zstan commented on PR #12932:
URL: https://github.com/apache/ignite/pull/12932#issuecomment-4160253295
But if we will mesure this:
```
String sql = "SELECT p.deptid AS person_id, p.name AS person_name,
o.deptid AS department_id " +
"FROM (SELECT DISTINCT * FROM dept) p " +
"LEFT JOIN emp o ON p.deptid = o.deptid " +
"WHERE o.name = 'Department 5'";
```
it shows :
```
master
Benchmark (engine) Mode Cnt
Score Error Units
JmhSqlJoinBenchmark.leftJoinDistinctRegression H2 thrpt 10
399.412 ± 6.949 ops/s
pr
JmhSqlJoinBenchmark.leftJoinDistinctRegression H2 thrpt 10
182.273 ± 6.474 ops/s
```
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