mongo bug

Author: Dmitry Sysolyatin

mongodb/src/test/java/org/apache/calcite/adapter/mongodb/MongoAdapterTest.java

@@ -819,6 +819,12 @@ private static Consumer<List> mongoChecker(final String... expected) {
     };
   }
 
+  @Test void testCalciteFunc() {
+    assertModel(MODEL)
+        .query("select CHAR_LENGTH(state) from zips")
+        .runs();
+  }
+
   @Test void testColumnQuoting() {
     assertModel(MODEL)
         .query("select state as \"STATE\", avg(pop) as \"AVG(pop)\" "