Method iterObject

postgres/parser/json/encoded.go:269–295

iterObject iterates through all the keys and values of an encoded object without requiring decoding of all of them.

()

// iterObject iterates through all the keys and values of an encoded object
// without requiring decoding of all of them.
func (j *jsonEncoded) iterObject() (encodedObjectIterator, error) {
	if j.typ != ObjectJSONType {
		panic("can only iterate through the object values of an object")
	}

	curKeyIdx := containerHeaderLen + j.containerLen*jEntryLen*2
	curValueIdx := curKeyIdx

	// We have to seek to the start of the value data.
	for i := 0; i < j.containerLen; i++ {
		entry, err := getJEntryAt(j.value, containerHeaderLen+i*jEntryLen, curValueIdx-curKeyIdx)
		if err != nil {
			return encodedObjectIterator{}, err
		}
		curValueIdx += int(entry.length)
	}

	return encodedObjectIterator{
		curKeyIdx:   0,
		keyOffset:   curKeyIdx,
		curValueIdx: 0,
		valueOffset: curValueIdx,
		len:         j.containerLen,
		idx:         0,
		data:        j.value,
	}, nil
}

func (j *jsonEncoded) StripNulls() (JSON, bool, error) {
	dec, err := j.shallowDecode()