将索引缩短为 IX_CE_Offering_Status_WaitlistedAt。
将候补迁移改为可重入:先检查列和索引是否存在,再执行 DDL。 附件中已经成功添加 WaitlistedAt、但索引创建失败的数据库可直接重试,不会报重复列。 运行时和 dotnet ef 连接统一开启 AllowUserVariables;Connector/NET 默认关闭该选项。Connector/NET 官方说明 增加所有 MySQL 索引名不得超过 64 字符的回归测试。
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@@ -1611,7 +1611,7 @@ public sealed class DevelopmentSqliteMigrator(
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ADD COLUMN "WaitlistedAt" TEXT NULL;
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""",
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"""
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CREATE INDEX IF NOT EXISTS "IX_CourseEnrollments_CourseSelectionOfferingId_Status_WaitlistedAt"
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CREATE INDEX IF NOT EXISTS "IX_CE_Offering_Status_WaitlistedAt"
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ON "CourseEnrollments" ("CourseSelectionOfferingId", "Status", "WaitlistedAt");
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"""
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];
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