sergefp@mysql.com 699291a8e6 BUG#14940 "MySQL choose wrong index", v.2 ...

- 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

2006-07-28 21:27:01 +04:00

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