执行日志提示值转换规则异常“ERROR. Token's value : , token's type : EOF”

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.is