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EXPLAIN FORMAT=JSON: support EXPLAIN FORMAT=JSON INSERT ...

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This commit is contained in:
Sergei Petrunia
2014-11-29 03:28:46 +03:00
parent e235bb864d
commit c46eadb2b3
4 changed files with 60 additions and 8 deletions
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37
mysql-test/r/explain_json.result
View File

@ -343,7 +343,7 @@ EXPLAIN
}
drop table t1;
#
# Single-table UPDATE/DELETE
# Single-table UPDATE/DELETE, INSERT
#
explain format=json delete from t0;
EXPLAIN
@ -393,6 +393,41 @@ EXPLAIN
}
}
}
explain format=json insert into t0 values (1);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t0"
}
}
}
create table t1 like t0;
explain format=json insert into t1 values ((select max(a) from t0));
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1"
},
"subqueries": [
{
"query_block": {
"select_id": 2,
"table": {
"table_name": "t0",
"access_type": "ALL",
"rows": 10,
"filtered": 100
}
}
}
]
}
}
drop table t1;
#
# A derived table
#

9
mysql-test/t/explain_json.test
View File

@ -71,7 +71,7 @@ select * from t1 tbl1, t1 tbl2 where tbl1.a=tbl2.a and tbl1.b < 3 and tbl2.b < 5
drop table t1;
--echo #
--echo # Single-table UPDATE/DELETE
--echo # Single-table UPDATE/DELETE, INSERT
--echo #
explain format=json delete from t0;
explain format=json delete from t0 where 1 > 2;
@ -80,6 +80,13 @@ explain format=json delete from t0 where a < 3;
explain format=json update t0 set a=3 where a in (2,3,4);
explain format=json insert into t0 values (1);
create table t1 like t0;
explain format=json insert into t1 values ((select max(a) from t0));
drop table t1;
--echo #
--echo # A derived table
--echo #

19
sql/sql_explain.cc
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@ -194,10 +194,7 @@ void Explain_query::print_explain_json(select_result_sink *output, bool is_analy
if (upd_del_plan)
upd_del_plan->print_explain_json(this, &writer, is_analyze);
else if (insert_plan)
{
//insert_plan->print_explain(this, output, explain_flags, is_analyze);
DBUG_ASSERT(0);
}
insert_plan->print_explain_json(this, &writer, is_analyze);
else
{
/* Start printing from node with id=1 */
@ -1808,6 +1805,20 @@ int Explain_insert::print_explain(Explain_query *query,
return print_explain_for_children(query, output, explain_flags, is_analyze);
}
void Explain_insert::print_explain_json(Explain_query *query,
Json_writer *writer, bool is_analyze)
{
Json_writer_nesting_guard guard(writer);
writer->add_member("query_block").start_object();
writer->add_member("select_id").add_ll(1);
writer->add_member("table").start_object();
writer->add_member("table_name").add_str(table_name.c_ptr());
writer->end_object(); // table
print_explain_json_for_children(query, writer, is_analyze);
writer->end_object(); // query_block
}
void delete_explain_query(LEX *lex)
{

3
sql/sql_explain.h
View File

@ -704,8 +704,7 @@ public:
int print_explain(Explain_query *query, select_result_sink *output,
uint8 explain_flags, bool is_analyze);
void print_explain_json(Explain_query *query, Json_writer *writer,
bool is_analyze)
{ /* EXPLAIN_JSON_NOT_IMPL */}
bool is_analyze);
};