From a179a45ac39a1cf87c611c56fe80c8648aed639a Mon Sep 17 00:00:00 2001
From: 648540858 <648540858@qq.com>
Date: 星期五, 21 一月 2022 18:41:41 +0800
Subject: [PATCH] 优化通道选择是通道的查询
---
src/main/java/com/genersoft/iot/vmp/storager/dao/PlatformCatalogMapper.java | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/src/main/java/com/genersoft/iot/vmp/storager/dao/PlatformCatalogMapper.java b/src/main/java/com/genersoft/iot/vmp/storager/dao/PlatformCatalogMapper.java
index 03c66d4..59ecdbc 100644
--- a/src/main/java/com/genersoft/iot/vmp/storager/dao/PlatformCatalogMapper.java
+++ b/src/main/java/com/genersoft/iot/vmp/storager/dao/PlatformCatalogMapper.java
@@ -24,7 +24,9 @@
@Delete("DELETE FROM platform_catalog WHERE platformId=#{platformId}")
int delByPlatformId(String platformId);
- @Select("SELECT *, (SELECT COUNT(1) from platform_catalog where parentId = pc.id AND platformId=#{platformId}) as childrenCount FROM platform_catalog pc WHERE parentId=#{parentId} AND platformId=#{platformId}")
+ @Select("SELECT pc.*, count(pc2.id) as childrenCount FROM platform_catalog pc " +
+ "left join platform_catalog pc2 on pc.id = pc2.parentId " +
+ "WHERE pc.parentId=#{parentId} AND pc.platformId=#{platformId} group by pc.id")
List<PlatformCatalog> selectByParentId(String platformId, String parentId);
@Select("SELECT *, (SELECT COUNT(1) from platform_catalog where parentId = pc.id) as childrenCount FROM platform_catalog pc WHERE pc.id=#{id}")
--
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