code: function cond2sql(cond, not_first) {
  		var result = '';
  
  		// If there is a logical operation
  		if (typeof cond.logic != 'undefined') {
  			result = cond.terms.map(function (item) {
  				return cond2sql(item, true);
  			});
  			result = result.join(' ' + cond.logic + ' ');
  			if (typeof not_first !== 'undefined') result = '(' + result + ')';
  		}
  		// If there is a condition
  		else if (typeof cond.left != 'undefined') {
  			result = cond.left;
  			if (typeof cond.operator != 'undefined') {
  				result += ' ' + cond.operator;
  				if (typeof cond.right != 'undefined') {
  					if (cond.operator === 'IN') {
  						result += ' (' + cond.right + ')';
  					}
  					else {
  						result += ' ' + cond.right;
  					}
  				}
  			}
  		}
  		// If there is a boolean
  		else result = cond;
  
  		return result;
  	}
docs: Generate SQL from a condition AST output by sql2ast() or CondParser