ORA-01002 提取违反顺序 

ORA-01002 
ORA-01002: fetch out of sequence 
Cause: This error means that a fetch has been attempted from a cursor which is no longer valid. 
Note that a PL/SQL cursor loop implicitly does fetches, and thus may also cause this error. 
There are a number of possible causes for this error, including: 1) Fetching from a cursor 
after the last row has been retrieved and the ORA-1403 error returned. 2) If the cursor has 
been opened with the FOR UPDATE clause, fetching after a COMMIT has been issued will return 
the error. 3) Rebinding any placeholders in the SQL statement, then issuing a fetch before 
reexecuting the statement. 
Action: 1) Do not issue a fetch statement after the last row has been retrieved 
- there are no more rows to fetch. 
2) Do not issue a COMMIT inside a fetch loop for a cursor that has been opened FOR UPDATE. 
3) Reexecute the statement after rebinding, then attempt to fetch again. 


如果在遍历游标的时候 
有insert的操作，并且执行了commit 
那么，oracle会提示“ORA-01002: 提取违反顺序”