Xiaomeng Huang created HIVE-16936:
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Summary: wrong result with CTAS(create table as select)
Key: HIVE-16936
URL: https://issues.apache.org/jira/browse/HIVE-16936
Project: Hive
Issue Type: Bug
Affects Versions: 1.2.1
Reporter: Xiaomeng Huang
Priority: Critical
1.
{code}
hive> select 'test' as did from abc_test_old
> where did = '5FCAFD34-C124-4E13-AF65-27B675C945CC' limit 1;
OK
test
{code}
result is 'test'
2.
{code}
hive> create table abc_test_12345 as
> select 'test' as did from abc_test_old
> where did = '5FCAFD34-C124-4E13-AF65-27B675C945CC' limit 1;
hive> select did from abc_test_12345 limit 1;
OK
5FCAFD34-C124-4E13-AF65-27B675C945CC
{code}
result is '5FCAFD34-C124-4E13-AF65-27B675C945CC'
why result is not 'test'?
3.
{code}
hive> explain
> create table abc_test_12345 as
> select 'test' as did from abc_test_old
> where did = '5FCAFD34-C124-4E13-AF65-27B675C945CC' limit 1;
OK
STAGE DEPENDENCIES:
Stage-1 is a root stage
Stage-6 depends on stages: Stage-1 , consists of Stage-3, Stage-2, Stage-4
Stage-3
Stage-0 depends on stages: Stage-3, Stage-2, Stage-5
Stage-7 depends on stages: Stage-0
Stage-2
Stage-4
Stage-5 depends on stages: Stage-4
STAGE PLANS:
Stage: Stage-1
Map Reduce
Map Operator Tree:
TableScan
alias: abc_test_old
Statistics: Num rows: 32 Data size: 1152 Basic stats: COMPLETE
Column stats: NONE
Filter Operator
predicate: (did = '5FCAFD34-C124-4E13-AF65-27B675C945CC') (type:
boolean)
Statistics: Num rows: 16 Data size: 576 Basic stats: COMPLETE
Column stats: NONE
Select Operator
Statistics: Num rows: 16 Data size: 576 Basic stats: COMPLETE
Column stats: NONE
Limit
Number of rows: 1
Statistics: Num rows: 1 Data size: 36 Basic stats: COMPLETE
Column stats: NONE
Reduce Output Operator
sort order:
Statistics: Num rows: 1 Data size: 36 Basic stats: COMPLETE
Column stats: NONE
Reduce Operator Tree:
Select Operator
expressions: '5FCAFD34-C124-4E13-AF65-27B675C945CC' (type: string)
outputColumnNames: _col0
Statistics: Num rows: 1 Data size: 36 Basic stats: COMPLETE Column
stats: NONE
Limit
Number of rows: 1
Statistics: Num rows: 1 Data size: 36 Basic stats: COMPLETE Column
stats: NONE
File Output Operator
compressed: true
Statistics: Num rows: 1 Data size: 36 Basic stats: COMPLETE
Column stats: NONE
table:
input format: org.apache.hadoop.hive.ql.io.orc.OrcInputFormat
output format:
org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat
serde: org.apache.hadoop.hive.ql.io.orc.OrcSerde
name: default.abc_test_12345
......
{code}
why expressions is '5FCAFD34-C124-4E13-AF65-27B675C945CC'
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