5.6之後新功能特性引進，此sql命令集合會繼續變化。在/sql/sql_lex.cc 中  mysqld.cc中 兩者完全一致

enum enum_sql_command {

  SQLCOM_SELECT, SQLCOM_CREATE_TABLE, SQLCOM_CREATE_INDEX, SQLCOM_ALTER_TABLE,
  SQLCOM_UPDATE, SQLCOM_INSERT, SQLCOM_INSERT_SELECT,
  SQLCOM_DELETE, SQLCOM_TRUNCATE, SQLCOM_DROP_TABLE, SQLCOM_DROP_INDEX,

  SQLCOM_SHOW_DATABASES, SQLCOM_SHOW_TABLES, SQLCOM_SHOW_FIELDS,
  SQLCOM_SHOW_KEYS, SQLCOM_SHOW_VARIABLES, SQLCOM_SHOW_STATUS,
  SQLCOM_SHOW_ENGINE_LOGS, SQLCOM_SHOW_ENGINE_STATUS, SQLCOM_SHOW_ENGINE_MUTEX,
  SQLCOM_SHOW_PROCESSLIST, SQLCOM_SHOW_MASTER_STAT, SQLCOM_SHOW_SLAVE_STAT,
  SQLCOM_SHOW_GRANTS, SQLCOM_SHOW_CREATE, SQLCOM_SHOW_CHARSETS,
  SQLCOM_SHOW_COLLATIONS, SQLCOM_SHOW_CREATE_DB, SQLCOM_SHOW_TABLE_STATUS,
  SQLCOM_SHOW_TRIGGERS,

  SQLCOM_LOAD,SQLCOM_SET_OPTION,SQLCOM_LOCK_TABLES,SQLCOM_UNLOCK_TABLES,
  SQLCOM_GRANT,
  SQLCOM_CHANGE_DB, SQLCOM_CREATE_DB, SQLCOM_DROP_DB, SQLCOM_ALTER_DB,
  SQLCOM_REPAIR, SQLCOM_REPLACE, SQLCOM_REPLACE_SELECT,
  SQLCOM_CREATE_FUNCTION, SQLCOM_DROP_FUNCTION,
  SQLCOM_REVOKE,SQLCOM_OPTIMIZE, SQLCOM_CHECK,
  SQLCOM_ASSIGN_TO_KEYCACHE, SQLCOM_PRELOAD_KEYS,
  SQLCOM_FLUSH, SQLCOM_KILL, SQLCOM_ANALYZE,
  SQLCOM_ROLLBACK, SQLCOM_ROLLBACK_TO_SAVEPOINT,
  SQLCOM_COMMIT, SQLCOM_SAVEPOINT, SQLCOM_RELEASE_SAVEPOINT,
  SQLCOM_SLAVE_START, SQLCOM_SLAVE_STOP,
  SQLCOM_BEGIN, SQLCOM_CHANGE_MASTER,
  SQLCOM_RENAME_TABLE,
  SQLCOM_RESET, SQLCOM_PURGE, SQLCOM_PURGE_BEFORE, SQLCOM_SHOW_BINLOGS,
  SQLCOM_SHOW_OPEN_TABLES,
  SQLCOM_HA_OPEN, SQLCOM_HA_CLOSE, SQLCOM_HA_READ,
  SQLCOM_SHOW_SLAVE_HOSTS, SQLCOM_DELETE_MULTI, SQLCOM_UPDATE_MULTI,
  SQLCOM_SHOW_BINLOG_EVENTS, SQLCOM_DO,
  SQLCOM_SHOW_WARNS, SQLCOM_EMPTY_QUERY, SQLCOM_SHOW_ERRORS,
  SQLCOM_SHOW_STORAGE_ENGINES, SQLCOM_SHOW_PRIVILEGES,
  SQLCOM_HELP, SQLCOM_CREATE_USER, SQLCOM_DROP_USER, SQLCOM_RENAME_USER,
  SQLCOM_REVOKE_ALL, SQLCOM_CHECKSUM,
  SQLCOM_CREATE_PROCEDURE, SQLCOM_CREATE_SPFUNCTION, SQLCOM_CALL,
  SQLCOM_DROP_PROCEDURE, SQLCOM_ALTER_PROCEDURE,SQLCOM_ALTER_FUNCTION,
  SQLCOM_SHOW_CREATE_PROC, SQLCOM_SHOW_CREATE_FUNC,
  SQLCOM_SHOW_STATUS_PROC, SQLCOM_SHOW_STATUS_FUNC,
  SQLCOM_PREPARE, SQLCOM_EXECUTE, SQLCOM_DEALLOCATE_PREPARE,
  SQLCOM_CREATE_VIEW, SQLCOM_DROP_VIEW,
  SQLCOM_CREATE_TRIGGER, SQLCOM_DROP_TRIGGER,
  SQLCOM_XA_START, SQLCOM_XA_END, SQLCOM_XA_PREPARE,
  SQLCOM_XA_COMMIT, SQLCOM_XA_ROLLBACK, SQLCOM_XA_RECOVER,
  SQLCOM_SHOW_PROC_CODE, SQLCOM_SHOW_FUNC_CODE,
  SQLCOM_ALTER_TABLESPACE,
  SQLCOM_INSTALL_PLUGIN, SQLCOM_UNINSTALL_PLUGIN,
  SQLCOM_SHOW_AUTHORS, SQLCOM_BINLOG_BASE64_EVENT,
  SQLCOM_SHOW_PLUGINS,
  SQLCOM_SHOW_CONTRIBUTORS,
  SQLCOM_CREATE_SERVER, SQLCOM_DROP_SERVER, SQLCOM_ALTER_SERVER,
  SQLCOM_CREATE_EVENT, SQLCOM_ALTER_EVENT, SQLCOM_DROP_EVENT,
  SQLCOM_SHOW_CREATE_EVENT, SQLCOM_SHOW_EVENTS,
  SQLCOM_SHOW_CREATE_TRIGGER,
  SQLCOM_ALTER_DB_UPGRADE,
  SQLCOM_SHOW_PROFILE, SQLCOM_SHOW_PROFILES,
  SQLCOM_SIGNAL, SQLCOM_RESIGNAL,
  SQLCOM_SHOW_RELAYLOG_EVENTS,
  /*
    When a command is added here, be sure it's also added in mysqld.cc
    in "struct show_var_st status_vars[]= {" ...
  */
  /* This should be the last !!! */
  SQLCOM_END

};