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odbc_statistics

(PHP 4, PHP 5, PHP 7)

odbc_statisticsRetrieve statistics about a table

Описание

odbc_statistics ( resource $connection_id , string $catalog , string $schema , string $table_name , int $unique , int $accuracy ) : resource|false

Get statistics about a table and its indexes.

Список параметров

connection_id

Идентификатор соединения ODBC, за подробностями обращайтесь к odbc_connect().

catalog

Каталог ('qualifier' на языке ODBC 2).

schema

Схема ('owner' на языке ODBC 2).

table_name

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.

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
Драйверы могут сообщать дополнительные столбцы.

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_UNIQUESQL_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] =>
)

Смотрите также

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

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User Contributed Notes 1 note

up
2
eion at bigfoot dot com
9 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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