ygerzhedovich commented on code in PR #7399:
URL: https://github.com/apache/ignite-3/pull/7399#discussion_r2687106907
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modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/PlannerHelper.java:
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@@ -231,6 +242,34 @@ public static IgniteRel optimize(SqlNode sqlNode,
IgnitePlanner planner) {
}
}
+ private static RelNode tryDecorrelate(IgnitePlanner planner, RelNode rel) {
+ try {
+ // Currently, RelDecorrelator emits incorrect plan if the same
correlation id is used
+ // in several relations.
+ rel.accept(new CorrelationUsedOnlyInSingleRelValidator());
+ } catch (FoundOne ignored) {
+ return rel;
+ }
+
+ RelBuilder relBuilder =
Commons.FRAMEWORK_CONFIG.getSqlToRelConverterConfig()
+ .getRelBuilderFactory()
+ .create(planner.cluster(), null);
+
+ RelNode result = RelDecorrelator.decorrelateQuery(rel, relBuilder);
+ result = planner.transform(
+ PlannerPhase.HEP_PROJECT_TO_WINDOW, rel.getTraitSet(), result
+ );
+
+ try {
+ // Decorrelation may produce Window node which is currently not
supported.
Review Comment:
Seems having an additional ticket for that will be good
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