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/text.go:186

}

func (c TextCodec) DecodeDatabaseSQLValue(m *Map, oid uint32, format int16, src []byte) (driver.Value, error) {
	return c.DecodeValue(m, oid, format, src)
}

func (c TextCodec) DecodeValue(m *Map, oid uint32, format int16, src []byte) (any, error) {
	if src == nil {
		return nil, nil
	}

	return string(src), nil
}

type scanPlanTextAnyToString struct{}

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

	p := (dst).(*string)
	*p = string(src)

	return nil
}

type scanPlanAnyToNewByteSlice struct{}

func (scanPlanAnyToNewByteSlice) Scan(src []byte, dst any) error {
	p := (dst).(*[]byte)
	if src == nil {
		*p = nil
	} else {
		*p = make([]byte, len(src))
		copy(*p, src)
	}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/text.go:186 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/7127d7e5fe476fbe.json. Report an issue: GitHub.