diff --git a/common/src/main/java/org/opensearch/sql/common/utils/StringUtils.java b/common/src/main/java/org/opensearch/sql/common/utils/StringUtils.java
index 07c09c73c4..c81f56ef63 100644
--- a/common/src/main/java/org/opensearch/sql/common/utils/StringUtils.java
+++ b/common/src/main/java/org/opensearch/sql/common/utils/StringUtils.java
@@ -3,7 +3,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-
 package org.opensearch.sql.common.utils;
 
 import com.google.common.base.Strings;
@@ -13,6 +12,7 @@
 public class StringUtils {
   /**
    * Unquote any string with mark specified.
+   *
    * @param text string
    * @param mark quotation mark
    * @return An unquoted string whose outer pair of (single/double/back-tick) quotes have been
@@ -26,11 +26,10 @@ public static String unquote(String text, String mark) {
   }
 
   /**
-   * Unquote Identifier which has " or ' or ` as mark.
-   * Strings quoted by ' or " with two of these quotes appearing next to each other in the quote
-   * acts as an escape
-   * Example: 'Test''s' will result in 'Test's', similar with those single quotes being replaced
-   * with double.
+   * Unquote Identifier which has " or ' or ` as mark. Strings quoted by ' or " with two of these
+   * quotes appearing next to each other in the quote acts as an escape Example: 'Test''s' will
+   * result in 'Test's', similar with those single quotes being replaced with double.
+   *
    * @param text string
    * @return An unquoted string whose outer pair of (single/double/back-tick) quotes have been
    *     removed
@@ -45,10 +44,7 @@ public static String unquoteText(String text) {
     char firstChar = text.charAt(0);
     char lastChar = text.charAt(text.length() - 1);
 
-    if (firstChar == lastChar
-            && (firstChar == '\''
-            || firstChar == '"'
-            || firstChar == '`')) {
+    if (firstChar == lastChar && (firstChar == '\'' || firstChar == '"' || firstChar == '`')) {
       enclosingQuote = firstChar;
     } else {
       return text;
@@ -67,8 +63,7 @@ public static String unquoteText(String text) {
     for (int chIndex = 1; chIndex < text.length() - 1; chIndex++) {
       currentChar = text.charAt(chIndex);
       nextChar = text.charAt(chIndex + 1);
-      if (currentChar == enclosingQuote
-              && nextChar == currentChar) {
+      if (currentChar == enclosingQuote && nextChar == currentChar) {
         chIndex++;
       }
       textSB.append(currentChar);
@@ -79,9 +74,9 @@ public static String unquoteText(String text) {
 
   /**
    * Unquote Identifier which has ` as mark.
+   *
    * @param identifier identifier that possibly enclosed by double quotes or back ticks
-   * @return An unquoted string whose outer pair of (double/back-tick) quotes have been
-   *     removed
+   * @return An unquoted string whose outer pair of (double/back-tick) quotes have been removed
    */
   public static String unquoteIdentifier(String identifier) {
     if (isQuoted(identifier, "`")) {
@@ -92,16 +87,15 @@ public static String unquoteIdentifier(String identifier) {
   }
 
   /**
-   * Returns a formatted string using the specified format string and
-   * arguments, as well as the {@link Locale#ROOT} locale.
+   * Returns a formatted string using the specified format string and arguments, as well as the
+   * {@link Locale#ROOT} locale.
    *
    * @param format format string
-   * @param args   arguments referenced by the format specifiers in the format string
+   * @param args arguments referenced by the format specifiers in the format string
    * @return A formatted string
    * @throws IllegalFormatException If a format string contains an illegal syntax, a format
-   *                                specifier that is incompatible with the given arguments,
-   *                                insufficient arguments given the format string, or other
-   *                                illegal conditions.
+   *     specifier that is incompatible with the given arguments, insufficient arguments given the
+   *     format string, or other illegal conditions.
    * @see java.lang.String#format(Locale, String, Object...)
    */
   public static String format(final String format, Object... args) {
@@ -111,4 +105,4 @@ public static String format(final String format, Object... args) {
   private static boolean isQuoted(String text, String mark) {
     return !Strings.isNullOrEmpty(text) && text.startsWith(mark) && text.endsWith(mark);
   }
-}
\ No newline at end of file
+}
diff --git a/core/src/main/java/org/opensearch/sql/expression/operator/arthmetic/MathematicalFunction.java b/core/src/main/java/org/opensearch/sql/expression/operator/arthmetic/MathematicalFunction.java
index 0ba434c26d..22f4b76573 100644
--- a/core/src/main/java/org/opensearch/sql/expression/operator/arthmetic/MathematicalFunction.java
+++ b/core/src/main/java/org/opensearch/sql/expression/operator/arthmetic/MathematicalFunction.java
@@ -416,7 +416,6 @@ private static DefaultFunctionResolver pi() {
   }
 
   /**
-
    * <b>Definition of pow(x, y)/power(x, y) function.</b><br>
    * Calculate the value of x raised to the power of y<br>
    * The supported signature of pow/power function is<br>