dongjoon-hyun opened a new pull request #30190:
URL: https://github.com/apache/spark/pull/30190
### What changes were proposed in this pull request?
This PR aims to wrap `ArrayBasedMapData` literal representation with
`map(...)`.
### Why are the changes needed?
Literal ArrayBasedMapData has inconsistent string representation from
`LogicalPlan` to `Optimized Logical Plan/Physical Plan`. Also, the
representation at `Optimized Logical Plan` and `Physical Plan` is ambiguous
like `keys: [key1], values: [value1] AS c#0`.
```
scala> spark.version
res0: String = 2.4.7
scala> sql("SELECT map('key1', 'value1') c").explain(true)
== Parsed Logical Plan ==
'Project ['map(key1, value1) AS c#0]
+- OneRowRelation
== Analyzed Logical Plan ==
c: map<string,string>
Project [map(key1, value1) AS c#0]
+- OneRowRelation
== Optimized Logical Plan ==
Project [keys: [key1], values: [value1] AS c#0]
+- OneRowRelation
== Physical Plan ==
*(1) Project [keys: [key1], values: [value1] AS c#0]
+- Scan OneRowRelation[]
```
### Does this PR introduce _any_ user-facing change?
Yes. This changes the query plan's string representation in `explain`
command and UI.
### How was this patch tested?
Pass the CI with the newly added test case.
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