GoLang pg_trace

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PHP pg_trace

PHP original manual for pg_trace [ show | php.net ]


(PHP 4 >= 4.0.1, PHP 5, PHP 7)

pg_traceEnable tracing a PostgreSQL connection


bool pg_trace ( string $pathname [, string $mode = "w" [, resource $connection ]] )

pg_trace() enables tracing of the PostgreSQL frontend/backend communication to a file. To fully understand the results, one needs to be familiar with the internals of PostgreSQL communication protocol.

For those who are not, it can still be useful for tracing errors in queries sent to the server, you could do for example grep '^To backend' trace.log and see what queries actually were sent to the PostgreSQL server. For more information, refer to the » PostgreSQL Documentation.



The full path and file name of the file in which to write the trace log. Same as in fopen().


An optional file access mode, same as for fopen().


PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

Return Values

Returns TRUE on success or FALSE on failure.


Example #1 pg_trace() example

pg_connect("dbname=mark host=localhost");

if (
$pgsql_conn) {
pg_query("SELECT 1");
// Now /tmp/trace.log will contain backend communication
} else {

See Also