odbc_statistics
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_statistics — Retrieve statistics about a table
说明
odbc_statistics(
resource $odbc,
?string $catalog,
string $schema,
string $table,
int $unique,
int $accuracy
): resource|false
参数
-
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.
返回值
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
Drivers can report additional columns.
The result set is ordered by NON_UNIQUE, TYPE, INDEX_QUALIFIER,
INDEX_NAME and ORDINAL_POSITION.
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
}
?>
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
