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Merge

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This commit is contained in:
Igor Babaev
2010-12-28 12:25:33 -08:00
parent 0dc5ef87d4 dccc01a82a
commit ea7082aee2
2 changed files with 2 additions and 4 deletions
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3
sql/opt_range.cc
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@ -5711,8 +5711,7 @@ ROR_SCAN_INFO *make_ror_scan(const PARAM *param, int idx, SEL_ARG *sel_arg)
bitmap_set_bit(&ror_scan->covered_fields, key_part->fieldnr-1);
}
ror_scan->index_read_cost=
param->table->file->keyread_time(ror_scan->keynr, 1,
param->table->quick_rows[ror_scan->keynr]);
param->table->file->keyread_time(ror_scan->keynr, 1, ror_scan->records);
DBUG_RETURN(ror_scan);
}

3
sql/opt_range.h
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@ -515,8 +515,7 @@ public:
Current implementation doesn't detect all cases where index merge could
be used, in particular:
* index merge+'using index' is not supported (this the consequence of
the above restriction)
* index_merge+'using index' is not supported
* If WHERE part contains complex nested AND and OR conditions, some ways
to retrieve rows using index merge will not be considered. The choice