Revert "Made a clever attempt to narrow the number of columns searched."
Revert "Made a clever attempt to narrow the number of columns searched."

This reverts commit 37c596365475ed25d43bd0cb2867b5a05e6b4c3e.

Not clever enough... the change actually *lowered* performance.
gcross/LogicGrowsOnTrees,gcross/LogicGrowsOnTrees