## 35.16. Oracle Compatibility Mode

`ecpg` can be run in a so-called Oracle compatibility mode. If this mode is active, it tries to behave as if it were Oracle Pro*C.

Specifically, this mode changes `ecpg` in three ways:

- Pad character arrays receiving character string types with trailing spaces to the specified length

- Zero byte terminate these character arrays, and set the indicator variable if truncation occurs

- Set the null indicator to `-1` when character arrays receive empty character string types