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DB_common::query()
Описание
Runs a query
Can be used instead of prepare() and execute(), if you set the $params parameter and your query uses placeholders. See "Intro - Prepare & Execute" for more information on this mode.
Параметр
- string $query
the SQL query or the statement to prepare
- mixed $params
array, string or numeric data to be added to the prepared statement. Quantity of items passed must match quantity of placeholders in the prepared statement: meaning 1 placeholder for non-array parameters or 1 placeholder per array element.
Возвращаемое значение
mixed - a new DB_result object for queries that return results (such as SELECT queries), DB_OK for queries that manipulate data (such as INSERT queries) or a DB_Error object on failure
Throws
Таблица 35-1. Возможные значения PEAR_Error
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| DB_ERROR_INVALID | invalid | SQL statment for preparing is not valid. | See the prepare() documentation, if you want to use a SQL statement using placeholders. |
| DB_ERROR_MISMATCH | mismatch | Quantity of parameters didn't match quantity of placeholders in the prepared statment. | Check that the number of placeholders in the prepare() statement passed to $query equals the count of entries passed to $params. |
| DB_ERROR_NODBSELECTED | no database selected | No database was chosen. | Check the DSN in connect(). |
| every other error code | Database specific error | Check the database related section of the PHP-Manual to detect the reason for this error. In the most cases a misformed SQL statement. I.e. using LIMIT in a SQL-Statement for an Oracle database. |
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