code: @Override
  	public JavaType getJavaType(final JDBCType jdbcType, final String jdbcTypeName) {
  		if (JDBCType.OTHER.equals(jdbcType)) {
  			if ("json".equalsIgnoreCase(jdbcTypeName) || "jsonb".equalsIgnoreCase(jdbcTypeName)) {
  				// JSON型の場合、文字列として扱う
  				return super.getJavaType(JDBCType.NVARCHAR, jdbcTypeName);
  			}
  		}
  		return super.getJavaType(jdbcType, jdbcTypeName);
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.dialect.AbstractDialect#getJavaType(java.sql.JDBCType, java.lang.String)