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SDO_Sequence::getProperty — Return the property for the specified sequence index.
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。使用本扩展风险自担 。
Return the property for the specified sequence index.
The position of the element in the sequence.
An SDO_Model_Property. A return value of NULL means the sequence element does not belong to a property and must therefore be unstructured text.
Thrown if the sequence index is less than zero or greater than the size of the sequence.