item_gtid_func.h

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/* Copyright (c) 2000, 2025, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   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, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
/* This file defines all string functions */
#ifndef ITEM_GTID_INCLUDED
#define ITEM_GTID_INCLUDED
 
#include "item_func.h"
#include "item_strfunc.h"
#include "sql/parse_location.h"  // POS
#include "sql_string.h"
 
class Item;
class THD;
struct Parse_context;
 
/**
  This class is used for implementing the new wait_for_executed_gtid_set
  function and the functions related to them. This new function is independent
  of the slave threads.
*/
class Item_wait_for_executed_gtid_set final : public Item_int_func {
  typedef Item_int_func super;
 
  String value;
 
 public:
  Item_wait_for_executed_gtid_set(const POS &pos, Item *a)
      : Item_int_func(pos, a) {
    null_on_null = false;
  }
  Item_wait_for_executed_gtid_set(const POS &pos, Item *a, Item *b)
      : Item_int_func(pos, a, b) {
    null_on_null = false;
  }
 
  bool itemize(Parse_context *pc, Item **res) override;
  longlong val_int() override;
  const char *func_name() const override {
    return "wait_for_executed_gtid_set";
  }
  bool resolve_type(THD *thd) override {
    if (param_type_is_default(thd, 0, 1)) return true;
    if (param_type_is_default(thd, 1, 2, MYSQL_TYPE_DOUBLE)) return true;
    set_nullable(true);
    return false;
  }
};
 
class Item_master_gtid_set_wait final : public Item_int_func {
  typedef Item_int_func super;
 
  String gtid_value;
  String channel_value;
 
 public:
  Item_master_gtid_set_wait(const POS &pos, Item *a);
  Item_master_gtid_set_wait(const POS &pos, Item *a, Item *b);
  Item_master_gtid_set_wait(const POS &pos, Item *a, Item *b, Item *c);
 
  bool itemize(Parse_context *pc, Item **res) override;
  longlong val_int() override;
  const char *func_name() const override {
    return "wait_until_sql_thread_after_gtids";
  }
  bool resolve_type(THD *thd) override {
    if (param_type_is_default(thd, 0, 1)) return true;
    if (param_type_is_default(thd, 1, 2, MYSQL_TYPE_DOUBLE)) return true;
    if (param_type_is_default(thd, 2, 3)) return true;
    set_nullable(true);
    return false;
  }
};
 
class Item_func_gtid_subset final : public Item_int_func {
  String buf1;
  String buf2;
 
 public:
  Item_func_gtid_subset(const POS &pos, Item *a, Item *b)
      : Item_int_func(pos, a, b) {}
  longlong val_int() override;
  const char *func_name() const override { return "gtid_subset"; }
  bool resolve_type(THD *thd) override {
    if (param_type_is_default(thd, 0, ~0U)) return true;
    return false;
  }
  bool is_bool_func() const override { return true; }
};
 
class Item_func_gtid_subtract final : public Item_str_ascii_func {
  String buf1, buf2;
 
 public:
  Item_func_gtid_subtract(const POS &pos, Item *a, Item *b)
      : Item_str_ascii_func(pos, a, b) {}
  bool resolve_type(THD *) override;
  const char *func_name() const override { return "gtid_subtract"; }
  String *val_str_ascii(String *) override;
};
 
#endif /* ITEM_GTID_INCLUDED */