Hello guys,
I have a table cell that has a value of 0.000 as a result of a difference between two equal double values.
How can I query that table where cell_value=0 ? It doesn't return enithing.
Looks like int 0 is not equal with double 0.000. Is this a bug ?
Thank you.
Hi @michael.m11,
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The difference might be zero at the first visible digits. How do you know the two floating values are the same? Have you subtracted A from A and compared it with zero. Floating point values near zero are a bit imprecise if it comes to be exact zero. Maybe you can query to a range near zero like with the clause BETWEEN value1 AND value2.
See also https://en.wikipedia.org/wiki/Floating-point_arithmetic#Accuracy_problems
If you set a floating point value (such as a double) directly to 0, then it will compare to 0 just fine. If a double is the result of a mathematical calculation, it is unlikely to be precisely 0 and you shouldn't compare it to 0 using equality.
Instead of comparing a double to 0, compare whether its absolute value is less than a very small number.
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