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1505 lines
45 KiB
C++
1505 lines
45 KiB
C++
#ifndef ITEM_STRFUNC_INCLUDED
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#define ITEM_STRFUNC_INCLUDED
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/*
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Copyright (c) 2000, 2011, Oracle and/or its affiliates.
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Copyright (c) 2009, 2015, MariaDB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
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/* This file defines all string functions */
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#endif
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extern size_t username_char_length;
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class MY_LOCALE;
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class Item_str_func :public Item_func
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{
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protected:
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/**
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Sets the result value of the function an empty string, using the current
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character set. No memory is allocated.
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@retval A pointer to the str_value member.
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*/
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String *make_empty_result()
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{
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/*
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Reset string length to an empty string. We don't use str_value.set() as
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we don't want to free and potentially have to reallocate the buffer
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for each call.
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*/
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str_value.length(0);
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str_value.set_charset(collation.collation);
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return &str_value;
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}
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public:
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Item_str_func(THD *thd): Item_func(thd) { decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, Item *a): Item_func(thd, a) {decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, Item *a, Item *b):
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Item_func(thd, a, b) { decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, Item *a, Item *b, Item *c):
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Item_func(thd, a, b, c) { decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d):
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Item_func(thd, a, b, c, d) { decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d, Item* e):
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Item_func(thd, a, b, c, d, e) { decimals=NOT_FIXED_DEC; }
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Item_str_func(THD *thd, List<Item> &list):
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Item_func(thd, list) { decimals=NOT_FIXED_DEC; }
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longlong val_int();
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double val_real();
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my_decimal *val_decimal(my_decimal *);
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enum Item_result result_type () const { return STRING_RESULT; }
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enum_field_types field_type() const { return string_field_type(); }
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void left_right_max_length();
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bool fix_fields(THD *thd, Item **ref);
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void update_null_value()
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{
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StringBuffer<MAX_FIELD_WIDTH> tmp;
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(void) val_str(&tmp);
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}
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};
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/*
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Functions that return values with ASCII repertoire
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*/
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class Item_str_ascii_func :public Item_str_func
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{
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String ascii_buf;
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public:
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Item_str_ascii_func(THD *thd): Item_str_func(thd) {}
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Item_str_ascii_func(THD *thd, Item *a): Item_str_func(thd, a) {}
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Item_str_ascii_func(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
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Item_str_ascii_func(THD *thd, Item *a, Item *b, Item *c):
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Item_str_func(thd, a, b, c) {}
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String *val_str(String *str)
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{
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return val_str_from_val_str_ascii(str, &ascii_buf);
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}
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String *val_str_ascii(String *)= 0;
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};
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/**
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Functions that return a checksum or a hash of the argument,
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or somehow else encode or decode the argument,
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returning an ASCII-repertoire string.
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*/
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class Item_str_ascii_checksum_func: public Item_str_ascii_func
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{
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public:
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Item_str_ascii_checksum_func(THD *thd, Item *a)
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:Item_str_ascii_func(thd, a) { }
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Item_str_ascii_checksum_func(THD *thd, Item *a, Item *b)
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:Item_str_ascii_func(thd, a, b) { }
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bool eq(const Item *item, bool binary_cmp) const
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{
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// Always use binary argument comparison: MD5('x') != MD5('X')
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return Item_func::eq(item, true);
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}
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};
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/**
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Functions that return a checksum or a hash of the argument,
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or somehow else encode or decode the argument,
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returning a binary string.
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*/
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class Item_str_binary_checksum_func: public Item_str_func
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{
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public:
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Item_str_binary_checksum_func(THD *thd, Item *a)
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:Item_str_func(thd, a) { }
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Item_str_binary_checksum_func(THD *thd, Item *a, Item *b)
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:Item_str_func(thd, a, b) { }
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bool eq(const Item *item, bool binary_cmp) const
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{
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/*
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Always use binary argument comparison:
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FROM_BASE64('test') != FROM_BASE64('TEST')
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*/
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return Item_func::eq(item, true);
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}
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};
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class Item_func_md5 :public Item_str_ascii_checksum_func
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{
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public:
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Item_func_md5(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
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String *val_str_ascii(String *);
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void fix_length_and_dec()
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{
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fix_length_and_charset(32, default_charset());
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}
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const char *func_name() const { return "md5"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_md5>(thd, mem_root, this); }
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};
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class Item_func_sha :public Item_str_ascii_checksum_func
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{
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public:
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Item_func_sha(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
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String *val_str_ascii(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "sha"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_sha>(thd, mem_root, this); }
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};
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class Item_func_sha2 :public Item_str_ascii_checksum_func
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{
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public:
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Item_func_sha2(THD *thd, Item *a, Item *b)
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:Item_str_ascii_checksum_func(thd, a, b) {}
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String *val_str_ascii(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "sha2"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_sha2>(thd, mem_root, this); }
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};
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class Item_func_to_base64 :public Item_str_ascii_checksum_func
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{
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String tmp_value;
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public:
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Item_func_to_base64(THD *thd, Item *a)
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:Item_str_ascii_checksum_func(thd, a) {}
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String *val_str_ascii(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "to_base64"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_to_base64>(thd, mem_root, this); }
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};
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class Item_func_from_base64 :public Item_str_binary_checksum_func
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{
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String tmp_value;
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public:
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Item_func_from_base64(THD *thd, Item *a)
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:Item_str_binary_checksum_func(thd, a) { }
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "from_base64"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_from_base64>(thd, mem_root, this); }
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};
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#include <my_crypt.h>
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class Item_aes_crypt :public Item_str_binary_checksum_func
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{
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enum { AES_KEY_LENGTH = 128 };
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void create_key(String *user_key, uchar* key);
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protected:
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int what;
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public:
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Item_aes_crypt(THD *thd, Item *a, Item *b)
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:Item_str_binary_checksum_func(thd, a, b) {}
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String *val_str(String *);
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};
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class Item_func_aes_encrypt :public Item_aes_crypt
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{
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public:
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Item_func_aes_encrypt(THD *thd, Item *a, Item *b):
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Item_aes_crypt(thd, a, b) {}
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void fix_length_and_dec();
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const char *func_name() const { return "aes_encrypt"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_aes_encrypt>(thd, mem_root, this); }
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};
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class Item_func_aes_decrypt :public Item_aes_crypt
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{
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public:
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Item_func_aes_decrypt(THD *thd, Item *a, Item *b):
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Item_aes_crypt(thd, a, b) {}
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void fix_length_and_dec();
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const char *func_name() const { return "aes_decrypt"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_aes_decrypt>(thd, mem_root, this); }
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};
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class Item_func_concat :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_concat(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
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Item_func_concat(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "concat"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_concat>(thd, mem_root, this); }
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};
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class Item_func_decode_histogram :public Item_str_func
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{
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public:
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Item_func_decode_histogram(THD *thd, Item *a, Item *b):
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Item_str_func(thd, a, b) {}
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String *val_str(String *);
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void fix_length_and_dec()
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{
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collation.set(system_charset_info);
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max_length= MAX_BLOB_WIDTH;
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maybe_null= 1;
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}
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const char *func_name() const { return "decode_histogram"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_decode_histogram>(thd, mem_root, this); }
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};
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class Item_func_concat_ws :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_concat_ws(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "concat_ws"; }
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table_map not_null_tables() const { return 0; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_concat_ws>(thd, mem_root, this); }
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};
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class Item_func_reverse :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_reverse(THD *thd, Item *a): Item_str_func(thd, a) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "reverse"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_reverse>(thd, mem_root, this); }
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};
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class Item_func_replace :public Item_str_func
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{
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String tmp_value,tmp_value2;
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public:
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Item_func_replace(THD *thd, Item *org, Item *find, Item *replace):
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Item_str_func(thd, org, find, replace) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "replace"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_replace>(thd, mem_root, this); }
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};
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class Item_func_regexp_replace :public Item_str_func
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{
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Regexp_processor_pcre re;
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bool append_replacement(String *str,
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const LEX_CSTRING *source,
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const LEX_CSTRING *replace);
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public:
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Item_func_regexp_replace(THD *thd, Item *a, Item *b, Item *c):
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Item_str_func(thd, a, b, c)
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{}
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void cleanup()
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{
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DBUG_ENTER("Item_func_regex::cleanup");
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Item_str_func::cleanup();
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re.cleanup();
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DBUG_VOID_RETURN;
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}
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String *val_str(String *str);
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bool fix_fields(THD *thd, Item **ref);
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void fix_length_and_dec();
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const char *func_name() const { return "regexp_replace"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return 0;}
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};
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class Item_func_regexp_substr :public Item_str_func
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{
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Regexp_processor_pcre re;
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public:
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Item_func_regexp_substr(THD *thd, Item *a, Item *b):
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Item_str_func(thd, a, b)
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{}
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void cleanup()
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{
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DBUG_ENTER("Item_func_regex::cleanup");
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Item_str_func::cleanup();
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re.cleanup();
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DBUG_VOID_RETURN;
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}
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String *val_str(String *str);
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bool fix_fields(THD *thd, Item **ref);
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void fix_length_and_dec();
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const char *func_name() const { return "regexp_substr"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return 0; }
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};
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class Item_func_insert :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_insert(THD *thd, Item *org, Item *start, Item *length,
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Item *new_str):
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Item_str_func(thd, org, start, length, new_str) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "insert"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_insert>(thd, mem_root, this); }
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};
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class Item_str_conv :public Item_str_func
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{
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protected:
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uint multiply;
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my_charset_conv_case converter;
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String tmp_value;
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public:
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Item_str_conv(THD *thd, Item *item): Item_str_func(thd, item) {}
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String *val_str(String *);
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};
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class Item_func_lcase :public Item_str_conv
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{
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public:
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Item_func_lcase(THD *thd, Item *item): Item_str_conv(thd, item) {}
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const char *func_name() const { return "lcase"; }
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void fix_length_and_dec();
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_lcase>(thd, mem_root, this); }
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};
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class Item_func_ucase :public Item_str_conv
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{
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public:
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Item_func_ucase(THD *thd, Item *item): Item_str_conv(thd, item) {}
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const char *func_name() const { return "ucase"; }
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void fix_length_and_dec();
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_ucase>(thd, mem_root, this); }
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};
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class Item_func_left :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_left(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "left"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_left>(thd, mem_root, this); }
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};
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class Item_func_right :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_right(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "right"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_right>(thd, mem_root, this); }
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};
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class Item_func_substr :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_substr(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
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Item_func_substr(THD *thd, Item *a, Item *b, Item *c): Item_str_func(thd, a, b, c) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "substr"; }
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_substr>(thd, mem_root, this); }
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};
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class Item_func_substr_index :public Item_str_func
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{
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String tmp_value;
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public:
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Item_func_substr_index(THD *thd, Item *a,Item *b,Item *c):
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Item_str_func(thd, a, b, c) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "substring_index"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_substr_index>(thd, mem_root, this); }
|
|
|
|
};
|
|
|
|
|
|
class Item_func_trim :public Item_str_func
|
|
{
|
|
protected:
|
|
String tmp_value;
|
|
String remove;
|
|
String *trimmed_value(String *res, uint32 offset, uint32 length)
|
|
{
|
|
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) {}
|
|
String *val_str(String *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "trim"; }
|
|
void print(String *str, enum_query_type query_type);
|
|
virtual const char *mode_name() const { return "both"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_trim>(thd, mem_root, 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) {}
|
|
String *val_str(String *);
|
|
const char *func_name() const { return "ltrim"; }
|
|
const char *mode_name() const { return "leading"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_ltrim>(thd, mem_root, 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 *);
|
|
const char *func_name() const { return "rtrim"; }
|
|
const char *mode_name() const { return "trailing"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_rtrim>(thd, mem_root, 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);
|
|
bool fix_fields(THD *thd, Item **ref);
|
|
void fix_length_and_dec()
|
|
{
|
|
fix_length_and_charset((alg == 1 ?
|
|
SCRAMBLED_PASSWORD_CHAR_LENGTH :
|
|
SCRAMBLED_PASSWORD_CHAR_LENGTH_323),
|
|
default_charset());
|
|
}
|
|
const char *func_name() const { return ((deflt || alg == 1) ?
|
|
"password" : "old_password"); }
|
|
static char *alloc(THD *thd, const char *password, size_t pass_len,
|
|
enum PW_Alg al);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_password>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec()
|
|
{
|
|
maybe_null=1;
|
|
/* 9 = MAX ((8- (arg_len % 8)) + 1) */
|
|
max_length = args[0]->max_length + 9;
|
|
}
|
|
const char *func_name() const { return "des_encrypt"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_des_encrypt>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec()
|
|
{
|
|
maybe_null=1;
|
|
/* 9 = MAX ((8- (arg_len % 8)) + 1) */
|
|
max_length= args[0]->max_length;
|
|
if (max_length >= 9U)
|
|
max_length-= 9U;
|
|
}
|
|
const char *func_name() const { return "des_decrypt"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_des_decrypt>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec() { maybe_null=1; max_length = 13; }
|
|
const char *func_name() const { return "encrypt"; }
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
return FALSE;
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_encrypt>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "encode"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_encode>(thd, mem_root, 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 char *func_name() const { return "decode"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_decode>(thd, mem_root, this); }
|
|
protected:
|
|
void crypto_transform(String *);
|
|
};
|
|
|
|
|
|
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);
|
|
/*
|
|
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)
|
|
{
|
|
return mark_unsupported_function(fully_qualified_func_name(), arg,
|
|
VCOL_SESSION_FUNC);
|
|
}
|
|
bool const_item() const;
|
|
};
|
|
|
|
|
|
class Item_func_database :public Item_func_sysconst
|
|
{
|
|
public:
|
|
Item_func_database(THD *thd): Item_func_sysconst(thd) {}
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
max_length= MAX_FIELD_NAME * system_charset_info->mbmaxlen;
|
|
maybe_null=1;
|
|
}
|
|
const char *func_name() const { return "database"; }
|
|
const char *fully_qualified_func_name() const { return "database()"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_database>(thd, mem_root, 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 *)
|
|
{
|
|
DBUG_ASSERT(fixed == 1);
|
|
return (null_value ? 0 : &str_value);
|
|
}
|
|
bool fix_fields(THD *thd, Item **ref);
|
|
void fix_length_and_dec()
|
|
{
|
|
max_length= (uint32) (username_char_length +
|
|
HOSTNAME_LENGTH + 1) * SYSTEM_CHARSET_MBMAXLEN;
|
|
}
|
|
const char *func_name() const { return "user"; }
|
|
const char *fully_qualified_func_name() const { return "user()"; }
|
|
int save_in_field(Field *field, bool no_conversions)
|
|
{
|
|
return save_str_value_in_field(field, &str_value);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_user>(thd, mem_root, 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);
|
|
const char *func_name() const { return "current_user"; }
|
|
const char *fully_qualified_func_name() const { return "current_user()"; }
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
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);
|
|
void fix_length_and_dec()
|
|
{ max_length= (uint32) username_char_length * SYSTEM_CHARSET_MBMAXLEN; }
|
|
int save_in_field(Field *field, bool no_conversions)
|
|
{ return save_str_value_in_field(field, &str_value); }
|
|
const char *func_name() const { return "current_role"; }
|
|
const char *fully_qualified_func_name() const { return "current_role()"; }
|
|
String *val_str(String *)
|
|
{
|
|
DBUG_ASSERT(fixed == 1);
|
|
return null_value ? NULL : &str_value;
|
|
}
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
|
|
context= 0;
|
|
return mark_unsupported_function(fully_qualified_func_name(), arg,
|
|
VCOL_SESSION_FUNC);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_current_role>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "soundex"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_soundex>(thd, mem_root, 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();
|
|
longlong val_int();
|
|
String *val_str(String *str);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "elt"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_elt>(thd, mem_root, 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);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "make_set"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_make_set>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_format :public Item_str_ascii_func
|
|
{
|
|
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) {}
|
|
|
|
MY_LOCALE *get_locale(Item *item);
|
|
String *val_str_ascii(String *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "format"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_format>(thd, mem_root, 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); }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
max_length= arg_count * 4;
|
|
}
|
|
const char *func_name() const { return "char"; }
|
|
void print(String *str, enum_query_type query_type);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_char>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "repeat"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_repeat>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "space"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_space>(thd, mem_root, 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 *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "binlog_gtid_pos"; }
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_binlog_gtid_pos>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_rpad :public Item_str_func
|
|
{
|
|
String tmp_value, rpad_str;
|
|
public:
|
|
Item_func_rpad(THD *thd, Item *arg1, Item *arg2, Item *arg3):
|
|
Item_str_func(thd, arg1, arg2, arg3) {}
|
|
String *val_str(String *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "rpad"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_rpad>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_lpad :public Item_str_func
|
|
{
|
|
String tmp_value, lpad_str;
|
|
public:
|
|
Item_func_lpad(THD *thd, Item *arg1, Item *arg2, Item *arg3):
|
|
Item_str_func(thd, arg1, arg2, arg3) {}
|
|
String *val_str(String *);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "lpad"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_lpad>(thd, mem_root, 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) {}
|
|
const char *func_name() const { return "conv"; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(default_charset());
|
|
max_length=64;
|
|
maybe_null= 1;
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_conv>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_hex :public Item_str_ascii_checksum_func
|
|
{
|
|
String tmp_value;
|
|
public:
|
|
Item_func_hex(THD *thd, Item *a):
|
|
Item_str_ascii_checksum_func(thd, a) {}
|
|
const char *func_name() const { return "hex"; }
|
|
String *val_str_ascii(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(default_charset());
|
|
decimals=0;
|
|
fix_char_length(args[0]->max_length * 2);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_hex>(thd, mem_root, 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 */
|
|
maybe_null= 1;
|
|
}
|
|
const char *func_name() const { return "unhex"; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(&my_charset_bin);
|
|
decimals=0;
|
|
max_length=(1+args[0]->max_length)/2;
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_unhex>(thd, mem_root, 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)
|
|
{ maybe_null= 1; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(args[0]->collation);
|
|
decimals=0;
|
|
max_length= MAX_BLOB_WIDTH;
|
|
}
|
|
};
|
|
|
|
|
|
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) { }
|
|
const char *func_name() const { return "like_range_min"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_like_range_min>(thd, mem_root, 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) { }
|
|
const char *func_name() const { return "like_range_max"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_like_range_max>(thd, mem_root, 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)
|
|
{
|
|
DBUG_ASSERT(fixed == 1);
|
|
String *tmp=args[0]->val_str(a);
|
|
null_value=args[0]->null_value;
|
|
if (tmp)
|
|
tmp->set_charset(&my_charset_bin);
|
|
return tmp;
|
|
}
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(&my_charset_bin);
|
|
max_length=args[0]->max_length;
|
|
}
|
|
void print(String *str, enum_query_type query_type);
|
|
const char *func_name() const { return "cast_as_binary"; }
|
|
bool need_parentheses_in_default() { return true; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_binary>(thd, mem_root, 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 *);
|
|
const char *func_name() const { return "load_file"; }
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
|
|
maybe_null=1;
|
|
max_length=MAX_BLOB_WIDTH;
|
|
}
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_load_file>(thd, mem_root, 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);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "export_set"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_export_set>(thd, mem_root, 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) {}
|
|
const char *func_name() const { return "quote"; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(args[0]->collation);
|
|
ulonglong max_result_length= (ulonglong) args[0]->max_length * 2 +
|
|
2 * collation.collation->mbmaxlen;
|
|
max_length= (uint32) MY_MIN(max_result_length, MAX_BLOB_WIDTH);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_quote>(thd, mem_root, 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]->const_item() && !args[0]->is_expensive())
|
|
{
|
|
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.
|
|
Other kind of conversions are potentially lossy.
|
|
*/
|
|
safe= (args[0]->collation.collation == &my_charset_bin ||
|
|
cs == &my_charset_bin ||
|
|
(cs->state & MY_CS_UNICODE));
|
|
}
|
|
}
|
|
String *val_str(String *);
|
|
longlong val_int()
|
|
{
|
|
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()
|
|
{
|
|
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)
|
|
{
|
|
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(MYSQL_TIME *ltime, ulonglong fuzzydate)
|
|
{
|
|
if (args[0]->result_type() == STRING_RESULT)
|
|
return Item_str_func::get_date(ltime, fuzzydate);
|
|
bool res= args[0]->get_date(ltime, fuzzydate);
|
|
if ((null_value= args[0]->null_value))
|
|
return 1;
|
|
return res;
|
|
}
|
|
void fix_length_and_dec();
|
|
const char *func_name() const { return "convert"; }
|
|
void print(String *str, enum_query_type query_type);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_conv_charset>(thd, mem_root, this); }
|
|
};
|
|
|
|
class Item_func_set_collation :public Item_str_func
|
|
{
|
|
public:
|
|
Item_func_set_collation(THD *thd, Item *a, Item *b):
|
|
Item_str_func(thd, a, b) {}
|
|
String *val_str(String *);
|
|
void fix_length_and_dec();
|
|
bool eq(const Item *item, bool binary_cmp) const;
|
|
const char *func_name() const { return "collate"; }
|
|
enum precedence precedence() const { return COLLATE_PRECEDENCE; }
|
|
enum Functype functype() const { return COLLATE_FUNC; }
|
|
void print(String *str, enum_query_type query_type);
|
|
Item_field *field_for_view_update()
|
|
{
|
|
/* this function is transparent for view updating */
|
|
return args[0]->field_for_view_update();
|
|
}
|
|
bool need_parentheses_in_default() { return true; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_set_collation>(thd, mem_root, 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) { }
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(system_charset_info);
|
|
max_length= 64 * collation.collation->mbmaxlen; // should be enough
|
|
maybe_null= 0;
|
|
};
|
|
table_map not_null_tables() const { return 0; }
|
|
Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
|
|
{ return this; }
|
|
bool const_item() const { return true; }
|
|
};
|
|
|
|
|
|
class Item_func_charset :public Item_func_expr_str_metadata
|
|
{
|
|
public:
|
|
Item_func_charset(THD *thd, Item *a)
|
|
:Item_func_expr_str_metadata(thd, a) { }
|
|
String *val_str(String *);
|
|
const char *func_name() const { return "charset"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_charset>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
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 *);
|
|
const char *func_name() const { return "collation"; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_collation>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_weight_string :public Item_str_func
|
|
{
|
|
String tmp_value;
|
|
uint 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;
|
|
flags= flags_arg;
|
|
result_length= result_length_arg;
|
|
}
|
|
const char *func_name() const { return "weight_string"; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec();
|
|
bool eq(const Item *item, bool binary_cmp) const
|
|
{
|
|
if (!Item_str_func::eq(item, binary_cmp))
|
|
return false;
|
|
Item_func_weight_string *that= (Item_func_weight_string *)item;
|
|
return this->flags == that->flags &&
|
|
this->nweights == that->nweights &&
|
|
this->result_length == that->result_length;
|
|
}
|
|
Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
|
|
{ return this; }
|
|
void print(String *str, enum_query_type query_type);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_weight_string>(thd, mem_root, this); }
|
|
};
|
|
|
|
class Item_func_crc32 :public Item_int_func
|
|
{
|
|
String value;
|
|
public:
|
|
Item_func_crc32(THD *thd, Item *a): Item_int_func(thd, a)
|
|
{ unsigned_flag= 1; }
|
|
const char *func_name() const { return "crc32"; }
|
|
void fix_length_and_dec() { max_length=10; }
|
|
longlong val_int();
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_crc32>(thd, mem_root, this); }
|
|
};
|
|
|
|
class Item_func_uncompressed_length : public Item_int_func
|
|
{
|
|
String value;
|
|
public:
|
|
Item_func_uncompressed_length(THD *thd, Item *a): Item_int_func(thd, a) {}
|
|
const char *func_name() const{return "uncompressed_length";}
|
|
void fix_length_and_dec() { max_length=10; maybe_null= true; }
|
|
longlong val_int();
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_uncompressed_length>(thd, mem_root, 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) {}
|
|
void fix_length_and_dec(){max_length= (args[0]->max_length*120)/100+12;}
|
|
const char *func_name() const{return "compress";}
|
|
String *val_str(String *) ZLIB_DEPENDED_FUNCTION
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_compress>(thd, mem_root, 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) {}
|
|
void fix_length_and_dec(){ maybe_null= 1; max_length= MAX_BLOB_WIDTH; }
|
|
const char *func_name() const{return "uncompress";}
|
|
String *val_str(String *) ZLIB_DEPENDED_FUNCTION
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_uncompress>(thd, mem_root, this); }
|
|
};
|
|
|
|
|
|
class Item_func_uuid: public Item_str_func
|
|
{
|
|
public:
|
|
Item_func_uuid(THD *thd): Item_str_func(thd) {}
|
|
void fix_length_and_dec()
|
|
{
|
|
collation.set(system_charset_info,
|
|
DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
|
|
fix_char_length(MY_UUID_STRING_LENGTH);
|
|
}
|
|
const char *func_name() const{ return "uuid"; }
|
|
String *val_str(String *);
|
|
bool check_vcol_func_processor(void *arg)
|
|
{
|
|
return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC);
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_uuid>(thd, mem_root, 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);
|
|
void fix_length_and_dec();
|
|
const char *func_name() const{ return "column_create"; }
|
|
String *val_str(String *);
|
|
void print(String *str, enum_query_type query_type);
|
|
enum Functype functype() const { return DYNCOL_FUNC; }
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_dyncol_create>(thd, mem_root, 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)
|
|
{}
|
|
const char *func_name() const{ return "column_add"; }
|
|
String *val_str(String *);
|
|
void print(String *str, enum_query_type query_type);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_dyncol_add>(thd, mem_root, 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);}
|
|
const char *func_name() const{ return "column_json"; }
|
|
String *val_str(String *);
|
|
void fix_length_and_dec()
|
|
{
|
|
max_length= MAX_BLOB_WIDTH;
|
|
maybe_null= 1;
|
|
decimals= 0;
|
|
}
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_dyncol_json>(thd, mem_root, 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)
|
|
{}
|
|
void fix_length_and_dec()
|
|
{ maybe_null= 1;; max_length= MAX_BLOB_WIDTH; }
|
|
/* Mark that collation can change between calls */
|
|
bool dynamic_result() { return 1; }
|
|
|
|
const char *func_name() const { return "column_get"; }
|
|
String *val_str(String *);
|
|
longlong val_int();
|
|
longlong val_int_signed_typecast()
|
|
{
|
|
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()
|
|
{
|
|
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();
|
|
my_decimal *val_decimal(my_decimal *);
|
|
bool get_dyn_value(THD *thd, DYNAMIC_COLUMN_VALUE *val, String *tmp);
|
|
bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate);
|
|
void print(String *str, enum_query_type query_type);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_dyncol_get>(thd, mem_root, 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);}
|
|
void fix_length_and_dec() { maybe_null= 1; max_length= MAX_BLOB_WIDTH; };
|
|
const char *func_name() const{ return "column_list"; }
|
|
String *val_str(String *);
|
|
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
|
|
{ return get_item_copy<Item_func_dyncol_list>(thd, mem_root, this); }
|
|
};
|
|
|
|
#endif /* ITEM_STRFUNC_INCLUDED */
|
|
|