title: strange group by error occuring SOMETIMES
body: <p>I "SOMETIMES" get the below exception on my server logs when executing the query. Query has a group by statement. If i remove the GROUP BY i never get the exception. Also not all queries with group by get the exception. Only some of them are victims.</p>
  
  <p>I have two server in cluster and a client node. </p>
  
  <p>Is there any problem with the query or am i hitting to a bug because the exception occurs randomly. The strange thing is that not all the queries got this exception. I think the query structure is OK.</p>
  
  <pre><code>Caused by: org.h2.jdbc.JdbcSQLException: Column "PR__Z0._VAL" must be in the GROUP BY list; SQL statement: 
  SELECT 
  PR__Z0._VAL __C0_0, 
  PR__Z0."dailyRock" __C0_1, 
  PR__Z0."productId" __C0_2 
  FROM TABLE("category" CHAR=?1) T__Z2 
   INNER JOIN ACC_6185BAEEDA626000."ProductCategory" PC__Z1 
   ON TRUE 
   INNER JOIN ACC_6185BAEEDA626000."ProductRecord" PR__Z0 
   ON TRUE 
  WHERE (PC__Z1."language" = ?2) AND ((PC__Z1."category" = T__Z2."category") AND (PR__Z0."productId" = PC__Z1."productId")) 
  GROUP BY PR__Z0."productId" 
  ORDER BY 2 DESC LIMIT ?3 + ?4 [90016-197] 
          at org.h2.message.DbException.getJdbcSQLException(DbException.java:357) 
          at org.h2.message.DbException.get(DbException.java:179) 
          at org.h2.message.DbException.get(DbException.java:155) 
          at org.h2.expression.ExpressionColumn.updateAggregate(ExpressionColumn.java:172) 
          at org.h2.expression.Alias.updateAggregate(Alias.java:87) 
          at org.h2.command.dml.Select.queryGroup(Select.java:350) 
          at org.h2.command.dml.Select.queryWithoutCache(Select.java:628) 
          at org.h2.command.dml.Query.queryWithoutCacheLazyCheck(Query.java:114) 
          at org.h2.command.dml.Query.query(Query.java:352) 
          at org.h2.command.dml.Query.query(Query.java:333) 
          at org.h2.command.CommandContainer.query(CommandContainer.java:114) 
          at org.h2.command.Command.executeQuery(Command.java:202) 
          at org.h2.jdbc.JdbcPreparedStatement.executeQuery(JdbcPreparedStatement.java:114) 
          at org.apache.ignite.internal.processors.query.h2.PreparedStatementExImpl.executeQuery(PreparedStatementExImpl.java:67) 
          at org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.executeSqlQuery(IgniteH2Indexing.java:1421) 
          ... 7 more
  </code></pre>