sql_parser_state.h

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/*
  Copyright (c) 2023, 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
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  permission to link the program and your derivative works with the
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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
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*/
 
#ifndef ROUTING_SQL_PARSER_STATE_INCLUDED
#define ROUTING_SQL_PARSER_STATE_INCLUDED
 
#include <string_view>
 
#include "my_alloc.h"  // MEM_ROOT
#include "sql_lexer.h"
#include "sql_lexer_thd.h"  // THD
 
class SqlParserState {
 public:
  SqlParserState() {
    session_.mem_root = &mem_root_;
    session_.m_parser_state = &parser_state_;
  }
 
  void statement(std::string_view stmt) {
    // copy the string as the lexer needs a trailing \0
    stmt_ = stmt;
 
    parser_state_.init(&session_, stmt_.data(), stmt_.size());
  }
 
  SqlLexer lexer(bool reset_state = true) {
    if (reset_state) parser_state_.reset(stmt_.data(), stmt_.size());
 
    return {&session_};
  }
 
  THD *thd() { return &session_; }
 
  Parser_state *parser_state() { return &parser_state_; }
 
 private:
  MEM_ROOT mem_root_;
  THD session_;
  Parser_state parser_state_;
 
  std::string stmt_;
};
 
#endif