odbc_statistics

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

odbc_statistics — Retrieve statistics about a table

说明

odbc_statistics(
    Odbc\Connection $odbc,
    ?string $catalog,
    string $schema,
    string $table,
    int $unique,
    int $accuracy
): Odbc\Result|false

Get statistics about a table and its indexes.

参数

odbc: ODBC 连接对象，详见 odbc_connect()。
catalog: The catalog ('qualifier' in ODBC 2 parlance).
schema: The schema ('owner' in ODBC 2 parlance).
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.

返回值

返回 ODBC 结果对象或者在失败时返回 false。

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

Drivers can report additional columns.

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

更新日志

版本	说明
8.4.0	`odbc` 现在需要 Odbc\Connection 实例；之前需要 resource。
8.4.0	此函数现在返回 Odbc\Result 实例；之前返回 resource。

示例

示例 #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
}
?>

以上示例的输出类似于：

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] =>
)

参见

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

发现了问题？

了解如何改进此页面 • 提交拉取请求 • 报告一个错误

＋添加备注

用户贡献的备注 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