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MDB_Common::limitQuery()
Beschrijving
Executes a SQL query, but fetches only the the specificed count of rows. It is an emulation of the MySQL LIMIT option.
Parameter
- string $query
the SQL query
- array $types
if supplied, the types of the columns in the result set will be set for fetching
- integer $from
the row to start to fetch
- integer $count
the numbers of rows to fetch
Throws
Tabel 35-1. Mogelijke PEAR_Error waarden
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| MDB_ERROR_NO_DB_SELECTED | NULL | No database was choosen. | 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 statment. Ie. using LIMIT in a SQL-Statment for an Oracle database. |
Note
Deze functie kan niet statisch worden aangeroepen.
| Waarschuwing |
Deze module is EXPERIMENTEEL. Dat houdt in dat het gedrag van deze functies, deze functie namen, concreet ALLES gedocumenteerd hier kan veranderen in een toekomstige versie van dit pakket ZONDER WAARSCHUWING. Wees gewaarschuwd, en gebruik deze module op eigen risico. |
Depending on the database you will not really get more speed compared to query() . The advantage of limitQuery() is the deleting of unneeded rows in the resultset, as early as possible. So this can decrease memory usage.
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