MySQL 源码解读 -- parser

structure

//Internal state of the parser.
class Parser_state {
  Parser_input m_input;  //control the parser behavior
  Lex_input_stream m_lip; //state data used during lexical parsing
  Yacc_state m_yacc; //state data used during syntactic parsing.
  bool m_comment;  ///< True if current query contains comments
}

struct Parser_input {
  bool m_compute_digest;
};