feature (psql): psql backend improvements

server/plugin/plg_backend_psql/index_cat.go

@@ -63,7 +63,11 @@ func (this PSQL) Cat(path string) (io.ReadCloser, error) {
 					forms[i].Opts = link.values
 				}
 			}
+		} else if values, err := _findEnumValues(this.ctx, this.db, columns[i]); err == nil && len(values) > 0 {
+			forms[i].Type = "select"
+			forms[i].Opts = values
 		}
+
 	}
 	b, err := Form{Elmnts: forms}.MarshalJSON()
 	if err != nil {
@@ -117,3 +121,28 @@ func _findRelation(ctx context.Context, db *sql.DB, el Column) (LocationColumn,
 	}
 	return l, nil
 }
+
+func _findEnumValues(ctx context.Context, db *sql.DB, el Column) ([]string, error) {
+	var count int
+	if err := db.QueryRowContext(ctx, `
+		SELECT COUNT(*)
+			FROM pg_type
+			WHERE typname = $1 AND typtype = 'e'
+	`, el.Type).Scan(&count); err != nil || count == 0 {
+		return nil, err
+	}
+	rows, err := db.QueryContext(ctx, `SELECT unnest(enum_range(NULL::`+el.Type+`))`)
+	if err != nil {
+		return nil, err
+	}
+	values := []string{}
+	for rows.Next() {
+		var value string
+		if err := rows.Scan(&value); err != nil {
+			return nil, err
+		}
+		values = append(values, value)
+	}
+	rows.Close()
+	return values, nil
+}

server/plugin/plg_backend_psql/utils.go

@@ -87,6 +87,9 @@ func _calculateScore(column Column) int {
 	scoreName := 1
 	if slices.Contains(column.Constraint, "PRIMARY KEY") {
 		scoreType = 3
+		if column.Type == "uuid" {
+			scoreType = 1
+		}
 	} else if slices.Contains(column.Constraint, "UNIQUE") {
 		scoreType = 2
 	}