pg_field_type_oid

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    pg_field_type_oid — Returns the type ID (OID) for the corresponding field number

    Descripción

    pg_field_type_oid(PgSql\Result $result, int $field): string|int

    pg_field_type_oid() returns an integer containing the OID of the base type of the given field in the given result instance.

    You can get more information about the field type by querying PostgreSQL's pg_type system table using the OID obtained with this function. The PostgreSQL format_type() function will convert a type OID into an SQL standard type name.

    Nota:

    If the field uses a PostgreSQL domain (rather than a basic type), it is the OID of the domain's underlying type that is returned, rather than the OID of the domain itself.

    Parámetros

    result

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

    field

    Field number, starting from 0.

    Valores devueltos

    The OID of the field's base type.

    Historial de cambios

    Versión Descripción
    8.1.0 The result parameter expects an PgSql\Result instance now; previously, a recurso was expected.

    Ejemplos

    Ejemplo #1 Getting information about fields

    <?php
    $dbconn     = pg_connect("dbname=publisher") or die("Could not connect");

    // Assume 'title' is a varchar type
    $res = pg_query($dbconn, "select title from authors where author = 'Orwell'");

    echo     "Title field type OID: ", pg_field_type_oid($res, 0);
    ?>

    El resultado del ejemplo sería:

    Title field type OID: 1043

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    User Contributed Notes 2 notes

    up
    0
    stanislav dot perfilov at gmail dot com
    3 years ago
    <?php

    private function mapping($q, $result)
    {
    $types = [];
    for (    $i = 0, $count = \pg_num_fields($q); $i < $count; ++$i) {
    $types[$i] = \pg_field_type_oid($q, $i);
    }
    foreach (    $result as $k => &$row) {
    $i = -1;
    foreach (    $row as $name => &$value) {
    ++    $i;
    if (    $value === null) {
    continue;
    }
    switch (    $types[$i]) {
    case     20:
    case     21:
    case     23: $value = (int)$value; break;
    case     16507: /*$value = (string)$value; */break;
    default:
    throw new     \RuntimeException(
    \pg_field_type($q, $i) .' type. Need mapping ' . \pg_field_type_oid($q, $i)
    );
    }
    }
    }
    unset(    $value, $row);

    return     $result;
    }

    ?>
    up
    0
    mauroi at digbang dot com
    19 years ago
    This function can be used to improve the performance of your application.
    pg_field_type() makes an internal query to the pg_type table and it can be really slow.
    So if your application previously know the oids of your database, you can save the execution time of this query in every request.
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