[GitHub] [calcite] danny0405 commented on a change in pull request #1811: [CALCITE-3789] Support validation of UNNEST multiple array columns like Presto

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danny0405 commented on a change in pull request #1811: [CALCITE-3789] Support validation of UNNEST multiple array columns like Presto
URL: https://github.com/apache/calcite/pull/1811#discussion_r403423360
 
 

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 File path: core/src/test/java/org/apache/calcite/test/SqlToRelConverterTest.java
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 @@ -1304,7 +1304,31 @@ public final Sql sql(String sql) {
     final String sql = "select d.deptno, e2.empno\n"
         + "from dept_nested as d,\n"
         + " UNNEST(d.employees) as e2(empno, y, z)";
-    sql(sql).with(getExtendedTester()).ok();
+    sql(sql).ok();
+  }
+
+  /**
+   * Test case for
+   * <a href="https://issues.apache.org/jira/browse/CALCITE-3789">[CALCITE-3789]
+   * Support validation of UNNEST multiple array columns like Presto</a>.
+   */
+  @Test public void testAliasUnnestArrayPlanWithSingleColumn() {
+    final String sql = "select d.deptno, employee.empno\n"
+        + "from dept_nested_expanded as d,\n"
+        + " UNNEST(d.employees) as t(employee)";
+    sql(sql).conformance(SqlConformanceEnum.PRESTO).decorrelate(false).ok();
 
 Review comment:
   It is, you should fix the `RelStructuredTypeFlattener`.

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