Every method of builds, build requests, rollouts, merges and assignments reads and writes the chain alone: the else branches that read the tables, the movers and MoveChain with their tests, chain_moved reads, ChainReads and the flags that switched a kind, the store's assignments mirror (KeepAssignmentPlans needs none of it: it uses only the AssignmentMirrored type, mirrors.go, and AssignmentValues, provisioning.go) and its tick, the move code of the controller's start, and ForTest's chain_moved row. The listed store tests of the move go with their functions; the tests of the readers, requests, assignments and plans that lived beside them stay in chain_store_test.go. Tests that replayed old data migrations over the build, assignment and pin tables are removed with the tables. The static test that no plan is written but through SavePlansMoving now reads the plan's chain path.
Once chain_moved records the kind, a plan is a key of the rollouts bucket under its id and the open batch is the same key in state assembling. A save refuses a copy another save moved since (the plan's own Revision, kept in its value, counts saves) and keeps the merges the record holds, so a copy read before a merge moved cannot lay it back. The merges a batch or walk answers are the record's held field, with the columns the table had; a merge no plan answers stays, flagged, in the record that held it last, or in the record kept for those. A merge moved to a plan is written to the receiving record first and then taken from the giving one; one found in both is read from the one it entered last and repaired at the next cut. Plans and merges are read from a view kept by one watch of the bucket. A bus that does not answer, a lease lost and a key moved are now not-now like the store being away, so a merge whose plan could not be written is held and handed over again, never acknowledged. The start moves release_plan and batched_merge into the bucket, one kind, counted against both tables.
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