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MDEV-30806: ANALYZE FORMAT=JSON: better support for BNL and BNL-H joins

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In block-nl-join, add:

- r_loops - this shows how many incoming record combinations this
  query plan node had.

- r_effective_rows - this shows the average number of matching rows
  that this table had for each incoming record combination. This is
  comparable with r_rows in non-blocked access methods.
  For BNL-joins, it is always equal to
   $.table.r_rows * $.table.r_filtered
  For BNL-H joins the value cannot be computed from other values

Reviewed by: Monty <monty@mariadb.org>
This commit is contained in:
Sergei Petrunia
2023-03-07 19:49:57 +03:00
parent 169def14f6
commit dc1d6213f9
14 changed files with 279 additions and 30 deletions
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8
mysql-test/main/intersect.result
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@ -395,7 +395,9 @@ ANALYZE
"buffer_type": "flat",
"buffer_size": "256Kb",
"join_type": "BNL",
"r_filtered": 100
"r_loops": 3,
"r_filtered": 100,
"r_effective_rows": 3
}
}
}
@ -478,7 +480,9 @@ ANALYZE
"buffer_type": "flat",
"buffer_size": "256Kb",
"join_type": "BNL",
"r_filtered": 100
"r_loops": 3,
"r_filtered": 100,
"r_effective_rows": 3
}
}
}