I think, the "Unsigned"-option is not allowed at a BIT-column. If you check that option, a syntax-error is thrown.
I suggest to disable this option if BIT-datatype is selected (similar as done at VARCHAR, DATETIME, etc).
Unsigned Bit-Column
Sorry for double-posting, but the same applies to "Zerofill".
Syntax:
BIT[(M)]
And on the contrary for example:
TINYINT[(M)] [UNSIGNED] [ZEROFILL]
Source: https://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html
Syntax:
BIT[(M)]
And on the contrary for example:
TINYINT[(M)] [UNSIGNED] [ZEROFILL]
Source: https://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html
Code modification/commit
ac3f8e2
from ansgar.becker,
11 years ago,
revision 8.3.0.4750
Disable UNSIGNED and ZEROFILL checkboxes for BIT type columns. See http://www.heidisql.com/forum.php?t=15354
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