diff --git a/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterCatalog.java b/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterCatalog.java
index a67b5f892420..8e5bc3e40f47 100644
--- a/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterCatalog.java
+++ b/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterCatalog.java
@@ -101,11 +101,6 @@ public void execute(CalcitePrepare.Context context) {
 
   @Override
   public void unparseAlterOperation(SqlWriter writer, int left, int right) {
-    unparse(writer, left, right);
-  }
-
-  @Override
-  public void unparse(SqlWriter writer, int left, int right) {
     writer.keyword("ALTER");
     writer.keyword("CATALOG");
     name.unparse(writer, left, right);
diff --git a/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterTable.java b/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterTable.java
index 4c4fa4f8f1de..32a86864bcb6 100644
--- a/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterTable.java
+++ b/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/parser/SqlAlterTable.java
@@ -154,11 +154,6 @@ private void validateNonOverlappingProps(
 
   @Override
   public void unparseAlterOperation(SqlWriter writer, int left, int right) {
-    unparse(writer, left, right);
-  }
-
-  @Override
-  public void unparse(SqlWriter writer, int left, int right) {
     writer.keyword("ALTER");
     writer.keyword("TABLE");
     name.unparse(writer, left, right);