twalthr commented on code in PR #27929:
URL: https://github.com/apache/flink/pull/27929#discussion_r3094534101
##########
flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/inference/SystemTypeInference.java:
##########
@@ -374,14 +375,20 @@ private List<Field> deriveRowtimeField(CallContext
callContext) {
if (!staticArg.is(StaticArgumentTrait.TABLE)) {
return;
}
+ final String argName = staticArg.getName();
final RowType rowType =
LogicalTypeUtils.toRowType(args.get(pos).getLogicalType());
final int onTimeColumn =
- findUniqueOnTimeColumn(
- staticArg.getName(), rowType,
onTimeFields);
+ findUniqueOnTimeColumn(argName,
rowType, onTimeFields);
if (onTimeColumn >= 0) {
usedOnTimeFields.add(rowType.getFieldNames().get(onTimeColumn));
onTimeColumns.add(rowType.getTypeAt(onTimeColumn));
+ // If ORDER BY is defined, it must match
the on_time column
Review Comment:
I don't think SQL forbids this. What does DB2 or MySql do in this case?
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