docs(capability-matrix): add specs for database.mutate.insert and upsert - #130
docs(capability-matrix): add specs for database.mutate.insert and upsert#130grdsdev wants to merge 2 commits into
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Documents the Prefer: missing null-vs-DEFAULT choice that SDK-1613 adds to supabase-swift, plus the conflict target and resolution behaviour the recent Swift upsert fixes established. Refs SDK-1613
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WalkthroughThis change adds capability specifications for database inserts and upserts. The insert specification defines payload shapes, heterogeneous batches, empty collections, missing-column defaults, returned representations, preference composition, and errors. The upsert specification extends insert behavior with conflict targets, duplicate resolution modes, conflict-specific defaults, preference composition, and additional errors. Merge Risk: ⚪ Minimal · up to This PR adds specifications for database mutation capabilities without introducing runtime or product behavior changes; no actionable merge-blocking risk remains beyond normal checks and review. Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
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In `@packages/capability-matrix/specs/database/mutate/upsert.md`:
- Around line 23-24: Update the upsert specification text around the
target-column behavior to state that on_conflict applies to every inserted row,
including rows omitting the target column; with missing=default, describe
conflict handling using the resolved database-generated value rather than
payload key presence, while preserving that a batch may mix outcomes.
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packages/capability-matrix/specs/database/mutate/insert.mdpackages/capability-matrix/specs/database/mutate/upsert.md
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…tting the target The target applies to every inserted row, not only to rows whose payload carries the target column. Describe the per-row outcome in terms of the value the column resolves to — the database-generated default under missing=default — rather than payload key presence.
QuintinWillison
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A little dense to review with human eyes, so approving on the basis that it looks viable on a quick read and also that having something in place is probably better than having nothing in place.
I would be intrigued to know which SDK codebases currently conform to this spec word for word. Once this PR has merged, I'll point Claude at this and my incubating Go SDK repo to see where there might be lack of alignment.
I did chuck this at Claude and it spotted something...
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🤖 Claude's analysis...
In insert.md, the heterogeneous-batch paragraph says that without columns "PostgREST derives the column list from the first row alone and silently drops keys that only later rows carry". PostgREST actually rejects that request outright: payload parsing takes the first object's keys as canonical and fails with "All object keys must match" (PGRST102, HTTP 400) when any later row diverges - see Payload.hs lines 50-60 and payloadAttributes. supabase-go also has an integration test pinning the 400 against the current Supabase CLI stack (https://github.com/supabase/supabase-go/blob/80564f0c00230173c1ec85b087c80a28f2f07992/postgrest/integrationtest/mutations_test.go#L230).
So the failure the union prevents is a loud rejection rather than silent data loss. Two questions before we implement the MUST in Go:
- Should the rationale sentence be corrected? The requirement itself can stand - the union is what makes heterogeneous batches expressible at all, and js, py and flutter already ship it - but the motivation changes from "prevents silent data loss" to "makes ragged batches work".
- Is the MUST intended to apply to every collection insert (supabase-js sends the union for every non-empty array, uniform or not) or only to heterogeneous ones, as the "Where the SDK's row type omits absent values" framing suggests? We would prefer to match the JS always-on behaviour for wire consistency, but the spec text reads as conditional.
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Add specs for both
database.mutate.insertanddatabase.mutate.upsert.