Method resolve

sql/opt_hints_parser.cc:317–445

Resolve a parsed table level hint, i.e. set up proper Opt_hint_* structures which will be used later during query preparation and optimization. @return false: no critical errors, warnings on duplicated hints, unresolved query block names, etc. are allowed true: critical error (like OOM), break further hints processing */

          true: critical error (like OOM), break further hints processing
*/
bool Parser::Table_level_hint::resolve(Parse_context *pc) const
{
  const Table_level_hint_type &table_level_hint_type= *this;
  opt_hints_enum hint_type;
  bool hint_state; // ON or OFF

  switch (table_level_hint_type.id())
  {
  case TokenID::keyword_BNL:
    hint_type= BNL_HINT_ENUM;
    hint_state= true;
    break;
  case TokenID::keyword_NO_BNL:
    hint_type= BNL_HINT_ENUM;
    hint_state= false;
    break;
  case TokenID::keyword_BKA:
    hint_type= BKA_HINT_ENUM;
    hint_state= true;
    break;
  case TokenID::keyword_NO_BKA:
    hint_type= BKA_HINT_ENUM;
    hint_state= false;
    break;
  case TokenID::keyword_DERIVED_CONDITION_PUSHDOWN:
    hint_type= DERIVED_CONDITION_PUSHDOWN_HINT_ENUM;
    hint_state= true;
    break;
  case TokenID::keyword_NO_DERIVED_CONDITION_PUSHDOWN:
    hint_type= DERIVED_CONDITION_PUSHDOWN_HINT_ENUM;
    hint_state= false;
    break;
  case TokenID::keyword_MERGE:
    hint_type= MERGE_HINT_ENUM;
    hint_state= true;
    break;
  case TokenID::keyword_NO_MERGE:
    hint_type= MERGE_HINT_ENUM;
    hint_state= false;
    break;
  case TokenID::keyword_SPLIT_MATERIALIZED:
    hint_type= SPLIT_MATERIALIZED_HINT_ENUM;
    hint_state= true;
    break;
  case TokenID::keyword_NO_SPLIT_MATERIALIZED:
    hint_type= SPLIT_MATERIALIZED_HINT_ENUM;
    hint_state= false;
    break;
  default:
    DBUG_ASSERT(0);
    return true;
  }

  if (const At_query_block_name_opt_table_name_list &
          at_query_block_name_opt_table_name_list= *this)
  {
    // this is @ query_block_name opt_table_name_list
    const Lex_ident_sys qb_name_sys= Query_block_name::to_ident_sys(pc->thd);