[DRILL-707] Limit Operator incorrectly reports sv2 mode

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Client - C++
• Assignee: Jinfeng Ni
• Reporter: Xiaomeng Huang
• Created: 13/May/14 01:02
• Updated: 31/Jul/14 06:33
• Resolved: 15/May/14 20:15

Description

Drill C++ client needs to support selection vector.
The drillbit should never be sending sv2 to client.
Queries with limit operator will return record batch with selection vector as true.

For example, given the following hive table,

+------------+------------+
| keycolumn  |  column1   |
+------------+------------+
| Zero       | 0          |
| One        | 1          |
| MinusOne   | -1         |
| Two        | 2          |
| MaxTInt    | 127        |
| MinTInt    | -128       |
| MaxUTInt   | 255        |
| MaxTIntP1  | 128        |
| MinTIntM1  | -129       |
| MaxUTIntP1 | 256        |
| MaxSInt    | 32767      |
| MinSInt    | -32768     |
| MaxUSInt   | 65535      |
| MinSIntM1  | -32769     |
| MaxSIntP1  | 32768      |
| MaxUSIntP1 | 65536      |
| MaxInt     | 2147483647 |
| MinInt     | -2147483648 |
| MaxUInt    | 4294967295 |
| MaxIntP1   | 2147483648 |
| MinIntM1   | -2147483649 |
| MaxUIntP1  | 4294967296 |
| MaxBInt    | 9223372036854775807 |
| MinBInt    | -9223372036854775808 |
+------------+------------+

We issue the following two queries:
Query 1:

select column1 from hivestg.`bigint_table` where keycolumn='Zero'

Query 2:

select column1 from hivestg.`bigint_table` limit 1

Query 2 will return record batch with is_section_vector_2 as true

Issue Links

• Is contained by: DRILL-875 C++ client - Memory handling and other issues need to be fixed