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Int32(16)
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Length of message contents in bytes, including self.

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Int32(80877102)
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The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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Int32
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The process ID of the target backend.

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Int32
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The secret key for the target backend.

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Int32(16)
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Length of message contents in bytes, including self.

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Int32(80877102)
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The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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Int32
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The process ID of the target backend.

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Int32
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The secret key for the target backend.

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Int32(16)
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Length of message contents in bytes, including self.

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Int32(80877102)
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The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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Int32
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The process ID of the target backend.

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Int32
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The secret key for the target backend.

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\n
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Int32(16)
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Length of message contents in bytes, including self.

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Int32(80877102)
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The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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Int32
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The process ID of the target backend.

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Int32
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The secret key for the target backend.

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\n
\n
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Int32(16)
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Length of message contents in bytes, including self.

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Int32(80877102)
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The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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Int32
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The process ID of the target backend.

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Int32
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The secret key for the target backend.

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\n
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\n
\n
Int32(16)
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\n

Length of message contents in bytes, including self.

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\n
Int32(80877102)
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\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

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\n
Int32
\n
\n

The process ID of the target backend.

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Int32
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The secret key for the target backend.

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\n
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\n
\n
Int32(16)
\n
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Length of message contents in bytes, including self.

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\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Int32
\n
\n

The secret key for the target backend.

\n
\n
\n
\n
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\n
\n
\n
Int32(16)
\n
\n

Length of message contents in bytes, including self.

\n
\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Int32
\n
\n

The secret key for the target backend.

\n
\n
\n
\n
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\n
\n
\n
Int32
\n
\n

Length of message contents in bytes, including self.

\n
\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Byten
\n
\n

The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes.

\n
\n
\n
\n

Before protocol version 3.2, the secret key was always 4 bytes long.

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\n
\n
\n
Int32
\n
\n

Length of message contents in bytes, including self.

\n
\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Byten
\n
\n

The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes.

\n
\n
\n
\n

Before protocol version 3.2, the secret key was always 4 bytes long.

\n
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\n
\n
\n
Int32
\n
\n

Length of message contents in bytes, including self.

\n
\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Byten
\n
\n

The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes.

\n
\n
\n
\n

Before protocol version 3.2, the secret key was always 4 bytes long.

\n
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\n
\n
\n
Int32
\n
\n

Length of message contents in bytes, including self.

\n
\n
Int32(80877102)
\n
\n

The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)

\n
\n
Int32
\n
\n

The process ID of the target backend.

\n
\n
Byten
\n
\n

The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes.

\n
\n
\n
\n

Before protocol version 3.2, the secret key was always 4 bytes long.

\n
", "manual_path": "/docs/18/protocol-message-formats.html", "comparison_data": {"fields": [{"format": "Int32", "description": "Length of message contents in bytes, including self."}, {"format": "Int32(80877102)", "description": "The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)"}, {"format": "Int32", "description": "The process ID of the target backend."}, {"format": "Byte n", "description": "The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes."}], "direction": "F"}, "comparison_hash": "dc899195882d7563007c3329b648b9516242e55a3833c0945e59840954fa37a8"}, "comparison": {"left": "17", "right": "18", "status": "changed", "diff": "--- PostgreSQL 17\n+++ PostgreSQL 18\n@@ -3,7 +3,7 @@\n \"fields\": [\n {\n \"description\": \"Length of message contents in bytes, including self.\",\n- \"format\": \"Int32(16)\"\n+ \"format\": \"Int32\"\n },\n {\n \"description\": \"The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits, and 5678 in the least significant 16 bits. (To avoid confusion, this code must not be the same as any protocol version number.)\",\n@@ -14,8 +14,8 @@\n \"format\": \"Int32\"\n },\n {\n- \"description\": \"The secret key for the target backend.\",\n- \"format\": \"Int32\"\n+ \"description\": \"The secret key for the target backend. This field extends to the end of the message, indicated by the length field. The maximum key length is 256 bytes.\",\n+ \"format\": \"Byte n\"\n }\n ]\n }"}}