jackc/pgx · error

cannot scan NULL into %T

Error message

cannot scan NULL into %T

What it means

Error "cannot scan NULL into %T" thrown in jackc/pgx.

Source

Thrown at pgtype/enum_codec.go:88

		c.membersMap = make(map[string]string)
	}

	if s, found := c.membersMap[string(src)]; found {
		return s
	}

	s := string(src)
	c.membersMap[s] = s
	return s
}

type scanPlanTextAnyToEnumString struct {
	codec *EnumCodec
}

func (plan *scanPlanTextAnyToEnumString) Scan(src []byte, dst any) error {
	if src == nil {
		return fmt.Errorf("cannot scan NULL into %T", dst)
	}

	p := (dst).(*string)
	*p = plan.codec.lookupAndCacheString(src)

	return nil
}

type scanPlanTextAnyToEnumTextScanner struct {
	codec *EnumCodec
}

func (plan *scanPlanTextAnyToEnumTextScanner) Scan(src []byte, dst any) error {
	scanner := (dst).(TextScanner)

	if src == nil {
		return scanner.ScanText(Text{})
	}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/enum_codec.go:88 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/5d3432e00fbb0d8e.json. Report an issue: GitHub.