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SDO_Exception::getCause — Get the cause of the exception.
此函数是实验性的。此函数的表象,包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。
Returns the cause of this exception or NULL if the cause is nonexistent or unknown. Typically the cause will be an SDO_CPPException object, which may be used to obtain additional diagnostic information.
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Returns the cause of this exception or NULL if the cause is nonexistent or unknown.