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https://issues.apache.org/jira/browse/CALCITE-5971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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LakeShen reassigned CALCITE-5971:
---------------------------------
Assignee: LakeShen
> Add the RelRule to rewrite the 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
>
> 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.
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