twalthr commented on a change in pull request #6815: [FLINK-7062][cep][table]
Added basic support for MATCH_RECOGNIZE
URL: https://github.com/apache/flink/pull/6815#discussion_r225568576
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/calcite/RelTimeIndicatorConverter.scala
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@@ -97,8 +97,46 @@ class RelTimeIndicatorConverter(rexBuilder: RexBuilder)
extends RelShuttle {
LogicalSort.create(input, sort.collation, sort.offset, sort.fetch)
}
- override def visit(`match`: LogicalMatch): RelNode =
- convertMatch(`match`)
+ override def visit(matchRel: LogicalMatch): RelNode = {
+ // visit children and update inputs
+ val input = matchRel.getInput.accept(this)
+
+ // check if input field contains time indicator type
+ // materialize field if no time indicator is present anymore
+ // if input field is already materialized, change to timestamp type
+ val materializer = new RexTimeIndicatorMaterializer(
+ rexBuilder,
+ input.getRowType.getFieldList.map(_.getType))
+
+ // update input expressions
+ val patternDefs =
matchRel.getPatternDefinitions.mapValues(_.accept(materializer))
+ val measures = matchRel.getMeasures.mapValues(_.accept(materializer))
+ val partitionKeys = matchRel.getPartitionKeys.map(_.accept(materializer))
+ val interval = if (matchRel.getInterval != null) {
+ matchRel.getInterval.accept(materializer)
+ } else {
+ null
+ }
+
+ // materialize all output types
+ // TODO allow passing through for rowtime accessor function, once
introduced
+ val output = materializerUtils.materializeTypes(matchRel.getRowType, _ =>
true)
Review comment:
Rename to `outputType`.
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