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ORA-01001: invalid cursor tips
Oracle Error Tips by Burleson Consulting
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The Oracle docs note this on the
ora-01001 error*:
ORA-01001 invalid cursor
- Cause:
Either a host language program call specified an invalid cursor or the
value of the MAXOPENCURSORS option in the precompiler command were too
small. All cursors must be opened using the OOPEN call before being
referenced in any of the following calls: SQL, DESCRIBE, NAME, DEFINE,
BIND, EXEC, FETCH, and CLOSE. The Logon Data Area (LDA) must be defined
by using OLON or OLOGON. If the LDA is not defined, this message is
issued for the following calls: OPEN, COM, CON, ROL, and LOGOFF.
Action:
Check the erroneous call statement. Specify a correct LDA area or open
the cursor as required. If there is no problem with the cursor, it may
be necessary to increase the MAXOPENCURSORS option value before
precompiling.
The ORA-01001 error occurs when:
- a host language program call gave an invalid cursor for use
- the value of the
MAXOPENCURSORS option in the precompiler command was
too small
You can fix the ORA-01001 error by:
- Check your problematic call statement for any issues
- Specify a correct
LDA area or open the cursor as required
- As a last resort, increase the
MAXOPENCURSORS option value before
precompiling
As a note, the ORA-01001 error does not exist in Oracle 10g, according to the
Oracle documentation.
OraFaq.com has the following to say about the ORA-01001 error:
This is 100% a program
logic problem. You have either forgotten to code an open statement before
using a cursor, or have not noticed that the cursor has been closed and have
tried to continue using it. The following checklist may help identify the
fault:
Make sure you have an OPEN statement prior to using any explicit
cursors.
Make sure that you do not have a misplaced CLOSE statement.
If you need to do a sequence of OPEN...CLOSE...OPEN...CLOSE (perhaps
because you need to reset bind variables or to commit updates inside a loop)
check your logic flow and make sure there are no fetches between the 1st
CLOSE and the 2nd OPEN.
If you have nested loops, check that a condition in an inner loop is not
being missed which allows control to pass unexpectedly to a CLOSE in an
outer loop
Remember that a PL/SQL FOR
loop does an implicit OPEN
and CLOSE.
If you take a routine with a FOR loop and change it to a WHILE
loop you must remember to code the OPEN
and CLOSE.
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