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Wiki / Protocol Messages

AuthenticationOk

AuthenticationOk is a backend protocol message. Identifies the message as an authentication request.

Reading PG 18·Select a recorded version

Direction
Backend → frontend
First wire field
Byte1('R')
Field entries
3
Documented flow contexts
Start-up
direction
B
manual path
/docs/18/protocol-message-formats.html
signature
AuthenticationOk (B)

Definition PG 18

Byte1('R')

Identifies the message as an authentication request.

Int32(8)

Length of message contents in bytes, including self.

Int32(0)

Specifies that the authentication was successful.

Wire fields in documented order

PositionFormatMeaning
1Byte1('R')Identifies the message as an authentication request.
2Int32(8)Length of message contents in bytes, including self.
3Int32(0)Specifies that the authentication was successful.

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Complete source facts

fields

map[description:Identifies the message as an authentication request. format:Byte1('R')], map[description:Length of message contents in bytes, including self. format:Int32(8)], map[description:Specifies that the authentication was successful. format:Int32(0)]

Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

Text language: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f