jackc/pgx · error

field %s has empty `%s` tag

Error message

field %s has empty `%s` tag

What it means

Error "field %s has empty `%s` tag" thrown in jackc/pgx.

Source

Thrown at named_args.go:144

		ft := sf.Type
		if ft.Kind() == reflect.Pointer {
			ft = ft.Elem()
		}
		if ft.Kind() == reflect.Struct {
			return "", false, nil
		}
	}

	dbTag, dbTagPresent := sf.Tag.Lookup(structTagKey)
	if dbTagPresent {
		dbTag, _, _ = strings.Cut(dbTag, ",")
	}
	if dbTag == "-" {
		return "", false, nil
	}
	if dbTagPresent {
		if dbTag == "" {
			return "", false, fmt.Errorf("field %s has empty `%s` tag", sf.Name, structTagKey)
		}
		return dbTag, true, nil
	}

	return sf.Name, true, nil
}

type namedArg string

type sqlLexer struct {
	src     string
	start   int
	pos     int
	nested  int // multiline comment nesting level.
	stateFn stateFn
	parts   []any

	nameToOrdinal map[namedArg]int

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at named_args.go:144 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of jackc/pgx@ec1a0befd2 (2026-08-04). Data as JSON: /data/errors/ca02637af00e69e1.json. Report an issue: GitHub.