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#ifndef ITEM_JSONFUNC_INCLUDED
#define ITEM_JSONFUNC_INCLUDED
/* Copyright (c) 2016, MariaDB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* This file defines all JSON functions */
#include <json_lib.h>
#include "item_cmpfunc.h" // Item_bool_func
#include "item_strfunc.h" // Item_str_func
class json_path_with_flags
{
public:
json_path_t p;
bool constant;
bool parsed;
json_path_step_t *cur_step;
void set_constant_flag(bool s_constant)
{
constant= s_constant;
parsed= FALSE;
}
};
class Item_func_json_valid: public Item_int_func
{
protected:
String tmp_value;
public:
Item_func_json_valid(THD *thd, Item *json) : Item_int_func(thd, json) {}
longlong val_int();
const char *func_name() const { return "json_valid"; }
void fix_length_and_dec()
{
Item_int_func::fix_length_and_dec();
maybe_null= 1;
}
bool is_bool_type() { return true; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_valid>(thd, mem_root, this); }
};
class Item_func_json_exists: public Item_int_func
{
protected:
json_path_with_flags path;
String tmp_js, tmp_path;
public:
Item_func_json_exists(THD *thd, Item *js, Item *path):
Item_int_func(thd, js, path) {}
const char *func_name() const { return "json_exists"; }
bool is_bool_type() { return true; }
void fix_length_and_dec();
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_exists>(thd, mem_root, this); }
longlong val_int();
};
class Item_func_json_value: public Item_str_func
{
protected:
json_path_with_flags path;
String tmp_js, tmp_path;
public:
Item_func_json_value(THD *thd, Item *js, Item *path):
Item_str_func(thd, js, path) {}
const char *func_name() const { return "json_value"; }
void fix_length_and_dec();
String *val_str(String *);
virtual bool check_and_get_value(json_engine_t *je, String *res, int *error);
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_value>(thd, mem_root, this); }
};
class Item_func_json_query: public Item_func_json_value
{
public:
Item_func_json_query(THD *thd, Item *js, Item *path):
Item_func_json_value(thd, js, path) {}
const char *func_name() const { return "json_query"; }
bool check_and_get_value(json_engine_t *je, String *res, int *error);
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_query>(thd, mem_root, this); }
};
class Item_func_json_quote: public Item_str_func
{
protected:
String tmp_s;
public:
Item_func_json_quote(THD *thd, Item *s): Item_str_func(thd, s) {}
const char *func_name() const { return "json_quote"; }
void fix_length_and_dec();
String *val_str(String *);
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_quote>(thd, mem_root, this); }
};
class Item_json_str_multipath: public Item_str_func
{
protected:
json_path_with_flags *paths;
String *tmp_paths;
public:
Item_json_str_multipath(THD *thd, List<Item> &list):
Item_str_func(thd, list), tmp_paths(0) {}
bool fix_fields(THD *thd, Item **ref);
void cleanup();
virtual uint get_n_paths() const = 0;
};
class Item_func_json_extract: public Item_json_str_multipath
{
protected:
String tmp_js;
public:
Item_func_json_extract(THD *thd, List<Item> &list):
Item_json_str_multipath(thd, list) {}
const char *func_name() const { return "json_extract"; }
void fix_length_and_dec();
String *val_str(String *);
longlong val_int();
uint get_n_paths() const { return arg_count - 1; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_extract>(thd, mem_root, this); }
};
class Item_func_json_contains: public Item_int_func
{
protected:
String tmp_js;
json_path_with_flags *paths;
String *tmp_paths;
bool a2_constant, a2_parsed;
String tmp_val, *val;
public:
Item_func_json_contains(THD *thd, List<Item> &list):
Item_int_func(thd, list), tmp_paths(0) {}
const char *func_name() const { return "json_contains"; }
bool fix_fields(THD *thd, Item **ref);
void fix_length_and_dec();
void cleanup();
longlong val_int();
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_contains>(thd, mem_root, this); }
};
class Item_func_json_contains_path: public Item_int_func
{
protected:
String tmp_js;
json_path_with_flags *paths;
String *tmp_paths;
bool mode_one;
bool ooa_constant, ooa_parsed;
public:
Item_func_json_contains_path(THD *thd, List<Item> &list):
Item_int_func(thd, list), tmp_paths(0) {}
const char *func_name() const { return "json_contains_path"; }
bool fix_fields(THD *thd, Item **ref);
void fix_length_and_dec();
void cleanup();
longlong val_int();
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_contains_path>(thd, mem_root, this); }
};
class Item_func_json_array: public Item_str_func
{
protected:
String tmp_val;
public:
Item_func_json_array(THD *thd):
Item_str_func(thd) {}
Item_func_json_array(THD *thd, List<Item> &list):
Item_str_func(thd, list) {}
String *val_str(String *);
void fix_length_and_dec();
const char *func_name() const { return "json_array"; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_array>(thd, mem_root, this); }
};
class Item_func_json_array_append: public Item_json_str_multipath
{
protected:
String tmp_js;
String tmp_val;
public:
Item_func_json_array_append(THD *thd, List<Item> &list):
Item_json_str_multipath(thd, list) {}
void fix_length_and_dec();
String *val_str(String *);
uint get_n_paths() const { return arg_count/2; }
const char *func_name() const { return "json_array_append"; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_array_append>(thd, mem_root, this); }
};
class Item_func_json_object: public Item_func_json_array
{
public:
Item_func_json_object(THD *thd):
Item_func_json_array(thd) {}
Item_func_json_object(THD *thd, List<Item> &list):
Item_func_json_array(thd, list) {}
String *val_str(String *);
const char *func_name() const { return "json_object"; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_object>(thd, mem_root, this); }
};
class Item_func_json_merge: public Item_func_json_array
{
protected:
String tmp_val;
public:
Item_func_json_merge(THD *thd, List<Item> &list):
Item_func_json_array(thd, list) {}
String *val_str(String *);
const char *func_name() const { return "json_merge"; }
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_merge>(thd, mem_root, this); }
};
class Item_func_json_length: public Item_int_func
{
protected:
String tmp_js;
String tmp_path;
public:
Item_func_json_length(THD *thd, List<Item> &list):
Item_int_func(thd, list) {}
const char *func_name() const { return "json_length"; }
longlong val_int();
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_length>(thd, mem_root, this); }
};
class Item_func_json_depth: public Item_int_func
{
protected:
String tmp_js;
public:
Item_func_json_depth(THD *thd, Item *js): Item_int_func(thd, js) {}
const char *func_name() const { return "json_depth"; }
longlong val_int();
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_depth>(thd, mem_root, this); }
};
class Item_func_json_type: public Item_str_func
{
protected:
String tmp_js;
public:
Item_func_json_type(THD *thd, Item *js): Item_str_func(thd, js) {}
const char *func_name() const { return "json_type"; }
void fix_length_and_dec();
String *val_str(String *);
Item *get_copy(THD *thd, MEM_ROOT *mem_root)
{ return get_item_copy<Item_func_json_type>(thd, mem_root, this); }
};
#endif /* ITEM_JSONFUNC_INCLUDED */
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