Function ha_delete_table

sql/handler.cc:3584–3639

*/

int ha_delete_table(THD *thd, handlerton *hton, const char *path,
                    const LEX_CSTRING *db, const LEX_CSTRING *alias,
                    bool generate_warning)
{
  int error;
  bool is_error= thd->is_error();
  DBUG_ENTER("ha_delete_table");

  /* hton is NULL in ALTER TABLE when renaming only .frm files */
  if (hton == NULL || hton == view_pseudo_hton)
    DBUG_RETURN(0);

  if (ha_check_if_updates_are_ignored(thd, hton, "DROP"))
    DBUG_RETURN(0);

  error= hton->drop_table(hton, path);
  if (error > 0)
  {
    /*
      It's not an error if the table doesn't exist in the engine.
      warn the user, but still report DROP being a success
    */
    bool intercept= non_existing_table_error(error);

    if ((!intercept || generate_warning) && ! thd->is_error())
    {
      TABLE dummy_table;
      TABLE_SHARE dummy_share;
      handler *file= get_new_handler(nullptr, thd->mem_root, hton);
      if (file) {
        bzero((char*) &dummy_table, sizeof(dummy_table));
        bzero((char*) &dummy_share, sizeof(dummy_share));
        dummy_share.path.str= (char*) path;
        dummy_share.path.length= strlen(path);
        dummy_share.normalized_path= dummy_share.path;
        dummy_share.db= Lex_ident_db(*db);
        dummy_share.table_name= Lex_ident_table(*alias);
        dummy_table.s= &dummy_share;
        dummy_table.alias.set(alias->str, alias->length, table_alias_charset);
        file->change_table_ptr(&dummy_table, &dummy_share);
        file->print_error(error, MYF(intercept ? ME_WARNING : 0));
        delete file;
      }
    }
    if (intercept)
    {
      /* Clear error if we got it in this function */
      if (!is_error)
        thd->clear_error();
      error= -1;
    }
  }
  if (error)
    DBUG_PRINT("exit", ("error: %d", error));
  DBUG_RETURN(error);
}

/****************************************************************************