README.md

A binary format specification of PostgreSQL built-in types

Numeric

smallint - word16 integer - word32 bigint - word64 decimal - TODO numeric - TODO real - float32 double precision - float64 

Monetary

Character

char - word8 text, varchar - text[n] 

Binary

bytea - bytes[n] 

Date/Times

TODO

Boolean

bool - word8(1 for True, 0 for False) 

Enum

text[n]

Geometric

Network Address

Text Search

UUID

XML

JSON

json - text jsonb - word8 - 1 text 

Array

word32 - dimension word32 - 1 if array has NULL, 0 otherwise oid - oid of element type for each dimension: word32 - elements in dimension word32 - lower bound for each element: word32 - elements length bytes[n] - encoded element 

Composite

word32 - number of columns for each column: oid - oid of element word32 - element length bytes[n] - encoded element 

Range

word8 - flags(?) if has lower bound: word32 - length bytes[n] - encoded lower bound as type if has upper bound: word32 - length bytes[n] - encoded upper bound as type 

Oid

oid