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prefer hash indexes over skiplists if everything else is the same

This commit is contained in:
Jan Steemann 2012-05-16 19:35:19 +02:00
parent 883bfd7cc0
commit 88efe0f6fc
1 changed files with 1 additions and 0 deletions
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Ahuacatl/ahuacatl-index.c
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@ -99,6 +99,7 @@ static TRI_aql_index_t* PickIndex (TRI_aql_context_t* const context,
}
else {
isBetter = idx->_type == TRI_IDX_TYPE_PRIMARY_INDEX || // primary index is better than any others
(idx->_type == TRI_IDX_TYPE_HASH_INDEX && pickedIndex->_idx->_type == TRI_IDX_TYPE_SKIPLIST_INDEX) || // hash is better than skiplist
(idx->_unique && !pickedIndex->_idx->_unique) || // unique indexes are better than non-unique ones
(fieldAccesses->_length < pickedIndex->_fieldAccesses->_length && idx->_unique) || // shorter indexes are better if unique
(fieldAccesses->_length > pickedIndex->_fieldAccesses->_length && !idx->_unique); // longer indexes are better if non-unique