Backport the fix olav.sandstaa@sun.com-20101102184747-qfuntqwj021imy9r:
"Fix for Bug#52660 Perf. regr. using ICP for MyISAM on range queries on an index containing TEXT"
(together with further fixes in that code) into MyISAM and Aria.
The function add_ref_to_table_cond missed updating the value of
join_tab->pre_idx_push_select_cond after having updated the value
of join_tab->select->pre_idx_push_select_cond.
The bug happened because in some cases the function JOIN::exec
did not save the value of TABLE::pre_idx_push_select_cond in
TABLE::select->pre_idx_push_select_cond for the sort table.
Noticed and fixed a bug in the function make_cond_remainder
that builds the remainder condition after extraction of an index
pushdown condition from the where condition. The code
erroneously assumed that the function make_cond_for_table left
the value of ICP_COND_USES_INDEX_ONLY in sub-condition markers.
Adjusted many result files from the regression test suite
after this fix .
The call of the virtual function cancel_pushed_idx_cond in the code of
the function test_if_skip_sort_order was misplaced when backporting the
fix for bug 58816.
3150 Olav Sandstaa 2010-05-07
Test cases for the following "ICP for InnoDB" bugs:
Bug#40992 InnoDB: Crash when engine_condition_pushdown is on
Bug#35080 Innodb crash at mem_block_get_len line 72
Bug#41996 multi-table delete crashes server (InnoDB table)
Bug#43448 Server crashes on multi table delete with Innodb
All these bugs are duplicates of either one or both of Bug 43360 or 36981.
(backporting of olav@sun.com-20100226091930-qxvakxmcp6463t5w)
