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 建立於 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';

貢獻者指南

技術棧
typescriptpostgresqlgraphql
領域
backenddatabase
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
blocked
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
PostgreSQL basicsHasura console usageUnderstanding of database views
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
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.