Revert scan state when prompting for variable values
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by Dave Jarvis
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or by Dave Jarvis
Published on 2010-03-11T20:53:57Z
Indexed on
2010/03/11
20:59 UTC
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How do you detect the current SCAN state and revert it after changing it?
An exerpt from the script in question:
SET SCAN OFF
SET ECHO ON
SET SQLBLANKLINES ON
SET SCAN ON
UPDATE TABLE_NAME SET CREATED_BY = &&created_by;
SET SCAN OFF
The problem is that if the script doesn't have the first line (SET SCAN OFF), then the code to prompt the user should not turn the SCAN state off. In pseudocode, we'd like to do the following:
SET SCAN OFF
SET ECHO ON
SET SQLBLANKLINES ON
PUSH SCAN STATE
SET SCAN ON
UPDATE TABLE_NAME SET CREATED_BY = &&created_by;
POP SCAN STATE
The psudeocode PUSH SCAN STATE remembers the state so that if the code is altered by removing the first line, the rest of the script still works as expected.
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