List of all operators:

addQuery('priority', '=', 1); //= Field must be equal to value supplied. 
addQuery('priority', '>', 1); // > Field must be greater than value supplied 
addQuery('priority', '<', 3); //< Field must be less than value supplied. 
addQuery('priority', '>=', 1); //>= Field must be equal or greater than value supplied 
addQuery('priority', '<=', 3); //<= Field must be equal or less than value supplied. 
addQuery('priority', '!=', 1); //!= Field must not equal the value supplied. 
addQuery('short_description', 'STARTSWITH', 'Error'); //STARTSWITH Field must start with the value supplied. 
addQuery('short_description', 'CONTAINS', 'Error'); //CONTAINS Field must contain the value supplied somewhere in the text.
addQuery('short_description', 'IN', 'Error,Success,Failure'); //query the variable value table and supply this list of sys_ids.
addQuery('short_description', 'ENDSWITH', 'Error'); //ENDSWITH Field must terminate with the value supplied.
addQuery('short_description', 'DOES NOT CONTAIN', 'Error'); //Field must not have with the value supplied anywhere in the text
addQuery('short_description', 'NOT IN', 'Error,Success,Failure'); //get all records where the short_description field does not have the word
addQuery('sys_class_name', 'INSTANCEOF', 'cmdb_ci_computer'); //INSTANCEOF for a specified "class" for tables