pg_field_table
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.
pg_field_type_oid
(PHP 5 >= 5.1.0)
pg_field_type_oid — Returns the type ID (OID) for the corresponding field number
Descrição
int pg_field_type_oid
( resource $result
, int $field_number
)
pg_field_type_oid() returns an integer containing the OID of the base type of the given field_number in the given PostgreSQL result resource.
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.
Parâmetros
- result
-
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
- field_number
-
Field number, starting from 0.
Valor Retornado
The OID of the field's base type. FALSE is returned on error.
Exemplos
Exemplo #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);
?>
O exemplo acima irá imprimir:
Title field type OID: 1043
Veja Também
- pg_field_type() - Retorna o nome do tipo para o campo de nome correspondente
- pg_field_prtlen() - Retorna o comprimento impresso
- pg_field_name() - Retorna o nome de um campo
User Contributed Notes
pg_field_type_oid
pg_field_type_oid
mauroi at digbang dot com
24-Mar-2005 04:55
24-Mar-2005 04:55