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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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5
mysql-test/main/explain_json_innodb.result
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@ -16,12 +16,14 @@ EXPLAIN
{
"query_block": {
"select_id": 1,
"cost": "COST_REPLACED",
"nested_loop": [
{
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 2,
"cost": "COST_REPLACED",
"filtered": 100
}
}
@ -30,12 +32,14 @@ EXPLAIN
{
"query_block": {
"select_id": 2,
"cost": "COST_REPLACED",
"nested_loop": [
{
"table": {
"table_name": "tbl_alias1",
"access_type": "ALL",
"rows": 1,
"cost": "COST_REPLACED",
"filtered": 100,
"attached_condition": "tbl_alias1.column_name_2 is not null and tbl_alias1.column_name_1 is not null"
}
@ -53,6 +57,7 @@ EXPLAIN
"test.tbl_alias1.column_name_1"
],
"rows": 1,
"cost": "COST_REPLACED",
"filtered": 100,
"attached_condition": "tbl_alias2.c = tbl_alias1.column_name_2"
}