Mini Shell
#ifndef ITEM_STRFUNC_INCLUDED
#define ITEM_STRFUNC_INCLUDED
/*
Copyright (c) 2000, 2011, Oracle and/or its affiliates.
Copyright (c) 2009, 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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
/* This file defines all string functions */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
extern size_t username_char_length;
class Item_str_func :public Item_func
{
protected:
/**
Sets the result value of the function an empty string, using the current
character set. No memory is allocated.
@retval A pointer to the str_value member.
*/
virtual String *make_empty_result(String *str)
{
/*
Reset string length to an empty string. We don't use str_value.set() as
we don't want to free and potentially have to reallocate the buffer
for each call.
*/
if (!str->is_alloced())
str->set("", 0, collation.collation); /* Avoid null ptrs */
else
{
str->length(0); /* Reuse allocated area */
str->set_charset(collation.collation);
}
return str;
}
public:
Item_str_func(THD *thd): Item_func(thd) { decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, Item *a): Item_func(thd, a) {decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, Item *a, Item *b):
Item_func(thd, a, b) { decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, Item *a, Item *b, Item *c):
Item_func(thd, a, b, c) { decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d):
Item_func(thd, a, b, c, d) { decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d, Item* e):
Item_func(thd, a, b, c, d, e) { decimals=NOT_FIXED_DEC; }
Item_str_func(THD *thd, List<Item> &list):
Item_func(thd, list) { decimals=NOT_FIXED_DEC; }
longlong val_int() override;
double val_real() override;
my_decimal *val_decimal(my_decimal *) override;
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{ return get_date_from_string(thd, ltime, fuzzydate); }
const Type_handler *type_handler() const override
{ return string_type_handler(); }
void left_right_max_length();
bool fix_fields(THD *thd, Item **ref) override;
};
/*
Functions that return values with ASCII repertoire
*/
class Item_str_ascii_func :public Item_str_func
{
String ascii_buf;
public:
Item_str_ascii_func(THD *thd): Item_str_func(thd) {}
Item_str_ascii_func(THD *thd, Item *a): Item_str_func(thd, a) {}
Item_str_ascii_func(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
Item_str_ascii_func(THD *thd, Item *a, Item *b, Item *c):
Item_str_func(thd, a, b, c) {}
String *val_str(String *str) override
{
return val_str_from_val_str_ascii(str, &ascii_buf);
}
String *val_str_ascii(String *) override= 0;
};
/**
Functions that return a checksum or a hash of the argument,
or somehow else encode or decode the argument,
returning an ASCII-repertoire string.
*/
class Item_str_ascii_checksum_func: public Item_str_ascii_func
{
public:
Item_str_ascii_checksum_func(THD *thd, Item *a)
:Item_str_ascii_func(thd, a) { }
Item_str_ascii_checksum_func(THD *thd, Item *a, Item *b)
:Item_str_ascii_func(thd, a, b) { }
bool eq(const Item *item, bool binary_cmp) const override
{
// Always use binary argument comparison: MD5('x') != MD5('X')
return Item_func::eq(item, true);
}
};
/**
Functions that return a checksum or a hash of the argument,
or somehow else encode or decode the argument,
returning a binary string.
*/
class Item_str_binary_checksum_func: public Item_str_func
{
public:
Item_str_binary_checksum_func(THD *thd, Item *a)
:Item_str_func(thd, a) { }
Item_str_binary_checksum_func(THD *thd, Item *a, Item *b)
:Item_str_func(thd, a, b) { }
bool eq(const Item *item, bool binary_cmp) const override
{
/*
Always use binary argument comparison:
FROM_BASE64('test') != FROM_BASE64('TEST')
*/
return Item_func::eq(item, true);
}
};
class Item_func_md5 :public Item_str_ascii_checksum_func
{
public:
Item_func_md5(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override
{
fix_length_and_charset(32, default_charset());
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("md5") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_md5>(thd, this); }
};
class Item_func_sha :public Item_str_ascii_checksum_func
{
public:
Item_func_sha(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("sha") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_sha>(thd, this); }
};
class Item_func_sha2 :public Item_str_ascii_checksum_func
{
public:
Item_func_sha2(THD *thd, Item *a, Item *b)
:Item_str_ascii_checksum_func(thd, a, b) {}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("sha2") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_sha2>(thd, this); }
};
class Item_func_to_base64 :public Item_str_ascii_checksum_func
{
String tmp_value;
public:
Item_func_to_base64(THD *thd, Item *a)
:Item_str_ascii_checksum_func(thd, a) {}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("to_base64") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_to_base64>(thd, this); }
};
class Item_func_from_base64 :public Item_str_binary_checksum_func
{
String tmp_value;
public:
Item_func_from_base64(THD *thd, Item *a)
:Item_str_binary_checksum_func(thd, a) { }
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("from_base64") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_from_base64>(thd, this); }
};
#include <my_crypt.h>
class Item_aes_crypt :public Item_str_binary_checksum_func
{
enum { AES_KEY_LENGTH = 128 };
void create_key(String *user_key, uchar* key);
protected:
int what;
String tmp_value;
public:
Item_aes_crypt(THD *thd, Item *a, Item *b)
:Item_str_binary_checksum_func(thd, a, b) {}
String *val_str(String *) override;
};
class Item_func_aes_encrypt :public Item_aes_crypt
{
public:
Item_func_aes_encrypt(THD *thd, Item *a, Item *b)
:Item_aes_crypt(thd, a, b) {}
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("aes_encrypt") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_aes_encrypt>(thd, this); }
};
class Item_func_aes_decrypt :public Item_aes_crypt
{
public:
Item_func_aes_decrypt(THD *thd, Item *a, Item *b):
Item_aes_crypt(thd, a, b) {}
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("aes_decrypt") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_aes_decrypt>(thd, this); }
};
class Item_func_natural_sort_key : public Item_str_func
{
public:
Item_func_natural_sort_key(THD *thd, Item *a)
: Item_str_func(thd, a){};
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("natural_sort_key")};
return name;
}
bool fix_length_and_dec(THD *thd) override;
Item *do_get_copy(THD *thd) const override
{
return get_item_copy<Item_func_natural_sort_key>(thd, this);
}
bool check_vcol_func_processor(void *arg) override;
};
class Item_func_concat :public Item_str_func
{
protected:
String tmp_value;
/*
Append a non-NULL value to the result.
@param [IN] thd - The current thread.
@param [IN/OUT] res - The current val_str() return value.
@param [IN] app - The value to be appended.
@retval - false on success, true on error
*/
bool append_value(THD *thd, String *res, const String *app);
bool realloc_result(String *str, uint length) const;
public:
Item_func_concat(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
Item_func_concat(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("concat") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_concat>(thd, this); }
};
/*
This class handles the || operator in sql_mode=ORACLE.
Unlike the traditional MariaDB concat(), it treats NULL arguments as ''.
*/
class Item_func_concat_operator_oracle :public Item_func_concat
{
public:
Item_func_concat_operator_oracle(THD *thd, List<Item> &list)
:Item_func_concat(thd, list)
{ }
Item_func_concat_operator_oracle(THD *thd, Item *a, Item *b)
:Item_func_concat(thd, a, b)
{ }
String *val_str(String *) override;
const Schema *schema() const override { return &oracle_schema_ref; }
void print(String *str, enum_query_type query_type) override
{
if (query_type & QT_FOR_FRM)
{
// 10.3 downgrade compatibility for FRM
str->append(STRING_WITH_LEN("concat_operator_oracle"));
}
else
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
Item *do_get_copy(THD *thd) const override
{
return get_item_copy<Item_func_concat_operator_oracle>(thd, this);
}
};
class Item_func_decode_histogram :public Item_str_func
{
public:
Item_func_decode_histogram(THD *thd, Item *a, Item *b):
Item_str_func(thd, a, b) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
collation.set(system_charset_info);
max_length= MAX_BLOB_WIDTH;
set_maybe_null();
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("decode_histogram") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_decode_histogram>(thd, this); }
};
class Item_func_concat_ws :public Item_str_func
{
String tmp_value;
public:
Item_func_concat_ws(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("concat_ws") };
return name;
}
table_map not_null_tables() const override { return 0; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_concat_ws>(thd, this); }
};
class Item_func_random_bytes : public Item_str_func
{
public:
Item_func_random_bytes(THD *thd, Item *arg1) : Item_str_func(thd, arg1) {}
bool fix_length_and_dec(THD *thd) override;
void update_used_tables() override;
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("random_bytes")};
return name;
}
bool check_vcol_func_processor(void *arg) override
{
return mark_unsupported_function(func_name(), "()", arg,
VCOL_NON_DETERMINISTIC | VCOL_NEXTVAL);
}
Item *do_get_copy(THD *thd) const override
{
return get_item_copy<Item_func_random_bytes>(thd, this);
}
static const int MAX_RANDOM_BYTES= 1024;
};
class Item_func_reverse :public Item_str_func
{
String tmp_value;
public:
Item_func_reverse(THD *thd, Item *a): Item_str_func(thd, a) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("reverse") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_reverse>(thd, this); }
};
class Item_func_replace :public Item_str_func
{
String tmp_value,tmp_value2;
protected:
String *val_str_internal(String *str, bool null_to_empty);
public:
Item_func_replace(THD *thd, Item *org, Item *find, Item *replace):
Item_str_func(thd, org, find, replace) {}
String *val_str(String *to) override { return val_str_internal(to, false); };
bool fix_length_and_dec(THD *thd) override;
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("replace") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_replace>(thd, this); }
};
class Item_func_replace_oracle :public Item_func_replace
{
String tmp_emtpystr;
public:
Item_func_replace_oracle(THD *thd, Item *org, Item *find, Item *replace):
Item_func_replace(thd, org, find, replace) {}
String *val_str(String *to) override
{ return val_str_internal(to, true); };
const Schema *schema() const override { return &oracle_schema_ref; }
void print(String *str, enum_query_type query_type) override
{
if (query_type & QT_FOR_FRM)
{
// 10.3 downgrade compatibility for FRM
str->append(STRING_WITH_LEN("replace_oracle"));
}
else
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_replace_oracle>(thd, this); }
};
class Item_func_regexp_replace :public Item_str_func
{
Regexp_processor_pcre re;
bool append_replacement(String *str,
const LEX_CSTRING *source,
const LEX_CSTRING *replace);
protected:
String *val_str_internal(String *str, bool null_to_empty);
public:
Item_func_regexp_replace(THD *thd, Item *a, Item *b, Item *c):
Item_str_func(thd, a, b, c)
{}
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
void cleanup() override
{
DBUG_ENTER("Item_func_regexp_replace::cleanup");
Item_str_func::cleanup();
re.cleanup();
DBUG_VOID_RETURN;
}
String *val_str(String *str) override
{
return val_str_internal(str, false);
}
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("regexp_replace") };
return name;
}
Item *do_get_copy(THD *thd) const override { return 0;}
};
class Item_func_regexp_replace_oracle: public Item_func_regexp_replace
{
public:
Item_func_regexp_replace_oracle(THD *thd, Item *a, Item *b, Item *c)
:Item_func_regexp_replace(thd, a, b, c)
{}
const Schema *schema() const override { return &oracle_schema_ref; }
bool fix_length_and_dec(THD *thd) override
{
bool rc= Item_func_regexp_replace::fix_length_and_dec(thd);
set_maybe_null(); // Empty result is converted to NULL
return rc;
}
String *val_str(String *str) override
{
return val_str_internal(str, true);
}
};
class Item_func_regexp_substr :public Item_str_func
{
Regexp_processor_pcre re;
public:
Item_func_regexp_substr(THD *thd, Item *a, Item *b):
Item_str_func(thd, a, b)
{}
void cleanup() override
{
DBUG_ENTER("Item_func_regexp_substr::cleanup");
Item_str_func::cleanup();
re.cleanup();
DBUG_VOID_RETURN;
}
String *val_str(String *str) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("regexp_substr") };
return name;
}
Item *do_get_copy(THD *thd) const override { return 0; }
};
class Item_func_insert :public Item_str_func
{
String tmp_value;
public:
Item_func_insert(THD *thd, Item *org, Item *start, Item *length,
Item *new_str):
Item_str_func(thd, org, start, length, new_str) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("insert") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_insert>(thd, this); }
};
class Item_str_conv :public Item_str_func
{
protected:
uint multiply;
my_charset_conv_case converter;
String tmp_value;
public:
Item_str_conv(THD *thd, Item *item): Item_str_func(thd, item) {}
String *val_str(String *) override;
};
class Item_func_lcase :public Item_str_conv
{
public:
Item_func_lcase(THD *thd, Item *item): Item_str_conv(thd, item) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("lcase") };
return name;
}
bool fix_length_and_dec(THD *thd) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_lcase>(thd, this); }
};
class Item_func_ucase :public Item_str_conv
{
public:
Item_func_ucase(THD *thd, Item *item): Item_str_conv(thd, item) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("ucase") };
return name;
}
bool fix_length_and_dec(THD *thd) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_ucase>(thd, this); }
};
class Item_func_left :public Item_str_func
{
String tmp_value;
public:
Item_func_left(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
bool hash_not_null(Hasher *hasher) override;
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("left") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_left>(thd, this); }
};
class Item_func_right :public Item_str_func
{
String tmp_value;
public:
Item_func_right(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("right") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_right>(thd, this); }
};
class Item_func_substr :public Item_str_func
{
String tmp_value;
protected:
virtual longlong get_position() { return args[1]->val_int(); }
public:
Item_func_substr(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
Item_func_substr(THD *thd, Item *a, Item *b, Item *c):
Item_str_func(thd, a, b, c) {}
Item_func_substr(THD *thd, List<Item> &list)
:Item_str_func(thd, list) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("substr") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_substr>(thd, this); }
};
class Item_func_sformat :public Item_str_func
{
String *val_arg;
public:
Item_func_sformat(THD *thd, List<Item> &list);
~Item_func_sformat() { delete [] val_arg; }
String *val_str(String*) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("sformat") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_sformat>(thd, this); }
};
class Item_func_substr_oracle :public Item_func_substr
{
protected:
longlong get_position() override
{ longlong pos= args[1]->val_int(); return pos == 0 ? 1 : pos; }
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_substr_oracle(THD *thd, Item *a, Item *b):
Item_func_substr(thd, a, b) {}
Item_func_substr_oracle(THD *thd, Item *a, Item *b, Item *c):
Item_func_substr(thd, a, b, c) {}
Item_func_substr_oracle(THD *thd, List<Item> &list)
:Item_func_substr(thd, list) {}
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_substr::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
const Schema *schema() const override { return &oracle_schema_ref; }
void print(String *str, enum_query_type query_type) override
{
if (query_type & QT_FOR_FRM)
{
// 10.3 downgrade compatibility for FRM
str->append(STRING_WITH_LEN("substr_oracle"));
}
else
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_substr_oracle>(thd, this); }
};
class Item_func_substr_index :public Item_str_func
{
String tmp_value;
public:
Item_func_substr_index(THD *thd, Item *a,Item *b,Item *c):
Item_str_func(thd, a, b, c) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("substring_index") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_substr_index>(thd, this); }
};
class Item_func_trim :public Item_str_func
{
protected:
String tmp_value;
String remove;
String *trimmed_value(String *res, uint32 offset, uint32 length)
{
if (length == 0)
return make_empty_result(&tmp_value);
tmp_value.set(*res, offset, length);
/*
Make sure to return correct charset and collation:
TRIM(0x000000 FROM _ucs2 0x0061)
should set charset to "binary" rather than to "ucs2".
*/
tmp_value.set_charset(collation.collation);
return &tmp_value;
}
String *non_trimmed_value(String *res)
{
return trimmed_value(res, 0, res->length());
}
public:
Item_func_trim(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
Item_func_trim(THD *thd, Item *a): Item_str_func(thd, a) {}
Sql_mode_dependency value_depends_on_sql_mode() const override;
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
const Schema *schema() const override { return &mariadb_schema; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("trim") };
return name;
}
void print(String *str, enum_query_type query_type) override;
virtual LEX_CSTRING mode_name() const { return { "both", 4}; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_trim>(thd, this); }
};
class Item_func_trim_oracle :public Item_func_trim
{
protected:
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_trim_oracle(THD *thd, Item *a, Item *b):
Item_func_trim(thd, a, b) {}
Item_func_trim_oracle(THD *thd, Item *a): Item_func_trim(thd, a) {}
const Schema *schema() const override { return &oracle_schema_ref; }
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_trim::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_trim_oracle>(thd, this); }
};
class Item_func_ltrim :public Item_func_trim
{
public:
Item_func_ltrim(THD *thd, Item *a, Item *b): Item_func_trim(thd, a, b) {}
Item_func_ltrim(THD *thd, Item *a): Item_func_trim(thd, a) {}
Sql_mode_dependency value_depends_on_sql_mode() const override
{
return Item_func::value_depends_on_sql_mode();
}
String *val_str(String *) override;
const Schema *schema() const override { return &mariadb_schema; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("ltrim") };
return name;
}
LEX_CSTRING mode_name() const override
{ return { STRING_WITH_LEN("leading") }; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_ltrim>(thd, this); }
};
class Item_func_ltrim_oracle :public Item_func_ltrim
{
protected:
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_ltrim_oracle(THD *thd, Item *a, Item *b):
Item_func_ltrim(thd, a, b) {}
Item_func_ltrim_oracle(THD *thd, Item *a): Item_func_ltrim(thd, a) {}
const Schema *schema() const override { return &oracle_schema_ref; }
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_ltrim::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_ltrim_oracle>(thd, this); }
};
class Item_func_rtrim :public Item_func_trim
{
public:
Item_func_rtrim(THD *thd, Item *a, Item *b): Item_func_trim(thd, a, b) {}
Item_func_rtrim(THD *thd, Item *a): Item_func_trim(thd, a) {}
String *val_str(String *) override;
const Schema *schema() const override { return &mariadb_schema; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("rtrim") };
return name;
}
LEX_CSTRING mode_name() const override
{ return { STRING_WITH_LEN("trailing") }; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_rtrim>(thd, this); }
};
class Item_func_rtrim_oracle :public Item_func_rtrim
{
protected:
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_rtrim_oracle(THD *thd, Item *a, Item *b):
Item_func_rtrim(thd, a, b) {}
Item_func_rtrim_oracle(THD *thd, Item *a): Item_func_rtrim(thd, a) {}
const Schema *schema() const override { return &oracle_schema_ref; }
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_rtrim::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_rtrim_oracle>(thd, this); }
};
/*
Item_func_password -- new (4.1.1) PASSWORD() function implementation.
Returns strcat('*', octet2hex(sha1(sha1(password)))). '*' stands for new
password format, sha1(sha1(password) is so-called hash_stage2 value.
Length of returned string is always 41 byte. To find out how entire
authentication procedure works, see comments in password.c.
*/
class Item_func_password :public Item_str_ascii_checksum_func
{
public:
enum PW_Alg {OLD, NEW};
private:
char tmp_value[SCRAMBLED_PASSWORD_CHAR_LENGTH+1];
enum PW_Alg alg;
bool deflt;
public:
Item_func_password(THD *thd, Item *a):
Item_str_ascii_checksum_func(thd, a), alg(NEW), deflt(1) {}
Item_func_password(THD *thd, Item *a, PW_Alg al):
Item_str_ascii_checksum_func(thd, a), alg(al), deflt(0) {}
String *val_str_ascii(String *str) override;
bool fix_fields(THD *thd, Item **ref) override;
bool fix_length_and_dec(THD *thd) override
{
fix_length_and_charset((alg == 1 ?
SCRAMBLED_PASSWORD_CHAR_LENGTH :
SCRAMBLED_PASSWORD_CHAR_LENGTH_323),
default_charset());
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING password_normal= {STRING_WITH_LEN("password") };
static LEX_CSTRING password_old= {STRING_WITH_LEN("old_password") };
return (deflt || alg == 1) ? password_normal : password_old;
}
static char *alloc(THD *thd, const char *password, size_t pass_len,
enum PW_Alg al);
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_password>(thd, this); }
};
class Item_func_des_encrypt :public Item_str_binary_checksum_func
{
String tmp_value,tmp_arg;
public:
Item_func_des_encrypt(THD *thd, Item *a)
:Item_str_binary_checksum_func(thd, a) {}
Item_func_des_encrypt(THD *thd, Item *a, Item *b)
:Item_str_binary_checksum_func(thd, a, b) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("des_encrypt") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_des_encrypt>(thd, this); }
};
class Item_func_des_decrypt :public Item_str_binary_checksum_func
{
String tmp_value;
public:
Item_func_des_decrypt(THD *thd, Item *a)
:Item_str_binary_checksum_func(thd, a) {}
Item_func_des_decrypt(THD *thd, Item *a, Item *b)
:Item_str_binary_checksum_func(thd, a, b) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("des_decrypt") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_des_decrypt>(thd, this); }
};
/**
QQ: Item_func_encrypt should derive from Item_str_ascii_checksum_func.
However, it should be fixed to handle UCS2, UTF16, UTF32 properly first,
as the underlying crypt() call expects a null-terminated input string.
*/
class Item_func_encrypt :public Item_str_binary_checksum_func
{
String tmp_value;
/* Encapsulate common constructor actions */
void constructor_helper()
{
collation.set(&my_charset_bin);
}
public:
Item_func_encrypt(THD *thd, Item *a): Item_str_binary_checksum_func(thd, a)
{
constructor_helper();
}
Item_func_encrypt(THD *thd, Item *a, Item *b)
:Item_str_binary_checksum_func(thd, a, b)
{
constructor_helper();
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
set_maybe_null();
max_length = 13;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("encrypt") };
return name;
}
bool check_vcol_func_processor(void *arg) override
{
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_encrypt>(thd, this); }
};
#include "sql_crypt.h"
class Item_func_encode :public Item_str_binary_checksum_func
{
private:
/** Whether the PRNG has already been seeded. */
bool seeded;
protected:
SQL_CRYPT sql_crypt;
public:
Item_func_encode(THD *thd, Item *a, Item *seed_arg):
Item_str_binary_checksum_func(thd, a, seed_arg) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("encode") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_encode>(thd, this); }
protected:
virtual void crypto_transform(String *);
private:
/** Provide a seed for the PRNG sequence. */
bool seed();
};
class Item_func_decode :public Item_func_encode
{
public:
Item_func_decode(THD *thd, Item *a, Item *seed_arg): Item_func_encode(thd, a, seed_arg) {}
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("decode") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_decode>(thd, this); }
protected:
void crypto_transform(String *) override;
};
class Item_func_sysconst :public Item_str_func
{
public:
Item_func_sysconst(THD *thd): Item_str_func(thd)
{ collation.set(system_charset_info,DERIVATION_SYSCONST); }
Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs) override;
/*
Used to create correct Item name in new converted item in
safe_charset_converter, return string representation of this function
call
*/
virtual const char *fully_qualified_func_name() const = 0;
bool check_vcol_func_processor(void *arg) override
{
return mark_unsupported_function(fully_qualified_func_name(), arg,
VCOL_SESSION_FUNC);
}
bool const_item() const override;
};
class Item_func_database :public Item_func_sysconst
{
public:
Item_func_database(THD *thd): Item_func_sysconst(thd) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= NAME_CHAR_LEN * system_charset_info->mbmaxlen;
set_maybe_null();
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("database") };
return name;
}
const char *fully_qualified_func_name() const override
{ return "database()"; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_database>(thd, this); }
};
class Item_func_sqlerrm :public Item_func_sysconst
{
public:
Item_func_sqlerrm(THD *thd): Item_func_sysconst(thd) {}
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("SQLERRM") };
return name;
}
const char *fully_qualified_func_name() const override
{ return "SQLERRM"; }
void print(String *str, enum_query_type query_type) override
{
str->append(func_name_cstring());
}
bool fix_length_and_dec(THD *thd) override
{
max_length= 512 * system_charset_info->mbmaxlen;
null_value= false;
base_flags&= ~item_base_t::MAYBE_NULL;
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_sqlerrm>(thd, this); }
};
class Item_func_user :public Item_func_sysconst
{
protected:
bool init (const char *user, const char *host);
public:
Item_func_user(THD *thd): Item_func_sysconst(thd)
{
str_value.set("", 0, system_charset_info);
}
String *val_str(String *) override
{
DBUG_ASSERT(fixed());
return (null_value ? 0 : &str_value);
}
bool fix_fields(THD *thd, Item **ref) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= (uint32) (username_char_length +
HOSTNAME_LENGTH + 1) * SYSTEM_CHARSET_MBMAXLEN;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("user") };
return name;
}
const char *fully_qualified_func_name() const override
{ return "user()"; }
int save_in_field(Field *field, bool no_conversions) override
{
return save_str_value_in_field(field, &str_value);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_user>(thd, this); }
};
class Item_func_current_user :public Item_func_user
{
Name_resolution_context *context;
public:
Item_func_current_user(THD *thd, Name_resolution_context *context_arg):
Item_func_user(thd), context(context_arg) {}
bool fix_fields(THD *thd, Item **ref) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("current_user") };
return name;
}
const char *fully_qualified_func_name() const override
{ return "current_user()"; }
bool check_vcol_func_processor(void *arg) override
{
context= 0;
return mark_unsupported_function(fully_qualified_func_name(), arg,
VCOL_SESSION_FUNC);
}
};
class Item_func_current_role :public Item_func_sysconst
{
Name_resolution_context *context;
public:
Item_func_current_role(THD *thd, Name_resolution_context *context_arg):
Item_func_sysconst(thd), context(context_arg) {}
bool fix_fields(THD *thd, Item **ref) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= (uint32) username_char_length * SYSTEM_CHARSET_MBMAXLEN;
return FALSE;
}
int save_in_field(Field *field, bool no_conversions) override
{ return save_str_value_in_field(field, &str_value); }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("current_role") };
return name;
}
const char *fully_qualified_func_name() const override
{ return "current_role()"; }
String *val_str(String *) override
{
DBUG_ASSERT(fixed());
return null_value ? NULL : &str_value;
}
bool check_vcol_func_processor(void *arg) override
{
context= 0;
return mark_unsupported_function(fully_qualified_func_name(), arg,
VCOL_SESSION_FUNC);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_current_role>(thd, this); }
};
class Item_func_soundex :public Item_str_func
{
String tmp_value;
public:
Item_func_soundex(THD *thd, Item *a): Item_str_func(thd, a) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("soundex") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_soundex>(thd, this); }
};
class Item_func_elt :public Item_str_func
{
public:
Item_func_elt(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
double val_real() override;
longlong val_int() override;
String *val_str(String *str) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("elt") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_elt>(thd, this); }
};
class Item_func_make_set :public Item_str_func
{
String tmp_str;
public:
Item_func_make_set(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
String *val_str(String *str) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("make_set") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_make_set>(thd, this); }
};
class Item_func_format :public Item_str_ascii_func
{
const MY_LOCALE *locale;
public:
Item_func_format(THD *thd, Item *org, Item *dec):
Item_str_ascii_func(thd, org, dec) {}
Item_func_format(THD *thd, Item *org, Item *dec, Item *lang):
Item_str_ascii_func(thd, org, dec, lang) {}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("format") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_format>(thd, this); }
};
class Item_func_char :public Item_str_func
{
public:
Item_func_char(THD *thd, List<Item> &list): Item_str_func(thd, list)
{ collation.set(&my_charset_bin); }
Item_func_char(THD *thd, List<Item> &list, CHARSET_INFO *cs):
Item_str_func(thd, list)
{ collation.set(cs); }
Item_func_char(THD *thd, Item *arg1, CHARSET_INFO *cs):
Item_str_func(thd, arg1)
{ collation.set(cs); }
String *val_str(String *) override;
void append_char(String * str, int32 num);
bool fix_length_and_dec(THD *thd) override
{
max_length= arg_count * 4;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("char") };
return name;
}
void print(String *str, enum_query_type query_type) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_char>(thd, this); }
};
class Item_func_chr :public Item_func_char
{
public:
Item_func_chr(THD *thd, Item *arg1, CHARSET_INFO *cs):
Item_func_char(thd, arg1, cs) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= 4;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("chr") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_chr>(thd, this); }
};
class Item_func_repeat :public Item_str_func
{
String tmp_value;
public:
Item_func_repeat(THD *thd, Item *arg1, Item *arg2):
Item_str_func(thd, arg1, arg2) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("repeat") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_repeat>(thd, this); }
};
class Item_func_space :public Item_str_func
{
public:
Item_func_space(THD *thd, Item *arg1): Item_str_func(thd, arg1) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("space") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_space>(thd, this); }
};
class Item_func_binlog_gtid_pos :public Item_str_func
{
public:
Item_func_binlog_gtid_pos(THD *thd, Item *arg1, Item *arg2):
Item_str_func(thd, arg1, arg2) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("binlog_gtid_pos") };
return name;
}
bool check_vcol_func_processor(void *arg) override
{
return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_binlog_gtid_pos>(thd, this); }
};
class Item_func_pad: public Item_str_func
{
protected:
String tmp_value, pad_str;
public:
Item_func_pad(THD *thd, Item *arg1, Item *arg2, Item *arg3):
Item_str_func(thd, arg1, arg2, arg3) {}
Item_func_pad(THD *thd, Item *arg1, Item *arg2):
Item_str_func(thd, arg1, arg2) {}
Item_func_pad(THD *thd, List<Item> &list):
Item_str_func(thd,list) {}
bool fix_length_and_dec(THD *thd) override;
};
class Item_func_rpad :public Item_func_pad
{
public:
Item_func_rpad(THD *thd, Item *arg1, Item *arg2, Item *arg3):
Item_func_pad(thd, arg1, arg2, arg3) {}
Item_func_rpad(THD *thd, Item *arg1, Item *arg2):
Item_func_pad(thd, arg1, arg2) {}
Item_func_rpad(THD *thd, List<Item> &list):
Item_func_pad(thd,list) {}
String *val_str(String *) override;
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("rpad") };
return name;
}
Sql_mode_dependency value_depends_on_sql_mode() const override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_rpad>(thd, this); }
};
class Item_func_rpad_oracle :public Item_func_rpad
{
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_rpad_oracle(THD *thd, Item *arg1, Item *arg2, Item *arg3):
Item_func_rpad(thd, arg1, arg2, arg3) {}
Item_func_rpad_oracle(THD *thd, Item *arg1, Item *arg2):
Item_func_rpad(thd, arg1, arg2) {}
Item_func_rpad_oracle(THD *thd, List<Item> &list):
Item_func_rpad(thd,list) {}
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_rpad::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
const Schema *schema() const override { return &oracle_schema_ref; }
void print(String *str, enum_query_type query_type) override
{
if (query_type & QT_FOR_FRM)
{
// 10.3 downgrade compatibility for FRM
str->append(STRING_WITH_LEN("rpad_oracle"));
}
else
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_rpad_oracle>(thd, this); }
};
class Item_func_lpad :public Item_func_pad
{
public:
Item_func_lpad(THD *thd, Item *arg1, Item *arg2, Item *arg3):
Item_func_pad(thd, arg1, arg2, arg3) {}
Item_func_lpad(THD *thd, Item *arg1, Item *arg2):
Item_func_pad(thd, arg1, arg2) {}
Item_func_lpad(THD *thd, List<Item> &list):
Item_func_pad(thd,list) {}
String *val_str(String *) override;
const Schema *schema() const override { return &mariadb_schema; }
void print(String *str, enum_query_type query_type) override
{
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("lpad") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_lpad>(thd, this); }
};
class Item_func_lpad_oracle :public Item_func_lpad
{
String *make_empty_result(String *str) override
{ null_value= 1; return NULL; }
public:
Item_func_lpad_oracle(THD *thd, Item *arg1, Item *arg2, Item *arg3):
Item_func_lpad(thd, arg1, arg2, arg3) {}
Item_func_lpad_oracle(THD *thd, Item *arg1, Item *arg2):
Item_func_lpad(thd, arg1, arg2) {}
Item_func_lpad_oracle(THD *thd, List<Item> &list):
Item_func_lpad(thd,list) {}
bool fix_length_and_dec(THD *thd) override
{
bool res= Item_func_lpad::fix_length_and_dec(thd);
set_maybe_null();
return res;
}
const Schema *schema() const override { return &oracle_schema_ref; }
void print(String *str, enum_query_type query_type) override
{
if (query_type & QT_FOR_FRM)
{
// 10.3 downgrade compatibility for FRM
str->append(STRING_WITH_LEN("lpad_oracle"));
}
else
print_sql_mode_qualified_name(str, query_type);
print_args_parenthesized(str, query_type);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_lpad_oracle>(thd, this); }
};
class Item_func_conv :public Item_str_func
{
public:
Item_func_conv(THD *thd, Item *a, Item *b, Item *c):
Item_str_func(thd, a, b, c) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("conv") };
return name;
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
collation.set(default_charset());
fix_char_length(64);
set_maybe_null();
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_conv>(thd, this); }
};
class Item_func_hex :public Item_str_ascii_checksum_func
{
protected:
String tmp_value;
/*
Calling arg[0]->type_handler() can be expensive on every row.
It's a virtual method, and in case if args[0] is a complex Item,
its type_handler() can call more virtual methods.
So let's cache it during fix_length_and_dec().
*/
const Type_handler *m_arg0_type_handler;
public:
Item_func_hex(THD *thd, Item *a):
Item_str_ascii_checksum_func(thd, a), m_arg0_type_handler(NULL) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("hex") };
return name;
}
String *val_str_ascii_from_val_int(String *str);
String *val_str_ascii_from_val_real(String *str);
String *val_str_ascii_from_val_str(String *str);
String *val_str_ascii(String *str) override
{
DBUG_ASSERT(fixed());
return m_arg0_type_handler->Item_func_hex_val_str_ascii(this, str);
}
bool fix_length_and_dec(THD *thd) override
{
m_arg0_type_handler= args[0]->type_handler();
collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
decimals=0;
/*
Reserve space for 16 characters for signed numeric data types:
hex(-1) -> 'FFFFFFFFFFFFFFFF'.
For unsigned numeric types, HEX() can create too large columns.
This should be eventually fixed to create minimum possible columns.
*/
const Type_handler_numeric *tn=
dynamic_cast<const Type_handler_numeric*>(m_arg0_type_handler);
size_t char_length= (tn && !(tn->flags() & UNSIGNED_FLAG)) ?
(size_t) 16 : (size_t) args[0]->max_length * 2;
fix_char_length(char_length);
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_hex>(thd, this); }
};
class Item_func_unhex :public Item_str_func
{
String tmp_value;
public:
Item_func_unhex(THD *thd, Item *a): Item_str_func(thd, a)
{
/* there can be bad hex strings */
set_maybe_null();
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("unhex") };
return name;
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
collation.set(&my_charset_bin);
decimals=0;
max_length=(1+args[0]->max_length)/2;
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_unhex>(thd, this); }
};
#ifndef DBUG_OFF
class Item_func_like_range :public Item_str_func
{
protected:
String min_str;
String max_str;
const bool is_min;
public:
Item_func_like_range(THD *thd, Item *a, Item *b, bool is_min_arg):
Item_str_func(thd, a, b), is_min(is_min_arg)
{
set_maybe_null();
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
collation.set(args[0]->collation);
decimals=0;
max_length= MAX_BLOB_WIDTH;
return FALSE;
}
};
class Item_func_like_range_min :public Item_func_like_range
{
public:
Item_func_like_range_min(THD *thd, Item *a, Item *b):
Item_func_like_range(thd, a, b, true) { }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("like_range_min") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_like_range_min>(thd, this); }
};
class Item_func_like_range_max :public Item_func_like_range
{
public:
Item_func_like_range_max(THD *thd, Item *a, Item *b):
Item_func_like_range(thd, a, b, false) { }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("like_range_max") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_like_range_max>(thd, this); }
};
#endif
class Item_func_binary :public Item_str_func
{
public:
Item_func_binary(THD *thd, Item *a): Item_str_func(thd, a) {}
String *val_str(String *a) override
{
DBUG_ASSERT(fixed());
String *tmp=args[0]->val_str(a);
null_value=args[0]->null_value;
if (tmp)
tmp->set_charset(&my_charset_bin);
return tmp;
}
bool fix_length_and_dec(THD *thd) override
{
collation.set(&my_charset_bin);
max_length=args[0]->max_length;
return FALSE;
}
void print(String *str, enum_query_type query_type) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("cast_as_binary") };
return name;
}
bool need_parentheses_in_default() override { return true; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_binary>(thd, this); }
};
class Item_load_file :public Item_str_func
{
String tmp_value;
public:
Item_load_file(THD *thd, Item *a): Item_str_func(thd, a) {}
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("load_file") };
return name;
}
bool fix_length_and_dec(THD *thd) override
{
collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
set_maybe_null();
max_length=MAX_BLOB_WIDTH;
return FALSE;
}
bool check_vcol_func_processor(void *arg) override
{
return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_load_file>(thd, this); }
};
class Item_func_export_set: public Item_str_func
{
public:
Item_func_export_set(THD *thd, Item *a, Item *b, Item* c):
Item_str_func(thd, a, b, c) {}
Item_func_export_set(THD *thd, Item *a, Item *b, Item* c, Item* d):
Item_str_func(thd, a, b, c, d) {}
Item_func_export_set(THD *thd, Item *a, Item *b, Item* c, Item* d, Item* e):
Item_str_func(thd, a, b, c, d, e) {}
String *val_str(String *str) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("export_set") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_export_set>(thd, this); }
};
class Item_func_quote :public Item_str_func
{
String tmp_value;
public:
Item_func_quote(THD *thd, Item *a): Item_str_func(thd, a) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("quote") };
return name;
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
collation.set(args[0]->collation);
ulonglong max_result_length= (ulonglong) args[0]->max_length * 2 +
2 * collation.collation->mbmaxlen;
// NULL argument is returned as a string "NULL" without quotes
if (args[0]->maybe_null())
set_if_bigger(max_result_length, 4 * collation.collation->mbmaxlen);
max_length= (uint32) MY_MIN(max_result_length, MAX_BLOB_WIDTH);
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_quote>(thd, this); }
};
class Item_func_conv_charset :public Item_str_func
{
bool use_cached_value;
String tmp_value;
public:
bool safe;
Item_func_conv_charset(THD *thd, Item *a, CHARSET_INFO *cs):
Item_str_func(thd, a)
{
collation.set(cs, DERIVATION_IMPLICIT);
use_cached_value= 0; safe= 0;
}
Item_func_conv_charset(THD *thd, Item *a, CHARSET_INFO *cs, bool cache_if_const):
Item_str_func(thd, a)
{
collation.set(cs, DERIVATION_IMPLICIT);
if (cache_if_const && args[0]->can_eval_in_optimize())
{
uint errors= 0;
String tmp, *str= args[0]->val_str(&tmp);
if (!str || str_value.copy(str->ptr(), str->length(),
str->charset(), cs, &errors))
null_value= 1;
use_cached_value= 1;
str_value.mark_as_const();
safe= (errors == 0);
}
else
{
use_cached_value= 0;
/*
Conversion from and to "binary" is safe.
Conversion to Unicode is safe.
Conversion from an expression with the ASCII repertoire
to any character set that can store characters U+0000..U+007F
is safe:
- All supported multibyte character sets can store U+0000..U+007F
- All supported 7bit character sets can store U+0000..U+007F
except those marked with MY_CS_NONASCII (e.g. swe7).
Other kind of conversions are potentially lossy.
*/
safe= (args[0]->collation.collation == &my_charset_bin ||
cs == &my_charset_bin ||
(cs->state & MY_CS_UNICODE) ||
(args[0]->collation.repertoire == MY_REPERTOIRE_ASCII &&
(cs->mbmaxlen > 1 || !(cs->state & MY_CS_NONASCII))));
}
}
String *val_str(String *) override;
longlong val_int() override
{
if (args[0]->result_type() == STRING_RESULT)
return Item_str_func::val_int();
longlong res= args[0]->val_int();
if ((null_value= args[0]->null_value))
return 0;
return res;
}
double val_real() override
{
if (args[0]->result_type() == STRING_RESULT)
return Item_str_func::val_real();
double res= args[0]->val_real();
if ((null_value= args[0]->null_value))
return 0;
return res;
}
my_decimal *val_decimal(my_decimal *d) override
{
if (args[0]->result_type() == STRING_RESULT)
return Item_str_func::val_decimal(d);
my_decimal *res= args[0]->val_decimal(d);
if ((null_value= args[0]->null_value))
return NULL;
return res;
}
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override
{
if (args[0]->result_type() == STRING_RESULT)
return Item_str_func::get_date(thd, ltime, fuzzydate);
bool res= args[0]->get_date(thd, ltime, fuzzydate);
if ((null_value= args[0]->null_value))
return 1;
return res;
}
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("convert") };
return name;
}
void print(String *str, enum_query_type query_type) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_conv_charset>(thd, this); }
int save_in_field(Field*, bool) override;
};
class Item_func_set_collation :public Item_str_func
{
Lex_extended_collation_st m_set_collation;
public:
Item_func_set_collation(THD *thd, Item *a,
const Lex_extended_collation_st &set_collation):
Item_str_func(thd, a), m_set_collation(set_collation) {}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
bool eq(const Item *item, bool binary_cmp) const override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("collate") };
return name;
}
enum precedence precedence() const override { return COLLATE_PRECEDENCE; }
enum Functype functype() const override { return COLLATE_FUNC; }
void print(String *str, enum_query_type query_type) override;
Item_field *field_for_view_update() override
{
/* this function is transparent for view updating */
return args[0]->field_for_view_update();
}
bool need_parentheses_in_default() override { return true; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_set_collation>(thd, this); }
};
class Item_func_expr_str_metadata :public Item_str_func
{
public:
Item_func_expr_str_metadata(THD *thd, Item *a): Item_str_func(thd, a) { }
bool fix_length_and_dec(THD *thd) override
{
collation.set(system_charset_info);
max_length= 64 * collation.collation->mbmaxlen; // should be enough
base_flags&= ~item_base_t::MAYBE_NULL;
return FALSE;
};
table_map not_null_tables() const override { return 0; }
Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
override
{ return this; }
bool const_item() const override { return true; }
};
class Item_func_charset :public Item_func_expr_str_metadata
{
LEX_CSTRING m_cached_charset_info;
public:
Item_func_charset(THD *thd, Item *a)
:Item_func_expr_str_metadata(thd, a) { }
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("charset") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_charset>(thd, this); }
table_map used_tables() const override { return 0; }
bool fix_length_and_dec(THD* thd) override
{
if (Item_func_expr_str_metadata::fix_length_and_dec(thd))
return true;
/*
Since this is a const item which doesn't use tables (see used_tables()),
we don't want to access the function arguments during execution.
That's why we store the charset here during the preparation phase
and only return it later at the execution phase
*/
DBUG_ASSERT(args[0]->fixed());
m_cached_charset_info.str= args[0]->charset_for_protocol()->cs_name.str;
m_cached_charset_info.length=
args[0]->charset_for_protocol()->cs_name.length;
return false;
}
};
class Item_func_collation :public Item_func_expr_str_metadata
{
public:
Item_func_collation(THD *thd, Item *a)
:Item_func_expr_str_metadata(thd, a) {}
String *val_str(String *) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("collation") };
return name;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_collation>(thd, this); }
};
class Item_func_weight_string :public Item_str_func
{
String tmp_value;
uint weigth_flags;
uint nweights;
uint result_length;
public:
Item_func_weight_string(THD *thd, Item *a, uint result_length_arg,
uint nweights_arg, uint flags_arg):
Item_str_func(thd, a)
{
nweights= nweights_arg;
weigth_flags= flags_arg;
result_length= result_length_arg;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("weight_string") };
return name;
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override;
bool eq(const Item *item, bool binary_cmp) const override
{
if (!Item_str_func::eq(item, binary_cmp))
return false;
Item_func_weight_string *that= (Item_func_weight_string *)item;
return this->weigth_flags == that->weigth_flags &&
this->nweights == that->nweights &&
this->result_length == that->result_length;
}
Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
override
{ return this; }
void print(String *str, enum_query_type query_type) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_weight_string>(thd, this); }
};
class Item_func_crc32 :public Item_long_func
{
bool check_arguments() const override
{
return args[0]->check_type_can_return_str(func_name_cstring()) &&
(arg_count == 1 ||
args[1]->check_type_can_return_int(func_name_cstring()));
}
String value;
uint32 (*const crc_func)(uint32, const void*, size_t);
public:
Item_func_crc32(THD *thd, bool Castagnoli, Item *a) :
Item_long_func(thd, a),
crc_func(Castagnoli ? my_crc32c : my_checksum)
{ unsigned_flag= 1; }
Item_func_crc32(THD *thd, bool Castagnoli, Item *a, Item *b) :
Item_long_func(thd, a, b),
crc_func(Castagnoli ? my_crc32c : my_checksum)
{ unsigned_flag= 1; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING crc32_name= {STRING_WITH_LEN("crc32") };
static LEX_CSTRING crc32c_name= {STRING_WITH_LEN("crc32c") };
return crc_func == my_crc32c ? crc32c_name : crc32_name;
}
bool fix_length_and_dec(THD *thd) override { max_length=10; return FALSE; }
longlong val_int() override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_crc32>(thd, this); }
};
class Item_func_uncompressed_length : public Item_long_func_length
{
String value;
public:
Item_func_uncompressed_length(THD *thd, Item *a)
:Item_long_func_length(thd, a) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("uncompressed_length") };
return name;
}
bool fix_length_and_dec(THD *thd) override
{
max_length=10;
set_maybe_null();
return FALSE; }
longlong val_int() override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_uncompressed_length>(thd, this); }
};
#ifdef HAVE_COMPRESS
#define ZLIB_DEPENDED_FUNCTION ;
#else
#define ZLIB_DEPENDED_FUNCTION { null_value=1; return 0; }
#endif
class Item_func_compress: public Item_str_binary_checksum_func
{
String tmp_value;
public:
Item_func_compress(THD *thd, Item *a)
:Item_str_binary_checksum_func(thd, a) {}
bool fix_length_and_dec(THD *thd) override
{
max_length= (args[0]->max_length * 120) / 100 + 12;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("compress") };
return name;
}
String *val_str(String *) override ZLIB_DEPENDED_FUNCTION
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_compress>(thd, this); }
};
class Item_func_uncompress: public Item_str_binary_checksum_func
{
String tmp_value;
public:
Item_func_uncompress(THD *thd, Item *a)
:Item_str_binary_checksum_func(thd, a) {}
bool fix_length_and_dec(THD *thd) override
{
set_maybe_null();
max_length= MAX_BLOB_WIDTH;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("uncompress") };
return name;
}
String *val_str(String *) override ZLIB_DEPENDED_FUNCTION
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_uncompress>(thd, this); }
};
class Item_func_dyncol_create: public Item_str_func
{
protected:
DYNCALL_CREATE_DEF *defs;
DYNAMIC_COLUMN_VALUE *vals;
uint *keys_num;
LEX_STRING *keys_str;
bool names, force_names;
bool prepare_arguments(THD *thd, bool force_names);
void print_arguments(String *str, enum_query_type query_type);
public:
Item_func_dyncol_create(THD *thd, List<Item> &args, DYNCALL_CREATE_DEF *dfs);
bool fix_fields(THD *thd, Item **ref) override;
bool fix_length_and_dec(THD *thd) override;
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("column_create") };
return name;
}
String *val_str(String *) override;
void print(String *str, enum_query_type query_type) override;
enum Functype functype() const override { return DYNCOL_FUNC; }
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_dyncol_create>(thd, this); }
};
class Item_func_dyncol_add: public Item_func_dyncol_create
{
public:
Item_func_dyncol_add(THD *thd, List<Item> &args_arg, DYNCALL_CREATE_DEF *dfs):
Item_func_dyncol_create(thd, args_arg, dfs)
{}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("column_add") };
return name;
}
String *val_str(String *) override;
void print(String *str, enum_query_type query_type) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_dyncol_add>(thd, this); }
};
class Item_func_dyncol_json: public Item_str_func
{
public:
Item_func_dyncol_json(THD *thd, Item *str): Item_str_func(thd, str)
{collation.set(DYNCOL_UTF);}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("column_json") };
return name;
}
String *val_str(String *) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= MAX_BLOB_WIDTH;
set_maybe_null();
decimals= 0;
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_dyncol_json>(thd, this); }
};
/*
The following functions is always called from an Item_cast function
*/
class Item_dyncol_get: public Item_str_func
{
public:
Item_dyncol_get(THD *thd, Item *str, Item *num): Item_str_func(thd, str, num)
{}
bool fix_length_and_dec(THD *thd) override
{
set_maybe_null();
max_length= MAX_BLOB_WIDTH;
return FALSE;
}
/* Mark that collation can change between calls */
bool dynamic_result() override { return 1; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("column_get") };
return name;
}
String *val_str(String *) override;
longlong val_int() override;
longlong val_int_signed_typecast() override
{
unsigned_flag= false; // Mark that we want to have a signed value
longlong value= val_int(); // val_int() can change unsigned_flag
if (!null_value && unsigned_flag && value < 0)
push_note_converted_to_negative_complement(current_thd);
return value;
}
longlong val_int_unsigned_typecast() override
{
unsigned_flag= true; // Mark that we want to have an unsigned value
longlong value= val_int(); // val_int() can change unsigned_flag
if (!null_value && unsigned_flag == 0 && value < 0)
push_note_converted_to_positive_complement(current_thd);
return value;
}
double val_real() override;
my_decimal *val_decimal(my_decimal *) override;
bool get_dyn_value(THD *thd, DYNAMIC_COLUMN_VALUE *val, String *tmp);
bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override;
void print(String *str, enum_query_type query_type) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_dyncol_get>(thd, this); }
};
class Item_func_dyncol_list: public Item_str_func
{
public:
Item_func_dyncol_list(THD *thd, Item *str): Item_str_func(thd, str)
{collation.set(DYNCOL_UTF);}
bool fix_length_and_dec(THD *thd) override
{
set_maybe_null();
max_length= MAX_BLOB_WIDTH;
return FALSE;
}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("column_list") };
return name;
}
String *val_str(String *) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_dyncol_list>(thd, this); }
};
/*
this is used by JOIN_TAB::keep_current_rowid
and stores handler::position().
It has nothing to do with _rowid pseudo-column, that the parser supports.
*/
class Item_temptable_rowid :public Item_str_func
{
public:
TABLE *table;
Item_temptable_rowid(TABLE *table_arg);
const Type_handler *type_handler() const override
{ return &type_handler_string; }
Field *create_tmp_field(MEM_ROOT *root, bool group, TABLE *table)
{ return create_table_field_from_handler(root, table); }
String *val_str(String *str) override;
enum Functype functype() const override { return TEMPTABLE_ROWID; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("<rowid>") };
return name;
}
bool fix_length_and_dec(THD *thd) override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_temptable_rowid>(thd, this); }
};
#ifdef WITH_WSREP
#include "wsrep_api.h"
class Item_func_wsrep_last_written_gtid: public Item_str_ascii_func
{
String gtid_str;
public:
Item_func_wsrep_last_written_gtid(THD *thd): Item_str_ascii_func(thd) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("wsrep_last_written_gtid") };
return name;
}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= WSREP_GTID_STR_LEN;
set_maybe_null();
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_wsrep_last_written_gtid>(thd, this); }
};
class Item_func_wsrep_last_seen_gtid: public Item_str_ascii_func
{
String gtid_str;
public:
Item_func_wsrep_last_seen_gtid(THD *thd): Item_str_ascii_func(thd) {}
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("wsrep_last_seen_gtid") };
return name;
}
String *val_str_ascii(String *) override;
bool fix_length_and_dec(THD *thd) override
{
max_length= WSREP_GTID_STR_LEN;
set_maybe_null();
return FALSE;
}
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_wsrep_last_seen_gtid>(thd, this); }
};
class Item_func_wsrep_sync_wait_upto: public Item_int_func
{
String value;
public:
Item_func_wsrep_sync_wait_upto(THD *thd, Item *a): Item_int_func(thd, a) {}
Item_func_wsrep_sync_wait_upto(THD *thd, Item *a, Item* b): Item_int_func(thd, a, b) {}
const Type_handler *type_handler() const override
{ return &type_handler_string; }
LEX_CSTRING func_name_cstring() const override
{
static LEX_CSTRING name= {STRING_WITH_LEN("wsrep_sync_wait_upto_gtid") };
return name;
}
longlong val_int() override;
Item *do_get_copy(THD *thd) const override
{ return get_item_copy<Item_func_wsrep_sync_wait_upto>(thd, this); }
};
#endif /* WITH_WSREP */
#endif /* ITEM_STRFUNC_INCLUDED */
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