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Posted to dev@hive.apache.org by "Pengcheng Xiong (JIRA)" <ji...@apache.org> on 2016/10/19 22:23:58 UTC
[jira] [Created] (HIVE-15023) SimpleFetchOptimizer needs to
optimize limit=0
Pengcheng Xiong created HIVE-15023:
--------------------------------------
Summary: SimpleFetchOptimizer needs to optimize limit=0
Key: HIVE-15023
URL: https://issues.apache.org/jira/browse/HIVE-15023
Project: Hive
Issue Type: Sub-task
Reporter: Pengcheng Xiong
Assignee: Pengcheng Xiong
on current master
{code}
hive> explain select key from src limit 0;
OK
STAGE DEPENDENCIES:
Stage-0 is a root stage
STAGE PLANS:
Stage: Stage-0
Fetch Operator
limit: 0
Processor Tree:
TableScan
alias: src
Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
Select Operator
expressions: key (type: string)
outputColumnNames: _col0
Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
Limit
Number of rows: 0
Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
ListSink
Time taken: 7.534 seconds, Fetched: 20 row(s)
{code}
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