Phase 3 Slice 9 Step E (design §3.E, §9.1). m approved the
downtime window 2026-05-15 ("paliad ist nicht in use heute,
downtime ist egal") so the destructive drops can land.
Drops four superseded columns on paliad.deadline_rules:
is_mandatory → priority='mandatory' | other (Slice 2 mig 083)
is_optional → priority='optional' (Slice 2 mig 083)
condition_flag → condition_expr (Slice 2 mig 084)
condition_rule_id → DEAD (no live rows, Q13 m's approved drop)
Pre-drop snapshot: paliad.deadline_rules_pre_091 (id +
the four columns + snapshotted_at). Lets the down-migration
restore values to existing rows; a follow-up cleanup slice drops
the snapshot table once the rule editor's migration-export flow
has been used to roll any post-drop edits back into version
control.
Hard assertions at end:
- count(priority IS NULL) == 0 (Slice 2 mig 083 must have run).
- count(rule with pre-drop condition_flag but no condition_expr)
== 0 (Slice 2 mig 084 must have populated every row).
Both raise EXCEPTION on violation — fails the migration loudly
before legacy code paths get pulled out from under the unified
calculator.
Audit-reason wrapper set; ALTER TABLE DROP COLUMN doesn't fire
the mig 079 row-level trigger, but the wrapper is the standard
Phase 3 pattern.
Sibling drops deferred — see live-data audit in head ping:
- mig 092 (event_deadlines + trigger_events tables): SKIPPED.
trigger_events has 33 event_types FKs + 77 deadline_rules
FKs; event_deadlines + event_deadline_rule_codes still
consumed by EventDeadlineService.Calculate for the frontend's
"Was kommt nach…" tab (/api/tools/event-deadlines is still
in use post-Slice-3 delegate).
- mig 093 (retire litigation category): SKIPPED. 40 active
deadline_rules still reference litigation-category
proceeding_types (the Pipeline-A INF/REV/CCR/APM/APP/AMD/
ZPO_CIVIL rules; Slice 5 retired them from project-binding,
not from the rule corpus).
Both deferrals are tracked in the head ping; the litigation drop
can land after a focused slice that splits the Pipeline-A rules
off the litigation category onto a fristenrechner-side parent.
The event_deadlines drop needs EventDeadlineService.Calculate
to stop reading the source rows first.
