[
https://issues.apache.org/jira/browse/HIVE-18624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Amruth S updated HIVE-18624:
----------------------------
Description:
Explain of the same query takes
0.1 to 3 seconds in hive 2.1.0 &
10-15 min in hive 2.3.2 & latest master
Sample expression below
{code:java}
EXPLAIN
SELECT DISTINCT
IF(lower('a') <= lower('a')
,'a'
,IF(('a' IS NULL AND from_unixtime(UNIX_TIMESTAMP()) <= 'a')
,'a'
,IF(if('a' = 'a', TRUE, FALSE) = 1
,'a'
,IF(('a' = 1 and lower('a') NOT IN ('a', 'a')
and lower(if('a' = 'a','a','a')) <= lower('a'))
OR ('a' like 'a' OR 'a' like 'a')
OR 'a' in ('a','a')
,'a'
,IF(if(lower('a') in ('a', 'a') and 'a'='a', TRUE, FALSE) = 1
,'a'
,IF('a'='a' and unix_timestamp(if('a' = 'a',cast('a' as
string),coalesce('a',cast('a' as string),from_unixtime(unix_timestamp())))) <=
unix_timestamp(concat_ws('a',cast(lower('a') as string),'00:00:00')) + 9*3600
,'a'
,If(lower('a') <= lower('a')
and if(lower('a') in ('a', 'a') and 'a'<>'a', TRUE, FALSE) <> 1
,'a'
,IF('a'=1 AND 'a'=1
,'a'
,IF('a' = 1 and COALESCE(cast('a' as int),0) = 0
,'a'
,IF('a' = 'a'
,'a'
,If('a' = 'a' AND
lower('a')>lower(if(lower('a')<1830,'a',cast(date_add('a',1) as timestamp)))
,'a'
,IF('a' = 1
,IF('a' in ('a', 'a') and ((unix_timestamp('a')-unix_timestamp('a')) / 60) >
30 and 'a' = 1
,'a', 'a')
,IF(if('a' = 'a', FALSE, TRUE ) = 1 AND 'a' IS NULL
,'a'
,IF('a' = 1 and 'a'>0
, 'a'
,IF('a' = 1 AND 'a' ='a'
,'a'
,IF('a' is not null and 'a' is not null and 'a' > 'a'
,'a'
,IF('a' = 1
,'a'
,IF('a' = 'a'
,'a'
,If('a' = 1
,'a'
,IF('a' = 1
,'a'
,IF('a' = 1
,'a'
,IF('a' ='a' and 'a' ='a' and cast(unix_timestamp('a') as int) + 93600 <
cast(unix_timestamp() as int)
,'a'
,IF('a' = 'a'
,'a'
,IF('a' = 'a' and 'a' in ('a','a','a')
,'a'
,IF('a' = 'a'
,'a','a'))
)))))))))))))))))))))))
AS test_comp_exp
{code}
Taking a look at [^thread_dump] shows a very large function stack getting
created.
was:
Explain of the same query takes
0.1 to 3 seconds in hive 2.1.0 &
10-15 min in hive 2.3.2
Sample expression below
{code:java}
EXPLAIN
SELECT DISTINCT
IF(lower('a') <= lower('a')
,'a'
,IF(('a' IS NULL AND from_unixtime(UNIX_TIMESTAMP()) <= 'a')
,'a'
,IF(if('a' = 'a', TRUE, FALSE) = 1
,'a'
,IF(('a' = 1 and lower('a') NOT IN ('a', 'a')
and lower(if('a' = 'a','a','a')) <= lower('a'))
OR ('a' like 'a' OR 'a' like 'a')
OR 'a' in ('a','a')
,'a'
,IF(if(lower('a') in ('a', 'a') and 'a'='a', TRUE, FALSE) = 1
,'a'
,IF('a'='a' and unix_timestamp(if('a' = 'a',cast('a' as
string),coalesce('a',cast('a' as string),from_unixtime(unix_timestamp())))) <=
unix_timestamp(concat_ws('a',cast(lower('a') as string),'00:00:00')) + 9*3600
,'a'
,If(lower('a') <= lower('a')
and if(lower('a') in ('a', 'a') and 'a'<>'a', TRUE, FALSE) <> 1
,'a'
,IF('a'=1 AND 'a'=1
,'a'
,IF('a' = 1 and COALESCE(cast('a' as int),0) = 0
,'a'
,IF('a' = 'a'
,'a'
,If('a' = 'a' AND
lower('a')>lower(if(lower('a')<1830,'a',cast(date_add('a',1) as timestamp)))
,'a'
,IF('a' = 1
,IF('a' in ('a', 'a') and ((unix_timestamp('a')-unix_timestamp('a')) / 60) >
30 and 'a' = 1
,'a', 'a')
,IF(if('a' = 'a', FALSE, TRUE ) = 1 AND 'a' IS NULL
,'a'
,IF('a' = 1 and 'a'>0
, 'a'
,IF('a' = 1 AND 'a' ='a'
,'a'
,IF('a' is not null and 'a' is not null and 'a' > 'a'
,'a'
,IF('a' = 1
,'a'
,IF('a' = 'a'
,'a'
,If('a' = 1
,'a'
,IF('a' = 1
,'a'
,IF('a' = 1
,'a'
,IF('a' ='a' and 'a' ='a' and cast(unix_timestamp('a') as int) + 93600 <
cast(unix_timestamp() as int)
,'a'
,IF('a' = 'a'
,'a'
,IF('a' = 'a' and 'a' in ('a','a','a')
,'a'
,IF('a' = 'a'
,'a','a'))
)))))))))))))))))))))))
AS test_comp_exp
{code}
Taking a look at [^thread_dump] shows a very large function stack getting
created.
> Parsing time is very high in certain complex expressions
> --------------------------------------------------------
>
> Key: HIVE-18624
> URL: https://issues.apache.org/jira/browse/HIVE-18624
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.3.2
> Reporter: Amruth S
> Priority: Major
> Attachments: thread_dump
>
>
> Explain of the same query takes
> 0.1 to 3 seconds in hive 2.1.0 &
> 10-15 min in hive 2.3.2 & latest master
> Sample expression below
> {code:java}
> EXPLAIN
> SELECT DISTINCT
> IF(lower('a') <= lower('a')
> ,'a'
> ,IF(('a' IS NULL AND from_unixtime(UNIX_TIMESTAMP()) <= 'a')
> ,'a'
> ,IF(if('a' = 'a', TRUE, FALSE) = 1
> ,'a'
> ,IF(('a' = 1 and lower('a') NOT IN ('a', 'a')
> and lower(if('a' = 'a','a','a')) <= lower('a'))
> OR ('a' like 'a' OR 'a' like 'a')
> OR 'a' in ('a','a')
> ,'a'
> ,IF(if(lower('a') in ('a', 'a') and 'a'='a', TRUE, FALSE) = 1
> ,'a'
> ,IF('a'='a' and unix_timestamp(if('a' = 'a',cast('a' as
> string),coalesce('a',cast('a' as string),from_unixtime(unix_timestamp()))))
> <= unix_timestamp(concat_ws('a',cast(lower('a') as string),'00:00:00')) +
> 9*3600
> ,'a'
> ,If(lower('a') <= lower('a')
> and if(lower('a') in ('a', 'a') and 'a'<>'a', TRUE, FALSE) <> 1
> ,'a'
> ,IF('a'=1 AND 'a'=1
> ,'a'
> ,IF('a' = 1 and COALESCE(cast('a' as int),0) = 0
> ,'a'
> ,IF('a' = 'a'
> ,'a'
> ,If('a' = 'a' AND
> lower('a')>lower(if(lower('a')<1830,'a',cast(date_add('a',1) as timestamp)))
> ,'a'
> ,IF('a' = 1
> ,IF('a' in ('a', 'a') and ((unix_timestamp('a')-unix_timestamp('a')) / 60)
> > 30 and 'a' = 1
> ,'a', 'a')
> ,IF(if('a' = 'a', FALSE, TRUE ) = 1 AND 'a' IS NULL
> ,'a'
> ,IF('a' = 1 and 'a'>0
> , 'a'
> ,IF('a' = 1 AND 'a' ='a'
> ,'a'
> ,IF('a' is not null and 'a' is not null and 'a' > 'a'
> ,'a'
> ,IF('a' = 1
> ,'a'
> ,IF('a' = 'a'
> ,'a'
> ,If('a' = 1
> ,'a'
> ,IF('a' = 1
> ,'a'
> ,IF('a' = 1
> ,'a'
> ,IF('a' ='a' and 'a' ='a' and cast(unix_timestamp('a') as int) + 93600 <
> cast(unix_timestamp() as int)
> ,'a'
> ,IF('a' = 'a'
> ,'a'
> ,IF('a' = 'a' and 'a' in ('a','a','a')
> ,'a'
> ,IF('a' = 'a'
> ,'a','a'))
> )))))))))))))))))))))))
> AS test_comp_exp
> {code}
>
> Taking a look at [^thread_dump] shows a very large function stack getting
> created.
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
