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MDEV-18478 ANALYZE for statement should show selectivity of ICP, part#2

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Part#2, variant 2: Make the printed r_ values in JSON output consistent.
After this patch, ANALYZE output has:

- r_index_rows (NEW) - Observed number of rows before ICP or Rowid Filtering
  checks. This is a per-scan average. like r_rows and "rows" are.

- r_rows (AS BEFORE) - Observed number of rows after ICP and Rowid Filtering.

- r_icp_filtered (NEW) - Observed selectivity of ICP condition.

- (AS BEFORE) observed selectivity of Rowid Filter is in
  $.rowid_filter.r_selectivity_pct

- r_total_filtered - Observed combined selectivity: fraction of rows left
  after applying ICP condition, Rowid Filter, and attached_condition.
  This is now comparable with "filtered" and is printed right after it.

- r_filtered (AS BEFORE) - Observed selectivity of "attached_condition".

Tabular ANALYZE output is not changed. Note that JSON's r_filtered and
r_rows have the same meanings as before and have the same meaning as in
tabular output.
This commit is contained in:
Sergei Petrunia
2024-02-26 11:32:38 +03:00
parent e87d1e391b
commit 0940a96940
32 changed files with 912 additions and 449 deletions
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23
mysql-test/main/explain_json.result
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@ -1311,6 +1311,7 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"r_filtered": 100,
"using_index_for_group_by": true
}
@ -1721,6 +1722,7 @@ ANALYZE
"r_rows": null,
"r_engine_stats": REPLACED,
"filtered": 0,
"r_total_filtered": null,
"r_filtered": null,
"impossible_on_condition": true
}
@ -1738,6 +1740,7 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"r_filtered": 100
}
}
@ -1815,6 +1818,7 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"r_filtered": 100
}
},
@ -1836,8 +1840,9 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_filtered": 100,
"r_total_filtered": 100,
"attached_condition": "trigcond(t2.pk is null) and trigcond(trigcond(t1.a is not null))",
"r_filtered": 100,
"using_index": true,
"not_exists": true
}
@ -1919,8 +1924,9 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_filtered": 100,
"attached_condition": "t1.a is not null"
"r_total_filtered": 100,
"attached_condition": "t1.a is not null",
"r_filtered": 100
}
},
{
@ -1941,6 +1947,7 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_total_filtered": 100,
"r_filtered": 100,
"using_index": true,
"distinct": true
@ -2039,8 +2046,9 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_filtered": 100,
"attached_condition": "t3.a is not null"
"r_total_filtered": 100,
"attached_condition": "t3.a is not null",
"r_filtered": 100
}
},
{
@ -2062,8 +2070,9 @@ ANALYZE
"r_other_time_ms": "REPLACED",
"r_engine_stats": REPLACED,
"filtered": 100,
"r_filtered": 100,
"index_condition_bka": "t4.b + 1 <= t3.b + 1"
"r_total_filtered": 100,
"index_condition_bka": "t4.b + 1 <= t3.b + 1",
"r_filtered": 100
},
"buffer_type": "flat",
"buffer_size": "400",