A bit is described as boolean value to any target (in this case, CDC zos)
The only valid mapping on CDC zos for boolean is to a binary type
field. (BINARY, (VAR)CHAR FOR BIT or a (VAR)CHAR field that has been
overridden to binary) Valid mappings for boolean are to boolean,
binary or BLOB. DB2/zos does not support boolean.
As a workaround, a derived column will achieve the results in cdc zos target
ie. %TONUMBER(%IF(%TOCHAR(column_name,1)='y',0,1))
Tags: 
cdc