no need for matching sidecars

cmd/internal/database/postgres/upgrade.go

@@ -22,7 +22,6 @@ const (
 	postgresUpgradeCmd  = "pg_upgrade"
 	postgresInitDBCmd   = "initdb"
 	postgresVersionFile = "PG_VERSION"
-	oldPostgresBindir   = "/usr/local/bin/pg-old"
 )
 
 var (
@@ -81,6 +80,8 @@ func (db *Postgres) Upgrade() error {
 		return fmt.Errorf("database is newer than postgres binary")
 	}
 
+	oldPostgresBindir := fmt.Sprintf("pg-bin-v%d", pgVersion)
+
 	// Check if old pg_config are present and match pgVersion
 	oldPostgresConfigCmd := path.Join(oldPostgresBindir, postgresConfigCmd)
 	if ok := db.isCommandPresent(oldPostgresConfigCmd); !ok {