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

说明

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.

注意:

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.

参数

result

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

field

Field number, starting from 0.

返回值

The OID of the field's base type.

更新日志

版本 说明
8.1.0 The result parameter expects an PgSql\Result instance now; previously, a 资源(resource) was expected.

范例

示例 #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($res0);
?>

以上例程会输出:

Title field type OID: 1043

参见