Coverage Summary for Class: TestReducing (org.umlg.sqlg.test.reducing)

Class Method, % Branch, % Line, %
TestReducing 100% (65/65) 49.3% (66/134) 98.7% (1038/1052)
TestReducing$1 100% (1/1) 100% (4/4)
TestReducing$10 100% (1/1) 100% (3/3)
TestReducing$2 100% (1/1) 100% (3/3)
TestReducing$3 100% (1/1) 100% (3/3)
TestReducing$4 100% (1/1) 100% (3/3)
TestReducing$5 100% (1/1) 100% (3/3)
TestReducing$6 100% (1/1) 100% (3/3)
TestReducing$7 100% (1/1) 100% (3/3)
TestReducing$8 100% (1/1) 100% (3/3)
TestReducing$9 100% (1/1) 100% (3/3)
Total 100% (75/75) 49.3% (66/134) 98.7% (1069/1083)


 package org.umlg.sqlg.test.reducing;
 
 import org.apache.commons.collections4.set.ListOrderedSet;
 import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.GroupStep;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.SubgraphStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal;
 import org.apache.tinkerpop.gremlin.structure.Edge;
 import org.apache.tinkerpop.gremlin.structure.T;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 import org.umlg.sqlg.step.SqlgGraphStep;
 import org.umlg.sqlg.step.SqlgGroupStep;
 import org.umlg.sqlg.step.SqlgPropertiesStep;
 import org.umlg.sqlg.step.barrier.*;
 import org.umlg.sqlg.structure.PropertyDefinition;
 import org.umlg.sqlg.structure.PropertyType;
 import org.umlg.sqlg.test.BaseTest;
 
 import java.sql.Connection;
 import java.sql.Statement;
 import java.util.*;
 
 /**
  * @author <a href="https://github.com/pietermartin">Pieter Martin</a>
  * Date: 2018/11/17
  */
 @SuppressWarnings({"Duplicates", "unchecked", "rawtypes", "resource"})
 public class TestReducing extends BaseTest {
 
     @Before
     public void before() throws Exception {
         super.before();
         if (isHsqldb()) {
             Connection connection = this.sqlgGraph.tx().getConnection();
             Statement statement = connection.createStatement();
             statement.execute("SET DATABASE SQL AVG SCALE 2");
             this.sqlgGraph.tx().commit();
         }
     }
 
     @Test
     public void testRepeatAndMin() {
         loadModern();
         final Traversal<Vertex, Integer> traversal = this.sqlgGraph.traversal().V().repeat(__.both()).times(5).values("age").min();
         printTraversalForm(traversal);
         checkResults(List.of(27), traversal);
     }
 
     @Test
     public void g_V_repeatXbothXfollowedByXX_timesX2X_group_byXsongTypeX_byXcountX() {
         loadGratefulDead();
         final Traversal<Vertex, Map<String, Long>> traversal = this.sqlgGraph.traversal().V().repeat(__.both("followedBy")).times(2).<String, Long>group().by("songType").by(__.count());
         printTraversalForm(traversal);
         Map<String, Long> result = traversal.next();
         AbstractGremlinProcessTest.checkMap(new HashMap<>() {{
             put("original", 771317L);
             put("", 160968L);
             put("cover", 368579L);
         }}, result);
         Assert.assertFalse(traversal.hasNext());
         AbstractGremlinProcessTest.checkSideEffects(traversal.asAdmin().getSideEffects());
     }
 
     @Test
     public void testGroupCountNoBySomething() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Long, Long>> traversal = (DefaultTraversal<Vertex, Map<Long, Long>>) this.sqlgGraph.traversal().V().<Long>groupCount().by(__.bothE().count());
         printTraversalForm(traversal);
         List<Map<Long, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertEquals(1, result.get(0).size());
         Assert.assertTrue(result.get(0).values().stream().allMatch(a -> a == 6L));
     }
 
     @Test
     public void testGroupCountNoBy() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Object, Long>> traversal = (DefaultTraversal<Vertex, Map<Object, Long>>) sqlgGraph.traversal().V()
                 .groupCount();
         printTraversalForm(traversal);
         List<Map<Object, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertEquals(6, result.get(0).size());
         Assert.assertTrue(result.get(0).values().stream().allMatch(a -> a == 1L));
     }
 
     @Test
     public void testGroupCount() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Object, Long>> traversal = (DefaultTraversal<Vertex, Map<Object, Long>>) this.sqlgGraph.traversal().V().hasLabel("A").groupCount().by("name");
         printTraversalForm(traversal);
         List<Map<Object, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertEquals(2, result.get(0).get("a"), 0);
         Assert.assertEquals(1, result.get(0).get("b"), 0);
     }
 
     @Test
     public void testGroupCountByLabel() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Object, Long>> traversal = (DefaultTraversal<Vertex, Map<Object, Long>>) this.sqlgGraph.traversal().V().groupCount().by(T.label);
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String sql1 = """
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_A"\
                     """;
             String sql2 = """
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_B"\
                     """;
             String sql3 = """
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_C"\
                     """;
             if (!sql1.equals(sql) && !sql2.equals(sql) && !sql3.equals(sql)) {
                 Assert.fail(sql + " not found");
             }
         }
         List<Map<Object, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertEquals(3, result.get(0).size());
         Assert.assertTrue(result.get(0).containsKey("A"));
         Assert.assertTrue(result.get(0).containsKey("B"));
         Assert.assertTrue(result.get(0).containsKey("C"));
         Assert.assertEquals(3L, result.get(0).get("A"), 0);
         Assert.assertEquals(2L, result.get(0).get("B"), 0);
         Assert.assertEquals(1L, result.get(0).get("C"), 0);
     }
 
     @Test
     public void testGroupByCountLabel() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Object, Long>> traversal = (DefaultTraversal<Vertex, Map<Object, Long>>) this.sqlgGraph.traversal().V()
                 .<Object, Long>group().by(T.label).by(__.count());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String sql1 = """
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_A\"""";
             String sql2 = """
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_B\"""";
             String sql3 = """
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_C\"""";
             if (!sql1.equals(sql) && !sql2.equals(sql) && !sql3.equals(sql)) {
                 Assert.fail(sql + " not found");
             }
         }
         List<Map<Object, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertEquals(3, result.get(0).size());
         Assert.assertTrue(result.get(0).containsKey("A"));
         Assert.assertTrue(result.get(0).containsKey("B"));
         Assert.assertTrue(result.get(0).containsKey("C"));
         Assert.assertEquals(3L, result.get(0).get("A"), 0);
         Assert.assertEquals(2L, result.get(0).get("B"), 0);
         Assert.assertEquals(1L, result.get(0).get("C"), 0);
     }
 
     @Test
     public void testGroupByCount() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 2);
         this.sqlgGraph.addVertex(T.label, "A", "name", "b", "age", 3);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Map<Object, Long>> traversal = (DefaultTraversal<Vertex, Map<Object, Long>>) this.sqlgGraph.traversal().V().hasLabel("A")
                 .<Object, Long>group().by("name").by(__.count());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count",
                     \t"public"."V_A"."name" AS "alias1"
                     FROM
                     \t"public"."V_A"
                     GROUP BY
                     \t"public"."V_A"."name\"""", sql);
         }
         List<Map<Object, Long>> result = traversal.toList();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.get(0).containsKey("a"));
         Assert.assertTrue(result.get(0).containsKey("b"));
         Assert.assertEquals(2L, result.get(0).get("a"), 0);
         Assert.assertEquals(1L, result.get(0).get("b"), 0);
     }
 
     @Test
     public void testMax() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", 1, "x", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 2, "x", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 3, "x", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 0, "x", 1);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tMAX("public"."V_Person"."age") AS "alias1"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertEquals(3, traversal.next(), 0);
     }
 
     @Test
     public void testGroupOverOnePropertyMax() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) sqlgGraph.traversal()
                 .V().hasLabel("Person")
                 .<String, Integer>group().by("name").by(__.values("age").max());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."name" AS "alias1",
                     \tMAX("public"."V_Person"."age") AS "alias2"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Integer> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertTrue(result.containsKey("A"));
         Assert.assertTrue(result.containsKey("B"));
         Assert.assertEquals(3, result.get("A"), 0);
         Assert.assertEquals(4, result.get("B"), 0);
     }
 
     @Test
     public void testMaxOnString() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", "a");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "b");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "d");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "c");
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, String> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tMAX("public"."V_Person"."age") AS "alias1"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertEquals("d", traversal.next());
     }
 
     @SuppressWarnings("Duplicates")
     @Test
     public void testMin() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 0);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").min();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tMIN("public"."V_Person"."age") AS "alias1"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMinGlobalStep);
         Assert.assertEquals(0, traversal.next(), 0);
     }
 
     @Test
     public void testMinOnString() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", "a");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "b");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "c");
         this.sqlgGraph.addVertex(T.label, "Person", "age", "d");
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, String> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").min();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tMIN("public"."V_Person"."age") AS "alias1"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMinGlobalStep);
         Assert.assertEquals("a", traversal.next());
     }
 
     @Test
     public void testSum() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").sum();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tSUM("public"."V_Person"."age") AS "alias1"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgSumGlobalStep);
         Assert.assertEquals(6, traversal.next(), 0L);
     }
 
     @Test
     public void testMean() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 0);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Double> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person").values("age").mean();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tAVG("public"."V_Person"."age") AS "alias1", COUNT(1) AS "alias1_weight"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgAvgGlobalStep);
         Double d = traversal.next();
         Assert.assertEquals(1.5, d, 0D);
     }
 
     @Test
     public void g_V_age_mean() {
         loadModern();
         Traversal<Vertex, Double> t1 = sqlgGraph.traversal().V().values("age").mean();
         Traversal<Vertex, Double> t2 = sqlgGraph.traversal().V().values("age").fold().mean(Scope.local);
         for (final Traversal<Vertex, Double> traversal : Arrays.asList(t1, t2)) {
             printTraversalForm(traversal);
             final Double mean = traversal.next();
             Assert.assertEquals(30.75, mean, 0.05);
             Assert.assertFalse(traversal.hasNext());
         }
     }
 
     @Test
     public void g_V_foo_mean() {
         loadModern();
 
         Traversal<Vertex, Number> t1 = sqlgGraph.traversal().V().values("foo").mean();
         Traversal<Vertex, Number> t2 = sqlgGraph.traversal().V().values("foo").fold().mean(Scope.local);
         for (final Traversal<Vertex, Number> traversal : Arrays.asList(t1, t2)) {
             printTraversalForm(traversal);
             Assert.assertFalse(traversal.hasNext());
         }
     }
 
     @Test
     public void g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_meanX() {
         loadModern();
         final Traversal<Vertex, Map<String, Number>> traversal = this.sqlgGraph.traversal().V().hasLabel("software")
                 .<String, Number>group().by("name").by(__.bothE().values("weight").mean());
         printTraversalForm(traversal);
         Assert.assertTrue(traversal.hasNext());
         final Map<String, Number> map = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(2, map.size());
         Assert.assertEquals(1.0, map.get("ripple"));
         Assert.assertEquals(1.0 / 3, map.get("lop"));
     }
 
     @Test
     public void testGroupOverOnePropertyMin() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) sqlgGraph.traversal()
                 .V().hasLabel("Person")
                 .<String, Integer>group().by("name").by(__.values("age").min());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."name" AS "alias1",
                     \tMIN("public"."V_Person"."age") AS "alias2"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Integer> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertTrue(result.containsKey("A"));
         Assert.assertTrue(result.containsKey("B"));
         Assert.assertEquals(1, result.get("A"), 0);
         Assert.assertEquals(2, result.get("B"), 0);
     }
 
     @Test
     public void testGroupOverOnePropertySum() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Long>> traversal = (DefaultTraversal) sqlgGraph.traversal()
                 .V().hasLabel("Person")
                 .<String, Long>group().by("name").by(__.values("age").sum());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."name" AS "alias1",
                     \tSUM("public"."V_Person"."age") AS "alias2"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Long> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertTrue(result.containsKey("A"));
         Assert.assertTrue(result.containsKey("B"));
         Assert.assertEquals(4, result.get("A"), 0L);
         Assert.assertEquals(6, result.get("B"), 0L);
     }
 
     @Test
     public void testGroupOverOnePropertyMean() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Double>> traversal = (DefaultTraversal) sqlgGraph.traversal()
                 .V().hasLabel("Person")
                 .<String, Double>group().by("name").by(__.values("age").mean());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."name" AS "alias1",
                     \tAVG("public"."V_Person"."age") AS "alias2", COUNT(1) AS "alias2_weight"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Double> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertTrue(result.containsKey("A"));
         Assert.assertTrue(result.containsKey("B"));
         Assert.assertEquals(2.0, result.get("A"), 0D);
         Assert.assertEquals(3.0, result.get("B"), 0D);
     }
 
     @Test
     public void testGroupOverTwoPropertiesWithValues() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "surname", "C", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "surname", "D", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "surname", "C", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "surname", "E", "age", 4);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "C", "surname", "E", "age", 5);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<List<String>, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person")
                 .<List<String>, Integer>group()
                 .by(__.values("name", "surname").fold())
                 .by(__.values("age").max());
 
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."surname" AS "alias1",
                     \t"public"."V_Person"."name" AS "alias2",
                     \tMAX("public"."V_Person"."age") AS "alias3"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name",
                     \t"public"."V_Person"."surname\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
 
         Map<List<String>, Integer> result = traversal.next();
         System.out.println(result);
 
         Assert.assertTrue(result.containsKey(Arrays.asList("A", "C")) || result.containsKey(Arrays.asList("C", "A")));
         Assert.assertTrue(result.containsKey(Arrays.asList("B", "D")) || result.containsKey(Arrays.asList("D", "B")));
         Assert.assertTrue(result.containsKey(Arrays.asList("B", "E")) || result.containsKey(Arrays.asList("E", "B")));
         Assert.assertTrue(result.containsKey(Arrays.asList("C", "E")) || result.containsKey(Arrays.asList("E", "C")));
         Assert.assertEquals(4, result.size());
         Assert.assertFalse(traversal.hasNext());
 
         if (result.containsKey(Arrays.asList("A", "C"))) {
             Assert.assertEquals(3, result.get(Arrays.asList("A", "C")), 0);
         } else {
             Assert.assertEquals(3, result.get(Arrays.asList("C", "A")), 0);
         }
         if (result.containsKey(Arrays.asList("B", "D"))) {
             Assert.assertEquals(2, result.get(Arrays.asList("B", "D")), 0);
         } else {
             Assert.assertEquals(2, result.get(Arrays.asList("D", "B")), 0);
         }
         if (result.containsKey(Arrays.asList("B", "E"))) {
             Assert.assertEquals(4, result.get(Arrays.asList("B", "E")), 0);
         } else {
             Assert.assertEquals(4, result.get(Arrays.asList("E", "B")), 0);
         }
         if (result.containsKey(Arrays.asList("C", "E"))) {
             Assert.assertEquals(5, result.get(Arrays.asList("C", "E")), 0);
         } else {
             Assert.assertEquals(5, result.get(Arrays.asList("E", "C")), 0);
         }
     }
 
     @SuppressWarnings("ArraysAsListWithZeroOrOneArgument")
     @Test
     public void testGroupOverTwoPropertiesWithValueMap() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "surname", "C", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "surname", "D", "age", 2);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "surname", "C", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "surname", "E", "age", 4);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "C", "surname", "E", "age", 5);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<Map<String, List<String>>, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("Person")
                 .<Map<String, List<String>>, Integer>group()
                 .by(__.valueMap("name", "surname"))
                 .by(__.values("age").max());
 
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_Person"."surname" AS "alias1",
                     \t"public"."V_Person"."name" AS "alias2",
                     \tMAX("public"."V_Person"."age") AS "alias3"
                     FROM
                     \t"public"."V_Person"
                     GROUP BY
                     \t"public"."V_Person"."name",
                     \t"public"."V_Person"."surname\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
 
         Map<Map<String, List<String>>, Integer> result = traversal.next();
         System.out.println(result);
 
         Assert.assertTrue(result.containsKey(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("C"));
             put("name", Arrays.asList("A"));
         }}));
         Assert.assertTrue(result.containsKey(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("D"));
             put("name", Arrays.asList("B"));
         }}));
         Assert.assertTrue(result.containsKey(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("E"));
             put("name", Arrays.asList("B"));
         }}));
         Assert.assertTrue(result.containsKey(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("E"));
             put("name", Arrays.asList("C"));
         }}));
 
         Assert.assertEquals(3, result.get(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("C"));
             put("name", Arrays.asList("A"));
         }}), 0);
         Assert.assertEquals(2, result.get(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("D"));
             put("name", Arrays.asList("B"));
         }}), 0);
         Assert.assertEquals(4, result.get(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("E"));
             put("name", Arrays.asList("B"));
         }}), 0);
         Assert.assertEquals(5, result.get(new HashMap<String, List<String>>() {{
             put("surname", Arrays.asList("E"));
             put("name", Arrays.asList("C"));
         }}), 0);
     }
 
     @Test
     public void testGroupOverOnePropertyWithJoin() {
         Vertex person = this.sqlgGraph.addVertex(T.label, "Person", "name", "A");
         Vertex address1 = this.sqlgGraph.addVertex(T.label, "Address", "name", "A", "year", 2);
         Vertex address2 = this.sqlgGraph.addVertex(T.label, "Address", "name", "A", "year", 4);
         Vertex address3 = this.sqlgGraph.addVertex(T.label, "Address", "name", "C", "year", 6);
         Vertex address4 = this.sqlgGraph.addVertex(T.label, "Address", "name", "D", "year", 8);
         Vertex address5 = this.sqlgGraph.addVertex(T.label, "Address", "name", "D", "year", 7);
         Vertex address6 = this.sqlgGraph.addVertex(T.label, "Address", "name", "D", "year", 6);
         person.addEdge("livesAt", address1);
         person.addEdge("livesAt", address2);
         person.addEdge("livesAt", address3);
         person.addEdge("livesAt", address4);
         person.addEdge("livesAt", address5);
         person.addEdge("livesAt", address6);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal()
                 .V().hasLabel("Person")
                 .out("livesAt")
                 .<String, Integer>group()
                 .by("name")
                 .by(__.values("year").max());
 
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tMAX("public"."V_Address"."year") AS "alias1",
                     \t"public"."V_Address"."name" AS "alias2"
                     FROM
                     \t"public"."V_Person" INNER JOIN
                     \t"public"."E_livesAt" ON "public"."V_Person"."ID" = "public"."E_livesAt"."public.Person__O" INNER JOIN
                     \t"public"."V_Address" ON "public"."E_livesAt"."public.Address__I" = "public"."V_Address"."ID"
                     GROUP BY
                     \t"public"."V_Address"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
 
         Map<String, Integer> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(3, result.size());
         Assert.assertTrue(result.containsKey("A"));
         Assert.assertTrue(result.containsKey("C"));
         Assert.assertTrue(result.containsKey("D"));
         Assert.assertEquals(4, result.get("A"), 0);
         Assert.assertEquals(6, result.get("C"), 0);
         Assert.assertEquals(8, result.get("D"), 0);
     }
 
     @Test
     public void testGroupByLabelMax() {
         this.sqlgGraph.addVertex(T.label, "Person", "name", "A", "age", 10);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "B", "age", 20);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "C", "age", 100);
         this.sqlgGraph.addVertex(T.label, "Person", "name", "D", "age", 40);
 
         this.sqlgGraph.addVertex(T.label, "Dog", "name", "A", "age", 10);
         this.sqlgGraph.addVertex(T.label, "Dog", "name", "B", "age", 200);
         this.sqlgGraph.addVertex(T.label, "Dog", "name", "C", "age", 30);
         this.sqlgGraph.addVertex(T.label, "Dog", "name", "D", "age", 40);
 
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().<String, Integer>group().by(T.label).by(__.values("age").max());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String sql1 = """
                     SELECT
                     \tMAX("public"."V_Dog"."age") AS "alias1"
                     FROM
                     \t"public"."V_Dog"\
                     """;
             String sql2 = """
                     SELECT
                     	MAX("public"."V_Person"."age") AS "alias1"
                     FROM
                     	"public"."V_Person"\
                     """;
             if (!sql1.equals(sql) && !sql2.equals(sql)) {
                 Assert.fail(sql + " not found");
             }
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
 
         Map<String, Integer> result = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(2, result.size());
         Assert.assertTrue(result.containsKey("Person"));
         Assert.assertTrue(result.containsKey("Dog"));
         Assert.assertEquals(100, result.get("Person"), 0);
         Assert.assertEquals(200, result.get("Dog"), 0);
     }
 
     @Test
     public void testDuplicatePathQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 5);
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 7);
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a4", "age", 5);
         a1.addEdge("aa", a2);
         a1.addEdge("aa", a3);
         a1.addEdge("aa", a4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("aa").values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	MAX(a2."alias2")\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."V_A"."age" AS "alias2"
                     FROM
                     	"public"."V_A"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1"\
                     """, sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Integer max = traversal.next();
         Assert.assertEquals(7, max, 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathQuery2() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 5);
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 7);
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a4", "age", 5);
         a1.addEdge("aa", a2);
         a1.addEdge("aa", a3);
         a1.addEdge("aa", a4);
         a2.addEdge("aa", a1);
         a2.addEdge("aa", a3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("aa").out("aa").values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	MAX(a3."alias3")\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1" INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias2",
                     	"public"."V_A"."age" AS "alias3"
                     FROM
                     	"public"."V_A"
                     ) a3 ON a2."public.E_aa.public.A__I" = a3."alias2"\
                     """, sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Integer max = traversal.next();
         Assert.assertEquals(7, max, 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathQuery3() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b1", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b2", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b3", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "c1", "age", 1);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "c2", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "c3", "age", 3);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").values("age").sum();
         @SuppressWarnings("unused")
         String sql = getSQL(traversal);
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgSumGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Long max = traversal.next();
         Assert.assertEquals(12, max, 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupCountQuery2() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 0);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 4);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Long>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.values("age").count());
         @SuppressWarnings("unused")
         String sql = getSQL(traversal);
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof GroupStep);
         Map<String, Long> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Long l = result.get("b");
         Assert.assertEquals(7L, l, 0L);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupCountQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 1);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Long>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.count());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count",
                     \t"public"."V_B"."name" AS "alias1"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"
                     WHERE
                     \t( "public"."V_A"."ID" = ?)
                     GROUP BY
                     \t"public"."V_B"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Long> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Assert.assertEquals(7, result.get("b"), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupSumQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 1);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 3);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Long>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.values("age").sum());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_B"."name" AS "alias1",
                     \tSUM("public"."V_B"."age") AS "alias2"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"
                     WHERE
                     \t( "public"."V_A"."ID" = ?)
                     GROUP BY
                     \t"public"."V_B"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Long> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Assert.assertEquals(15, result.get("b"), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupMaxQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 1);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 4);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.values("age").max());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_B"."name" AS "alias1",
                     \tMAX("public"."V_B"."age") AS "alias2"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"
                     WHERE
                     \t( "public"."V_A"."ID" = ?)
                     GROUP BY
                     \t"public"."V_B"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Integer> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Assert.assertEquals(4, result.get("b"), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupMinQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 0);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 4);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.values("age").min());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_B"."name" AS "alias1",
                     \tMIN("public"."V_B"."age") AS "alias2"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"
                     WHERE
                     \t( "public"."V_A"."ID" = ?)
                     GROUP BY
                     \t"public"."V_B"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Integer> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Assert.assertEquals(0, result.get("b"), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathQueryMean() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 2);
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 3);
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a4", "age", 4);
         a1.addEdge("aa", a2, "uid", UUID.randomUUID().toString());
         a1.addEdge("aa", a3, "uid", UUID.randomUUID().toString());
         a1.addEdge("aa", a4, "uid", UUID.randomUUID().toString());
         a2.addEdge("aa", a1, "uid", UUID.randomUUID().toString());
         a2.addEdge("aa", a3, "uid", UUID.randomUUID().toString());
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Double> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("aa").out("aa").values("age").mean();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	AVG(a3."alias3"), COUNT(1) AS "alias3_weight"\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1" INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias2",
                     	"public"."V_A"."age" AS "alias3"
                     FROM
                     	"public"."V_A"
                     ) a3 ON a2."public.E_aa.public.A__I" = a3."alias2"\
                     """, sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgAvgGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Double mean = traversal.next();
         Assert.assertEquals(2, mean, 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicatePathGroupMeanQuery() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 1);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 3);
         Vertex c1 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 0);
         Vertex c2 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 2);
         Vertex c3 = this.sqlgGraph.addVertex(T.label, "C", "name", "b", "age", 4);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         a1.addEdge("ac", c1);
         a1.addEdge("ac", c2);
         a1.addEdge("ac", c3);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Double>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out("ab", "ac").group().by("name").by(__.values("age").mean());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \t"public"."V_B"."name" AS "alias1",
                     \tAVG("public"."V_B"."age") AS "alias2", COUNT(1) AS "alias2_weight"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"
                     WHERE
                     \t( "public"."V_A"."ID" = ?)
                     GROUP BY
                     \t"public"."V_B"."name\"""", sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Map<String, Double> result = traversal.next();
         Assert.assertEquals(1, result.size());
         Assert.assertTrue(result.containsKey("b"));
         Double d = result.get("b");
         Assert.assertEquals(2.142857142857143D, d, 0D);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testGroupByDuplicatePaths() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 2);
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 3);
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 4);
         Vertex a5 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 5);
         Vertex a6 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 6);
         a1.addEdge("aa", a2);
         a1.addEdge("aa", a3);
         a1.addEdge("aa", a4);
         a1.addEdge("aa", a5);
         a1.addEdge("aa", a6);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Map<String, Integer>> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V(a1).out().<String, Integer>group().by("name").by(__.values("age").max());
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	a2."alias2", MAX(a2."alias3")\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."V_A"."name" AS "alias2",
                     	"public"."V_A"."age" AS "alias3"
                     FROM
                     	"public"."V_A"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1"
                     GROUP BY
                     	a2."alias2"\
                     """, sql);
         }
         Assert.assertEquals(2, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgGroupStep);
         Assert.assertTrue(traversal.hasNext());
         Map<String, Integer> result = traversal.next();
         Assert.assertEquals(2, result.size());
         Assert.assertTrue(result.containsKey("a2"));
         Assert.assertEquals(3, result.get("a2"), 0);
         Assert.assertTrue(result.containsKey("a3"));
         Assert.assertEquals(6, result.get("a3"), 0);
     }
 
     @Test
     public void duplicateQueryMax() {
         this.sqlgGraph.addVertex(T.label, "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertTrue(
                     ("""
                             SELECT
                             	MAX("public"."V_B"."age") AS "alias1"
                             FROM
                             	"public"."V_B"\
                             """.equals(sql)) ||
                             ("""
                                     SELECT
                                     	MAX("public"."V_A"."age") AS "alias1"
                                     FROM
                                     	"public"."V_A"\
                                     """.equals(sql))
             );
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
 
         Assert.assertEquals(2, traversal.next(), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void duplicateQueryMin() {
         this.sqlgGraph.addVertex(T.label, "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().values("age").min();
         String sql = getSQL(traversal);
         String s1 = """
                 SELECT
                 \tMIN("public"."V_B"."age") AS "alias1"
                 FROM
                 \t"public"."V_B"\
                 """;
         String s2 = """
                 SELECT
                 \tMIN("public"."V_A"."age") AS "alias1"
                 FROM
                 \t"public"."V_A"\
                 """;
         if (isPostgres()) {
             Assert.assertTrue(s1.equals(sql) || s2.equals(sql));
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMinGlobalStep);
 
         Assert.assertEquals(1, traversal.next(), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void duplicateQuerySum() {
         this.sqlgGraph.addVertex(T.label, "A", "age", 1);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().values("age").sum();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String sql1 = """
                     SELECT
                     \tSUM("public"."V_B"."age") AS "alias1"
                     FROM
                     \t"public"."V_B\"""";
             String sql2 = """
                     SELECT
                     \tSUM("public"."V_A"."age") AS "alias1"
                     FROM
                     \t"public"."V_A\"""";
             if (!sql1.equals(sql) && !sql2.equals(sql)) {
                 Assert.fail(sql + " not found");
             }
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgSumGlobalStep);
 
         Assert.assertEquals(3, traversal.next(), 0L);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void duplicateQueryMean() {
         this.sqlgGraph.addVertex(T.label, "A", "age", 1);
 
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.addVertex(T.label, "B", "age", 2);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Double> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().values("age").mean();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String s1 = """
                     SELECT
                     \tAVG("public"."V_B"."age") AS "alias1", COUNT(1) AS "alias1_weight"
                     FROM
                     \t"public"."V_B"\
                     """;
             String s2 = """
                     SELECT
                     \tAVG("public"."V_A"."age") AS "alias1", COUNT(1) AS "alias1_weight"
                     FROM
                     \t"public"."V_A"\
                     """;
             if (!(s1.equals(sql) || s2.equals(sql.trim()))) {
                 Assert.fail(sql);
             }
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgAvgGlobalStep);
 
         Assert.assertEquals(1.8, traversal.next(), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testDuplicateQueryNoLabel() {
         Vertex p1 = this.sqlgGraph.addVertex(T.label, "person", "age", 1);
         Vertex p2 = this.sqlgGraph.addVertex(T.label, "person", "age", 2);
         p1.addEdge("knows", p2);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Double> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("person").out().out().values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	MAX(a3."alias3")\s
                     FROM (SELECT
                     	"public"."E_knows"."public.person__I" AS "public.E_knows.public.person__I"
                     FROM
                     	"public"."V_person" INNER JOIN
                     	"public"."E_knows" ON "public"."V_person"."ID" = "public"."E_knows"."public.person__O"
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_person"."ID" AS "alias1",
                     	"public"."E_knows"."public.person__I" AS "public.E_knows.public.person__I"
                     FROM
                     	"public"."V_person" INNER JOIN
                     	"public"."E_knows" ON "public"."V_person"."ID" = "public"."E_knows"."public.person__O"
                     ) a2 ON a1."public.E_knows.public.person__I" = a2."alias1" INNER JOIN (SELECT
                     	"public"."V_person"."ID" AS "alias2",
                     	"public"."V_person"."age" AS "alias3"
                     FROM
                     	"public"."V_person"
                     ) a3 ON a2."public.E_knows.public.person__I" = a3."alias2"\
                     """, sql);
         }
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Number m = traversal.next();
         //noinspection ConstantConditions
         Assert.assertTrue(m instanceof Double);
         //noinspection CastCanBeRemovedNarrowingVariableType
         Assert.assertEquals(Double.NaN, (Double) m, 0D);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @SuppressWarnings("ConstantConditions")
     @Test
     public void g_V_out_out_max() {
         loadModern();
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("person").out().out().values("age").max();
         printTraversalForm(traversal);
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Number m = traversal.next();
         Assert.assertTrue(m instanceof Double);
         Assert.assertEquals(Double.NaN, (Double) m, 0D);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @SuppressWarnings("ConstantConditions")
     @Test
     public void g_V_repeatXoutX_timesX2X_age_max() {
         loadModern();
         DefaultTraversal<Vertex, Integer> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V().hasLabel("person").repeat(__.out()).times(2).values("age").max();
         printTraversalForm(traversal);
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgMaxGlobalStep);
         Assert.assertTrue(traversal.hasNext());
         Number m = traversal.next();
         Assert.assertTrue(m instanceof Double);
         Assert.assertEquals(Double.NaN, (Double) m, 0D);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void g_V_repeatXbothX_timesX5X_age_max() {
         loadModern();
         Traversal<Vertex, Integer> traversal = this.sqlgGraph.traversal().V().repeat(__.both()).times(5).values("age").max();
         printTraversalForm(traversal);
         checkResults(Collections.singletonList(35), traversal);
     }
 
     @Test
     public void g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_maxX() {
         loadModern();
         final Traversal<Vertex, Map<String, Number>> traversal = this.sqlgGraph.traversal()
                 .V().hasLabel("software")
                 .<String, Number>group().by("name").by(
                         __.bothE().values("weight").max()
                 );
         printTraversalForm(traversal);
         Assert.assertTrue(traversal.hasNext());
         final Map<String, Number> map = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(2, map.size());
         Assert.assertEquals(1.0, map.get("ripple"));
         Assert.assertEquals(0.4, map.get("lop"));
     }
 
     @Test
     public void testMaxAgain() {
         this.sqlgGraph.addVertex(T.label, "Person", "age", 1);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 3);
         this.sqlgGraph.addVertex(T.label, "Person", "age", 5);
         this.sqlgGraph.addVertex(T.label, "Dog", "age", 7);
         this.sqlgGraph.tx().commit();
         Traversal<Vertex, Integer> traversal = this.sqlgGraph.traversal().V().values("age").max();
         printTraversalForm(traversal);
         Integer max = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(7, max, 0);
     }
 
     @Test
     public void testMax2() {
         loadModern();
         Traversal<Vertex, Integer> traversal = this.sqlgGraph.traversal().V().values("age").max();
         printTraversalForm(traversal);
         checkResults(Collections.singletonList(35), traversal);
     }
 
     @Test
     public void g_V_outXfollowedByX_group_byXsongTypeX_byXbothE_group_byXlabelX_byXweight_sumXX() {
         loadGratefulDead();
         final Traversal<Vertex, Map<String, Map<String, Number>>> traversal = this.sqlgGraph.traversal()
                 .V().out("followedBy")
                 .<String, Map<String, Number>>group()
                 .by("songType")
                 .by(
                         __.bothE()
                                 .group()
                                 .by(T.label)
                                 .by(__.values("weight").sum())
                 );
         printTraversalForm(traversal);
         final Map<String, Map<String, Number>> map = traversal.next();
         Assert.assertFalse(traversal.hasNext());
         Assert.assertEquals(3, map.size());
         Assert.assertTrue(map.containsKey(""));
         Assert.assertTrue(map.containsKey("original"));
         Assert.assertTrue(map.containsKey("cover"));
         //
         Map<String, Number> subMap = map.get("");
         Assert.assertEquals(1, subMap.size());
         Assert.assertEquals(179350, subMap.get("followedBy").intValue());
         //
         subMap = map.get("original");
 //        Assert.assertEquals(3, subMap.size());
         Assert.assertEquals(2185613, subMap.get("followedBy").intValue());
 //        Assert.assertEquals(0, subMap.get("writtenBy").intValue());
 //        Assert.assertEquals(0, subMap.get("sungBy").intValue());
         //
         subMap = map.get("cover");
 //        Assert.assertEquals(3, subMap.size());
         Assert.assertEquals(777982, subMap.get("followedBy").intValue());
 //        Assert.assertEquals(0, subMap.get("writtenBy").intValue());
 //        Assert.assertEquals(0, subMap.get("sungBy").intValue());
     }
 
     @Test
     public void testSummingNothing() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 1);
         this.sqlgGraph.addVertex(T.label, "A", "name", "a4", "age", 1);
         this.sqlgGraph.tx().commit();
 
         Traversal<Vertex, Map<String, Integer>> traversal = this.sqlgGraph.traversal()
                 .V().has("name", "a5")
                 .<String, Integer>group().by(T.label).by(__.values("age").sum());
         printTraversalForm(traversal);
         Assert.assertTrue(traversal.hasNext());
         System.out.println(traversal.next());
     }
 
     @Test
     public void testCount() {
         this.sqlgGraph.addVertex(T.label, "A", "name", "a");
         this.sqlgGraph.addVertex(T.label, "A", "name", "a");
         this.sqlgGraph.addVertex(T.label, "A", "name", "a");
         this.sqlgGraph.addVertex(T.label, "A", "name", "a");
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_A\"""", sql);
         }
         Assert.assertEquals(4, traversal.next(), 0);
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgCountGlobalStep);
     }
 
     @Test
     public void testCountStartEdge() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a");
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b");
         a1.addEdge("ab", b1);
         this.sqlgGraph.tx().commit();
         List<Vertex> vertices = this.sqlgGraph.traversal().V().hasLabel("A").outE().otherV().toList();
         Assert.assertEquals(1, vertices.size());
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().hasLabel("A").outE().otherV().count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID\"""", sql);
         }
         Assert.assertEquals(1, traversal.next(), 0);
     }
 
     @Test
     public void testCountWithJoins() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a", "age", 1);
         Vertex b1 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b2 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         Vertex b3 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 5);
         Vertex b4 = this.sqlgGraph.addVertex(T.label, "B", "name", "b", "age", 2);
         a1.addEdge("ab", b1);
         a1.addEdge("ab", b2);
         a1.addEdge("ab", b3);
         a1.addEdge("ab", b4);
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().hasLabel("A").out("ab").count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_A" INNER JOIN
                     \t"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     \t"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID\"""", sql);
         }
         Assert.assertEquals(4, traversal.next(), 0);
         Assert.assertFalse(traversal.hasNext());
         Traversal<Vertex, Integer> maxTraversal = this.sqlgGraph.traversal().V().outE().otherV().values("age").max();
         sql = getSQL(maxTraversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	MAX("public"."V_B"."age") AS "alias1"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     	"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"\
                     """, sql);
         }
         Assert.assertEquals(5, maxTraversal.next(), 0);
         Assert.assertFalse(maxTraversal.hasNext());
         traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().outE().otherV().count();
         sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_ab" ON "public"."V_A"."ID" = "public"."E_ab"."public.A__O" INNER JOIN
                     	"public"."V_B" ON "public"."E_ab"."public.B__I" = "public"."V_B"."ID"\
                     """, sql);
         }
         Assert.assertEquals(4, traversal.next(), 0);
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void testCountMultipleLabels() {
         this.sqlgGraph.addVertex(T.label, "A");
         this.sqlgGraph.addVertex(T.label, "A");
         this.sqlgGraph.addVertex(T.label, "A");
         this.sqlgGraph.addVertex(T.label, "A");
         this.sqlgGraph.addVertex(T.label, "B", "name", "b1");
         this.sqlgGraph.addVertex(T.label, "B", "name", "b2");
         this.sqlgGraph.addVertex(T.label, "B", "name", "b3");
         this.sqlgGraph.addVertex(T.label, "B", "name", "b4");
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             String sql1 = """
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_A"\
                     """;
             String sql2 = """
                     SELECT
                     	COUNT(1) AS "count"
                     FROM
                     	"public"."V_B"\
                     """;
             if (!sql1.equals(sql) && !sql2.equals(sql)) {
                 Assert.fail(sql + " not found");
             }
         }
         Assert.assertEquals(8, traversal.next(), 0);
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgCountGlobalStep);
     }
 
     @Test
     public void testCountDuplicatePaths() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1");
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2");
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3");
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a4");
         a1.addEdge("aa", a2);
         a2.addEdge("aa", a3);
         a2.addEdge("aa", a4);
         this.sqlgGraph.tx().commit();
 
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V(a1).out().out().count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	COUNT(1)\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1" INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias2"
                     FROM
                     	"public"."V_A"
                     ) a3 ON a2."public.E_aa.public.A__I" = a3."alias2"\
                     """, sql);
         }
         Assert.assertEquals(2, traversal.next(), 0);
 
         Assert.assertEquals(3, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgCountGlobalStep);
     }
 
     @Test
     public void testCountWithUnion() {
         loadModern();
         final DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal) this.sqlgGraph.traversal().V()
                 .has("person", "name", "marko")
                 .has("name", "marko")
                 .count().as("a")
                 .union(__.identity(), __.identity())
                 .select("a");
         checkResults(Arrays.asList(1L, 1L), traversal);
         Assert.assertEquals(5, traversal.getSteps().size());
         Assert.assertTrue(traversal.getSteps().get(0) instanceof SqlgGraphStep);
         Assert.assertTrue(traversal.getSteps().get(1) instanceof SqlgPropertiesStep);
         Assert.assertTrue(traversal.getSteps().get(2) instanceof SqlgCountGlobalStep);
     }
 
     @Test
     public void testCountOnPropertyNotYetExists() {
         this.sqlgGraph.addVertex(T.label, "Person");
         this.sqlgGraph.tx().commit();
         DefaultTraversal<Vertex, Long> traversal = (DefaultTraversal<Vertex, Long>) this.sqlgGraph.traversal().V().has(T.label, "Person").has("name", "john").count();
         List<Long> count = traversal.toList();
         Assert.assertEquals(1, count.size());
         Assert.assertEquals(0L, count.get(0), 0);
     }
 
     @Test
     public void testMaxDuplicatePaths() {
         Vertex a1 = this.sqlgGraph.addVertex(T.label, "A", "name", "a1", "age", 1);
         Vertex a2 = this.sqlgGraph.addVertex(T.label, "A", "name", "a2", "age", 2);
         Vertex a3 = this.sqlgGraph.addVertex(T.label, "A", "name", "a3", "age", 3);
         Vertex a4 = this.sqlgGraph.addVertex(T.label, "A", "name", "a4", "age", 4);
         a1.addEdge("aa", a2);
         a2.addEdge("aa", a3);
         a2.addEdge("aa", a4);
         this.sqlgGraph.tx().commit();
 
         Traversal<Vertex, Integer> traversal = this.sqlgGraph.traversal().V(a1).out().out().values("age").max();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     	MAX(a3."alias3")\s
                     FROM (SELECT
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     WHERE
                     	( "public"."V_A"."ID" = ?)
                     ) a1 INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias1",
                     	"public"."E_aa"."public.A__I" AS "public.E_aa.public.A__I"
                     FROM
                     	"public"."V_A" INNER JOIN
                     	"public"."E_aa" ON "public"."V_A"."ID" = "public"."E_aa"."public.A__O"
                     ) a2 ON a1."public.E_aa.public.A__I" = a2."alias1" INNER JOIN (SELECT
                     	"public"."V_A"."ID" AS "alias2",
                     	"public"."V_A"."age" AS "alias3"
                     FROM
                     	"public"."V_A"
                     ) a3 ON a2."public.E_aa.public.A__I" = a3."alias2"\
                     """, sql);
         }
         Assert.assertEquals(4, traversal.next(), 0);
     }
 
     @Test
     public void testUserSuppliedPKCount() {
         this.sqlgGraph.getTopology().getPublicSchema()
                 .ensureVertexLabelExist(
                         "Person",
                         new HashMap<>() {{
                             put("uid", PropertyDefinition.of(PropertyType.varChar(100)));
                             put("name", PropertyDefinition.of(PropertyType.varChar(100)));
                         }},
                         ListOrderedSet.listOrderedSet(Collections.singletonList("uid"))
                 );
         Vertex marko = this.sqlgGraph.addVertex(T.label, "Person", "uid", UUID.randomUUID().toString(), "name", "marko");
         this.sqlgGraph.tx().commit();
         Vertex john = this.sqlgGraph.addVertex(T.label, "Person", "uid", UUID.randomUUID().toString());
         john.property("name", "john");
         this.sqlgGraph.tx().commit();
         Traversal<Vertex, Long> traversal = this.sqlgGraph.traversal().V().hasLabel("Person").count();
         String sql = getSQL(traversal);
         if (isPostgres()) {
             Assert.assertEquals("""
                     SELECT
                     \tCOUNT(1) AS "count"
                     FROM
                     \t"public"."V_Person\"""", sql);
         }
         Assert.assertEquals(2, traversal.next().intValue());
         Assert.assertEquals("marko", this.sqlgGraph.traversal().V(marko).next().value("name"));
         Assert.assertEquals("john", this.sqlgGraph.traversal().V(john).next().value("name"));
     }
 
     /**
      * This test BaseStrategy skipping optimizing count which comes after a SqlgPropertiesStep
      */
     @Test
     public void testAndColumns() {
         Vertex v1 = this.sqlgGraph.addVertex(T.label, "Person", "name1", "marko");
         this.sqlgGraph.tx().commit();
         Assert.assertEquals(1, vertexTraversal(this.sqlgGraph, v1).properties().count().next(), 0);
         Vertex v2 = this.sqlgGraph.addVertex(T.label, "Person", "name2", "john");
         Assert.assertEquals(2, this.sqlgGraph.traversal().V().count().next(), 0);
         Assert.assertEquals(v2, this.sqlgGraph.traversal().V(v2.id()).next());
         Assert.assertEquals(1, vertexTraversal(this.sqlgGraph, v2).properties().count().next(), 0);
     }
 
     @Test
     public void shouldFilterEdgeCriterion() {
         loadModern();
         final Traversal<Edge, ?> edgeCriterion = __.or(
                 __.has("weight", 1.0d).hasLabel("knows"), // 8
                 __.has("weight", 0.4d).hasLabel("created").outV().has("name", "marko"), // 9
                 __.has("weight", 1.0d).hasLabel("created") // 10
         );
 
         GraphTraversalSource g = this.sqlgGraph.traversal();
         final SubgraphStrategy strategy = SubgraphStrategy.build().edges(edgeCriterion).create();
         final GraphTraversalSource sg = g.withStrategies(strategy);
 
         Object josh = convertToVertexId("josh");
         Assert.assertEquals(3, g.V(josh).both().count().next().longValue());
         Assert.assertEquals(2, sg.V(josh).both().count().next().longValue());
     }
 
     @Test
     public void testMinAgain() {
         final Traversal<Vertex, Comparable> traversal = this.sqlgGraph.traversal().V().values("foo").inject(9999999999L).min();
         printTraversalForm(traversal);
         Assert.assertTrue(traversal.hasNext());
         Assert.assertEquals(9999999999L, traversal.next());
         Assert.assertFalse(traversal.hasNext());
     }
 
     @Test
     public void g_V_groupXaX_byXnameX_capXaX() {
         loadModern();
         final Traversal<Vertex, Map<String, Collection<Vertex>>> traversal = this.sqlgGraph.traversal().V().group("a").by("name").cap("a");
         printTraversalForm(traversal);
         final Map<String, Collection<Vertex>> map = traversal.next();
         Assert.assertEquals(6, map.size());
         map.forEach((key, values) -> {
             Assert.assertEquals(1, values.size());
             Assert.assertEquals(convertToVertexId(key), values.iterator().next().id());
         });
         Assert.assertFalse(traversal.hasNext());
 //        checkSideEffects(traversal.asAdmin().getSideEffects(), "a", HashMap.class);
     }
 }