PHP. Руководство по PHP. 2005

pg_trace

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pg_trace

(PHP 4 >= 4.0.1, PHP 5)pg_trace -- Enable tracing a PostgreSQL connection

Описание

bool pg_trace (string pathname [, string mode [, 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.

Список параметров

pathname

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

An optional file access mode, same as for fopen().
Defaults to "w".
connection

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().

Возвращаемые значения

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Примеры

Пример 1. pg_trace() example
<?php $pgsql_conn = pg_connect("dbname=mark host=localhost"); if ($pgsql_conn){ pg_trace('/tmp/trace.log', 'w', $pgsql_conn); pg_query("SELECT 1"); pg_untrace($pgsql_conn); // Now /tmp/trace.log will contain backend communication } else { print pg_last_error($pgsql_conn); exit; } ?>

Смотрите также

fopen()
pg_untrace()

Пред.
Начало
След.
pg_set_error_verbosity
Уровень выше
pg_transaction_status

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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