hasura/graphql-engine

attempting to add a default value to a column used by a view results in an error

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#3,224 创建于 2019年10月24日

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描述

Via the console, attempting to add a default value to a column which is used by a postgres view results in the following error:

Modifying Column Failed:
postgres-error: cannot alter type of a column used by a view or rule

Note, we are not changing the column type, we are simply adding a default value. Performing the same operation directly on the database works as expected.

i.e.

alter table "UserProfilePermissions" alter column "emailAddresses" set default 'false';

贡献者指南

技术栈
typescriptpostgresqlgraphql
领域
backenddatabase
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
blocked
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
PostgreSQL basicsHasura console usageUnderstanding of database views
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
Investigate the Hasura console's migration logic for altering column defaults. The error occurs because the console's SQL command attempts to alter the column type even when only adding a default value. Compare with the direct SQL that works. Look at the relevant code in the Hasura graphql engine repository, specifically in the console's migration or schema management modules.