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Bug#11758543 50756: BIGINT '100' MATCHES 1.001E2
Expressions of the form
BIGINT_COL <compare> <non-integer constant>
should be done either as decimal, or float.
Currently however, such comparisons are done as int,
which means that the constant may be truncated,
and yield false positives/negatives for all queries
where compare is '>' '<' '>=' '<=' '=' '!='.
BIGINT_COL IN <list of contstants>
and
BIGINT_COL BETWEEN <constant> AND <constant>
are also affected.
mysql-test/r/bigint.result:
New tests.
mysql-test/r/func_in.result:
BIGINT <=> string comparison should be done as float,
so a warning for the value 'abc' is appropriate.
mysql-test/t/bigint.test:
New tests.
sql/item_cmpfunc.cc:
In convert_constant_item() we verify that the constant item
can be stored in the given field.
For BIGINT columns (MYSQL_TYPE_LONGLONG) we must verify that the
stored constant value is actually comparable as int,
i.e. that the value was not truncated.
For between: compare as int only if both arguments convert correctly to int.
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