[
https://issues.apache.org/jira/browse/FLINK-30006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
lincoln lee updated FLINK-30006:
--------------------------------
Description:
In Streaming, columns generated by dynamic functions are incorrectly considered
constants and removed from an Aggregate via optimization rule
`CoreRules.AGGREGATE_PROJECT_PULL_UP_CONSTANTS` (inside the RelMdPredicates, it
only considers the non-deterministic functions, but this doesn't applicable for
streaming)
an example query:
{code}
SELECT
cat, gmt_date, SUM(cnt), count(*)
FROM t1
WHERE gmt_date = current_date
GROUP BY cat, gmt_date
{code}
the wrong plan:
{code}
Calc(select=[cat, CAST(CURRENT_DATE() AS DATE) AS gmt_date, EXPR$2, EXPR$3])
+- GroupAggregate(groupBy=[cat], select=[cat, SUM(cnt) AS EXPR$2, COUNT(*) AS
EXPR$3])
+- Exchange(distribution=[hash[cat]])
+- Calc(select=[cat, cnt], where=[=(gmt_date, CURRENT_DATE())])
+- TableSourceScan(table=[[default_catalog, default_database, t1,
filter=[], project=[cat, cnt, gmt_date], metadata=[]]], fields=[cat, cnt,
gmt_date])
{code}
In addition to this issue, we need to check all optimization rules in streaming
completely to avoid similar problems.
was:
In Streaming, columns generated by dynamic functions are incorrectly considered
constants and removed from an Aggregate via optimization rule
`CoreRules.AGGREGATE_PROJECT_PULL_UP_CONSTANTS`
an example query:
{code}
SELECT
cat, gmt_date, SUM(cnt), count(*)
FROM t1
WHERE gmt_date = current_date
GROUP BY cat, gmt_date
{code}
the wrong plan:
{code}
Calc(select=[cat, CAST(CURRENT_DATE() AS DATE) AS gmt_date, EXPR$2, EXPR$3])
+- GroupAggregate(groupBy=[cat], select=[cat, SUM(cnt) AS EXPR$2, COUNT(*) AS
EXPR$3])
+- Exchange(distribution=[hash[cat]])
+- Calc(select=[cat, cnt], where=[=(gmt_date, CURRENT_DATE())])
+- TableSourceScan(table=[[default_catalog, default_database, t1,
filter=[], project=[cat, cnt, gmt_date], metadata=[]]], fields=[cat, cnt,
gmt_date])
{code}
In addition to this issue, we need to check all optimization rules in streaming
completely to avoid similar problems.
> Cannot remove columns that are incorrectly considered constants from an
> Aggregate In Streaming
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-30006
> URL: https://issues.apache.org/jira/browse/FLINK-30006
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.16.0
> Reporter: lincoln lee
> Priority: Major
> Fix For: 1.17.0
>
>
> In Streaming, columns generated by dynamic functions are incorrectly
> considered constants and removed from an Aggregate via optimization rule
> `CoreRules.AGGREGATE_PROJECT_PULL_UP_CONSTANTS` (inside the RelMdPredicates,
> it only considers the non-deterministic functions, but this doesn't
> applicable for streaming)
> an example query:
> {code}
> SELECT
> cat, gmt_date, SUM(cnt), count(*)
> FROM t1
> WHERE gmt_date = current_date
> GROUP BY cat, gmt_date
> {code}
> the wrong plan:
> {code}
> Calc(select=[cat, CAST(CURRENT_DATE() AS DATE) AS gmt_date, EXPR$2, EXPR$3])
> +- GroupAggregate(groupBy=[cat], select=[cat, SUM(cnt) AS EXPR$2, COUNT(*) AS
> EXPR$3])
> +- Exchange(distribution=[hash[cat]])
> +- Calc(select=[cat, cnt], where=[=(gmt_date, CURRENT_DATE())])
> +- TableSourceScan(table=[[default_catalog, default_database, t1,
> filter=[], project=[cat, cnt, gmt_date], metadata=[]]], fields=[cat, cnt,
> gmt_date])
> {code}
> In addition to this issue, we need to check all optimization rules in
> streaming completely to avoid similar problems.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
