pg_trace() enables tracing of the PostgreSQL
frontend/backend communication to a debugging file specified as
pathname. 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 query actually were sent to the
PostgreSQL server. For more information, refer to PostgreSQL
manual.
pathname and mode
are the same as in fopen()
(mode defaults to 'w'),
connection specifies the connection to
trace and defaults to the last one opened.
pg_trace() returns TRUE if
pathname could be opened for logging,
FALSE otherwise.
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Php pg trace syntax tutorial
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