OpenGauss兼容

[SweetWuXiaoMei]

我现在要开发兼容OpenGauss的存储，发现InstanceConfigRepository这个有sql是写死的。
能否将findInstanceIdsByNamespaceAndInstanceAppId方法里的`去掉

目测没问题

[nobodyiam]

可以去掉测试下，不过之前开发 H2、PostgreSQL 支持都没有反馈这个问题，` 这个符号在 OpenGauss 中有特殊含义吗？

[SweetWuXiaoMei]

能否提供一下Postgresql的sql脚本

[nobodyiam]

#4782

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