# 4678 Certain Un-Optimized Conditions Not Evaluating Properly when Standard NULL Behavior Off

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We're running EDB (currently 2.27b7) with StandardNullBehavior switched off, trying to maintain previous DBISAM behaviour with strings. We've recently discovered that numeric columns containing NULL will satisfy a test for less than 0 in a WHERE clause. It works as expected (NULL does not satisfy < 0) when we switch StandardNullBehavior on.