Function EncodeTSQueryPGBinary

pkg/util/tsearch/encoding.go:210–218

EncodeTSQueryPGBinary encodes a tsquery into a serialized representation. The below comment explains the wire protocol representation. It is taken from this page: https://www.npgsql.org/dev/types.html the tree written in prefix notation: First the number of tokens (a token is an operand or an op

(appendTo []byte, query TSQuery)

//	  For oper: UInt8 oper (1 = not, 2 = and, 3 = or, 4 = phrase).
//	  In case of phrase oper code, an additional UInt16 field is sent (distance value of operator). Default is 1 for <->, otherwise the n value in '<n>'.
func EncodeTSQueryPGBinary(appendTo []byte, query TSQuery) []byte {
	// First, append a uint32 of the number of nodes in the query. We'll come
	// back and fill this in later.
	lengthIdx := len(appendTo)
	appendTo = encoding.EncodeUint32Ascending(appendTo, 0)
	var encoder tsNodeCodec
	appendTo = encoder.encodeTSNodePGBinary(query.root, appendTo)
	return encoding.PutUint32Ascending(appendTo, uint32(encoder.nTokens), lengthIdx)
}

// DecodeTSQueryPGBinary deserializes a serialized TSQuery in pgwire format.
func DecodeTSQueryPGBinary(b []byte) (ret TSQuery, err error) {