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Make EXPLAIN FORMAT=JSON be able to show the key that's used for sorting.

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This will be useful for window functions development.
This commit is contained in:
Sergei Petrunia
2016-03-30 18:39:10 +03:00
parent 9b5951c383
commit 2078392cc9
7 changed files with 100 additions and 36 deletions
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12
sql/sql_select.cc
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@ -23746,7 +23746,6 @@ void JOIN_TAB::save_explain_data(Explain_table_access *eta,
explain_plan= eta;
eta->key.clear();
eta->quick_info= NULL;
eta->using_filesort= false;
SQL_SELECT *tab_select;
/*
@ -23758,9 +23757,8 @@ void JOIN_TAB::save_explain_data(Explain_table_access *eta,
if (filesort)
{
eta->using_filesort= true; // This fixes EXPLAIN
eta->fs_tracker= filesort->tracker=
new Filesort_tracker(thd->lex->analyze_stmt);
eta->pre_join_sort= new Explain_aggr_filesort(thd->lex->analyze_stmt);
eta->pre_join_sort->init(thd, filesort);
}
tracker= &eta->tracker;
@ -24201,9 +24199,9 @@ void save_agg_explain_data(JOIN *join, Explain_select *xpl_sel)
if (join_tab->filesort)
{
Explain_aggr_filesort *eaf = new Explain_aggr_filesort;
eaf->tracker= new Filesort_tracker(join->thd->lex->analyze_stmt);
join_tab->filesort->tracker= eaf->tracker;
bool is_analyze= join->thd->lex->analyze_stmt;
Explain_aggr_filesort *eaf = new Explain_aggr_filesort(is_analyze);
eaf->init(join->thd, join_tab->filesort);
prev_node= node;
node= eaf;