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https://issues.apache.org/jira/browse/CALCITE-7672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yu Xu updated CALCITE-7672:
---------------------------
Description:
The empty CAL result in the current SQL cannot be pruned by PruneEmptyRules：
{code:java}
select z + x from (
select x + y as z, x from (
select * from (values (10, 1), (30, 3)) as t (x, y)
where x + y > 50)) {code}
plan is:
{code:java}
LogicalCalc(expr#0..1=[{inputs}], expr#2=[+($t0, $t1)], expr#3=[+($t2, $t0)],
EXPR$0=[$t3])
LogicalValues(tuples=[[]]){code}
should be pruned to
{code:java}
LogicalValues(tuples=[[]]) {code}
was:
The empty CAL result in the current SQL cannot be pruned by PruneEmptyRules：
{code:java}
select z + x from (
select x + y as z, x from (
select * from (values (10, 1), (30, 3)) as t (x, y)
where x + y > 50)) {code}
plan is:
{code:java}
LogicalProject(EXPR$0=[+(+($0, $1), $0)]) LogicalFilter(condition=[>(+($0,
$1), 50)]) LogicalValues(tuples=[[{ 10, 1 }, { 30, 3 }]]) {code}
should be pruned to
{code:java}
LogicalValues(tuples=[[]]) {code}
> PruneEmptyRules should support pruning empty Calc
> -------------------------------------------------
>
> Key: CALCITE-7672
> URL: https://issues.apache.org/jira/browse/CALCITE-7672
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.42.0
> Reporter: Yu Xu
> Assignee: Yu Xu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.43.0
>
>
> The empty CAL result in the current SQL cannot be pruned by PruneEmptyRules：
> {code:java}
> select z + x from (
> select x + y as z, x from (
> select * from (values (10, 1), (30, 3)) as t (x, y)
> where x + y > 50)) {code}
> plan is:
> {code:java}
> LogicalCalc(expr#0..1=[{inputs}], expr#2=[+($t0, $t1)], expr#3=[+($t2, $t0)],
> EXPR$0=[$t3])
> LogicalValues(tuples=[[]]){code}
> should be pruned to
> {code:java}
> LogicalValues(tuples=[[]]) {code}
>
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