Assert when <table>.<star> notation is used in union all query

0: jdbc:drill:schema=dfs> select t1.*, t2.* from t1, t2 where t1.c1 = t2.c2 union all select t1.*, t3.* from t1, t3 where t1.c1 = t3.c3;
+------------+------------+------------+------------+------------+------------+
|     a1     |     b1     |     c1     |     a2     |     b2     |     c2     |
+------------+------------+------------+------------+------------+------------+
| 1          | aaaaa      | 2015-01-01 | 1          | aaaaa      | 2015-01-01 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 3          | ccccc      | 2015-01-03 | 3          | ccccc      | 2015-01-03 |
| 4          | null       | 2015-01-04 | 4          | ddddd      | 2015-01-04 |
| 5          | eeeee      | 2015-01-05 | 5          | eeeee      | 2015-01-05 |
| 6          | fffff      | 2015-01-06 | 6          | fffff      | 2015-01-06 |
| 7          | ggggg      | 2015-01-07 | 7          | ggggg      | 2015-01-07 |
| 7          | ggggg      | 2015-01-07 | 7          | ggggg      | 2015-01-07 |
| null       | hhhhh      | 2015-01-08 | 8          | hhhhh      | 2015-01-08 |
java.lang.IndexOutOfBoundsException: index: 0, length: 1 (expected: range(0, 0))
        at io.netty.buffer.DrillBuf.checkIndexD(DrillBuf.java:156)
        at io.netty.buffer.DrillBuf.chk(DrillBuf.java:178)
        at io.netty.buffer.DrillBuf.getByte(DrillBuf.java:673)
        at org.apache.drill.exec.vector.UInt1Vector$Accessor.get(UInt1Vector.java:309)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.isSet(NullableIntVector.java:342)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.isNull(NullableIntVector.java:338)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.getObject(NullableIntVector.java:359)
        at org.apache.drill.exec.vector.accessor.NullableIntAccessor.getObject(NullableIntAccessor.java:98)
        at org.apache.drill.jdbc.AvaticaDrillSqlAccessor.getObject(AvaticaDrillSqlAccessor.java:136)
        at net.hydromatic.avatica.AvaticaResultSet.getObject(AvaticaResultSet.java:351)
        at sqlline.SqlLine$Rows$Row.<init>(SqlLine.java:2388)
        at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2504)
        at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
        at sqlline.SqlLine.print(SqlLine.java:1809)
        at sqlline.SqlLine$Commands.execute(SqlLine.java:3766)
        at sqlline.SqlLine$Commands.sql(SqlLine.java:3663)
        at sqlline.SqlLine.dispatch(SqlLine.java:889)
        at sqlline.SqlLine.begin(SqlLine.java:763)
        at sqlline.SqlLine.start(SqlLine.java:498)
        at sqlline.SqlLine.main(SqlLine.java:460)

0: jdbc:drill:schema=dfs> select t1.*, t2.* from t1, t2 where t1.c1 = t2.c2 union all select t3.*, t3.* from t3;
+------------+------------+------------+------------+------------+------------+
|     a1     |     b1     |     c1     |     a2     |     b2     |     c2     |
+------------+------------+------------+------------+------------+------------+
| 1          | aaaaa      | 2015-01-01 | 1          | aaaaa      | 2015-01-01 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 2          | bbbbb      | 2015-01-02 | 2          | bbbbb      | 2015-01-02 |
| 3          | ccccc      | 2015-01-03 | 3          | ccccc      | 2015-01-03 |
| 4          | null       | 2015-01-04 | 4          | ddddd      | 2015-01-04 |
| 5          | eeeee      | 2015-01-05 | 5          | eeeee      | 2015-01-05 |
| 6          | fffff      | 2015-01-06 | 6          | fffff      | 2015-01-06 |
| 7          | ggggg      | 2015-01-07 | 7          | ggggg      | 2015-01-07 |
| 7          | ggggg      | 2015-01-07 | 7          | ggggg      | 2015-01-07 |
| null       | hhhhh      | 2015-01-08 | 8          | hhhhh      | 2015-01-08 |
java.lang.IndexOutOfBoundsException: index: 0, length: 1 (expected: range(0, 0))
        at io.netty.buffer.DrillBuf.checkIndexD(DrillBuf.java:156)
        at io.netty.buffer.DrillBuf.chk(DrillBuf.java:178)
        at io.netty.buffer.DrillBuf.getByte(DrillBuf.java:673)
        at org.apache.drill.exec.vector.UInt1Vector$Accessor.get(UInt1Vector.java:309)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.isSet(NullableIntVector.java:342)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.isNull(NullableIntVector.java:338)
        at org.apache.drill.exec.vector.NullableIntVector$Accessor.getObject(NullableIntVector.java:359)
        at org.apache.drill.exec.vector.accessor.NullableIntAccessor.getObject(NullableIntAccessor.java:98)
        at org.apache.drill.jdbc.AvaticaDrillSqlAccessor.getObject(AvaticaDrillSqlAccessor.java:136)
        at net.hydromatic.avatica.AvaticaResultSet.getObject(AvaticaResultSet.java:351)
        at sqlline.SqlLine$Rows$Row.<init>(SqlLine.java:2388)
        at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2504)
        at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
        at sqlline.SqlLine.print(SqlLine.java:1809)
        at sqlline.SqlLine$Commands.execute(SqlLine.java:3766)
        at sqlline.SqlLine$Commands.sql(SqlLine.java:3663)
        at sqlline.SqlLine.dispatch(SqlLine.java:889)
        at sqlline.SqlLine.begin(SqlLine.java:763)
        at sqlline.SqlLine.start(SqlLine.java:498)
        at sqlline.SqlLine.main(SqlLine.java:460)

00-01      ProjectAllowDup(*=[$0], *0=[$1])
00-02        UnionAll(all=[true])
00-04          Project(T29¦¦*=[$0], T30¦¦*=[$2])
00-06            HashJoin(condition=[=($1, $3)], joinType=[inner])
00-09              Project(T29¦¦*=[$0], c1=[$1])
00-11                Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/aggregation/sanity/t1]], selectionRoot=/aggregation/sanity/t1, numFiles=1, columns=[`*`]]])
00-08              Project(T30¦¦*=[$0], c2=[$1])
00-10                Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/aggregation/sanity/t2]], selectionRoot=/aggregation/sanity/t2, numFiles=1, columns=[`*`]]])
00-03          Project(T31¦¦*=[$0], T31¦¦*0=[$0])
00-05            Project(T31¦¦*=[$0])
00-07              Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/aggregation/sanity/t3]], selectionRoot=/aggregation/sanity/t3, numFiles=1, columns=[`*`]]])

create table t1(a1, b1, c1) as
select
        case when columns[0] = '' then cast(null as integer) else cast(columns[0] as integer) end,
        case when columns[1] = '' then cast(null as varchar(10)) else cast(columns[1] as varchar(10)) end,
        case when columns[2] = '' then cast(null as date) else cast(columns[2] as date) end
from `t1.csv`;

create table t2(a2, b2, c2) as
select
        case when columns[0] = '' then cast(null as integer) else cast(columns[0] as integer) end,
        case when columns[1] = '' then cast(null as varchar(10)) else cast(columns[1] as varchar(10)) end,
        case when columns[2] = '' then cast(null as date) else cast(columns[2] as date) end
from `t2.csv`;

create table t3(a3, b3, c3) as
select
        case when columns[0] = '' then cast(null as integer) else cast(columns[0] as integer) end,
        case when columns[1] = '' then cast(null as varchar(10)) else cast(columns[1] as varchar(10)) end,
        case when columns[2] = '' then cast(null as date) else cast(columns[2] as date) end
from `t3.csv`;