Hi,
I was looking at 0004-COPY_IGNORE_ERRORS.patch
+ * Ignore constraints if IGNORE_ERRORS is enabled
+ */
+static void
+safeExecConstraints(CopyFromState cstate, ResultRelInfo *resultRelInfo, TupleTableSlot *myslot, EState *estate)
I think the existing ExecConstraints() can be expanded by checking cstate->opts.ignore_errors so that it can selectively ignore Constraint Violations.
This way you don't need safeExecConstraints().
Cheers