FunctionCallResponse
FunctionCallResponse is a backend protocol message. Identifies the message as a function call result.
Reading PG 18·Select a recorded version
- Direction
- Backend → frontend
- First wire field
- Byte1('V')
- Field entries
- 4
- Documented flow contexts
- Function Call
- direction
- B
- manual path
- /docs/18/protocol-message-formats.html
- signature
- FunctionCallResponse (B)
Definition PG 18
-
- Byte1('V')
-
Identifies the message as a function call result.
- Int32
-
Length of message contents in bytes, including self.
- Int32
-
The length of the function result value, in bytes (this count does not include itself). Can be zero. As a special case, -1 indicates a NULL function result. No value bytes follow in the NULL case.
- Byte
n -
The value of the function result, in the format indicated by the associated format code.
nis the above length.
Wire fields in documented order
| Position | Format | Meaning |
|---|---|---|
| 1 | Byte1('V') | Identifies the message as a function call result. |
| 2 | Int32 | Length of message contents in bytes, including self. |
| 3 | Int32 | The length of the function result value, in bytes (this count does not include itself). Can be zero. As a special case, -1 indicates a NULL function result. No value bytes follow in the NULL case. |
| 4 | Byte n | The value of the function result, in the format indicated by the associated format code. n is the above length. |
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Complete source facts
fields
map[description:Identifies the message as a function call result. format:Byte1('V')], map[description:Length of message contents in bytes, including self. format:Int32], map[description:The length of the function result value, in bytes (this count does not include itself). Can be zero. As a special case, -1 indicates a NULL function result. No value bytes follow in the NULL case. format:Int32], map[description:The value of the function result, in the format indicated by the associated format code. n is the above length. format:Byte n]Source references
Full definition and evidence JSON
Definition sources
center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
Text language: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f