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From "Tea Yu" <>
Subject Re: multifield-boolean vs singlefield-enum query performance
Date Mon, 04 Oct 2004 01:45:37 GMT

For the following implementations:

1) storing boolean strings in fields X and Y separately
2) storing the same info in a field XY as 3 enums: X, Y, B, N meaning only X
is True, only Y is True, both are True or both are False

Is there significant performance gain when we substitute "X:T OR Y:T" by
"XY:B", while significant loss in "X:T" by "XY:X OR XY:B"?  Or are they



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