odbc_statistics
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_statistics — Retrieve statistics about a table
Beschreibung
odbc_statistics
( resource $odbc
, string|null $catalog
, string $schema
, string $table
, int $unique
, int $accuracy
) : resource|false
Parameter-Liste
-
odbc
-
Eine ODBC-Verbindungsressource,
siehe odbc_connect() für Details.
-
catalog
-
Der Katalog ('Kennzeichner' in ODBC 2 Terminologie).
-
schema
-
Das Schema ('Besitzer' in ODBC 2 Terminologie).
-
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.
Rückgabewerte
Returns an ODBC result identifierIm Fehlerfall wird false
zurückgegeben..
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
Treiber können zusätzliche Spalten melden.
The result set is ordered by NON_UNIQUE
, TYPE
, INDEX_QUALIFIER
,
INDEX_NAME
and ORDINAL_POSITION
.
Beispiele
Beispiel #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
}
?>
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
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] =>
)
Siehe auch
- odbc_tables() - Get the list of table names stored in a specific data source