[英]Unable to make batch insert into Oracle DB using MyBatis
我尝试使用MyBatis(与Spring集成)在Oracle数据库的表中进行批量插入。
它是mapper界面中方法的定义:
public void savePayments(@Param("payments") List<MassPaymentItem> payments);
这是MyBatis XML映射器代码:
<insert id="savePayments" parameterType="MassPaymentFileItem" useGeneratedKeys="false">
INSERT INTO mass_payments
(payment_id, file_id, msisdn, amount, status)
<foreach collection="payments" item="payment" index="index" separator=" UNION ALL ">
SELECT SEQ_MASS_PAYMENT.nextval, #{payment.fileId}, #{payment.msisdn}, #{payment.amount}, 0 FROM DUAL
</foreach>
</insert>
执行此操作时,我收到MyBatisSystemException,消息为“嵌套异常为org.apache.ibatis.builder.BuilderException:内联参数映射格式不正确。应为:#{propName,attr1 = val1,attr2 = val2}”
怎么了? 如何解决?
我在这里找到解决方案
<insert id="savePayments">
INSERT ALL
<foreach collection="payments" item="payment">
INTO
mass_payments_t (payment_id, file_id, msisdn, amount)
VALUES
(seq_mass_payment.nextval, #{payment.fileId, javaType=Integer, jdbcType=NUMERIC}, #{payment.msisdn, javaType=String, jdbcType=VARCHAR}, #{payment.amount, javaType=BigDecimal, jdbcType=NUMERIC})
</foreach>
SELECT * FROM dual
</insert>
我发现第一个答案对我不起作用,然后我找到了另一个解决方案,如下所示:
<insert id="savePayments" parameterType="java.util.List" useGeneratedKeys="true">
<selectKey resultType="java.lang.Integer" keyProperty="payment_id"
order="BEFORE">
SELECT SEQ_MASS_PAYMENT.nextval as payment_id FROM DUAL
</selectKey>
INSERT INTO mass_payments
(payment_id, file_id, msisdn, amount, status)
select SEQ_MASS_PAYMENT.nextval, A.* from (
<foreach collection="payments" item="payment" index="index" separator="UNION ALL">
SELECT
#{payment.fileId} as file_id,
#{payment.msisdn} as msisdn,
#{payment.amount} as amount,
0 as status
FROM DUAL
</foreach> ) A
</insert>
请仔细查看您的select语句。 如果需要列名或函数,则可以传递参数。 您应该将其更改为类似(注意from
的位置:
<foreach collection="payments" item="payment" index="index" separator=" UNION ALL ">
(SELECT SEQ_MASS_PAYMENT.nextval from DUAL), #{payment.fileId}, #{payment.msisdn}, #{payment.amount}, 0
</foreach>
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