tests work on master

Author: richardc-db

kernel/kernel-api/src/main/java/io/delta/kernel/internal/TableFeatures.java

@@ -51,7 +51,7 @@ public static void validateReadSupportedTable(
                             break;
                         case "deletionVectors": // fall through
                         case "timestampNtz": // fall through
-                        case "variantType-dev": // fall through
+                        case "variantType-preview": // fall through
                         case "vacuumProtocolCheck": // fall through
                         case "v2Checkpoint":
                             break;

kernel/kernel-defaults/src/main/java/io/delta/kernel/defaults/internal/expressions/DefaultExpressionEvaluator.java

@@ -665,22 +665,12 @@ private ColumnVector variantCoalesceImpl(ColumnVector inputVec, DataType dt) {
                         mapType.getValueType()
                     );
                 }
-                ColumnVector keyVec = mapVec.getKeyVector();
-                if (mapType.getKeyType() instanceof ArrayType ||
-                    mapType.getKeyType() instanceof StructType ||
-                    mapType.getKeyType() instanceof MapType ||
-                    mapType.getKeyType() instanceof VariantType) {
-                    keyVec = variantCoalesceImpl(
-                        mapVec.getKeyVector(),
-                        mapType.getKeyType()
-                    );
-                }
                 return new DefaultMapVector(
                     mapVec.getSize(),
                     mapType,
                     mapVec.getNullability(),
                     mapVec.getOffsets(),
-                    keyVec,
+                    mapVec.getKeyVector(),
                     valueVec
                 );
             }

kernel/kernel-defaults/src/test/scala/io/delta/kernel/defaults/ScanSuite.scala

@@ -1670,8 +1670,7 @@ class ScanSuite extends AnyFunSuite with TestUtils with ExpressionTestUtils with
         map('v', parse_json(cast(id as string)))
       ) as array_map_v""",
       "map('test', parse_json(cast(id as string))) as map_value_v",
-      "map('test', named_struct('v', parse_json(cast(id as string)))) as map_struct_v",
-      "map(parse_json(cast(id as string)), parse_json(cast(id as string))) as map_key_v"
+      "map('test', named_struct('v', parse_json(cast(id as string)))) as map_struct_v"
     )
   }