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perf(db): drop 0287's two zero-row scans from the ACCESS EXCLUSIVE hold#6609

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Merged
waleedlatif1 merged 1 commit into from
Aug 12, 2026
+1 −9
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perf(db): drop 0287's two zero-row scans from the ACCESS EXCLUSIVE hold #6609

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10 changes: 1 addition & 9 deletions packages/db/migrations/0287_workflow_blocks_error_enabled.sql
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Original file line numberDiff line numberDiff line change
Expand Up@@ -11,12 +11,4 @@ ALTER TABLE "workflow_blocks" ADD COLUMN "error_enabled" boolean DEFAULT false N
UPDATE "workflow_blocks" AS b
SET "error_enabled" = true
FROM "workflow_edges" AS e
WHERE e."source_block_id" = b."id" AND e."source_handle" = 'error';--> statement-breakpoint
-- The flag also briefly persisted inside `data` on this unmerged branch and never
-- reached production. These move any row a developer created onto the column and
-- leave the value one home, so a block saved before the change stops differing
-- from one saved after it. Both match zero rows on a database that never saw the key.
-- migration-safe: idempotent (re-running sets the same value and removes an already-absent key); the key is written by no released version, so no concurrent writer can reintroduce it.
UPDATE "workflow_blocks" SET "error_enabled" = true WHERE "data" ->> 'errorEnabled' = 'true';--> statement-breakpoint
-- migration-safe: idempotent (re-running removes an already-absent key); the key is written by no released version, so no concurrent writer can reintroduce it.
UPDATE "workflow_blocks" SET "data" = "data" - 'errorEnabled' WHERE "data" ->> 'errorEnabled' IS NOT NULL;
WHERE e."source_block_id" = b."id" AND e."source_handle" = 'error';
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