[HIVE-415] Long queries does not parse in Hive - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Critical
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 0.3.0
Component/s: Query Processor
Labels:
None

Hadoop Flags:

Reviewed

Description

A query like this won't parse, because the Hive grammar allows backtracking:

select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL

select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL

select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL

select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL

select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable UNION ALL
select 1 from mytable;