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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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mysql-test/main/statistics_json.result
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@ -8338,12 +8338,14 @@ EXPLAIN
{
"query_block": {
"select_id": 1,
"cost": "COST_REPLACED",
"nested_loop": [
{
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 18,
"cost": "COST_REPLACED",
"filtered": 5.555555344,
"attached_condition": "t1.a > 'y'"
}