924060929 commented on code in PR #31227:
URL: https://github.com/apache/doris/pull/31227#discussion_r1498779247
##########
fe/fe-core/src/test/java/org/apache/doris/nereids/jobs/joinorder/TPCHTest.java:
##########
@@ -33,4 +38,34 @@ void testQ5() {
.dpHypOptimize()
.printlnBestPlanTree();
}
+
+
+ // count(*) projects on children key columns
+ @Test
+ void testCountStarProject() {
+ String sql = "select\n"
+ + " count(*) as order_count\n"
+ + "from\n"
+ + " orders\n"
+ + "where\n"
+ + " o_orderdate >= date '1993-07-01'\n"
+ + " and o_orderdate < date '1993-07-01' + interval '3'
month\n"
+ + " and exists (\n"
+ + " select\n"
+ + " *\n"
+ + " from\n"
+ + " lineitem\n"
+ + " where\n"
+ + " l_orderkey = o_orderkey\n"
+ + " and l_commitdate < l_receiptdate\n"
+ + " );";
+
+ PlanChecker checker = PlanChecker.from(connectContext)
+ .analyze(sql)
+ .rewrite();
+ List<? extends Expression> proj =
checker.getPlan().child(0).child(0).getExpressions();
+ Assertions.assertEquals(proj.size(), 1);
+ Assertions.assertTrue(proj.get(0) instanceof SlotReference
+ && "o_orderdate".equals(proj.get(0).toSql()));
Review Comment:
please check the shape of top plan, is it
`logicalResultSink(logicalAggregate(logicalProject()))`?
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