hequn8128 commented on a change in pull request #6787: [FLINK-8577][table]
Implement proctime DataStream to Table upsert conversion
URL: https://github.com/apache/flink/pull/6787#discussion_r235835262
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/calcite/RelTimeIndicatorConverter.scala
##########
@@ -165,7 +165,30 @@ class RelTimeIndicatorConverter(rexBuilder: RexBuilder)
extends RelShuttle {
override def visit(exchange: LogicalExchange): RelNode =
throw new TableException("Logical exchange in a stream environment is not
supported yet.")
- override def visit(scan: TableScan): RelNode = scan
+ override def visit(scan: TableScan): RelNode = {
+ val upsertStreamTable = scan.getTable.unwrap(classOf[UpsertStreamTable[_]])
+ val relTypes = scan.getRowType.getFieldList.map(_.getType)
+ val getTimeIndicatorIndexes = relTypes.zipWithIndex
+ .filter(e => FlinkTypeFactory.isTimeIndicatorType(e._1))
+ .map(_._2)
+ if (upsertStreamTable != null) {
+ val input = if (getTimeIndicatorIndexes.size > 0) {
+ // materialize time indicator
+ val rewrittenScan = scan.copy(scan.getTraitSet, scan.getInputs)
+ materializerUtils.projectAndMaterializeFields(rewrittenScan,
getTimeIndicatorIndexes.toSet)
+ } else {
+ scan
+ }
+
+ LogicalLastRow.create(
Review comment:
Year, It would be nice if we can. However, it is not easy to generate
LastRow in a Rule. For example, with the following rule:
```
class GenerateLastRowRule extends RelOptRule(
operand(classOf[TableScan], none),
"GenerateLastRowRule") {
...
}
```
The Rule will apply infinitly. Moreover, we can't write the rule with two
operands, because some plan may only contain one Scan node.
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