Function parse_sql

sql/sql_parse.cc:2437–2495

*/

bool parse_sql(THD *thd,
               Parser_state *parser_state,
               Object_creation_ctx *creation_ctx)
{
  bool ret_value;
  DBUG_ASSERT(thd->m_parser_state == NULL);
  DBUG_ASSERT(thd->lex->m_sql_cmd == NULL);

  MYSQL_QUERY_PARSE_START(thd->query());
  /* Backup creation context. */

  Object_creation_ctx *backup_ctx= NULL;

  if (creation_ctx)
    backup_ctx= creation_ctx->set_n_backup(thd);

  /* Set parser state. */

  thd->m_parser_state= parser_state;

#ifdef HAVE_PSI_STATEMENT_DIGEST_INTERFACE
  /* Start Digest */
  thd->m_parser_state->m_lip.m_digest_psi= MYSQL_DIGEST_START(thd->m_statement_psi);
#endif

  /* Parse the query. */

  bool mysql_parse_status= MYSQLparse(thd) != 0;

  /*
    Check that if MYSQLparse() failed either thd->is_error() is set, or an
    internal error handler is set.

    The assert will not catch a situation where parsing fails without an
    error reported if an error handler exists. The problem is that the
    error handler might have intercepted the error, so thd->is_error() is
    not set. However, there is no way to be 100% sure here (the error
    handler might be for other errors than parsing one).
  */

  DBUG_ASSERT(!mysql_parse_status ||
              (mysql_parse_status && thd->is_error()) ||
              (mysql_parse_status && thd->get_internal_handler()));

  /* Reset parser state. */

  thd->m_parser_state= NULL;

  /* Restore creation context. */

  if (creation_ctx)
    creation_ctx->restore_env(thd, backup_ctx);

  /* That's it. */

  ret_value= mysql_parse_status || thd->is_fatal_error;
  MYSQL_QUERY_PARSE_DONE(ret_value);
  return ret_value;