[SPARK-56204][SQL] Strip Alias wrappers from inline table row expressions in parser

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala

@@ -2725,8 +2725,14 @@ class AstBuilder extends DataTypeAstBuilder
         // inline table comes in two styles:
         // style 1: values (1), (2), (3)  -- multiple columns are supported
         // style 2: values 1, 2, 3  -- only a single column is supported here
-        case struct: CreateNamedStruct => struct.valExprs // style 1
-        case child => Seq(child)                          // style 2
+        // Strip Alias wrappers from row values — CreateStruct.apply preserves them for
+        // expressions like `(1 AS id, 'a' AS name)`, but they are redundant here since
+        // column names are determined by the table alias or generated defaults.
+        case struct: CreateNamedStruct => struct.valExprs.map {
+          case a: Alias => a.child
+          case other => other
+        } // style 1
+        case child => Seq(child) // style 2
       }
     }
 

sql/core/src/test/resources/sql-tests/analyzer-results/inline-table.sql.out

@@ -256,3 +256,24 @@ select count(distinct ct) from values now(), now(), now() as data(ct)
 select count(distinct ct) from values current_timestamp(), current_timestamp() as data(ct)
 -- !query analysis
 [Analyzer test output redacted due to nondeterminism]
+
+
+-- !query
+select a from (values (1 as id, current_timestamp() as ts), (2 as id, current_timestamp() as ts)) as t(a, b)
+-- !query analysis
+[Analyzer test output redacted due to nondeterminism]
+
+
+-- !query
+select * from values (1 as id, 'a' as name), (2 as id, 'b' as name) as t(a, b)
+-- !query analysis
+Project [a#x, b#x]
++- SubqueryAlias t
+   +- LocalRelation [a#x, b#x]
+
+
+-- !query
+select * from values (1 as a, 2 as b)
+-- !query analysis
+Project [col1#x, col2#x]
++- LocalRelation [col1#x, col2#x]

sql/core/src/test/resources/sql-tests/inputs/inline-table.sql

@@ -66,3 +66,12 @@ select count(distinct ct) from values now(), now(), now() as data(ct);
 
 -- current_timestamp() should be kept as tempResolved inline expression.
 select count(distinct ct) from values current_timestamp(), current_timestamp() as data(ct);
+
+-- aliased expressions in multi-column rows with current_timestamp (non-foldable)
+select a from (values (1 as id, current_timestamp() as ts), (2 as id, current_timestamp() as ts)) as t(a, b);
+
+-- aliased expressions in multi-column rows
+select * from values (1 as id, 'a' as name), (2 as id, 'b' as name) as t(a, b);
+
+-- aliased expressions without table alias
+select * from values (1 as a, 2 as b);

sql/core/src/test/resources/sql-tests/results/inline-table.sql.out

@@ -287,3 +287,29 @@ select count(distinct ct) from values current_timestamp(), current_timestamp() a
 struct<count(DISTINCT ct):bigint>
 -- !query output
 1
+
+
+-- !query
+select a from (values (1 as id, current_timestamp() as ts), (2 as id, current_timestamp() as ts)) as t(a, b)
+-- !query schema
+struct<a:int>
+-- !query output
+1
+2
+
+
+-- !query
+select * from values (1 as id, 'a' as name), (2 as id, 'b' as name) as t(a, b)
+-- !query schema
+struct<a:int,b:string>
+-- !query output
+1	a
+2	b
+
+
+-- !query
+select * from values (1 as a, 2 as b)
+-- !query schema
+struct<col1:int,col2:int>
+-- !query output
+1	2