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BUG#14940 "MySQL choose wrong index", v.2

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- Make the range-et-al optimizer produce E(#table records after table 
                                           condition is applied),
- Make the join optimizer use this value,
- Add "filtered" column to EXPLAIN EXTENDED to show 
  fraction of records left after table condition is applied
- Adjust test results, add comments
This commit is contained in:
sergefp@mysql.com
2006-07-28 21:27:01 +04:00
parent 1459784aba
commit 699291a8e6
75 changed files with 942 additions and 683 deletions
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4
mysql-test/r/rpl_get_lock.result
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@@ -22,8 +22,8 @@ select is_free_lock("lock"), is_used_lock("lock") = connection_id();
is_free_lock("lock") is_used_lock("lock") = connection_id()
0 1
explain extended select is_free_lock("lock"), is_used_lock("lock");
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select sql_no_cache is_free_lock(_latin1'lock') AS `is_free_lock("lock")`,is_used_lock(_latin1'lock') AS `is_used_lock("lock")`
select is_free_lock("lock2");