Decimal precision seems limited

Further investigation shows a little more strangeness... if you open a blank expression editor and put in todecimal(1.2345678901234567890) and test the rule, you'll see the rounding you're referring to. However if you then select "Expression" instead of "Formatted" you'll see a longer but still truncated value. This value has about 17 digits, which is more appropriate for a double precision floating point.

I don't know why the Formatted view is truncating it to a single precision. And when displaying it in a text field you don't have the option to change how the value is shown so this is still an issue.

Further investigation shows a little more strangeness... if you open a blank expression editor and put in todecimal(1.2345678901234567890) and test the rule, you'll see the rounding you're referring to. However if you then select "Expression" instead of "Formatted" you'll see a longer but still truncated value. This value has about 17 digits, which is more appropriate for a double precision floating point.

I don't know why the Formatted view is truncating it to a single precision. And when displaying it in a text field you don't have the option to change how the value is shown so this is still an issue.