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Posted to issues-all@impala.apache.org by "Bikramjeet Vig (JIRA)" <ji...@apache.org> on 2019/06/24 18:05:00 UTC
[jira] [Created] (IMPALA-8702) PlannerTest.testJoins flakiness due
to reliance on an exact cardinality estimate
Bikramjeet Vig created IMPALA-8702:
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Summary: PlannerTest.testJoins flakiness due to reliance on an exact cardinality estimate
Key: IMPALA-8702
URL: https://issues.apache.org/jira/browse/IMPALA-8702
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 3.3.0
Reporter: Bikramjeet Vig
Assignee: Fang-Yu Rao
The following test case is failing in PlannerTest.testJoins.
{noformat}
Section PLAN of query:
select * from functional_text_lzo.emptytable a inner join
functional_text_lzo.alltypes b on a.f2 = b.int_col
Actual does not match expected result:
PLAN-ROOT SINK
|
02:HASH JOIN [INNER JOIN]
| hash predicates: b.int_col = a.f2
| runtime filters: RF000 <- a.f2
| row-size=96B cardinality=5.66K
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|--00:SCAN HDFS [functional_text_lzo.emptytable a]
| partitions=0/0 files=0 size=0B
| row-size=16B cardinality=0
|
01:SCAN HDFS [functional_text_lzo.alltypes b]
HDFS partitions=24/24 files=24 size=123.54KB
runtime filters: RF000 -> b.int_col
row-size=80B cardinality=5.66K
Expected:
PLAN-ROOT SINK
|
02:HASH JOIN [INNER JOIN]
| hash predicates: b.int_col = a.f2
| runtime filters: RF000 <- a.f2
| row-size=96B cardinality=5.65K
|
|--00:SCAN HDFS [functional_text_lzo.emptytable a]
| partitions=0/0 files=0 size=0B
| row-size=16B cardinality=0
|
01:SCAN HDFS [functional_text_lzo.alltypes b]
HDFS partitions=24/24 files=24 size=123.32KB
runtime filters: RF000 -> b.int_col
row-size=80B cardinality=5.65K
Verbose plan:
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
Per-Host Resources: mem-estimate=130.94MB mem-reservation=2.95MB thread-reservation=2 runtime-filters-memory=1.00MB
PLAN-ROOT SINK
| mem-estimate=0B mem-reservation=0B thread-reservation=0
|
02:HASH JOIN [INNER JOIN]
| hash predicates: b.int_col = a.f2
| fk/pk conjuncts: assumed fk/pk
| runtime filters: RF000[bloom] <- a.f2
| mem-estimate=1.94MB mem-reservation=1.94MB spill-buffer=64.00KB thread-reservation=0
| tuple-ids=1,0 row-size=96B cardinality=5.66K
| in pipelines: 01(GETNEXT), 00(OPEN)
|
|--00:SCAN HDFS [functional_text_lzo.emptytable a]
| partitions=0/0 files=0 size=0B
| stored statistics:
| table: rows=unavailable size=unavailable
| partitions: 0/0 rows=unavailable
| columns missing stats: field
| extrapolated-rows=disabled max-scan-range-rows=0
| mem-estimate=0B mem-reservation=0B thread-reservation=0
| tuple-ids=0 row-size=16B cardinality=0
| in pipelines: 00(GETNEXT)
|
01:SCAN HDFS [functional_text_lzo.alltypes b]
HDFS partitions=24/24 files=24 size=123.54KB
runtime filters: RF000[bloom] -> b.int_col
stored statistics:
table: rows=unavailable size=unavailable
partitions: 0/24 rows=unavailable
columns missing stats: int_col, id, bool_col, tinyint_col, smallint_col, bigint_col, float_col, double_col, date_string_col, string_col, timestamp_col
extrapolated-rows=disabled max-scan-range-rows=unavailable
mem-estimate=128.00MB mem-reservation=8.00KB thread-reservation=1
tuple-ids=1 row-size=80B cardinality=5.66K
in pipelines: 01(GETNEXT)
{noformat}
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