sql_lexer_thd.h

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/*
  Copyright (c) 2022, 2024, 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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  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
  permission to link the program and your derivative works with the
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  the program or referenced in the documentation.
 
  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
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*/
 
#ifndef ROUTING_SQL_LEXER_THD_INCLUDED
#define ROUTING_SQL_LEXER_THD_INCLUDED
 
#include <stdint.h>
 
#include "my_alloc.h"               // MEM_ROOT
#include "my_sys.h"                 // strmake_root
#include "mysql/strings/m_ctype.h"  // CHARSET_INFO
#include "sql_lexer_parser_state.h"
 
class THD {
 public:
  using sql_mode_t = uint64_t;
 
  MEM_ROOT *mem_root{nullptr};  // Pointer to current memroot
 
  const CHARSET_INFO *charset() const { return variables.character_set_client; }
  bool convert_string(LEX_STRING * /* to */, const CHARSET_INFO * /* to_cs */,
                      const char * /* from */, size_t /* from_length */,
                      const CHARSET_INFO * /* from_cs */,
                      bool /* report_error */ = false) {
    return true;
  }
 
  void *alloc(size_t size) { return mem_root->Alloc(size); }
 
  char *strmake(const char *str, size_t size) const {
    return strmake_root(mem_root, str, size);
  }
 
 public:
  struct System_variables {
    sql_mode_t sql_mode{};
    const CHARSET_INFO *character_set_client{&my_charset_latin1};
    const CHARSET_INFO *default_collation_for_utf8mb4{
        &my_charset_utf8mb4_0900_ai_ci};
  };
 
  System_variables variables;
 
  Parser_state *m_parser_state;
};
 
#endif