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MDEV-30032: EXPLAIN FORMAT=JSON output: print costs

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Basic printout for join and table execution costs.
This commit is contained in:
Sergei Petrunia
2022-11-19 21:00:23 +03:00
parent 657868f5e7
commit ffe0beca25
91 changed files with 3441 additions and 18 deletions
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9
sql/sql_explain.cc
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@@ -1033,6 +1033,9 @@ void Explain_select::print_explain_json(Explain_query *query,
writer->add_member("select_id").add_ll(select_id);
add_linkage(writer);
if (cost != 0.0)
writer->add_member("cost").add_double(cost);
if (is_analyze && time_tracker.get_loops())
{
writer->add_member("r_loops").add_ll(time_tracker.get_loops());
@@ -1942,7 +1945,13 @@ void Explain_table_access::print_explain_json(Explain_query *query,
else
writer->add_null();
}
}
if (cost != 0.0)
writer->add_member("cost").add_double(cost);
if (is_analyze)
{
if (op_tracker.get_loops())
{
double total_time= op_tracker.get_time_ms();