gianm commented on code in PR #19711:
URL: https://github.com/apache/druid/pull/19711#discussion_r3636271814
##########
embedded-tests/src/test/java/org/apache/druid/testing/embedded/catalog/CatalogIngestAndQueryTest.java:
##########
@@ -415,6 +423,123 @@ public void testInsertWithMultiClusteringFromQuery()
);
}
+ /**
+ * Create a table with columns (in declared order, which is the physical
segment order — the clustering column
+ * must be declared first):
+ * <p>
+ * varchar_col2 VARCHAR
+ * __time LONG
+ * varchar_col1 VARCHAR
+ * bigint_col1 BIGINT
+ * <p>
+ * and a clustered base table layout with clustering column {@code
varchar_col2}, plus an aggregate projection
+ * ({@code varchar_col2_daily}: group by varchar_col2, sum bigint_col1), so
ingestion produces clustered (V10)
+ * segments that also carry a segment-wide projection.
+ * <p>
+ * Insert the following data:
+ * <p>
+ * __time, varchar_col1, bigint_col1, float_col1, varchar_col2
+ * 2022-12-26T12:34:56,extra,10,"20",2.0,foo
+ * 2022-12-26T12:34:56,extra,9,"30",2.0,foo
+ * 2022-12-26T12:34:56,extra,8,"40",2.0,foq
+ * 2022-12-26T12:34:56,extra,8,"50",2.0,fop
+ * <p>
+ * 'SELECT * from ##tableName' returns columns in catalog order and rows in
segment order: cluster groups in
Review Comment:
What's with the `##`?
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