ulysses-you opened a new pull request, #36488:
URL: https://github.com/apache/spark/pull/36488
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### What changes were proposed in this pull request?
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Add a new leaf like node `ResolvedLeafObject` and apply to the list:
- ResolvedDBObjectName
- ResolvedNamespace
- ResolvedTable
- ResolvedView
- ResolvedNonPersistentFunc
- ResolvedPersistentFunc
### Why are the changes needed?
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We enable v2 command at 3.3.0 branch by default
`spark.sql.legacy.useV1Command`. However this is a behavior change between v1
and c2 command.
- v1 command:
We resolve logical plan to command at analyzer phase by
`ResolveSessionCatalog`
- v2 commnd:
We resolve logical plan to v2 command at physical phase by
`DataSourceV2Strategy`
Foe cost explain mode, we will call `LogicalPlanStats.stats` using optimized
plan so there is a gap between v1 and v2 command.
Unfortunately, the logical plan of v2 command contains the `LeafNode` which
does not override the `computeStats`. As a result, there is a error running
such sql:
```sql
set spark.sql.ui.explainMode=cost;
show tables;
```
```
java.lang.UnsupportedOperationException:
at
org.apache.spark.sql.catalyst.plans.logical.LeafNode.computeStats(LogicalPlan.scala:171)
at
org.apache.spark.sql.catalyst.plans.logical.LeafNode.computeStats$(LogicalPlan.scala:171)
at
org.apache.spark.sql.catalyst.analysis.ResolvedNamespace.computeStats(v2ResolutionPlans.scala:155)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.SizeInBytesOnlyStatsPlanVisitor$.default(SizeInBytesOnlyStatsPlanVisitor.scala:55)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.SizeInBytesOnlyStatsPlanVisitor$.default(SizeInBytesOnlyStatsPlanVisitor.scala:27)
at
org.apache.spark.sql.catalyst.plans.logical.LogicalPlanVisitor.visit(LogicalPlanVisitor.scala:49)
at
org.apache.spark.sql.catalyst.plans.logical.LogicalPlanVisitor.visit$(LogicalPlanVisitor.scala:25)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.SizeInBytesOnlyStatsPlanVisitor$.visit(SizeInBytesOnlyStatsPlanVisitor.scala:27)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.LogicalPlanStats.$anonfun$stats$1(LogicalPlanStats.scala:37)
at scala.Option.getOrElse(Option.scala:189)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.LogicalPlanStats.stats(LogicalPlanStats.scala:33)
at
org.apache.spark.sql.catalyst.plans.logical.statsEstimation.LogicalPlanStats.stats$(LogicalPlanStats.scala:33)
at
org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.stats(LogicalPlan.scala:30)
```
### Does this PR introduce _any_ user-facing change?
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yes, bug fix
### How was this patch tested?
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add test
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