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Return >= 1 from matching_candidates_in_table if records > 0.0

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Having rows >= 1.0 helps ensure that when we calculate total rows of joins
the number of resulting rows will not be less after the join.

Changes in test cases:
- Join order change for some tables with few records
- 'Filtered' is much higher for tables with few rows, as 1 row is a high
  procent of a table with few rows.
This commit is contained in:
Monty
2021-10-08 01:40:59 +03:00
committed by Sergei Petrunia
parent b67144893a
commit bc9805e954
14 changed files with 50 additions and 39 deletions
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4
mysql-test/main/selectivity_innodb.result
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@ -77,8 +77,8 @@ and r_name = 'ASIA'
order by
s_acctbal desc, n_name, s_name, p_partkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 0.31 Using where; Using temporary; Using filesort
1 PRIMARY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using temporary; Using filesort
1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 0.50 Using where; Using join buffer (flat, BNL join)
1 PRIMARY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00 Using where
1 PRIMARY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
1 PRIMARY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where