using c++ builder 10.3.2, unidac 9.2.1.
I have an oracle table with column number (20) populated with numbers having 17 digits
2558716, 40611005002558720
2558717, 40611005002558720
2558718, 40611005002558720
2558719, 40611005002558720
2558720, 40611005002558720
2558721, 40611005002558720
2558722, 40711035002558728
2558723, 40711035002558728
2558724, 40711035002558728
2558725, 40711035002558728
2558726, 40711035002558728
2558727, 40711035002558728
2558728, 41425072002558728
2558729, 41425072002558728
2558730, 41425072002558728
2558731, 41425072002558728
2558732, 41425072002558728
2558733, 50234022002558728
2558734, 50234022002558728
2558735, 50234022002558736
2558736, 50234022002558736
2558737, 51073066002558736
2558738, 51073066002558736
2558739, 51073066002558736
2558740, 51073066002558736
2558741, 51073066002558744 Sample code attached.