kroki/tomash@moonlight.intranet b8d5451565 BUG#17047: CHAR() and IN() can return NULL without signaling NULL result ...

The problem was that some functions (namely IN() starting with 4.1, and
CHAR() starting with 5.0) were returning NULL in certain conditions,
while they didn't set their maybe_null flag.  Because of that there could
be some problems with 'IS NULL' check, and statements that depend on the
function value domain, like CREATE TABLE t1 SELECT 1 IN (2, NULL);.

The fix is to set maybe_null correctly.

2006-11-16 13:21:38 +03:00

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