Brock Noland created HIVE-4108:
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Summary: Allow over() clause to contain an order by with no
partition by
Key: HIVE-4108
URL: https://issues.apache.org/jira/browse/HIVE-4108
Project: Hive
Issue Type: Bug
Components: PTF-Windowing
Reporter: Brock Noland
HIVE-4073 allows over() to be called with no partition by and no order by. We
should allow only an order by.
>From the review of HIVE-4073:
Ashutosh
{noformat}
Can you also add following test. This should also work.
select p_name, p_retailprice,
avg(p_retailprice) over(order by p_name)
from part
partition by p_name;
{noformat}
Harish
{noformat}
This test will not work (:
The grammar needs to be changed so:
partitioningSpec
@init { msgs.push("partitioningSpec clause"); }
@after { msgs.pop(); }
:
partitionByClause orderByClause? -> ^(TOK_PARTITIONINGSPEC partitionByClause
orderByClause?) |
orderByClause -> ^(TOK_PARTITIONINGSPEC orderByClause) |
distributeByClause sortByClause? -> ^(TOK_PARTITIONINGSPEC distributeByClause
sortByClause?) |
sortByClause? -> ^(TOK_PARTITIONINGSPEC sortByClause) |
clusterByClause -> ^(TOK_PARTITIONINGSPEC clusterByClause)
;
And the SemanticAnalyzer::processPTFPartitionSpec has to handle this shape of
the AST Tree. The PTFTranslator also needs changes. Do this as another Jira
{noformat}
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