Issue 288: Some right outer join queries failed to produce the correct result or…

Issue 288: Some right outer join queries failed to produce the correct result or threw exceptions such as "column x must be in the group by list". Some right outer joins with invalid column referenced (typos) threw a NullPointerException instead of "column not found" exception.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,11 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>New database setting EARLY_FILTER to allow table implementations 
+<ul><li>Issue 288: Some right outer join queries failed to produce the correct result or
+    threw exceptions such as "column x must be in the group by list".
+</li><li>Some right outer joins with invalid column referenced (typos) threw a NullPointerException instead of
+    "column not found" exception.
+</li><li>New database setting EARLY_FILTER to allow table implementations 
     to apply filter conditions early on.
 </li><li>Cluster: in a two node cluster, if cluster node stopped, and autocommit was enabled,
     then changes on the remaining cluster node didn't get committed automatically.

h2/src/main/org/h2/table/TableFilter.java

@@ -222,6 +222,11 @@ public class TableFilter implements ColumnResolver {
      * @param item the plan item
      */
     public void setPlanItem(PlanItem item) {
+        if (item == null) {
+            // invalid plan, most likely because a column wasn't found
+            // this will result in an exception later on
+            return;
+        }
         setIndex(item.getIndex());
         if (nestedJoin != null) {
             if (item.getNestedJoinPlan() != null) {
@@ -794,8 +799,12 @@ public class TableFilter implements ColumnResolver {
             joinCondition.setEvaluatable(filter, b);
         }
         if (nestedJoin != null) {
+            // don't enable / disable the nested join filters
+            // if enabling a filter in a joined filter
+            if (this == filter) {
                 nestedJoin.setEvaluatable(nestedJoin, b);
             }
+        }
         if (join != null) {
             join.setEvaluatable(filter, b);
         }

h2/src/test/org/h2/test/synth/TestNestedJoins.java

@@ -16,6 +16,7 @@ import java.sql.Statement;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Random;
+import org.h2.constant.ErrorCode;
 import org.h2.test.TestBase;
 import org.h2.util.IOUtils;
 import org.h2.util.New;
@@ -240,6 +241,24 @@ public class TestNestedJoins extends TestBase {
         ResultSet rs;
         String sql;
 
+        // Issue 288
+        try {
+            stat.execute("select 1 from dual a right outer join (select b.x from dual b) c on unknown.x = c.x, dual d");
+            fail();
+        } catch (SQLException e) {
+            // this threw a NullPointerException
+            assertEquals(ErrorCode.COLUMN_NOT_FOUND_1, e.getErrorCode());
+        }
+
+        // Issue 288
+        stat.execute("create table test(id int primary key)");
+        stat.execute("insert into test values(1)");
+        // this threw the exception Column "T.ID" must be in the GROUP BY list
+        stat.execute("select * from test t right outer join " +
+                "(select t2.id, count(*) c from test t2 group by t2.id) x on x.id = t.id " +
+                "where t.id = 1");
+        stat.execute("drop table test");
+
         // Issue 288
         /*
         create table test(id int);