diff --git a/core/src/main/java/org/apache/calcite/sql/SqlDialect.java b/core/src/main/java/org/apache/calcite/sql/SqlDialect.java
index 81f783db978c..cf7a100bf712 100644
--- a/core/src/main/java/org/apache/calcite/sql/SqlDialect.java
+++ b/core/src/main/java/org/apache/calcite/sql/SqlDialect.java
@@ -478,6 +478,11 @@ public void unparseDateTimeLiteral(SqlWriter writer,
     writer.literal(literal.toString());
   }
 
+  public void unparseNumericLiteral(SqlWriter writer,
+      String value, int leftPrec, int rightPrec) {
+    writer.literal(value);
+  }
+
   public void unparseSqlDatetimeArithmetic(SqlWriter writer,
       SqlCall call, SqlKind sqlKind, int leftPrec, int rightPrec) {
     final SqlWriter.Frame frame = writer.startList("(", ")");
diff --git a/core/src/main/java/org/apache/calcite/sql/SqlNumericLiteral.java b/core/src/main/java/org/apache/calcite/sql/SqlNumericLiteral.java
index bcb5064a183b..29572c136079 100644
--- a/core/src/main/java/org/apache/calcite/sql/SqlNumericLiteral.java
+++ b/core/src/main/java/org/apache/calcite/sql/SqlNumericLiteral.java
@@ -84,7 +84,7 @@ public boolean isExact() {
       SqlWriter writer,
       int leftPrec,
       int rightPrec) {
-    writer.literal(toValue());
+    writer.getDialect().unparseNumericLiteral(writer, toValue(), leftPrec, rightPrec);
   }
 
   @Override public String toValue() {