[
https://issues.apache.org/jira/browse/SPARK-31470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yuming Wang updated SPARK-31470:
Description:
We usually sort on frequently filtered columns when writing data to improve
query performance. But there is no these info in the table information.
{code:sql}
CREATE TABLE t(day INT, hour INT, year INT, month INT)
USING parquet
PARTITIONED BY (year, month)
SORTED BY (day, hour);
{code}
Impala, Oracle and redshift support this clause:
https://issues.apache.org/jira/browse/IMPALA-4166
https://docs.oracle.com/database/121/DWHSG/attcluster.htm#GUID-DAECFBC5-FD1A-45A5-8C2C-DC9884D0857B
https://docs.aws.amazon.com/redshift/latest/dg/t_Sorting_data-compare-sort-styles.html
was:
We usually sort on frequently filtered columns when writing data to improve
query performance. But there is no these info in the table information.
{code:sql}
CREATE TABLE t(day INT, hour INT, year INT, month INT)
USING parquet
PARTITIONED BY (year, month)
SORTED BY (day, hour);
{code}
Impala and redshift support this clause:
https://issues.apache.org/jira/browse/IMPALA-4166
https://docs.aws.amazon.com/redshift/latest/dg/t_Sorting_data-compare-sort-styles.html
> Introduce SORTED BY clause in CREATE TABLE statement
>
>
> Key: SPARK-31470
> URL: https://issues.apache.org/jira/browse/SPARK-31470
> Project: Spark
> Issue Type: Improvement
> Components: SQL
>Affects Versions: 3.0.0
>Reporter: Yuming Wang
>Priority: Major
>
> We usually sort on frequently filtered columns when writing data to improve
> query performance. But there is no these info in the table information.
>
> {code:sql}
> CREATE TABLE t(day INT, hour INT, year INT, month INT)
> USING parquet
> PARTITIONED BY (year, month)
> SORTED BY (day, hour);
> {code}
>
> Impala, Oracle and redshift support this clause:
> https://issues.apache.org/jira/browse/IMPALA-4166
> https://docs.oracle.com/database/121/DWHSG/attcluster.htm#GUID-DAECFBC5-FD1A-45A5-8C2C-DC9884D0857B
> https://docs.aws.amazon.com/redshift/latest/dg/t_Sorting_data-compare-sort-styles.html
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
-
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
