CHAR provides for fixed-length storage of strings.
length is an unsigned integer constant. The default length for a CHAR is 1.
java.lang.String
CHAR
When CHARs and VARCHARs are mixed in expressions, the shorter value is padded with spaces to the length of the longer value.
The type of a string constant is CHAR.
The only limit on the length of CHAR data types is the value java.lang.Integer.MAX_VALUE.