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PHP5中文手册
SDO_DAS_Relational::executeQuery(No version information available, might be only in CVS) SDO_DAS_Relational::executeQuery — Executes a given SQL query against a relational database and returns the results as a normalised data graph. 说明
SDODataObject
SDO_DAS_Relational::executeQuery
(
PDO
$database_handle
,
string
$SQL_statement
[,
array
$column_specifier
] )
Warning
本函数是实验性的。本函数的行为,包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。 Executes a given query against the relational database, using the supplied PDO database handle. Uses the model that it built from the the metadata to interpret the result set. Returns a data graph. 参数
返回值Returns a data graph. Specifically, it returns a root object of a special type. Under this root object will be the data from the result set. The root object will have a multi-valued containment property with the same name as the application root type specified on the constructor, and that property will contain one or more data objects of the application root type. In the event that the query returns no data, the special root object will still be returned but the containment property for the application root type will be empty. 错误/异常SDO_DAS_Relational::executeQuery() can throw an SDO_DAS_Relational_Exception if it is unable to construct the data graph correctly. This can occur for a number of reasons: for example if it finds that it does not have primary keys in the result set for all the objects. It also catches any PDO exceptions and obtains PDO diagnostic information which it includes in an SDO_DAS_Relational_Exception which it then throws. 范例Please see the Examples section in the general information about the Relational DAS for many examples of calling this method. |