Conversion from zero numeric literals to DECFLOAT results in incorrect value
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Key: CORE-5696
URL: http://tracker.firebirdsql.org/browse/CORE-5696
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 4.0 Alpha 1
Environment: Firebird-4.0.0.840-0_x64 (on Windows 10 x64)
Reporter: Mark Rotteveel
Zero numeric literals do not correctly convert to DECFLOAT (test with inserting
a value into a DECFLOAT(16) column).
literal => resulting decfloat value || expected decfloat value
-0 => 0 || -0
-0E300 => -0E-16 || -0E+300
-0E+300 => -0E-16 || -0E+300
-0.0E+300 => -0E-16 || -0E+300
0E300 => -0E-16 || 0E+300
0E+300 => -0E-16 || 0E+300
Using the equivalent string and casting that to DECFLOAT (decfloat(16) in my
tests) does result in the correct value.
However conversion from string to decfloat also has its problems:
'0.0E300' => 0E299 || 0E300 (or 0.0E300)
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