PHP: pg_affected_rows

Описание

int pg_affected_rows ( resource result )

pg_affected_rows() returns the number of tuples (instances/records/rows) affected by INSERT, UPDATE, and DELETE queries.

Замечание: This function used to be called pg_cmdtuples().

Список параметров

result: PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).

Примеры

Пример 1. pg_affected_rows() example

<?php $result = pg_query($conn, "INSERT INTO authors VALUES ('Orwell', 2002, 'Animal Farm')"); $cmdtuples = pg_affected_rows($result); echo $cmdtuples . " tuples are affected.\n"; ?>
Результат выполнения данного примера:
1 tuples are affected.

pg_affected_rows

05-Aug-2005 03:31


That's not quite true, I've been able to execute multiple queries in a single call just fine. In stead, it has to do with the fact this function returns the affected rows for the last executed query, not the last set of queries specified to a single call to pg_query.

29-Jun-2005 06:15


Concering Bruno Baguette's note:



The pg_query function only allows one query per function call.  When you do your

$sql="BEGIN;

INSERT ...

COMMIT;";

$result=pg_query($conn,$sql);

echo pg_affected_rows($result);



you get a zero, because only the BEGIN; is executed.



The single query per call is, I beleive, a PHP builtin protection against SQL injection attacks.  (Ie someone submitting a string paramter that ends the current query and appends another one)

Bruno Baguette
28-Jun-2005 01:45


Note that when you submit several SQL queries, within one BEGIN;COMMIT; like this one :



$SQLQuery = 'BEGIN;';

$SQLQuery.= 'INSERT INTO a (a,b) VALUES (1,2);';

$SQLQuery.= 'INSERT INTO b (ref_b,c) VALUES (2,5);';

$SQLQuery.= 'COMMIT;';



$HandleResults = pg_query($SQLQuery);

echo(pg_affected_rows($HandleResults));



pg_affected_rows() will return 0

pg_affected_rows

Описание

Список параметров

Возвращаемые значения

Примеры

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