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[SHOW] EXPLAIN UPDATE/DELETE, code re-structuring

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- Let Query Plan Footprint store join buffer type 
  in binary form, not string.
- Same for LooseScan type.
This commit is contained in:
Sergey Petrunya
2013-06-27 17:56:49 +04:00
parent 5422098b75
commit befacafd73
6 changed files with 45 additions and 37 deletions
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35
sql/sql_join_cache.cc
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@ -2568,34 +2568,26 @@ finish:
none
*/
void JOIN_CACHE::print_explain_comment(String *str)
void JOIN_CACHE::save_qpf(struct st_qpf_bka_type *qpf)
{
str->append(STRING_WITH_LEN(" ("));
const char *buffer_type= prev_cache ? "incremental" : "flat";
str->append(buffer_type);
str->append(STRING_WITH_LEN(", "));
const char *join_alg="";
qpf->incremental= test(prev_cache);
switch (get_join_alg()) {
case BNL_JOIN_ALG:
join_alg= "BNL";
qpf->join_alg= "BNL";
break;
case BNLH_JOIN_ALG:
join_alg= "BNLH";
qpf->join_alg= "BNLH";
break;
case BKA_JOIN_ALG:
join_alg= "BKA";
qpf->join_alg= "BKA";
break;
case BKAH_JOIN_ALG:
join_alg= "BKAH";
qpf->join_alg= "BKAH";
break;
default:
DBUG_ASSERT(0);
}
str->append(join_alg);
str->append(STRING_WITH_LEN(" join"));
str->append(STRING_WITH_LEN(")"));
}
/**
@ -2621,18 +2613,17 @@ static void add_mrr_explain_info(String *str, uint mrr_mode, handler *file)
}
}
void JOIN_CACHE_BKA::print_explain_comment(String *str)
void JOIN_CACHE_BKA::save_qpf(struct st_qpf_bka_type *qpf)
{
JOIN_CACHE::print_explain_comment(str);
add_mrr_explain_info(str, mrr_mode, join_tab->table->file);
JOIN_CACHE::save_qpf(qpf);
add_mrr_explain_info(&qpf->mrr_type, mrr_mode, join_tab->table->file);
}
void JOIN_CACHE_BKAH::print_explain_comment(String *str)
void JOIN_CACHE_BKAH::save_qpf(struct st_qpf_bka_type *qpf)
{
JOIN_CACHE::print_explain_comment(str);
add_mrr_explain_info(str, mrr_mode, join_tab->table->file);
JOIN_CACHE::save_qpf(qpf);
add_mrr_explain_info(&qpf->mrr_type, mrr_mode, join_tab->table->file);
}