postgres/bridge.sql

{{- /* bridge.sql — DROP legacy bare view (migration guard); CREATE _act and _hst.
     All history tables now have universal columns (DESIGN-012), so bridge views
     always use the same SCD2-style projection regardless of history mode. */ -}}
DROP VIEW IF EXISTS "{{ .BridgeSchema }}"."{{ .BridgeTable }}";
DROP VIEW IF EXISTS "{{ .BridgeSchema }}"."{{ .BridgeTable }}_act";
DROP VIEW IF EXISTS "{{ .BridgeSchema }}"."{{ .BridgeTable }}_hst";

CREATE VIEW "{{ .BridgeSchema }}"."{{ .BridgeTable }}_act" AS
SELECT
{{- $first := true }}
{{- range $i, $col := .BridgeCols }}
{{- if $col.Include }}
{{- if $first }}
    {{ $col.ProjectionExpr }}{{ if $col.HasAlias }} AS {{ $col.TargetName }}{{ end }}
{{- $first = false }}
{{- else }}
    ,{{ $col.ProjectionExpr }}{{ if $col.HasAlias }} AS {{ $col.TargetName }}{{ end }}
{{- end }}
{{- end }}
{{- end }}
    ,amf_run_id
    ,amf_valid_from
    ,amf_updated_at
FROM "{{ .HistorySchema }}"."{{ .HistoryTable }}"
WHERE amf_valid_to IS NULL;

CREATE VIEW "{{ .BridgeSchema }}"."{{ .BridgeTable }}_hst" AS
SELECT
{{- $first2 := true }}
{{- range $i, $col := .BridgeCols }}
{{- if $col.Include }}
{{- if $first2 }}
    {{ $col.ProjectionExpr }}{{ if $col.HasAlias }} AS {{ $col.TargetName }}{{ end }}
{{- $first2 = false }}
{{- else }}
    ,{{ $col.ProjectionExpr }}{{ if $col.HasAlias }} AS {{ $col.TargetName }}{{ end }}
{{- end }}
{{- end }}
{{- end }}
    ,amf_run_id
    ,amf_valid_from
    ,amf_valid_to
    ,amf_updated_at
FROM "{{ .HistorySchema }}"."{{ .HistoryTable }}"