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Merge 10.11 into 11.0

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This commit is contained in:
Sergei Petrunia
2023-04-14 17:40:41 +03:00
parent 8e55d7ea4a 656c2e18b1
commit c7fe8e51de
376 changed files with 13245 additions and 7395 deletions
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42
sql/sql_explain.cc
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@@ -188,7 +188,7 @@ void Explain_query::notify_tables_are_closed()
Send EXPLAIN output to the client.
*/
int Explain_query::send_explain(THD *thd)
int Explain_query::send_explain(THD *thd, bool extended)
{
select_result *result;
LEX *lex= thd->lex;
@@ -201,8 +201,22 @@ int Explain_query::send_explain(THD *thd)
if (thd->lex->explain_json)
print_explain_json(result, thd->lex->analyze_stmt, false /*is_show_cmd*/);
else
{
res= print_explain(result, lex->describe, thd->lex->analyze_stmt);
if (extended)
{
char buff[1024];
String str(buff,(uint32) sizeof(buff), system_charset_info);
str.length(0);
/*
The warnings system requires input in utf8, @see
mysqld_show_warnings().
*/
lex->unit.print(&str, QT_EXPLAIN_EXTENDED);
push_warning(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_YES, str.c_ptr_safe());
}
}
if (res)
result->abort_result_set();
else
@@ -212,6 +226,7 @@ int Explain_query::send_explain(THD *thd)
}
/*
The main entry point to print EXPLAIN of the entire query
*/
@@ -2027,7 +2042,8 @@ void Explain_table_access::print_explain_json(Explain_query *query,
if (is_analyze)
{
//writer->add_member("r_loops").add_ll(jbuf_tracker.get_loops());
writer->add_member("r_loops").add_ll(jbuf_loops_tracker.get_loops());
writer->add_member("r_filtered");
if (jbuf_tracker.has_scans())
writer->add_double(jbuf_tracker.get_filtered_after_where()*100.0);
@@ -2036,6 +2052,26 @@ void Explain_table_access::print_explain_json(Explain_query *query,
writer->add_member("r_unpack_time_ms");
writer->add_double(jbuf_unpack_tracker.get_time_ms());
writer->add_member("r_other_time_ms").
add_double(jbuf_extra_time_tracker.get_time_ms());
/*
effective_rows is average number of matches we got for an incoming
row. The row is stored in the join buffer and then is read
from there, possibly multiple times. We can't count this number
directly. Infer it as:
total_number_of_row_combinations_considered / r_loops.
*/
writer->add_member("r_effective_rows");
if (jbuf_loops_tracker.has_scans())
{
double loops= (double)jbuf_loops_tracker.get_loops();
double row_combinations= (double)jbuf_tracker.r_rows;
writer->add_double(row_combinations / loops);
}
else
writer->add_null();
}
}