Java JPA reported java.lang.IllegalArgumentException: Validation failed for query for method public abstract ... an abnormal causes and solutions

background

JDK Version: 1.8

Framework: SpringBoot 2.x

ORM: JPA

abnormal

All exception information is not posted, too, the key to this one below

java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.lang.Integer com.ess.fsjs.useWaterPlan.dao.PlanTotalIndicatorsDao.queryMaxPlanYear()!

From this point of view exception information, suggesting relatively pan, just say for verification fails, there are several errors that may occur will this prompt.

Find concrete error method, namely: com.ess.fsjs.useWaterPlan.dao.PlanTotalIndicatorsDao.queryMaxPlanYear (), facie Code:

/ ** 
 * Query has the largest amount of planned targets of the year 
 * @return 
 * / 
@Query (value = "the SELECT max (plan_year) from t_plan_total_indicators" ) 
Integer queryMaxPlanYear ();

A very simple query using native SQL, SQL can be seen that there is no problem. JPA when using native SQL statements, you need nativeQuery = true, so the problem lies here, plus enough.

The revised Code:

/ ** 
 * Query has the largest amount of planned targets of the year 
 * @return 
 * / 
@Query (value = "the SELECT max (plan_year) from t_plan_total_indicators", nativeQuery = to true ) 
Integer queryMaxPlanYear ();