pg_affected_rows

    (PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

    pg_affected_rows — Returns number of affected records (tuples)

    Description

    pg_affected_rows(PgSql\Result $result): int

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

    Since PostgreSQL 9.0 and above, the server returns the number of SELECTed rows. Older PostgreSQL return 0 for SELECT.

    Note:

    This function used to be called pg_cmdtuples().

    Parameters

    result

    An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).

    Return Values

    The number of rows affected by the query. If no tuple is affected, it will return 0.

    Changelog

    Version Description
    8.1.0 The result parameter expects an PgSql\Result instance now; previously, a resource was expected.

    Examples

    Example #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";
    ?>

    The above example will output:

    1 tuples are affected.

    See Also

    • pg_query() - Execute a query
    • pg_query_params() - Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text
    • pg_execute() - Sends a request to execute a prepared statement with given parameters, and waits for the result
    • pg_num_rows() - Returns the number of rows in a result

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    User Contributed Notes 4 notes

    up
    9
    Anonymous
    16 years ago
    pg-affected-rows () only runs on the LAST SQL STATEMENT executed. If you compound several statements together then pg_affected_rows might not return what you expect.

    For example:

    <?php

    $result     = pg_query ('BEGIN; INSERT INTO foo (bar) VALUES (\'baz\'; COMMIT');

    echo (    pg_affected_rows ($result));

    ?>

    will cause 0 to be printed, because the last statement executed by Postgres was COMMIT, which doesn't affect any rows.

    I haven't tried this so am not certain it works, but you SHOULD be able to get the row counts you want if you split your queries up.

    For example:

    <?php

    $result     = pg_query ('BEGIN; INSERT INTO foo (bar) VALUES (\'baz\';');

    echo (    pg_affected_rows ($result));

    pg_query ('COMMIT;');
    ?>

    should allow you to get the number of rows affected by the previous query. I haven't tried this yet though, so don't count on it.
    up
    -1
    Bruno Baguette
    19 years ago
    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
    up
    -2
    Anonymous
    16 years ago
    There is something called auto-commit, when you supply more than one query delimited by ; semicolon all-or-none is done if one fails. No need for BEGIN;COMMIT;ROLLBACK when doing one query. its logic to mee pg_affected_rows() returns affected rows and if you want to do 2 queries apart from each other.. do a BEGIN and then 1 and get pg_affected_rows() then do 2 and get pg_affected_rows() and then finally do COMMIT;
    up
    -3
    Anonymous
    19 years ago
    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.
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