unified-storage: make sql backend update key_path for kv store (#114879)

* unified-storage: update resource_history_update_rv.sql to populate key_path in resource_history

pkg/storage/unified/sql/queries.go

@@ -369,13 +369,30 @@ func (r sqlResourceBlobQueryRequest) Validate() error {
 
 type sqlResourceUpdateRVRequest struct {
 	sqltemplate.SQLTemplate
-	GUIDToRV map[string]int64
+	GUIDToRV          map[string]int64
+	GUIDToSnowflakeRV map[string]int64
 }
 
 func (r sqlResourceUpdateRVRequest) Validate() error {
 	return nil // TODO
 }
 
+func (r sqlResourceUpdateRVRequest) SlashFunc() string {
+	if r.DialectName() == "postgres" {
+		return "CHR(47)"
+	}
+
+	return "CHAR(47)"
+}
+
+func (r sqlResourceUpdateRVRequest) TildeFunc() string {
+	if r.DialectName() == "postgres" {
+		return "CHR(126)"
+	}
+
+	return "CHAR(126)"
+}
+
 // resource_version table requests.
 type resourceVersionResponse struct {
 	ResourceVersion int64