path

Length of size portion + 12 + 16 x number of vertices

1) When carrying out division, round to the next integer.

2) If the real data length is less than 127, then the length of the size portion is 1 byte, otherwise it is 4 bytes.

3) The number of bytes per character depends on the character set (refer to "E.3.4 Number of Bytes per Character" for details).

polygon

Length of size portion + 36 + 16 x number of vertices

decimal

Length of size portion + 2 + (integer precision / 4 + decimal precision / 4) x 2

numeric

bytea

Length of size portion + real data length

character varying(n), varchar(n)

Length of size portion + number of characters x number of bytes per character

character(n), char(n)

Length of size portion + n x number of bytes per character

text

Length of size portion + number of characters x number of bytes per character