Autoinc column does not necessarily need to be the first column in the table

[jedrz]

I noticed an error when getting generated key that is not the first column in the table. I think the rs.getObject(1) in the following line https://github.com/JetBrains/Exposed/blob/master/src/main/kotlin/org/jetbrains/exposed/sql/statements/InsertStatement.kt#L27 should be replaced with rs.getObject(firstAutoIncColumn.name).

I think I can provide a corresponding MR with the fix in couple of days. What do you think? The fix seems to be trivial so please let me know if I should do so.

[Tapac]

Not all database returns ResultSet with named columns, e.g. MySQL throws Column 'id' not found. because name of the column is `GENERATED_KEY. But i'll will try to keep both behaviors.

[jedrz]

Thank you fixing this issue!