_PART_DIGITS);
if (add_nanoseconds_mmssff(nsec) && ++hour > max_hour)
{
time_hhmmssff_set_max(max_hour);
*warn|= MYSQL_TIME_WARN_OUT_OF_RANGE;
}
my_time_trunc(this, dec);
}
void Time::round_or_set_max(uint dec, int *warn, ulong nsec)
{
Temporal::time_round_or_set_max(dec, warn, TIME_MAX_HOUR, nsec);
DBUG_ASSERT(is_valid_time_slow());
}
void Time::round_or_set_max(uint dec, int *warn)
{
round_or_set_max(dec, warn, msec_round_add[dec]);
}
/**
Create from a DATETIME by subtracting a given number of days,
implementing an optimized version of calc_time_diff().
*/
void Time::make_from_datetime_with_days_diff(int *warn, const MYSQL_TIME *from,
long days)
{
*warn= 0;
DBUG_ASSERT(from->time_type == MYSQL_TIMESTAMP_DATETIME ||
from->time_type == MYSQL_TIMESTAMP_DATE);
long daynr= calc_daynr(from->year, from->month, from->day);
long daydiff= daynr - days;
if (!daynr) // Zero date
{
set_zero_time(this, MYSQL_TIMESTAMP_TIME);
neg= true;
hour= TIME_MAX_HOUR + 1; // to report "out of range" in "warn"
}
else if (daydiff >=0)
{
neg= false;
year= month= day= 0;
hhmmssff_copy(from);
hour+= daydiff * 24;
time_type= MYSQL_TIMESTAMP_TIME;
}
else
{
longlong timediff= ((((daydiff * 24LL +
from->hour) * 60LL +
from->minute) * 60LL +
from->second) * 1000000LL +
from->second_part);
unpack_time(timediff, this, MYSQL_TIMESTAMP_TIME);
if (year || month)
{
*warn|= MYSQL_TIME_WARN_OUT_OF_RANGE;
year= month= day= 0;
hour= TIME_MAX_HOUR + 1;
}
}
// The above code can generate TIME values outside of the valid TIME range.
adjust_time_range_or_invalidate(warn);
}
void Time::make_from_datetime_move_day_to_hour(int *warn,
const MYSQL_TIME *from)
{
*warn= 0;
DBUG_ASSERT(from->time_type == MYSQL_TIMESTAMP_DATE ||
from->time_type == MYSQL_TIMESTAMP_DATETIME);
time_type= MYSQL_TIMESTAMP_TIME;
neg= false;
year= month= day= 0;
hhmmssff_copy(from);
datetime_to_time_YYYYMMDD_000000DD_mix_to_hours(warn, from->year,
from->month, from->day);
adjust_time_range_or_invalidate(warn);
}
void Time::make_from_datetime(int *warn, const MYSQL_TIME *from, long curdays)
{
if (!curdays)
make_from_datetime_move_day_to_hour(warn, from);
else
make_from_datetime_with_days_diff(warn, from, curdays);
}
void Time::make_from_time(int *warn, const MYSQL_TIME *from)
{
DBUG_ASSERT(from->time_type == MYSQL_TIMESTAMP_TIME);
if (from->year || from->month)
make_from_out_of_range(warn);
else
{
*warn= 0;
DBUG_ASSERT(from->day == 0);
*(static_cast<MYSQL_TIME*>(this))= *from;
adjust_time_range_or_invalidate(warn);
}
}
uint Time::binary_length_to_precision(uint length)
{
switch (length) {