[英]HQL cannot query JSON data
這是一個 NativeSql 工作正常: session.createSQLQuery(select json_length(fav_goods) from customer where id=1).uniqueResult()
但是,如果我像下面這樣將其更改為 HQL,它會很好地引發錯誤session.createQuery(select json_length(favGoods) from CustomerEntity where id=1).uniqueResult()
錯誤
Caused by: org.hibernate.QueryException: No data type for node: org.hibernate.hql.internal.ast.tree.MethodNode
\-[METHOD_CALL] MethodNode: '('
+-[METHOD_NAME] IdentNode: 'json_length' {originalText=json_length}
\-[EXPR_LIST] SqlNode: 'exprList'
\-[DOT] DotNode: 'customeren0_.fav_goods' {propertyName=favGoods,dereferenceType=PRIMITIVE,getPropertyPath=favGoods,path={synthetic-alias}.favGoods,tableAlias=customeren0_,className=cn.phyer.bishe.entity.CustomerEntity,classAlias=null}
+-[IDENT] IdentNode: '{synthetic-alias}' {originalText={synthetic-alias}}
\-[IDENT] IdentNode: 'favGoods' {originalText=favGoods}
[select json_length(favGoods) from cn.phyer.bishe.entity.CustomerEntity where id=?1]
at org.hibernate.QueryException.generateQueryException(QueryException.java:120)
at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:220)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:144)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:113)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:73)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:155)
at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:600)
at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:709)
... 39 more
Caused by: org.hibernate.QueryException: No data type for node: org.hibernate.hql.internal.ast.tree.MethodNode
\-[METHOD_CALL] MethodNode: '('
+-[METHOD_NAME] IdentNode: 'json_length' {originalText=json_length}
\-[EXPR_LIST] SqlNode: 'exprList'
\-[DOT] DotNode: 'customeren0_.fav_goods' {propertyName=favGoods,dereferenceType=PRIMITIVE,getPropertyPath=favGoods,path={synthetic-alias}.favGoods,tableAlias=customeren0_,className=cn.phyer.bishe.entity.CustomerEntity,classAlias=null}
+-[IDENT] IdentNode: '{synthetic-alias}' {originalText={synthetic-alias}}
\-[IDENT] IdentNode: 'favGoods' {originalText=favGoods}
在實體 class CustomerEntity
中,字段fav_goods
被命名為favGoods
JPQL(或 HQL)不支持 JSON 函數。
請在此處找到所有支持的功能:
您必須堅持使用 SQL。
我遇到了類似的問題,我不得不使用JSON_EXTRACT
mysql function。
MySQL5Dialect
class 以在 ZF8CB4B31358FA17FA37CFAE6C2A0 中注冊 SQL Function。public class CustomMySQLDialect extends MySQL5Dialect {
public CustomMySQLDialect(){
super();
registerFunction(
"JSON_EXTRACT",
new StandardSQLFunction(
"JSON_EXTRACT",
StandardBasicTypes.STRING
)
);
}
}
<property name="hibernate.dialect">com.testsigma.specification.CustomMySQLDialect</property>
CriteriaQuery
(JPQL) 和 SQL Function。Root<EntityType> subRoot = criteriaBuilder.from(Entity.class);
subQuery.select(builder.function("JSON_EXTRACT", String.class, subRoot.get("jsonData"), builder.literal("$.\"jsonPathField\"")));
query1.where(root.get("jsonKey").in(subQuery));
取自https://vladmihalcea.com/hibernate-sql-function-jpql-criteria-api-query/
從 Hibernate 5.2.3.Final 開始工作,Spring 數據 JPA 2.1.9.RELEASE
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