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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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8
mysql-test/main/innodb_ext_key.result
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@ -759,12 +759,13 @@ PRIMARY KEY (pk1,pk2),
KEY(f2)
) ENGINE=InnoDB CHARSET utf8 ROW_FORMAT= DYNAMIC;
INSERT INTO t1 VALUES (1,2,'2','abc'),(2,3,'3','def');
explain format= json
explain format=json
select * from t1 force index(f2) where pk1 <= 5 and pk2 <=5 and f2 = 'abc' and f1 <= '3';
EXPLAIN
{
"query_block": {
"select_id": 1,
"cost": "COST_REPLACED",
"nested_loop": [
{
"table": {
@ -775,6 +776,7 @@ EXPLAIN
"key_length": "3070",
"used_key_parts": ["f2", "pk1"],
"rows": 1,
"cost": "COST_REPLACED",
"filtered": 100,
"index_condition": "t1.pk1 <= 5 and t1.pk2 <= 5 and t1.f2 = 'abc'",
"attached_condition": "t1.f1 <= '3'"
@ -793,12 +795,13 @@ PRIMARY KEY (pk1,pk2),
KEY k1(pk1,f2)
) ENGINE=InnoDB CHARSET utf8 ROW_FORMAT= DYNAMIC;
INSERT INTO t1 VALUES (1,2,'2','abc'),(2,3,'3','def');
explain format= json
explain format=json
select * from t1 force index(k1) where f2 <= 5 and pk2 <=5 and pk1 = 'abc' and f1 <= '3';
EXPLAIN
{
"query_block": {
"select_id": 1,
"cost": "COST_REPLACED",
"nested_loop": [
{
"table": {
@ -809,6 +812,7 @@ EXPLAIN
"key_length": "3011",
"used_key_parts": ["pk1", "f2", "pk2"],
"rows": 1,
"cost": "COST_REPLACED",
"filtered": 100,
"index_condition": "t1.f2 <= 5 and t1.pk2 <= 5 and t1.pk1 = 'abc'",
"attached_condition": "t1.f1 <= '3'"