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https://issues.apache.org/jira/browse/HIVE-1694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Sichi updated HIVE-1694:
-----------------------------
Description:
The index building patch (Hive-417) is checked into trunk, this JIRA issue
tracks supporting indexes in Hive compiler & execution engine for SELECT
queries.
This is in ref. to John's comment at
https://issues.apache.org/jira/browse/HIVE-417?focusedCommentId=12884869&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12884869
on creating separate JIRA issue for tracking index usage in optimizer & query
execution.
The aim of this effort is to use indexes to accelerate query execution (for
certain class of queries). E.g.
- Filters and range scans (already being worked on by He Yongqiang as part of
HIVE-417?)
- Joins (index based joins)
- Group By, Order By and other misc cases
The proposal is multi-step:
1. Building index based operators, compiler and execution engine changes
2. Optimizer enhancements (e.g. cost-based optimizer to compare and choose
between index scans, full table scans etc.)
This JIRA initially focuses on the first step. This JIRA is expected to hold
the information about index based plans & operator implementations for above
mentioned cases.
was:
The index building patch (Hive-417) is checked into trunk, this JIRA issue
tracks supporting indexes in Hive compiler & execution engine for SELECT
queries.
This is in ref. to John's comment at
https://issues.apache.org/jira/browse/HIVE-417?focusedCommentId=12884869&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12884869
on creating separate JIRA issue for tracking index usage in optimizer & query
execution.
The aim of this effort is to use indexes to accelerate query execution (for
certain class of queries). E.g.
- Filters and range scans (already being worked on by He Yongqiang as part of
HIVE-417?)
- Joins (index based joins)
- Group By, Order By and other misc cases
The proposal is multi-step:
1. Building index based operators, compiler and execution engine changes
2. Optimizer enhancements (e.g. cost-based optimizer to compare and choose
between index scans, full table scans etc.)
This JIRA initially focuses on the first step. This JIRA is expected to hold
the information about index based plans & operator implementations for above
mentioned cases.
Summary: Accelerate GROUP BY execution using indexes (was: Accelerate
query execution using indexes)
> Accelerate GROUP BY execution using indexes
> -------------------------------------------
>
> Key: HIVE-1694
> URL: https://issues.apache.org/jira/browse/HIVE-1694
> Project: Hive
> Issue Type: New Feature
> Components: Indexing, Query Processor
> Affects Versions: 0.7.0
> Reporter: Nikhil Deshpande
> Assignee: Nikhil Deshpande
> Attachments: HIVE-1694.1.patch.txt, HIVE-1694_2010-10-28.diff,
> demo_q1.hql, demo_q2.hql
>
>
> The index building patch (Hive-417) is checked into trunk, this JIRA issue
> tracks supporting indexes in Hive compiler & execution engine for SELECT
> queries.
> This is in ref. to John's comment at
> https://issues.apache.org/jira/browse/HIVE-417?focusedCommentId=12884869&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12884869
> on creating separate JIRA issue for tracking index usage in optimizer & query
> execution.
> The aim of this effort is to use indexes to accelerate query execution (for
> certain class of queries). E.g.
> - Filters and range scans (already being worked on by He Yongqiang as part of
> HIVE-417?)
> - Joins (index based joins)
> - Group By, Order By and other misc cases
> The proposal is multi-step:
> 1. Building index based operators, compiler and execution engine changes
> 2. Optimizer enhancements (e.g. cost-based optimizer to compare and choose
> between index scans, full table scans etc.)
> This JIRA initially focuses on the first step. This JIRA is expected to hold
> the information about index based plans & operator implementations for above
> mentioned cases.
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