Oracle大數據量讀取：LOB variable no longer valid after subsequent fetch

Stack Overflow解決方案：python cx_Oracle版本問題，在cx_Oracle5版本上有部分限制，在cx_Oracle6版本上沒有此項限制。oracle This is a limitation of versions of cx_Oracle 5 and earlier. The new version (cx_Oracle 6) doesn't have this lim

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