postgres/append.sql

{{- /* append.sql — insert-only load, skip rows already present (idempotency) */ -}}
{{- /* Also used for dedup_append — semantic distinction is at the agent context level */ -}}
{{- /* Uses ON CONFLICT with the universal UNIQUE(hpk, valid_to) index (ADR-008). */ -}}
INSERT INTO "{{ .HistorySchema }}"."{{ .HistoryTable }}" (
    {{ template "business_col_list" . }}, {{ template "amf_system_cols" . }}
)
SELECT {{ template "business_col_list" . }}, {{ template "amf_system_vals" . }}
FROM   "{{ .StagingSchema }}"."{{ .StagingTable }}" stg
ON CONFLICT (amf_hash_primary_key, amf_valid_to) DO NOTHING