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Bug#20752: BENCHMARK with many iterations returns too quickly

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In BENCHMARK(count, expr), count could overflow/wrap-around.
Patch changes to a sufficiently large data-type. Adds a warning
for negative count values.
This commit is contained in:
tnurnberg@mysql.com/white.intern.koehntopp.de
2008-02-24 01:31:54 +01:00
parent 730bea634f
commit 1ed076e41b
3 changed files with 26 additions and 4 deletions
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5
mysql-test/r/func_str.result
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@ -1431,6 +1431,11 @@ benchmark(100, NULL)
select benchmark(NULL, 1+1);
benchmark(NULL, 1+1)
NULL
select benchmark(-1, 1);
benchmark(-1, 1)
NULL
Warnings:
Error 1411 Incorrect count value: '-1' for function benchmark
set @password="password";
set @my_data="clear text to encode";
select md5(encode(@my_data, "password"));