On 31 Aug 2011, at 4:55am, Tarun wrote:
> Is there any configurable parameter which allows us to set maximum
> number of records that is allowed to be inserted. Once this limit is
> reached, insert SQL query should fail inserting records telling max
> records have been inserted in DB table.
sqlite> CREATE TABLE testTable (id INTEGER PRIMARY KEY CHECK (id <= 5), name
TEXT);
sqlite> INSERT INTO testTable (name) VALUES ('Frederick');
sqlite> INSERT INTO testTable (name) VALUES ('Mabel');
sqlite> INSERT INTO testTable (name) VALUES ('Cuthbert');
sqlite> INSERT INTO testTable (name) VALUES ('Maud');
sqlite> INSERT INTO testTable (name) VALUES ('Reginald');
sqlite> INSERT INTO testTable (name) VALUES ('Flora');
Error: constraint failed
You should, of course, be handling errors in your own code and since you can
placed only one constraint on this table, you can assume that a constraint
failure means you've reached the maximum id.
You do need to consider quite carefully what happens if a record is DELETEd, or
whether your understanding of the data would ever allow this to happen in the
first place.
Simon.
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