xuzifu666 commented on code in PR #4933:
URL: https://github.com/apache/calcite/pull/4933#discussion_r3440089844
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core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java:
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@@ -1021,6 +1042,77 @@ private void distinctify(
rel.getRowType().getFieldNames(), ImmutableSet.of()), false);
}
+ /**
+ * Converts a SELECT DISTINCT ON clause into a relational expression
+ * using ROW_NUMBER() window function.
+ */
+ private void convertDistinctOn(Blackboard bb, SqlSelect select,
+ List<RelFieldCollation> collationList) {
Review Comment:
Thanks for the reminder, I had add a QuidemTest for it, completely
consistent with the PostgreSQL results.
https://onecompiler.com/postgresql/44sqjg9t6
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