|From:||Daniel Loureiro <loureirorg(at)gmail(dot)com>|
|Subject:||DELETE with LIMIT (or my first hack)|
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frequently i have accidents with DELETE/UPDATE commands. In fact, sometimes
in the last 8 or 9 years (ok, a lot of times) I forget the entire WHERE
clause or have a “not so perfectly“ WHERE clause, with an awful suprise.
There’s no words to figure the horror ever time i see that the number of
affected rows its not 1 or two how expected, but the entire table. So I
planned to make a hack to make the “LIMIT” directive available to “DELETE”
So, can anyone help-me in how to do this ? This its my plan: 1) change the
lex grammar (wheres the file ?) 2) change the parser to accept the new
grammar 3) change the executor to stop after “n” successful iterations. Is
this correct ?
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