[
https://issues.apache.org/jira/browse/CALCITE-5971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Benchao Li resolved CALCITE-5971.
---------------------------------
Resolution: Fixed
Merged via
https://github.com/apache/calcite/commit/a921eb26a23435b05fdee1d404e9b4ee2f65421d
[~shenlang] Thanks for your contribution!
> Add the RelRule to rewrite the bernoulli sample as Filter
> ----------------------------------------------------------
>
> Key: CALCITE-5971
> URL: https://issues.apache.org/jira/browse/CALCITE-5971
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Reporter: LakeShen
> Assignee: LakeShen
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.36.0
>
>
> For the following SQL:
> {code:java}
> select deptno from "scott".dept tablesample bernoulli(50); {code}
> We could rewrite it to:
> {code:java}
> select deptno from "scott".dept where rand() < 0.5; {code}
> The sql :
> {code:java}
> select deptno from "scott".dept tablesample bernoulli(50) REPEATABLE(10);
> {code}
> We could rewrite it to:
> {code:java}
> select deptno from "scott".dept where rand(10) < 0.5; {code}
> This rule only rewrite the tablesample bernoulli,and this rule is like
> presto/trino's
> [ImplementBernoulliSampleAsFilter|https://github.com/prestodb/presto/blob/6eef062bdd3777936fa29127e728edde86a681d4/presto-main/src/main/java/com/facebook/presto/sql/planner/iterative/rule/ImplementBernoulliSampleAsFilter.java#L47C1-L48C35]
> rule
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
