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EXPLAIN FORMAT=JSON: support join buffering

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- Basic support for JOIN buffering
- The output is not polished but catches the main point:
  tab->select_cond and tab->cache_select->cond are printed separately.
- Hash join support is poor still.

- Also fixed identation in JOIN_TAB::save_explain_data
This commit is contained in:
Sergei Petrunia
2014-11-27 23:10:44 +03:00
parent 37c444e1a0
commit 461dbd80d2
5 changed files with 97 additions and 12 deletions
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14
sql/sql_select.cc
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@ -23650,10 +23650,10 @@ void JOIN_TAB::save_explain_data(Explain_table_access *eta, table_map prefix_tab
if (keyno != MAX_KEY && keyno == table->file->pushed_idx_cond_keyno &&
table->file->pushed_idx_cond)
{
{
eta->push_extra(ET_USING_INDEX_CONDITION);
eta->pushed_index_cond= table->file->pushed_idx_cond;
}
eta->pushed_index_cond= table->file->pushed_idx_cond;
}
else if (tab->cache_idx_cond)
eta->push_extra(ET_USING_INDEX_CONDITION_BKA);
@ -23683,11 +23683,11 @@ void JOIN_TAB::save_explain_data(Explain_table_access *eta, table_map prefix_tab
eta->push_extra(ET_USING_WHERE_WITH_PUSHED_CONDITION);
}
else
{
eta->where_cond= tab->select->cond? tab->select->cond:
tab->cache_select->cond;
{
eta->where_cond= tab->select->cond;
eta->cache_cond= tab->cache_select? tab->cache_select->cond : NULL;
eta->push_extra(ET_USING_WHERE);
}
}
}
}
if (table_list /* SJM bushes don't have table_list */ &&