odbc_statistics
(PHP 4, PHP 5, PHP 7)
odbc_statistics — Retrieve statistics about a table
Описание
$odbc
, string|null $catalog
, string $schema
, string $table
, int $unique
, int $accuracy
) : resource|falseGet statistics about a table and its indexes.
Список параметров
-
odbc
-
Идентификатор соединения ODBC, за подробностями обращайтесь к odbc_connect().
-
catalog
-
Каталог ('qualifier' на языке ODBC 2).
-
schema
-
Схема ('owner' на языке ODBC 2).
-
table
-
The table name.
-
unique
-
The type of the index. One of
SQL_INDEX_UNIQUE
orSQL_INDEX_ALL
. -
accuracy
-
One of
SQL_ENSURE
orSQL_QUICK
. The latter requests that the driver retrieve theCARDINALITY
andPAGES
only if they are readily available from the server.
Возвращаемые значения
Returns an ODBC result identifier или false
в случае возникновения ошибки.
The result set has the following columns:
TABLE_CAT
TABLE_SCHEM
TABLE_NAME
NON_UNIQUE
INDEX_QUALIFIER
INDEX_NAME
TYPE
ORDINAL_POSITION
COLUMN_NAME
ASC_OR_DESC
CARDINALITY
PAGES
FILTER_CONDITION
The result set is ordered by NON_UNIQUE
, TYPE
, INDEX_QUALIFIER
,
INDEX_NAME
and ORDINAL_POSITION
.
Примеры
Пример #1 List Statistics of a Table
<?php
$conn = odbc_connect($dsn, $user, $pass);
$statistics = odbc_statistics($conn, 'TutorialDB', 'dbo', 'TEST', SQL_INDEX_UNIQUE, SQL_QUICK);
while (($row = odbc_fetch_array($statistics))) {
print_r($row);
break; // further rows omitted for brevity
}
?>
Результатом выполнения данного примера будет что-то подобное:
Array ( [TABLE_CAT] => TutorialDB [TABLE_SCHEM] => dbo [TABLE_NAME] => TEST [NON_UNIQUE] => [INDEX_QUALIFIER] => [INDEX_NAME] => [TYPE] => 0 [ORDINAL_POSITION] => [COLUMN_NAME] => [ASC_OR_DESC] => [CARDINALITY] => 15 [PAGES] => 3 [FILTER_CONDITION] => )