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53 commits

Author SHA1 Message Date
Igor Babaev
9055498634 Fixed several bugs for mwl #253. 
One of them is quite serious: the function table_cond_selectivity used
the TABLE_REF structure for ref/eq_ref access methods as if they had been
filled. In  fact these structure are filled after the best execution plan
has been chosen.

The other bugs happened due to:
- an erroneous attempt at get statistics on the result of materialization
  of a view
- incorrect handling of ranges with no left/right limits when calculating
  selectivity of range conditions on non-indexed columns
- lack of cleanup for some newly introduced fields
 2013-03-30 15:37:21 -07:00
Igor Babaev
1009832c13 Added histogams for table columns. 2013-03-25 23:48:29 -07:00
Igor Babaev
fc1c8ffdad The pilot patch for mwl#253. 2013-03-11 07:44:24 -07:00