Igor Babaev 4dc963a9f3 Fixed LP bug #999251: Q13 from DBT3 uses table scan instead of covering index scan. ...

The optimizer chose a less efficient execution plan due to the following
defects of the code:
1. the generic handler function handler::keyread_time did not take into account
   that in clustered primary keys record data is included into each index entry
2. the function make_join_readinfo erroneously decided that index only scan
   could not be used if join cache was empoyed.

Added no additional test case.
Adjusted some of the test results.

2012-05-16 20:39:03 -07:00

82 KiB

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