Commits on Aug 22, 2026

1. Print cancel key as a hex string in trace

   Currently, cancel key is printed with pqTraceOutputNchar, which prints
   printable char as char, and the rest as hex. As the cancel key is just
   random bytes, there's not much meaning to print them as chars.
   This patch introduces a new pqTraceOutputNbyte to print bytes using only
   hex.

   

   authored and Commitfest Bot committed

   Aug 22, 2026
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2. Add more regress masks in pqtrace

   Tracing ParameterStatus or StartupMessage will write parameter values
   like username, which is very likely to change depending on the test
   environment.
   This patch adds additional regress masking, hiding the parameter values
   and the packet length of ParameterStatus and StartupMessage to allow
   tests to compare traces capturing such messages.

   

   bonnefoa authored and Commitfest Bot committed

   Aug 22, 2026
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3. Add mismatch length check on pqTraceOutputNoTypeByteMessage

   Currently, pqTraceOutputMessage checks that traced messages are
   correctly consumed. However, such a check doesn't exist for messages
   with no type.
   This commit adds a similar check in pqTraceOutputNoTypeByteMessage,
   checking that the consumed bytes matches the message length.

   

   bonnefoa authored and Commitfest Bot committed

   Aug 22, 2026
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4. Make pqtrace write lines atomically

   Currently, pqtrace writes are done by doing multiple fprintf per line to
   the Pfdebug fd. This commit changes fe-trace.c to buffer each line in a
   PQExpBuffer, and write lines in Pfdebug in a single fwrite.
   This allows multiple connections to write on stdout without interfering
   with each other.

   

   bonnefoa authored and Commitfest Bot committed

   Aug 22, 2026
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5. Add PQTRACE env to enable protocol tracing in libpq

   Add 2 env vars, PQTRACE and PQTRACEFLAGS.
   When PQTRACE is set, PQtrace will be called when connection options are
   processed. This allows to enable protocol tracing on application using
   libpq without requiring specific code. Setting PQTRACE to "-" will
   output protocol tracing on stdout.
   PQTRACEFLAGS is the bitwise value of the PQTRACE_SUPPRESS_TIMESTAMPS(1)
   and PQTRACE_REGRESS_MODE(2) flags.

   

   bonnefoa authored and Commitfest Bot committed

   Aug 22, 2026
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6. Add trace of startup packets in libpq_pipeline tests

   The current way to enable tracing in libpq_pipeline only set PQtrace
   after the connection is created, missing the trace of the startup
   packets.
   This patch replaces it by the trace_file connection parameter, enabling
   PQtrace before the first packet is sent and thus tracing all protocol
   messages.

   

   bonnefoa authored and Commitfest Bot committed

   Aug 22, 2026
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