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(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_statistics — Retrieve statistics about a table
$odbc,$catalog,$schema,$table,$unique,$accuracyGet statistics about a table and its indexes.
odbc
ODBC 连接标识符，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.
Returns an ODBC result identifier 或者在失败时返回 false.
The result set has the following columns:
TABLE_CATTABLE_SCHEMTABLE_NAMENON_UNIQUEINDEX_QUALIFIERINDEX_NAMETYPEORDINAL_POSITIONCOLUMN_NAMEASC_OR_DESCCARDINALITYPAGESFILTER_CONDITION
The result set is ordered by NON_UNIQUE, TYPE, INDEX_QUALIFIER,
INDEX_NAME and ORDINAL_POSITION.
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
}
?>
以上例程的输出类似于：
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] =>
)
