MDB_Common::getOne()

MDB_Common::getOne() – fetch the first column of the first row

Synopsis

require_once 'MDB.php';

mixed &getOne ( string $query , string $type = null , array $params = array() , array $param_types = null )

Description

Fetch the first column of the first row of data returned from a query. The function takes care of doing the query and freeing the results when finished.

Parameter

string $query

the SQL query or the statement to prepare

string $type

if supplied, the type of the column in the result set will be set for fetching

array $params

if supplied, prepareQuery()/ executeQuery() will be used with this array as execute parameters

array $param_types

if supplied, the values in $param will automatically set to the passed datatypes

Return value

mixed - the returned value or a MDB_Error, if fail

Throws

Possible PEAR_Error values
Error code Error message Reason Solution
MDB_ERROR_INVALID NULL SQL statement for preparing is not valid. See the prepareQuery() documentation, if you want to use a SQL statemt using wildcards.
MDB_ERROR_NEED_MORE_DATA NULL To less data for filling the prepared SQL statement. Check the number of wild cards given in the SQL statement prepareQuery() . Check the count of entries in the array for $params. The count of entries have to be equal to the number of wild cards.
MDB_ERROR_NO_DB_SELECTED NULL No database was chosen. Check the DSN in connect() .
every other error code   Database specific error Check the database related section of PHP-Manual to detect the reason for this error. In the most cases a misformed SQL statement. Ie. using LIMIT in a SQL-Statement for an Oracle database.

Note

This function can not be called statically.

Fetch a single column (Previous) fetch the first row (Next)
Last updated: Sun, 20 Apr 2014 — Download Documentation
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