Function mysql_drop_function_internal

sql/sql_udf.cc:483–502

Drop user defined function. @param thd Thread handler. @param udf Existing udf_func pointer which is to be deleted. @param table mysql.func table reference (opened and locked) Assumption - udf is not null. - table is already opened and locked */

  - table is already opened and locked
*/
static int mysql_drop_function_internal(THD *thd, udf_func *udf, TABLE *table)
{
  DBUG_ENTER("mysql_drop_function_internal");

  const LEX_CSTRING exact_name= udf->name;

  del_udf(udf);
  /*
    Close the handle if this was function that was found during boot or
    CREATE FUNCTION and it's not in use by any other udf function
  */
  if (udf->dlhandle && !find_udf_dl(udf->dl))
    dlclose(udf->dlhandle);

  if (!table)
    DBUG_RETURN(1);

  bool ret= remove_udf_in_table(exact_name, table);
  DBUG_RETURN(ret);
}


static TABLE *open_udf_func_table(THD *thd)