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refactor(mapper):优化查询逻辑并处理空列表情况

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- 将 filterExistingRelations 查询中的 if 判断替换为 choose-when 结构
- 在 otherwise 分支中添加空结果集查询，避免空列表时 SQL 异常- 统一 filterValidSourceRelations 查询结构，增强代码一致性
-修正 foreach 标签中 UNION ALL 前后的空格问题，确保 SQL 语法正确- 提升 XML 映射文件的可读性和健壮性
This commit is contained in:
Jerry Yan
2025-09-24 17:50:53 +08:00
parent 94d6b2f443
commit 30805f3e30
1 changed files with 92 additions and 62 deletions
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154
src/main/resources/mapper/SourceMapper.xml
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@@ -17,73 +17,103 @@
</foreach> </foreach>
</insert> </insert>
<select id="filterExistingRelations" resultType="com.ycwl.basic.model.pc.source.entity.MemberSourceEntity"> <select id="filterExistingRelations" resultType="com.ycwl.basic.model.pc.source.entity.MemberSourceEntity">
<if test="list != null and list.size() > 0"> <choose>
SELECT <when test="list != null and list.size() > 0">
r.memberId as memberId, SELECT
r.sourceId as sourceId, r.memberId as memberId,
r.type as type, r.sourceId as sourceId,
r.faceId as faceId, r.type as type,
r.scenicId as scenicId, r.faceId as faceId,
r.isBuy as isBuy, r.scenicId as scenicId,
r.orderId as orderId, r.isBuy as isBuy,
r.isFree as isFree, r.orderId as orderId,
r.id as id r.isFree as isFree,
FROM ( r.id as id
<foreach collection="list" item="item" separator=" UNION ALL "> FROM (
SELECT <foreach collection="list" item="item" separator=" UNION ALL ">
#{item.memberId} as memberId, SELECT
#{item.sourceId} as sourceId, #{item.memberId} as memberId,
#{item.type} as type, #{item.sourceId} as sourceId,
#{item.faceId} as faceId, #{item.type} as type,
#{item.scenicId} as scenicId, #{item.faceId} as faceId,
#{item.isBuy} as isBuy, #{item.scenicId} as scenicId,
#{item.orderId} as orderId, #{item.isBuy} as isBuy,
#{item.isFree} as isFree, #{item.orderId} as orderId,
#{item.id} as id #{item.isFree} as isFree,
</foreach> #{item.id} as id
) r </foreach>
WHERE NOT EXISTS ( ) r
SELECT 1 FROM member_source ms WHERE NOT EXISTS (
WHERE ms.member_id = r.memberId SELECT 1 FROM member_source ms
AND ms.source_id = r.sourceId WHERE ms.member_id = r.memberId
AND ms.type = r.type AND ms.source_id = r.sourceId
AND ms.face_id = r.faceId AND ms.type = r.type
) AND ms.face_id = r.faceId
</if> )
</when>
<otherwise>
SELECT
NULL as memberId,
NULL as sourceId,
NULL as type,
NULL as faceId,
NULL as scenicId,
NULL as isBuy,
NULL as orderId,
NULL as isFree,
NULL as id
WHERE 1 = 0
</otherwise>
</choose>
</select> </select>
<select id="sourceExists" resultType="boolean"> <select id="sourceExists" resultType="boolean">
SELECT COUNT(1) > 0 FROM source WHERE id = #{sourceId} SELECT COUNT(1) > 0 FROM source WHERE id = #{sourceId}
</select> </select>
<select id="filterValidSourceRelations" resultType="com.ycwl.basic.model.pc.source.entity.MemberSourceEntity"> <select id="filterValidSourceRelations" resultType="com.ycwl.basic.model.pc.source.entity.MemberSourceEntity">
<if test="list != null and list.size() > 0"> <choose>
SELECT <when test="list != null and list.size() > 0">
r.memberId as memberId, SELECT
r.sourceId as sourceId, r.memberId as memberId,
r.type as type, r.sourceId as sourceId,
r.faceId as faceId, r.type as type,
r.scenicId as scenicId, r.faceId as faceId,
r.isBuy as isBuy, r.scenicId as scenicId,
r.orderId as orderId, r.isBuy as isBuy,
r.isFree as isFree, r.orderId as orderId,
r.id as id r.isFree as isFree,
FROM ( r.id as id
<foreach collection="list" item="item" separator="UNION ALL "> FROM (
SELECT <foreach collection="list" item="item" separator=" UNION ALL ">
#{item.memberId} as memberId, SELECT
#{item.sourceId} as sourceId, #{item.memberId} as memberId,
#{item.type} as type, #{item.sourceId} as sourceId,
#{item.faceId} as faceId, #{item.type} as type,
#{item.scenicId} as scenicId, #{item.faceId} as faceId,
#{item.isBuy} as isBuy, #{item.scenicId} as scenicId,
#{item.orderId} as orderId, #{item.isBuy} as isBuy,
#{item.isFree} as isFree, #{item.orderId} as orderId,
#{item.id} as id #{item.isFree} as isFree,
</foreach> #{item.id} as id
) r </foreach>
WHERE EXISTS ( ) r
SELECT 1 FROM source s WHERE s.id = r.sourceId WHERE EXISTS (
) SELECT 1 FROM source s WHERE s.id = r.sourceId
</if> )
</when>
<otherwise>
SELECT
NULL as memberId,
NULL as sourceId,
NULL as type,
NULL as faceId,
NULL as scenicId,
NULL as isBuy,
NULL as orderId,
NULL as isFree,
NULL as id
WHERE 1 = 0
</otherwise>
</choose>
</select> </select>
<insert id="addSourceWatermark"> <insert id="addSourceWatermark">
insert source_watermark(source_id, face_id, watermark_type, watermark_url) insert source_watermark(source_id, face_id, watermark_type, watermark_url)