From 796b558ddcfc6959279a48c13d1063a1f0c77b1b Mon Sep 17 00:00:00 2001
From: Yuya Ebihara <ebyhry@gmail.com>
Date: Tue, 7 Apr 2026 11:54:15 +0900
Subject: [PATCH] Replace deprecated Type.getTypeParameters usage

---
 .../main/java/io/trino/metadata/SignatureBinder.java | 12 ++++++------
 .../java/io/trino/util/variant/RowVariantWriter.java |  2 +-
 .../main/java/io/trino/util/variant/VariantUtil.java |  4 ++--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/core/trino-main/src/main/java/io/trino/metadata/SignatureBinder.java b/core/trino-main/src/main/java/io/trino/metadata/SignatureBinder.java
index c1b70f4deeae..c19130a9eeb1 100644
--- a/core/trino-main/src/main/java/io/trino/metadata/SignatureBinder.java
+++ b/core/trino-main/src/main/java/io/trino/metadata/SignatureBinder.java
@@ -606,10 +606,10 @@ private boolean canCast(Type fromType, Type toType)
         if (fromType instanceof UnknownType || toType instanceof UnknownType) {
             return true;
         }
-        if (fromType instanceof RowType) {
-            if (toType instanceof RowType) {
-                List<Type> fromTypeParameters = fromType.getTypeParameters();
-                List<Type> toTypeParameters = toType.getTypeParameters();
+        if (fromType instanceof RowType fromRowType) {
+            if (toType instanceof RowType toRowType) {
+                List<Type> fromTypeParameters = fromRowType.getFieldTypes();
+                List<Type> toTypeParameters = toRowType.getFieldTypes();
                 if (fromTypeParameters.size() != toTypeParameters.size()) {
                     return false;
                 }
@@ -626,9 +626,9 @@ private boolean canCast(Type fromType, Type toType)
             }
             return false;
         }
-        if (toType instanceof RowType) {
+        if (toType instanceof RowType toRowType) {
             if (isRecursiveCastToRow(fromType)) {
-                return toType.getTypeParameters().stream()
+                return toRowType.getFieldTypes().stream()
                         .allMatch(toTypeParameter -> canCast(fromType, toTypeParameter));
             }
         }
diff --git a/core/trino-main/src/main/java/io/trino/util/variant/RowVariantWriter.java b/core/trino-main/src/main/java/io/trino/util/variant/RowVariantWriter.java
index 5386cdb574ad..fa974c07585e 100644
--- a/core/trino-main/src/main/java/io/trino/util/variant/RowVariantWriter.java
+++ b/core/trino-main/src/main/java/io/trino/util/variant/RowVariantWriter.java
@@ -64,7 +64,7 @@ final class RowVariantWriter
         ImmutableList.Builder<Optional<VariantWriter>> writersInWriteOrder = ImmutableList.builderWithExpectedSize(fieldCount);
 
         for (int fieldIndex : writeOrder) {
-            Type fieldType = type.getTypeParameters().get(fieldIndex);
+            Type fieldType = type.getFieldTypes().get(fieldIndex);
             fieldNamesInWriteOrder.add(fieldNames.get(fieldIndex));
             fieldTypesInWriteOrder.add(fieldType);
 
diff --git a/core/trino-main/src/main/java/io/trino/util/variant/VariantUtil.java b/core/trino-main/src/main/java/io/trino/util/variant/VariantUtil.java
index 0f65bc3b2024..89c56adc8a42 100644
--- a/core/trino-main/src/main/java/io/trino/util/variant/VariantUtil.java
+++ b/core/trino-main/src/main/java/io/trino/util/variant/VariantUtil.java
@@ -162,7 +162,7 @@ public static boolean canCastToVariant(Type type)
                     canCastToVariant(mapType.getValueType());
         }
         if (type instanceof RowType rowType) {
-            return rowType.getTypeParameters().stream().allMatch(VariantUtil::canCastToVariant);
+            return rowType.getFieldTypes().stream().allMatch(VariantUtil::canCastToVariant);
         }
         return false;
     }
@@ -196,7 +196,7 @@ public static boolean canCastFromVariant(Type type)
             return mapType.getKeyType() instanceof VarcharType && canCastFromVariant(mapType.getValueType());
         }
         if (type instanceof RowType rowType) {
-            return rowType.getTypeParameters().stream().allMatch(VariantUtil::canCastFromVariant);
+            return rowType.getFieldTypes().stream().allMatch(VariantUtil::canCastFromVariant);
         }
         return false;
     }