odbc_statistics

(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_statistics — Retrieve statistics about a table

Опис

odbc_statistics(
    resource $odbc,
    ?string $catalog,
    string $schema,
    string $table,
    int $unique,
    int $accuracy
): resource|false

Get statistics about a table and its indexes.

Параметри

odbc: Ідентифікатор з'єднання ODBC. Докладніше: odbc_connect().
catalog: Каталог ('qualifier' мовою ODBC 2).
schema: Схема ('owner' мовою ODBC 2).
table: The table name.
unique: The type of the index. One of SQL_INDEX_UNIQUE or SQL_INDEX_ALL.
accuracy: One of SQL_ENSURE or SQL_QUICK. The latter requests that the driver retrieve the CARDINALITY and PAGES only if they are readily available from the server.

Значення, що повертаються

Returns an ODBC result identifier або false в разі помилки.

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

Драйвер може оголошувати додаткові стовпці.

The result set is ordered by NON_UNIQUE, TYPE, INDEX_QUALIFIER, INDEX_NAME and ORDINAL_POSITION.

Приклади

Приклад #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
}
?>

Поданий вище приклад виведе щось схоже на:

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] =>
)

Прогляньте також

odbc_tables() - Get the list of table names stored in a specific data source

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User Contributed Notes 1 note

down

eion at bigfoot dot com ¶

13 years ago

A couple of the function parameters are undefined:

unique - determines whether you want to return just unique indexes or all indexes.  Use SQL_INDEX_UNIQUE or SQL_INDEX_ALL for this parameter

accuracy - whether you wan to return everything there is to know about the table or just what information is readily available.  Use SQL_ENSURE or SQL_QUICK for this parameter

For a bit more info about this function see the ODBC function SQLStatistics() at http://msdn.microsoft.com/en-us/library/ms711022(v=vs.85).aspx

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