What's the difference between MySQL BOOL and BOOLEAN column data types?
As established in other comments, they're synonyms for TINYINT(1).
*So, why do they bother differentiating between bool, boolean, tiny*int(1)?
Mostly semantics.
Bool and Boolean: MySQL default converts these to the tinyint type. Per a MySQL statement made around the time of this writing, "We intend to implement full boolean type handling, in accordance with standard SQL, in a future MySQL release."
0 = FALSE1 = TRUE
TINYINT: Occupies one byte; ranges from -128 to +127; or, 0 – 256.
Commonly brought up in this comparison:After MySQL 5.0.3 -- Bit: Uses 8 bytes and stores only binary data.
One thing I just noticed - with a column defined as BOOL in MySql, Spring Roo correctly generates Java code to unmarshall the value to a Boolean, so presumably specifying BOOL can add some value, even if it's only in the nature of a hint about the intended use of the column.