[jira] [Created] (CALCITE-1388) Error during RelNode to sql conversion

["Viktor Batytskyi (JIRA)" <ji...@apache.org>]

Viktor Batytskyi created CALCITE-1388:
-----------------------------------------

             Summary: Error during RelNode to sql conversion
                 Key: CALCITE-1388
                 URL: https://issues.apache.org/jira/browse/CALCITE-1388
             Project: Calcite
          Issue Type: Bug
          Components: core
         Environment: Oracle JDK 1.8
            Reporter: Viktor Batytskyi
            Assignee: Julian Hyde


The following query contains ROLLUP operator in GROUP BY clause. 
```
SELECT player_id, video_id, SUM(clicks)
FROM Table
GROUP BY ROLLUP((player_id, video_id))
```
After the string sql is parsed and validated by executing: 
```
      val planner = Frameworks.getPlanner(config)
      val sqlNode = planner.parse(mockedSql)
      val validatedSql = planner.validate(sqlNode)
      val relExpression = planner.rel(validatedSql).project()
```

The resulting relExpression can't be transformed back to a query:
````
  private val VERTICA = SqlDialect.DatabaseProduct.VERTICA.getDialect
....
    val sql = new RelToSqlConverter(VERTICA).visitChild(0, relNode).asQuery.toSqlString(VERTICA).getSql
 ````

The exception is thrown:
```
Caused by: java.lang.reflect.InvocationTargetException: null
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.calcite.util.ReflectUtil$2.invoke(ReflectUtil.java:531)
	... 29 common frames omitted
Caused by: java.lang.AssertionError: Internal error: While invoking method 'public org.apache.calcite.rel.rel2sql.SqlImplementor$Result org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(org.apache.calcite.rel.core.Project)'
	at org.apache.calcite.util.Util.newInternal(Util.java:792)
	at org.apache.calcite.util.ReflectUtil$2.invoke(ReflectUtil.java:534)
	at org.apache.calcite.rel.rel2sql.RelToSqlConverter.dispatch(RelToSqlConverter.java:80)
	at org.apache.calcite.rel.rel2sql.RelToSqlConverter.visitChild(RelToSqlConverter.java:84)
	at org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:125)
	... 34 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.calcite.util.ReflectUtil$2.invoke(ReflectUtil.java:531)
	... 37 common frames omitted
Caused by: java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at org.apache.calcite.sql.SqlNodeList.get(SqlNodeList.java:93)
	at org.apache.calcite.rel.rel2sql.SqlImplementor$Result$1.field(SqlImplementor.java:781)
	at org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:450)
	at org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:133)
	... 42 common frames omitted
```




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