问题：java.lang.RuntimeException: 转换规则（1564C333)执行失败。原因：kd.bos.ksql.exception.ParserException: parse error. detail message is :

ERROR. Token's value : , token's type : EOF, line 1, column 60

source sql is : 

select top 1 fid as result from T_PUR_TRACE where fnumber =

at kd.isc.iscb.platform.core.vc.ValueConversionRuleFactory.run(ValueConversionRuleFactory.java:64)

at kd.isc.iscb.platform.core.dc.e.DataCopyMapping.convertValue(DataCopyMapping.java:233)

at kd.isc.iscb.platform.core.dc.e.DataCopyMapping.convert(DataCopyMapping.java:212)at

错误原因：SQL脚本中使用了中间变量，但是没有判空处理，需添加如if(eas_fnumber == null) return null;的语句。

解决方法：修改值转换规则的脚本。