| Server IP : 66.29.132.122 / Your IP : 18.118.139.82 Web Server : LiteSpeed System : Linux business142.web-hosting.com 4.18.0-553.lve.el8.x86_64 #1 SMP Mon May 27 15:27:34 UTC 2024 x86_64 User : admazpex ( 531) PHP Version : 7.2.34 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : OFF | Pkexec : OFF Directory : /usr/include/mysql/server/private/ |
Upload File : |
#ifndef SQL_TYPE_FIXEDBIN_H
#define SQL_TYPE_FIXEDBIN_H
/* Copyright (c) 2019,2021 MariaDB Corporation
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/*
This is a common code for plugin (?) types that are generally
handled like strings, but have their own fixed size on-disk binary storage
format and their own (variable size) canonical string representation.
Examples are INET6 and UUID types.
*/
#define MYSQL_SERVER
#include "sql_class.h" // THD, SORT_FIELD_ATTR
#include "opt_range.h" // SEL_ARG, null_element
#include "sql_type_fixedbin_storage.h"
/***********************************************************************/
template<class FbtImpl> class Type_collection_fbt;
template<class FbtImpl, class TypeCollectionImpl = Type_collection_fbt<FbtImpl> >
class Type_handler_fbt: public Type_handler
{
/* =[ internal helper classes ]=============================== */
public:
class Fbt: public FbtImpl
{
protected:
using FbtImpl::m_buffer;
bool make_from_item(Item *item, bool warn)
{
if (item->type_handler() == singleton())
{
Native tmp(m_buffer, sizeof(m_buffer));
bool rc= item->val_native(current_thd, &tmp);
if (rc)
return true;
DBUG_ASSERT(tmp.length() == sizeof(m_buffer));
if (tmp.ptr() != m_buffer)
memcpy(m_buffer, tmp.ptr(), sizeof(m_buffer));
return false;
}
StringBuffer<FbtImpl::max_char_length()+1> tmp;
String *str= item->val_str(&tmp);
return str ? make_from_character_or_binary_string(str, warn) : true;
}
bool character_string_to_fbt(const char *str, size_t str_length,
CHARSET_INFO *cs)
{
if (cs->state & MY_CS_NONASCII)
{
char tmp[FbtImpl::max_char_length()+1];
String_copier copier;
uint length= copier.well_formed_copy(&my_charset_latin1, tmp, sizeof(tmp),
cs, str, str_length);
return FbtImpl::ascii_to_fbt(tmp, length);
}
return FbtImpl::ascii_to_fbt(str, str_length);
}
bool make_from_character_or_binary_string(const String *str, bool warn)
{
if (str->charset() != &my_charset_bin)
{
bool rc= character_string_to_fbt(str->ptr(), str->length(),
str->charset());
if (rc && warn)
current_thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
singleton()->name().ptr(), ErrConvString(str).ptr());
return rc;
}
if (str->length() != sizeof(m_buffer))
{
if (warn)
current_thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
singleton()->name().ptr(), ErrConvString(str).ptr());
return true;
}
DBUG_ASSERT(str->ptr() != m_buffer);
memcpy(m_buffer, str->ptr(), sizeof(m_buffer));
return false;
}
bool binary_to_fbt(const char *str, size_t length)
{
if (length != sizeof(m_buffer))
return true;
memcpy(m_buffer, str, length);
return false;
}
Fbt() { }
public:
static Fbt zero()
{
Fbt fbt;
fbt.set_zero();
return fbt;
}
static Fbt record_to_memory(const char *ptr)
{
Fbt fbt;
FbtImpl::record_to_memory(fbt.m_buffer, ptr);
return fbt;
}
/*
Check at Item's fix_fields() time if "item" can return a nullable value
on conversion to Fbt, or conversion produces a NOT NULL Fbt value.
*/
static bool fix_fields_maybe_null_on_conversion_to_fbt(Item *item)
{
if (item->maybe_null())
return true;
if (item->type_handler() == singleton())
return false;
if (!item->const_item() || item->is_expensive())
return true;
return Fbt_null(item, false).is_null();
}
/*
Check at fix_fields() time if any of the items can return a nullable
value on conversion to Fbt.
*/
static bool fix_fields_maybe_null_on_conversion_to_fbt(Item **items,
uint count)
{
for (uint i= 0; i < count; i++)
{
if (Fbt::fix_fields_maybe_null_on_conversion_to_fbt(items[i]))
return true;
}
return false;
}
public:
Fbt(Item *item, bool *error, bool warn= true)
{
*error= make_from_item(item, warn);
}
void to_record(char *str, size_t str_size) const
{
DBUG_ASSERT(str_size >= sizeof(m_buffer));
FbtImpl::memory_to_record(str, m_buffer);
}
bool to_binary(String *to) const
{
return to->copy(m_buffer, sizeof(m_buffer), &my_charset_bin);
}
bool to_native(Native *to) const
{
return to->copy(m_buffer, sizeof(m_buffer));
}
bool to_string(String *to) const
{
to->set_charset(&my_charset_latin1);
if (to->alloc(FbtImpl::max_char_length()+1))
return true;
to->length((uint32) FbtImpl::to_string(const_cast<char*>(to->ptr()),
FbtImpl::max_char_length()+1));
return false;
}
int cmp(const Binary_string &other) const
{
return FbtImpl::cmp(FbtImpl::to_lex_cstring(), other.to_lex_cstring());
}
int cmp(const Fbt &other) const
{
return FbtImpl::cmp(FbtImpl::to_lex_cstring(), other.to_lex_cstring());
}
};
class Fbt_null: public Fbt, public Null_flag
{
public:
// Initialize from a text representation
Fbt_null(const char *str, size_t length, CHARSET_INFO *cs)
:Null_flag(Fbt::character_string_to_fbt(str, length, cs)) { }
Fbt_null(const String &str)
:Fbt_null(str.ptr(), str.length(), str.charset()) { }
// Initialize from a binary representation
Fbt_null(const char *str, size_t length)
:Null_flag(Fbt::binary_to_fbt(str, length)) { }
Fbt_null(const Binary_string &str)
:Fbt_null(str.ptr(), str.length()) { }
// Initialize from an Item
Fbt_null(Item *item, bool warn= true)
:Null_flag(Fbt::make_from_item(item, warn)) { }
public:
const Fbt& to_fbt() const
{
DBUG_ASSERT(!is_null());
return *this;
}
void to_record(char *str, size_t str_size) const
{
to_fbt().to_record(str, str_size);
}
bool to_binary(String *to) const
{
return to_fbt().to_binary(to);
}
bool to_string(String *to) const
{
return to_fbt().to_string(to);
}
};
/* =[ API classes ]=========================================== */
class Type_std_attributes_fbt: public Type_std_attributes
{
public:
Type_std_attributes_fbt()
:Type_std_attributes(
Type_numeric_attributes(FbtImpl::max_char_length(), 0, true),
DTCollation_numeric())
{ }
};
class Item_literal_fbt: public Item_literal
{
Fbt m_value;
public:
Item_literal_fbt(THD *thd)
:Item_literal(thd),
m_value(Fbt::zero())
{ }
Item_literal_fbt(THD *thd, const Fbt &value)
:Item_literal(thd),
m_value(value)
{ }
const Type_handler *type_handler() const override
{
return singleton();
}
longlong val_int() override
{
return 0;
}
double val_real() override
{
return 0;
}
String *val_str(String *to) override
{
return m_value.to_string(to) ? NULL : to;
}
my_decimal *val_decimal(my_decimal *to) override
{
my_decimal_set_zero(to);
return to;
}
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
return false;
}
bool val_native(THD *thd, Native *to) override
{
return m_value.to_native(to);
}
void print(String *str, enum_query_type query_type) override
{
StringBuffer<FbtImpl::max_char_length()+64> tmp;
tmp.append(singleton()->name().lex_cstring());
my_caseup_str(&my_charset_latin1, tmp.c_ptr());
str->append(tmp);
str->append('\'');
m_value.to_string(&tmp);
str->append(tmp);
str->append('\'');
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_literal_fbt>(thd, this); }
Item *do_build_clone(THD *thd) const override { return get_copy(thd); }
// Non-overriding methods
void set_value(const Fbt &value)
{
m_value= value;
}
};
class Field_fbt: public Field
{
static void set_min_value(char *ptr)
{
memset(ptr, 0, FbtImpl::binary_length());
}
static void set_max_value(char *ptr)
{
memset(ptr, 0xFF, FbtImpl::binary_length());
}
void store_warning(const ErrConv &str,
Sql_condition::enum_warning_level level)
{
if (get_thd()->count_cuted_fields <= CHECK_FIELD_EXPRESSION)
return;
const TABLE_SHARE *s= table->s;
static const Name type_name= singleton()->name();
get_thd()->push_warning_truncated_value_for_field(level, type_name.ptr(),
str.ptr(), s ? s->db.str : nullptr, s ? s->table_name.str : nullptr,
field_name.str);
}
int set_null_with_warn(const ErrConv &str)
{
store_warning(str, Sql_condition::WARN_LEVEL_WARN);
set_null();
return 1;
}
int set_min_value_with_warn(const ErrConv &str)
{
store_warning(str, Sql_condition::WARN_LEVEL_WARN);
set_min_value((char*) ptr);
return 1;
}
int set_max_value_with_warn(const ErrConv &str)
{
store_warning(str, Sql_condition::WARN_LEVEL_WARN);
set_max_value((char*) ptr);
return 1;
}
int store_fbt_null_with_warn(const Fbt_null &fbt,
const ErrConvString &err)
{
DBUG_ASSERT(marked_for_write_or_computed());
if (fbt.is_null())
return maybe_null() ? set_null_with_warn(err)
: set_min_value_with_warn(err);
fbt.to_record((char *) ptr, FbtImpl::binary_length());
return 0;
}
public:
Field_fbt(const LEX_CSTRING *field_name_arg, const Record_addr &rec)
:Field(rec.ptr(), FbtImpl::max_char_length(),
rec.null_ptr(), rec.null_bit(), Field::NONE, field_name_arg)
{
flags|= BINARY_FLAG | UNSIGNED_FLAG;
}
const Type_handler *type_handler() const override
{
return singleton();
}
uint32 max_display_length() const override { return field_length; }
bool str_needs_quotes() const override { return true; }
const DTCollation &dtcollation() const override
{
static DTCollation_numeric c;
return c;
}
CHARSET_INFO *charset(void) const override { return &my_charset_numeric; }
const CHARSET_INFO *sort_charset(void) const override { return &my_charset_bin; }
/**
This makes client-server protocol convert the value according
to @@character_set_client.
*/
bool binary() const override { return false; }
enum ha_base_keytype key_type() const override { return HA_KEYTYPE_BINARY; }
bool is_equal(const Column_definition &new_field) const override
{
return new_field.type_handler() == type_handler();
}
bool eq_def(const Field *field) const override
{
return Field::eq_def(field);
}
double pos_in_interval(Field *min, Field *max) override
{
return pos_in_interval_val_str(min, max, 0);
}
int cmp(const uchar *a, const uchar *b) const override
{ return memcmp(a, b, pack_length()); }
void sort_string(uchar *to, uint length) override
{
DBUG_ASSERT(length == pack_length());
memcpy(to, ptr, length);
}
uint32 pack_length() const override
{
return FbtImpl::binary_length();
}
uint pack_length_from_metadata(uint field_metadata) const override
{
return FbtImpl::binary_length();
}
void sql_type(String &str) const override
{
static Name name= singleton()->name();
str.set_ascii(name.ptr(), name.length());
}
void make_send_field(Send_field *to) override
{
Field::make_send_field(to);
to->set_data_type_name(singleton()->name().lex_cstring());
}
bool validate_value_in_record(THD *thd, const uchar *record) const override
{
return false;
}
bool val_native(Native *to) override
{
DBUG_ASSERT(marked_for_read());
if (to->alloc(FbtImpl::binary_length()))
return true;
to->length(FbtImpl::binary_length());
FbtImpl::record_to_memory((char*) to->ptr(), (const char*) ptr);
return false;
}
Fbt to_fbt() const
{
DBUG_ASSERT(marked_for_read());
return Fbt::record_to_memory((const char*) ptr);
}
String *val_str(String *val_buffer, String *) override
{
return to_fbt().to_string(val_buffer) ? NULL : val_buffer;
}
my_decimal *val_decimal(my_decimal *to) override
{
DBUG_ASSERT(marked_for_read());
my_decimal_set_zero(to);
return to;
}
longlong val_int() override
{
DBUG_ASSERT(marked_for_read());
return 0;
}
double val_real() override
{
DBUG_ASSERT(marked_for_read());
return 0;
}
bool get_date(MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{
DBUG_ASSERT(marked_for_read());
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
return false;
}
bool val_bool(void) override
{
DBUG_ASSERT(marked_for_read());
return !Fbt::only_zero_bytes((const char *) ptr, FbtImpl::binary_length());
}
int store_native(const Native &value) override
{
DBUG_ASSERT(marked_for_write_or_computed());
DBUG_ASSERT(value.length() == FbtImpl::binary_length());
FbtImpl::memory_to_record((char*) ptr, value.ptr());
return 0;
}
int store(const char *str, size_t length, CHARSET_INFO *cs) override
{
return cs == &my_charset_bin ? store_binary(str, length)
: store_text(str, length, cs);
}
int store_text(const char *str, size_t length, CHARSET_INFO *cs) override
{
return store_fbt_null_with_warn(Fbt_null(str, length, cs),
ErrConvString(str, length, cs));
}
int store_binary(const char *str, size_t length) override
{
return store_fbt_null_with_warn(Fbt_null(str, length),
ErrConvString(str, length,
&my_charset_bin));
}
int store_hex_hybrid(const char *str, size_t length) override
{
return Field_fbt::store_binary(str, length);
}
int store_decimal(const my_decimal *num) override
{
DBUG_ASSERT(marked_for_write_or_computed());
return set_min_value_with_warn(ErrConvDecimal(num));
}
int store(longlong nr, bool unsigned_flag) override
{
DBUG_ASSERT(marked_for_write_or_computed());
return set_min_value_with_warn(
ErrConvInteger(Longlong_hybrid(nr, unsigned_flag)));
}
int store(double nr) override
{
DBUG_ASSERT(marked_for_write_or_computed());
return set_min_value_with_warn(ErrConvDouble(nr));
}
int store_time_dec(const MYSQL_TIME *ltime, uint dec) override
{
DBUG_ASSERT(marked_for_write_or_computed());
return set_min_value_with_warn(ErrConvTime(ltime));
}
/*** Field conversion routines ***/
int store_field(Field *from) override
{
// INSERT INTO t1 (fbt_field) SELECT different_field_type FROM t2;
return from->save_in_field(this);
}
int save_in_field(Field *to) override
{
// INSERT INTO t2 (different_field_type) SELECT fbt_field FROM t1;
if (to->charset() == &my_charset_bin &&
dynamic_cast<const Type_handler_general_purpose_string*>
(to->type_handler()))
{
NativeBuffer<FbtImpl::binary_length()+1> res;
val_native(&res);
return to->store(res.ptr(), res.length(), &my_charset_bin);
}
return save_in_field_str(to);
}
Copy_func *get_copy_func(const Field *from) const override
{
// ALTER to FBT from another field
return do_field_string;
}
Copy_func *get_copy_func_to(const Field *to) const override
{
if (type_handler() == to->type_handler())
{
// ALTER from FBT to FBT
DBUG_ASSERT(pack_length() == to->pack_length());
DBUG_ASSERT(charset() == to->charset());
DBUG_ASSERT(sort_charset() == to->sort_charset());
return Field::do_field_eq;
}
// ALTER from FBT to another fbt type
if (to->charset() == &my_charset_bin &&
dynamic_cast<const Type_handler_general_purpose_string*>
(to->type_handler()))
{
/*
ALTER from FBT to a binary string type, e.g.:
BINARY, TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB
*/
return do_field_fbt_native_to_binary;
}
return do_field_string;
}
static void do_field_fbt_native_to_binary(Copy_field *copy)
{
NativeBuffer<FbtImpl::binary_length()+1> res;
copy->from_field->val_native(&res);
copy->to_field->store(res.ptr(), res.length(), &my_charset_bin);
}
bool memcpy_field_possible(const Field *from) const override
{
// INSERT INTO t1 (fbt_field) SELECT field2 FROM t2;
return type_handler() == from->type_handler();
}
enum_conv_type rpl_conv_type_from(const Conv_source &source,
const Relay_log_info *rli,
const Conv_param ¶m) const override
{
if (type_handler() == source.type_handler() ||
(source.type_handler() == &type_handler_string &&
source.type_handler()->max_display_length_for_field(source) ==
FbtImpl::binary_length()))
return rpl_conv_type_from_same_data_type(source.metadata(), rli, param);
return CONV_TYPE_IMPOSSIBLE;
}
/*** Optimizer routines ***/
bool test_if_equality_guarantees_uniqueness(const Item *const_item) const override
{
/*
This condition:
WHERE fbt_field=const
should return a single distinct value only,
as comparison is done according to FBT.
*/
return true;
}
bool can_be_substituted_to_equal_item(const Context &ctx,
const Item_equal *item_equal)
override
{
switch (ctx.subst_constraint()) {
case ANY_SUBST:
return ctx.compare_type_handler() == item_equal->compare_type_handler();
case IDENTITY_SUBST:
return true;
}
return false;
}
Item *get_equal_const_item(THD *thd, const Context &ctx,
Item *const_item) override
{
Fbt_null tmp(const_item);
if (tmp.is_null())
return NULL;
return new (thd->mem_root) Item_literal_fbt(thd, tmp);
}
Data_type_compatibility can_optimize_keypart_ref(const Item_bool_func *cond,
const Item *item)
const override
{
/*
Mixing of two different non-traditional types is currently prevented.
This may change in the future.
*/
DBUG_ASSERT(item->type_handler()->type_handler_base_or_self()->
is_traditional_scalar_type() ||
item->type_handler() == type_handler());
return Data_type_compatibility::OK;
}
/**
Test if Field can use range optimizer for a standard comparison operation:
<=, <, =, <=>, >, >=
Note, this method does not cover spatial operations.
*/
Data_type_compatibility can_optimize_range(const Item_bool_func *cond,
const Item *item,
bool is_eq_func) const override
{
// See the DBUG_ASSERT comment in can_optimize_keypart_ref()
DBUG_ASSERT(item->type_handler()->type_handler_base_or_self()->
is_traditional_scalar_type() ||
item->type_handler() == type_handler());
return Data_type_compatibility::OK;
}
void hash_not_null(Hasher *hasher) override
{
FbtImpl::hash_record(ptr, hasher);
}
SEL_ARG *get_mm_leaf(RANGE_OPT_PARAM *prm, KEY_PART *key_part,
const Item_bool_func *cond,
scalar_comparison_op op, Item *value) override
{
DBUG_ENTER("Field_fbt::get_mm_leaf");
if (can_optimize_scalar_range(prm, key_part, cond, op, value) !=
Data_type_compatibility::OK)
DBUG_RETURN(0);
int err= value->save_in_field_no_warnings(this, 1);
if ((op != SCALAR_CMP_EQUAL && is_real_null()) || err < 0)
DBUG_RETURN(&null_element);
if (err > 0)
{
if (op == SCALAR_CMP_EQ || op == SCALAR_CMP_EQUAL)
DBUG_RETURN(new (prm->mem_root) SEL_ARG_IMPOSSIBLE(this));
DBUG_RETURN(NULL); /* Cannot infer anything */
}
DBUG_RETURN(stored_field_make_mm_leaf(prm, key_part, op, value));
}
Data_type_compatibility can_optimize_hash_join(const Item_bool_func *cond,
const Item *item)
const override
{
return can_optimize_keypart_ref(cond, item);
}
Data_type_compatibility can_optimize_group_min_max(
const Item_bool_func *cond,
const Item *const_item) const override
{
return Data_type_compatibility::OK;
}
uint row_pack_length() const override { return pack_length(); }
Binlog_type_info binlog_type_info() const override
{
DBUG_ASSERT(type() == binlog_type());
return Binlog_type_info_fixed_string(Field_fbt::binlog_type(),
FbtImpl::binary_length(), &my_charset_bin);
}
uchar *pack(uchar *to, const uchar *from, uint max_length) override
{
DBUG_PRINT("debug", ("Packing field '%s'", field_name.str));
return FbtImpl::pack(to, from, max_length);
}
const uchar *unpack(uchar *to, const uchar *from, const uchar *from_end,
uint param_data) override
{
return FbtImpl::unpack(to, from, from_end, param_data);
}
uint max_packed_col_length(uint max_length) override
{
return StringPack::max_packed_col_length(max_length);
}
uint packed_col_length(const uchar *fbt_ptr, uint length) override
{
return StringPack::packed_col_length(fbt_ptr, length);
}
uint size_of() const override { return sizeof(*this); }
};
class cmp_item_fbt: public cmp_item_scalar
{
Fbt m_native;
public:
cmp_item_fbt()
:cmp_item_scalar(),
m_native(Fbt::zero())
{ }
void store_value(Item *item) override
{
m_native= Fbt(item, &m_null_value);
}
int cmp_not_null(const Value *val) override
{
DBUG_ASSERT(!val->is_null());
DBUG_ASSERT(val->is_string());
Fbt_null tmp(val->m_string);
DBUG_ASSERT(!tmp.is_null());
return m_native.cmp(tmp);
}
int cmp(Item *arg) override
{
Fbt_null tmp(arg);
return m_null_value || tmp.is_null() ? UNKNOWN : m_native.cmp(tmp) != 0;
}
int compare(cmp_item *ci) override
{
cmp_item_fbt *tmp= static_cast<cmp_item_fbt*>(ci);
DBUG_ASSERT(!m_null_value);
DBUG_ASSERT(!tmp->m_null_value);
return m_native.cmp(tmp->m_native);
}
cmp_item *make_same(THD *thd) override
{
return new (thd->mem_root) cmp_item_fbt();
}
};
class in_fbt :public in_vector
{
Fbt m_value;
static int cmp_fbt(void *cmp_arg, Fbt *a, Fbt *b)
{
return a->cmp(*b);
}
public:
in_fbt(THD *thd, uint elements)
:in_vector(thd, elements, sizeof(Fbt), (qsort2_cmp) cmp_fbt, 0),
m_value(Fbt::zero())
{ }
const Type_handler *type_handler() const override
{
return singleton();
}
bool set(uint pos, Item *item) override
{
Fbt *buff= &((Fbt *) base)[pos];
Fbt_null value(item);
if (value.is_null())
{
*buff= Fbt::zero();
return true;
}
*buff= value;
return false;
}
uchar *get_value(Item *item) override
{
Fbt_null value(item);
if (value.is_null())
return 0;
m_value= value;
return (uchar *) &m_value;
}
Item* create_item(THD *thd) override
{
return new (thd->mem_root) Item_literal_fbt(thd);
}
void value_to_item(uint pos, Item *item) override
{
const Fbt &buff= (((Fbt*) base)[pos]);
static_cast<Item_literal_fbt*>(item)->set_value(buff);
}
};
class Item_copy_fbt: public Item_copy
{
NativeBuffer<Fbt::binary_length()+1> m_value;
public:
Item_copy_fbt(THD *thd, Item *item_arg): Item_copy(thd, item_arg) {}
bool val_native(THD *thd, Native *to) override
{
if (null_value)
return true;
return to->copy(m_value.ptr(), m_value.length());
}
String *val_str(String *to) override
{
if (null_value)
return NULL;
Fbt_null tmp(m_value.ptr(), m_value.length());
return tmp.is_null() || tmp.to_string(to) ? NULL : to;
}
my_decimal *val_decimal(my_decimal *to) override
{
my_decimal_set_zero(to);
return to;
}
double val_real() override
{
return 0;
}
longlong val_int() override
{
return 0;
}
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
return null_value;
}
void copy() override
{
null_value= item->val_native(current_thd, &m_value);
DBUG_ASSERT(null_value == item->null_value);
}
int save_in_field(Field *field, bool no_conversions) override
{
return Item::save_in_field(field, no_conversions);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_copy_fbt>(thd, this); }
Item *do_build_clone(THD *thd) const override { return get_copy(thd); }
};
class Item_char_typecast_func_handler_fbt_to_binary:
public Item_handled_func::Handler_str
{
public:
const Type_handler *return_type_handler(const Item_handled_func *item)
const override
{
if (item->max_length > MAX_FIELD_VARCHARLENGTH)
return Type_handler::blob_type_handler(item->max_length);
if (item->max_length > 255)
return &type_handler_varchar;
return &type_handler_string;
}
bool fix_length_and_dec(Item_handled_func *xitem) const override
{
return false;
}
String *val_str(Item_handled_func *item, String *to) const override
{
DBUG_ASSERT(dynamic_cast<const Item_char_typecast*>(item));
return static_cast<Item_char_typecast*>(item)->
val_str_binary_from_native(to);
}
};
class Item_typecast_fbt: public Item_func
{
public:
Item_typecast_fbt(THD *thd, Item *a) :Item_func(thd, a) {}
const Type_handler *type_handler() const override
{ return singleton(); }
enum Functype functype() const override { return CHAR_TYPECAST_FUNC; }
bool eq(const Item *item, bool binary_cmp) const override
{
if (this == item)
return true;
if (item->type() != FUNC_ITEM ||
functype() != ((Item_func*)item)->functype())
return false;
if (type_handler() != item->type_handler())
return false;
Item_typecast_fbt *cast= (Item_typecast_fbt*) item;
return args[0]->eq(cast->args[0], binary_cmp);
}
LEX_CSTRING func_name_cstring() const override
{
static Name name= singleton()->name();
size_t len= 9+name.length()+1;
char *buf= (char*)current_thd->alloc(len);
strmov(strmov(buf, "cast_as_"), name.ptr());
return { buf, len };
}
void print(String *str, enum_query_type query_type) override
{
str->append(STRING_WITH_LEN("cast("));
args[0]->print(str, query_type);
str->append(STRING_WITH_LEN(" as "));
str->append(singleton()->name().lex_cstring());
str->append(')');
}
bool fix_length_and_dec() override
{
Type_std_attributes::operator=(Type_std_attributes_fbt());
if (Fbt::fix_fields_maybe_null_on_conversion_to_fbt(args[0]))
set_maybe_null();
return false;
}
String *val_str(String *to) override
{
Fbt_null tmp(args[0]);
return (null_value= tmp.is_null() || tmp.to_string(to)) ? NULL : to;
}
longlong val_int() override
{
return 0;
}
double val_real() override
{
return 0;
}
my_decimal *val_decimal(my_decimal *to) override
{
my_decimal_set_zero(to);
return to;
}
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
return false;
}
bool val_native(THD *thd, Native *to) override
{
Fbt_null tmp(args[0]);
return null_value= tmp.is_null() || tmp.to_native(to);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_typecast_fbt>(thd, this); }
};
class Item_cache_fbt: public Item_cache
{
NativeBuffer<FbtImpl::binary_length()+1> m_value;
public:
Item_cache_fbt(THD *thd)
:Item_cache(thd, singleton()) { }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_cache_fbt>(thd, this); }
Item *do_build_clone(THD *thd) const override { return get_copy(thd); }
bool cache_value() override
{
if (!example)
return false;
value_cached= true;
null_value_inside= null_value=
example->val_native_with_conversion_result(current_thd,
&m_value, type_handler());
return true;
}
String* val_str(String *to) override
{
if (!has_value())
return NULL;
Fbt_null tmp(m_value.ptr(), m_value.length());
return tmp.is_null() || tmp.to_string(to) ? NULL : to;
}
my_decimal *val_decimal(my_decimal *to) override
{
if (!has_value())
return NULL;
my_decimal_set_zero(to);
return to;
}
longlong val_int() override
{
if (!has_value())
return 0;
return 0;
}
double val_real() override
{
if (!has_value())
return 0;
return 0;
}
longlong val_datetime_packed(THD *) override
{
DBUG_ASSERT(0);
if (!has_value())
return 0;
return 0;
}
longlong val_time_packed(THD *) override
{
DBUG_ASSERT(0);
if (!has_value())
return 0;
return 0;
}
bool get_date(THD *, MYSQL_TIME *ltime, date_mode_t) override
{
if (!has_value())
return true;
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
return false;
}
bool val_native(THD *, Native *to) override
{
if (!has_value())
return true;
return to->copy(m_value.ptr(), m_value.length());
}
};
/* =[ methods ]=============================================== */
private:
bool character_or_binary_string_to_native(THD *thd, const String *str,
Native *to) const
{
if (str->charset() == &my_charset_bin)
{
// Convert from a binary string
if (str->length() != FbtImpl::binary_length() ||
to->copy(str->ptr(), str->length()))
{
thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
name().ptr(), ErrConvString(str).ptr());
return true;
}
return false;
}
// Convert from a character string
Fbt_null tmp(*str);
if (tmp.is_null())
thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
name().ptr(), ErrConvString(str).ptr());
return tmp.is_null() || tmp.to_native(to);
}
public:
~Type_handler_fbt() override {}
const Type_collection *type_collection() const override
{
return TypeCollectionImpl::singleton();
}
const Name &default_value() const override
{
return FbtImpl::default_value();
}
ulong KEY_pack_flags(uint column_nr) const override
{
return FbtImpl::KEY_pack_flags(column_nr);
}
protocol_send_type_t protocol_send_type() const override
{
return PROTOCOL_SEND_STRING;
}
bool Item_append_extended_type_info(Send_field_extended_metadata *to,
const Item *item) const override
{
return to->set_data_type_name(name().lex_cstring());
}
enum_field_types field_type() const override
{
return MYSQL_TYPE_STRING;
}
Item_result result_type() const override
{
return STRING_RESULT;
}
Item_result cmp_type() const override
{
return STRING_RESULT;
}
enum_dynamic_column_type dyncol_type(const Type_all_attributes *attr)
const override
{
return DYN_COL_STRING;
}
uint32 max_display_length_for_field(const Conv_source &src) const override
{
return FbtImpl::max_char_length();
}
const Type_handler *type_handler_for_comparison() const override
{
return this;
}
int stored_field_cmp_to_item(THD *thd, Field *field, Item *item) const override
{
DBUG_ASSERT(field->type_handler() == this);
Fbt_null ni(item); // Convert Item to Fbt
if (ni.is_null())
return 0;
NativeBuffer<FbtImpl::binary_length()+1> tmp;
if (field->val_native(&tmp))
{
DBUG_ASSERT(0);
return 0;
}
return -ni.cmp(tmp);
}
CHARSET_INFO *charset_for_protocol(const Item *item) const override
{
return item->collation.collation;
}
bool is_scalar_type() const override { return true; }
bool is_val_native_ready() const override { return true; }
bool can_return_int() const override { return false; }
bool can_return_decimal() const override { return false; }
bool can_return_real() const override { return false; }
bool can_return_str() const override { return true; }
bool can_return_text() const override { return true; }
bool can_return_date() const override { return false; }
bool can_return_time() const override { return false; }
bool convert_to_binary_using_val_native() const override { return true; }
decimal_digits_t Item_time_precision(THD *thd, Item *item) const override
{
return 0;
}
decimal_digits_t Item_datetime_precision(THD *thd, Item *item) const override
{
return 0;
}
decimal_digits_t Item_decimal_scale(const Item *item) const override
{
return 0;
}
decimal_digits_t Item_decimal_precision(const Item *item) const override
{
/* This will be needed if we ever allow cast from Fbt to DECIMAL. */
return (FbtImpl::binary_length()*8+7)/10*3; // = bytes to decimal digits
}
/*
Returns how many digits a divisor adds into a division result.
See Item::divisor_precision_increment() in item.h for more comments.
*/
decimal_digits_t Item_divisor_precision_increment(const Item *) const override
{
return 0;
}
/**
Makes a temporary table Field to handle numeric aggregate functions,
e.g. SUM(DISTINCT expr), AVG(DISTINCT expr), etc.
*/
Field *make_num_distinct_aggregator_field(MEM_ROOT *, const Item *) const override
{
DBUG_ASSERT(0);
return 0;
}
Field *make_conversion_table_field(MEM_ROOT *root, TABLE *table, uint metadata,
const Field *target) const override
{
const Record_addr tmp(NULL, Bit_addr(true));
return new (table->in_use->mem_root) Field_fbt(&empty_clex_str, tmp);
}
// Fix attributes after the parser
bool Column_definition_fix_attributes(Column_definition *c) const override
{
c->length= FbtImpl::max_char_length();
return false;
}
bool Column_definition_prepare_stage1(THD *thd, MEM_ROOT *mem_root,
Column_definition *def,
handler *file, ulonglong table_flags,
const Column_derived_attributes *derived_attr)
const override
{
def->prepare_stage1_simple(&my_charset_numeric);
return false;
}
bool Column_definition_redefine_stage1(Column_definition *def,
const Column_definition *dup,
const handler *file) const override
{
def->redefine_stage1_common(dup, file);
def->set_compression_method(dup->compression_method());
def->create_length_to_internal_length_string();
return false;
}
bool Column_definition_prepare_stage2(Column_definition *def, handler *file,
ulonglong table_flags) const override
{
def->pack_flag= FIELDFLAG_BINARY;
return false;
}
bool partition_field_check(const LEX_CSTRING &field_name,
Item *item_expr) const override
{
if (item_expr->cmp_type() != STRING_RESULT)
{
my_error(ER_WRONG_TYPE_COLUMN_VALUE_ERROR, MYF(0));
return true;
}
return false;
}
bool partition_field_append_value(String *to, Item *item_expr,
CHARSET_INFO *field_cs,
partition_value_print_mode_t mode)
const override
{
StringBuffer<FbtImpl::max_char_length()+64> fbtstr;
Fbt_null fbt(item_expr);
if (fbt.is_null())
{
my_error(ER_PARTITION_FUNCTION_IS_NOT_ALLOWED, MYF(0));
return true;
}
return fbt.to_string(&fbtstr) ||
to->append('\'') ||
to->append(fbtstr) ||
to->append('\'');
}
Field *make_table_field(MEM_ROOT *root, const LEX_CSTRING *name,
const Record_addr &addr,
const Type_all_attributes &attr,
TABLE_SHARE *table) const override
{
return new (root) Field_fbt(name, addr);
}
Field * make_table_field_from_def(TABLE_SHARE *share, MEM_ROOT *mem_root,
const LEX_CSTRING *name, const Record_addr &addr,
const Bit_addr &bit,
const Column_definition_attributes *attr,
uint32 flags) const override
{
return new (mem_root) Field_fbt(name, addr);
}
void Column_definition_attributes_frm_pack(const Column_definition_attributes *def,
uchar *buff) const override
{
def->frm_pack_basic(buff);
def->frm_pack_charset(buff);
}
bool Column_definition_attributes_frm_unpack(Column_definition_attributes *def,
TABLE_SHARE *share, const uchar *buffer,
LEX_CUSTRING *gis_options)
const override
{
def->frm_unpack_basic(buffer);
return def->frm_unpack_charset(share, buffer);
}
void make_sort_key_part(uchar *to, Item *item, const SORT_FIELD_ATTR *sort_field,
String *) const override
{
DBUG_ASSERT(item->type_handler() == this);
NativeBuffer<FbtImpl::binary_length()+1> tmp;
item->val_native_result(current_thd, &tmp);
if (item->maybe_null())
{
if (item->null_value)
{
memset(to, 0, FbtImpl::binary_length() + 1);
return;
}
*to++= 1;
}
DBUG_ASSERT(!item->null_value);
DBUG_ASSERT(FbtImpl::binary_length() == tmp.length());
DBUG_ASSERT(FbtImpl::binary_length() == sort_field->length);
FbtImpl::memory_to_record((char*) to, tmp.ptr());
}
uint make_packed_sort_key_part(uchar *to, Item *item,
const SORT_FIELD_ATTR *sort_field,
String *) const override
{
DBUG_ASSERT(item->type_handler() == this);
NativeBuffer<FbtImpl::binary_length()+1> tmp;
item->val_native_result(current_thd, &tmp);
if (item->maybe_null())
{
if (item->null_value)
{
*to++=0;
return 0;
}
*to++= 1;
}
DBUG_ASSERT(!item->null_value);
DBUG_ASSERT(FbtImpl::binary_length() == tmp.length());
DBUG_ASSERT(FbtImpl::binary_length() == sort_field->length);
FbtImpl::memory_to_record((char*) to, tmp.ptr());
return tmp.length();
}
void sort_length(THD *thd, const Type_std_attributes *item,
SORT_FIELD_ATTR *attr) const override
{
attr->original_length= attr->length= FbtImpl::binary_length();
attr->suffix_length= 0;
}
uint32 max_display_length(const Item *item) const override
{
return FbtImpl::max_char_length();
}
uint32 calc_pack_length(uint32 length) const override
{
return FbtImpl::binary_length();
}
void Item_update_null_value(Item *item) const override
{
NativeBuffer<FbtImpl::binary_length()+1> tmp;
item->val_native(current_thd, &tmp);
}
bool Item_save_in_value(THD *thd, Item *item, st_value *value) const override
{
value->m_type= DYN_COL_STRING;
String *str= item->val_str(&value->m_string);
if (str != &value->m_string && !item->null_value)
{
// "item" returned a non-NULL value
if (Fbt_null(*str).is_null())
{
/*
The value was not-null, but conversion to FBT failed:
SELECT a, DECODE_ORACLE(fbtcol, 'garbage', '<NULL>', '::01', '01')
FROM t1;
*/
thd->push_warning_wrong_value(Sql_condition::WARN_LEVEL_WARN,
name().ptr(), ErrConvString(str).ptr());
value->m_type= DYN_COL_NULL;
return true;
}
// "item" returned a non-NULL value, and it was a valid FBT
value->m_string.set(str->ptr(), str->length(), str->charset());
}
return check_null(item, value);
}
void Item_param_setup_conversion(THD *thd, Item_param *param) const override
{
param->setup_conversion_string(thd, thd->variables.character_set_client);
}
void Item_param_set_param_func(Item_param *param,
uchar **pos, ulong len) const override
{
param->set_param_str(pos, len);
}
bool Item_param_set_from_value(THD *thd, Item_param *param,
const Type_all_attributes *attr,
const st_value *val) const override
{
param->unsigned_flag= false;
param->setup_conversion_string(thd, attr->collation.collation);
/*
Exact value of max_length is not known unless fbt is converted to
charset of connection, so we have to set it later.
*/
return param->set_str(val->m_string.ptr(), val->m_string.length(),
attr->collation.collation,
attr->collation.collation);
}
bool Item_param_val_native(THD *thd, Item_param *item, Native *to)
const override
{
StringBuffer<FbtImpl::max_char_length()+1> buffer;
String *str= item->val_str(&buffer);
if (!str)
return true;
Fbt_null tmp(*str);
return tmp.is_null() || tmp.to_native(to);
}
bool Item_send(Item *item, Protocol *p, st_value *buf) const override
{
return Item_send_str(item, p, buf);
}
int Item_save_in_field(Item *item, Field *field, bool no_conversions)
const override
{
if (field->type_handler() == this)
{
NativeBuffer<MAX_FIELD_WIDTH> tmp;
bool rc= item->val_native(current_thd, &tmp);
if (rc || item->null_value)
return set_field_to_null_with_conversions(field, no_conversions);
field->set_notnull();
return field->store_native(tmp);
}
return item->save_str_in_field(field, no_conversions);
}
String *print_item_value(THD *thd, Item *item, String *str) const override
{
StringBuffer<FbtImpl::max_char_length()+64> buf;
String *result= item->val_str(&buf);
/*
TODO: This should eventually use one of these notations:
1. CAST('xxx' AS Fbt)
Problem: CAST is not supported as a NAME_CONST() argument.
2. Fbt'xxx'
Problem: This syntax is not supported by the parser yet.
*/
return !result || str->realloc(result->length() + 2) ||
str->append(STRING_WITH_LEN("'")) ||
str->append(result->ptr(), result->length()) ||
str->append(STRING_WITH_LEN("'")) ? nullptr : str;
}
/**
Check if
WHERE expr=value AND expr=const
can be rewritten as:
WHERE const=value AND expr=const
"this" is the comparison handler that is used by "target".
@param target - the predicate expr=value,
whose "expr" argument will be replaced to "const".
@param target_expr - the target's "expr" which will be replaced to "const".
@param target_value - the target's second argument, it will remain unchanged.
@param source - the equality predicate expr=const (or expr<=>const)
that can be used to rewrite the "target" part
(under certain conditions, see the code).
@param source_expr - the source's "expr". It should be exactly equal to
the target's "expr" to make condition rewrite possible.
@param source_const - the source's "const" argument, it will be inserted
into "target" instead of "expr".
*/
bool can_change_cond_ref_to_const(Item_bool_func2 *target, Item *target_expr,
Item *target_value, Item_bool_func2 *source,
Item *source_expr, Item *source_const)
const override
{
/*
WHERE COALESCE(col)='xxx' AND COALESCE(col)=CONCAT(a); -->
WHERE COALESCE(col)='xxx' AND 'xxx'=CONCAT(a);
*/
return target->compare_type_handler() == source->compare_type_handler();
}
bool subquery_type_allows_materialization(const Item *inner,
const Item *outer, bool) const override
{
/*
Example:
SELECT * FROM t1 WHERE a IN (SELECT col FROM t1 GROUP BY col);
Allow materialization only if the outer column is also FBT.
This can be changed for more relaxed rules in the future.
*/
DBUG_ASSERT(inner->type_handler() == this);
return outer->type_handler() == this;
}
/**
Make a simple constant replacement item for a constant "src",
so the new item can futher be used for comparison with "cmp", e.g.:
src = cmp -> replacement = cmp
"this" is the type handler that is used to compare "src" and "cmp".
@param thd - current thread, for mem_root
@param src - The item that we want to replace. It's a const item,
but it can be complex enough to calculate on every row.
@param cmp - The src's comparand.
@retval - a pointer to the created replacement Item
@retval - NULL, if could not create a replacement (e.g. on EOM).
NULL is also returned for ROWs, because instead of replacing
a Item_row to a new Item_row, Type_handler_row just replaces
its elements.
*/
Item *make_const_item_for_comparison(THD *thd, Item *src,
const Item *cmp) const override
{
Fbt_null tmp(src);
if (tmp.is_null())
return new (thd->mem_root) Item_null(thd, src->name.str);
return new (thd->mem_root) Item_literal_fbt(thd, tmp);
}
Item_cache *Item_get_cache(THD *thd, const Item *item) const override
{
return new (thd->mem_root) Item_cache_fbt(thd);
}
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const override
{
return new (thd->mem_root) Item_typecast_fbt(thd, item);
}
Item_copy *create_item_copy(THD *thd, Item *item) const override
{
return new (thd->mem_root) Item_copy_fbt(thd, item);
}
int cmp_native(const Native &a, const Native &b) const override
{
return FbtImpl::cmp(a.to_lex_cstring(), b.to_lex_cstring());
}
bool set_comparator_func(THD *thd, Arg_comparator *cmp) const override
{
return cmp->set_cmp_func_native(thd);
}
bool Item_const_eq(const Item_const *a, const Item_const *b,
bool binary_cmp) const override
{
return false;
}
bool Item_eq_value(THD *thd, const Type_cmp_attributes *attr,
Item *a, Item *b) const override
{
Fbt_null na(a), nb(b);
return !na.is_null() && !nb.is_null() && !na.cmp(nb);
}
bool Item_bool_rowready_func2_fix_length_and_dec(THD *thd,
Item_bool_rowready_func2 *func) const override
{
if (Type_handler::Item_bool_rowready_func2_fix_length_and_dec(thd, func))
return true;
if (!func->maybe_null() &&
Fbt::fix_fields_maybe_null_on_conversion_to_fbt(func->arguments(), 2))
func->set_maybe_null();
return false;
}
bool Item_hybrid_func_fix_attributes(THD *thd, const LEX_CSTRING &name,
Type_handler_hybrid_field_type *h,
Type_all_attributes *attr,
Item **items, uint nitems) const override
{
attr->Type_std_attributes::operator=(Type_std_attributes_fbt());
h->set_handler(this);
/*
If some of the arguments cannot be safely converted to "FBT NOT NULL",
then mark the entire function nullability as NULL-able.
Otherwise, keep the generic nullability calculated by earlier stages:
- either by the most generic way in Item_func::fix_fields()
- or by Item_func_xxx::fix_length_and_dec() before the call of
Item_hybrid_func_fix_attributes()
IFNULL() is special. It does not need to test args[0].
*/
uint first= dynamic_cast<Item_func_ifnull*>(attr) ? 1 : 0;
for (uint i= first; i < nitems; i++)
{
if (Fbt::fix_fields_maybe_null_on_conversion_to_fbt(items[i]))
{
attr->set_type_maybe_null(true);
break;
}
}
return false;
}
bool Item_func_min_max_fix_attributes(THD *thd, Item_func_min_max *func,
Item **items, uint nitems) const override
{
return Item_hybrid_func_fix_attributes(thd, func->func_name_cstring(),
func, func, items, nitems);
}
bool Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const override
{
func->Type_std_attributes::operator=(Type_std_attributes_fbt());
func->set_handler(this);
return false;
}
bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_val_native_with_conversion(THD *thd, Item *item,
Native *to) const override
{
if (item->type_handler() == this)
return item->val_native(thd, to); // No conversion needed
StringBuffer<FbtImpl::max_char_length()+1> buffer;
String *str= item->val_str(&buffer);
return str ? character_or_binary_string_to_native(thd, str, to) : true;
}
bool Item_val_native_with_conversion_result(THD *thd, Item *item,
Native *to) const override
{
if (item->type_handler() == this)
return item->val_native_result(thd, to); // No conversion needed
StringBuffer<FbtImpl::max_char_length()+1> buffer;
String *str= item->str_result(&buffer);
return str ? character_or_binary_string_to_native(thd, str, to) : true;
}
bool Item_val_bool(Item *item) const override
{
NativeBuffer<FbtImpl::binary_length()+1> tmp;
if (item->val_native(current_thd, &tmp))
return false;
return !Fbt::only_zero_bytes(tmp.ptr(), tmp.length());
}
void Item_get_date(THD *thd, Item *item, Temporal::Warn *buff,
MYSQL_TIME *ltime, date_mode_t fuzzydate) const override
{
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
}
longlong Item_val_int_signed_typecast(Item *item) const override
{
DBUG_ASSERT(0);
return 0;
}
longlong Item_val_int_unsigned_typecast(Item *item) const override
{
DBUG_ASSERT(0);
return 0;
}
String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str)
const override
{
NativeBuffer<FbtImpl::binary_length()+1> tmp;
if ((item->null_value= item->arguments()[0]->val_native(current_thd, &tmp)))
return nullptr;
DBUG_ASSERT(tmp.length() == FbtImpl::binary_length());
if (str->set_hex(tmp.ptr(), tmp.length()))
{
str->length(0);
str->set_charset(item->collation.collation);
}
return str;
}
String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *item,
String *str) const override
{
NativeBuffer<FbtImpl::binary_length()+1> native;
if (item->val_native(current_thd, &native))
{
DBUG_ASSERT(item->null_value);
return nullptr;
}
DBUG_ASSERT(native.length() == FbtImpl::binary_length());
Fbt_null tmp(native.ptr(), native.length());
return tmp.is_null() || tmp.to_string(str) ? nullptr : str;
}
double Item_func_hybrid_field_type_val_real(Item_func_hybrid_field_type *)
const override
{
return 0;
}
longlong Item_func_hybrid_field_type_val_int(Item_func_hybrid_field_type *)
const override
{
return 0;
}
my_decimal *
Item_func_hybrid_field_type_val_decimal(Item_func_hybrid_field_type *,
my_decimal *to) const override
{
my_decimal_set_zero(to);
return to;
}
void Item_func_hybrid_field_type_get_date(THD *,
Item_func_hybrid_field_type *,
Temporal::Warn *,
MYSQL_TIME *to,
date_mode_t fuzzydate)
const override
{
set_zero_time(to, MYSQL_TIMESTAMP_TIME);
}
// WHERE is Item_func_min_max_val_native???
String *Item_func_min_max_val_str(Item_func_min_max *func, String *str)
const override
{
Fbt_null tmp(func);
return tmp.is_null() || tmp.to_string(str) ? nullptr : str;
}
double Item_func_min_max_val_real(Item_func_min_max *) const override
{
return 0;
}
longlong Item_func_min_max_val_int(Item_func_min_max *) const override
{
return 0;
}
my_decimal *Item_func_min_max_val_decimal(Item_func_min_max *,
my_decimal *to) const override
{
my_decimal_set_zero(to);
return to;
}
bool Item_func_min_max_get_date(THD *thd, Item_func_min_max*, MYSQL_TIME *to,
date_mode_t fuzzydate) const override
{
set_zero_time(to, MYSQL_TIMESTAMP_TIME);
return false;
}
bool Item_func_between_fix_length_and_dec(Item_func_between *func) const override
{
if (!func->maybe_null() &&
Fbt::fix_fields_maybe_null_on_conversion_to_fbt(func->arguments(), 3))
func->set_maybe_null();
return false;
}
longlong Item_func_between_val_int(Item_func_between *func) const override
{
return func->val_int_cmp_native();
}
cmp_item *make_cmp_item(THD *thd, CHARSET_INFO *cs) const override
{
return new (thd->mem_root) cmp_item_fbt;
}
in_vector *make_in_vector(THD *thd, const Item_func_in *func,
uint nargs) const override
{
return new (thd->mem_root) in_fbt(thd, nargs);
}
bool Item_func_in_fix_comparator_compatible_types(THD *thd,
Item_func_in *func)
const override
{
if (!func->maybe_null() &&
Fbt::fix_fields_maybe_null_on_conversion_to_fbt(func->arguments(),
func->argument_count()))
func->set_maybe_null();
if (func->compatible_types_scalar_bisection_possible())
{
return func->value_list_convert_const_to_int(thd) ||
func->fix_for_scalar_comparison_using_bisection(thd);
}
return
func->fix_for_scalar_comparison_using_cmp_items(thd,
1U << (uint) STRING_RESULT);
}
bool Item_func_round_fix_length_and_dec(Item_func_round *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_func_int_val_fix_length_and_dec(Item_func_int_val *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_func_abs_fix_length_and_dec(Item_func_abs *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_func_neg_fix_length_and_dec(Item_func_neg *func) const override
{
return Item_func_or_sum_illegal_param(func);
}
bool Item_func_signed_fix_length_and_dec(Item_func_signed *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_unsigned_fix_length_and_dec(Item_func_unsigned *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_double_typecast_fix_length_and_dec(Item_double_typecast *item)
const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_float_typecast_fix_length_and_dec(Item_float_typecast *item)
const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_decimal_typecast_fix_length_and_dec(Item_decimal_typecast *item)
const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_char_typecast_fix_length_and_dec(Item_char_typecast *item)
const override
{
if (item->cast_charset() == &my_charset_bin)
{
static Item_char_typecast_func_handler_fbt_to_binary
item_char_typecast_func_handler_fbt_to_binary;
item->fix_length_and_dec_native_to_binary(FbtImpl::binary_length());
item->set_func_handler(&item_char_typecast_func_handler_fbt_to_binary);
return false;
}
item->fix_length_and_dec_str();
return false;
}
bool Item_time_typecast_fix_length_and_dec(Item_time_typecast *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_date_typecast_fix_length_and_dec(Item_date_typecast *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_datetime_typecast_fix_length_and_dec(Item_datetime_typecast *item)
const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_plus_fix_length_and_dec(Item_func_plus *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_minus_fix_length_and_dec(Item_func_minus *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_mul_fix_length_and_dec(Item_func_mul *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_div_fix_length_and_dec(Item_func_div *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
bool Item_func_mod_fix_length_and_dec(Item_func_mod *item) const override
{
return Item_func_or_sum_illegal_param(item);
}
static Type_handler_fbt *singleton()
{
static Type_handler_fbt th;
return &th;
}
};
template<class FbtImpl>
class Type_collection_fbt: public Type_collection
{
const Type_handler *aggregate_common(const Type_handler *a,
const Type_handler *b) const
{
if (a == b)
return a;
return NULL;
}
const Type_handler *aggregate_if_string(const Type_handler *a,
const Type_handler *b) const
{
static const Type_aggregator::Pair agg[]=
{
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_null, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_varchar, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_string, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_tiny_blob, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_blob, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_medium_blob, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_long_blob, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_hex_hybrid, Type_handler_fbt<FbtImpl>::singleton()},
{NULL,NULL,NULL}
};
return Type_aggregator::find_handler_in_array(agg, a, b, true);
}
public:
const Type_handler *aggregate_for_result(const Type_handler *a,
const Type_handler *b)
const override
{
const Type_handler *h;
if ((h= aggregate_common(a, b)) || (h= aggregate_if_string(a, b)))
return h;
return NULL;
}
const Type_handler *aggregate_for_min_max(const Type_handler *a,
const Type_handler *b)
const override
{
return aggregate_for_result(a, b);
}
const Type_handler *aggregate_for_comparison(const Type_handler *a,
const Type_handler *b)
const override
{
if (const Type_handler *h= aggregate_common(a, b))
return h;
static const Type_aggregator::Pair agg[]=
{
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_null, Type_handler_fbt<FbtImpl>::singleton()},
{Type_handler_fbt<FbtImpl>::singleton(), &type_handler_long_blob, Type_handler_fbt<FbtImpl>::singleton()},
{NULL,NULL,NULL}
};
return Type_aggregator::find_handler_in_array(agg, a, b, true);
}
const Type_handler *aggregate_for_num_op(const Type_handler *a,
const Type_handler *b)
const override
{
return NULL;
}
static Type_collection_fbt *singleton()
{
static Type_collection_fbt tc;
return &tc;
}
};
#endif /* SQL_TYPE_FIXEDBIN_H */