Function udf_init

sql/sql_udf.cc:146–282

*/

void udf_init()
{
  udf_func *tmp;
  TABLE_LIST tables;
  READ_RECORD read_record_info;
  TABLE *table;
  int error;
  DBUG_ENTER("ufd_init");

  if (initialized || opt_noacl)
    DBUG_VOID_RETURN;

#ifdef HAVE_PSI_INTERFACE
  init_udf_psi_keys();
#endif

  mysql_rwlock_init(key_rwlock_THR_LOCK_udf, &THR_LOCK_udf);

  init_sql_alloc(key_memory_udf_mem, &mem, UDF_ALLOC_BLOCK_SIZE, 0, MYF(0));
  THD *new_thd = new THD(0);
  if (!new_thd ||
      my_hash_init(key_memory_udf_mem, &udf_hash,
                   Lex_ident_routine::charset_info(),
                   32,0,0,get_hash_key, NULL, 0))
  {
    sql_print_error("Can't allocate memory for udf structures");
    my_hash_free(&udf_hash);
    free_root(&mem,MYF(0));
    delete new_thd;
    DBUG_VOID_RETURN;
  }
  initialized = 1;
  new_thd->thread_stack= (void*) &new_thd;      // Big stack
  new_thd->store_globals();
  new_thd->set_query_inner((char*) STRING_WITH_LEN("intern:udf_init"),
                           default_charset_info);
  new_thd->set_db(&MYSQL_SCHEMA_NAME);

  tables.init_one_table(&new_thd->db, &MYSQL_FUNC_NAME, 0, TL_READ);

  if (open_and_lock_tables(new_thd, &tables, FALSE, MYSQL_LOCK_IGNORE_TIMEOUT))
  {
    DBUG_PRINT("error",("Can't open udf table"));
    sql_print_error("Can't open the mysql.func table. Please "
                    "run mysql_upgrade to create it.");
    goto end;
  }

  table= tables.table;
  if (init_read_record(&read_record_info, new_thd, table, NULL, NULL, 1, 0,
                       FALSE))
  {
    sql_print_error("Could not initialize init_read_record; udf's not "
                    "loaded");
    goto end;
  }

  table->use_all_columns();