[
https://issues.apache.org/jira/browse/TAJO-338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hyunsik Choi updated TAJO-338:
------------------------------
Attachment: TAJO-338.patch
This patch does as follows:
* Add PartitionedTableScanNode
* Add a rewrite rule named PartitionedTableRewriter
** First of all, PartitionedTableRewriter finds partition predicates from
search condition.
*** A partition predicate must be a simple predicate, meaning one column
reference and one constant with one of =, <, <=, >, >=, IN, and LIKE predicate
operators.
** PartitionedTableRewriter also finds necessary partition paths via
PathFilters generated from partition predicates.
** Then, it rewrites ScanNode to PartitionedTableScanNode with filtered
partition paths.
* Some methods in EvalTreeUtil and AlgebraUtil are refactored and renamed to
more comprehensive names.
* Rename Partitions to PartitionDesc
* Add some schema rewrite methods to ColumnPartitionedTableStoreExec and
SeqScan
** Column Partitioned Table aims at hive-compatible table partition.
** As a result, scan does not read field values corresponding to partition
key columns from files, and store does not store field values to files.
** Instead of, field values corresponding to partition key columns are just
retrieved from a partition path.
** For that, the rewriter usually removes partition key columns from actual
input schema of scan plan and output schema of store plan.
> Add Query Optimization Part for Column-Partitioned Tables
> ---------------------------------------------------------
>
> Key: TAJO-338
> URL: https://issues.apache.org/jira/browse/TAJO-338
> Project: Tajo
> Issue Type: Sub-task
> Components: storage
> Affects Versions: 0.8-incubating
> Reporter: JaeHwa Jung
> Assignee: Hyunsik Choi
> Fix For: 0.8-incubating
>
> Attachments: TAJO-338.patch
>
>
> If user write partitioned column at where clause, Tajo must make a plan to
> scan a partition directory path. So, Planner needs to improve for partitioned
> table.
--
This message was sent by Atlassian JIRA
(v6.1.4#6159)
