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https://issues.apache.org/jira/browse/FLINK-30006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-30006:
-----------------------------------
Labels: pull-request-available (was: )
> 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
> Assignee: lincoln lee
> Priority: Major
> Labels: pull-request-available
> 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}
> @Test
> def testReduceGroupKey(): Unit = {
> util.tableEnv.executeSql("""
> |CREATE TABLE t1(
> | a int,
> | b varchar,
> | cat VARCHAR,
> | gmt_date DATE,
> | cnt BIGINT,
> | PRIMARY KEY (cat) NOT ENFORCED
> |) WITH (
> | 'connector' = 'values'
> |)
> |""".stripMargin)
> util.verifyExecPlan(s"""
> |SELECT
> | cat, gmt_date, SUM(cnt), count(*)
> |FROM t1
> |WHERE gmt_date = current_date
> |GROUP BY cat, gmt_date
> |""".stripMargin)
> }
> {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}
> expect plan:
> {code}
> GroupAggregate(groupBy=[cat, gmt_date], select=[cat, gmt_date, SUM(cnt) AS
> EXPR$2, COUNT(*) AS EXPR$3])
> +- Exchange(distribution=[hash[cat, gmt_date]])
> +- Calc(select=[cat, gmt_date, cnt], where=[(gmt_date = CURRENT_DATE())])
> +- TableSourceScan(table=[[default_catalog, default_database, t1,
> filter=[], project=[cat, gmt_date, cnt], metadata=[]]], fields=[cat,
> gmt_date, cnt])
> {code}
> In addition to this issue, we need to check all optimization rules in
> streaming completely to avoid similar problems.
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