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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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2
mysql-test/main/stat_tables.result
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@ -900,7 +900,7 @@ test t1 b 2 10 0.0000 4.0000 1.1111 0 NULL NULL
analyze
select * from t1 where a=1 and b=3;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 10.00 10.00 Using where
drop table t1;
set @@global.histogram_size=@save_histogram_size;
# End of 10.4 tests