Method getCharset

core/src/main/java/org/apache/calcite/sql/SqlUtil.java:1046–1055

Returns the Java-level Charset based on given SQL-level name. @param charsetName Sql charset name, must not be null. @return charset, or default charset if charsetName is null. @throws UnsupportedCharsetException If no support for the named charset is available in this instance of the J

(String charsetName)

   *     is available in this instance of the Java virtual machine
   */
  public static Charset getCharset(String charsetName) {
    String javaCharsetName =
        translateCharacterSetName(
            requireNonNull(charsetName, "charsetName")
                .toUpperCase(Locale.ROOT));
    if (javaCharsetName == null) {
      throw new UnsupportedCharsetException(charsetName);
    }
    return Charset.forName(javaCharsetName);
  }

  /**
   * Validate if value can be decoded by given charset.