Datalines within a macro will throw error

*Datalines outside a macro;
data new1;
input x 8.;
datalines;
1
2
3
;
run;

%macro test2;
*Datalines within a macro will throw error;
data new2;
input x 8.;
datalines;
1
2
3
;
run;
%mend test2;
%test2;

*ERROR: The macro TEST2 generated CARDS (data lines) for the DATA step, which could cause incorrect results. The DATA step and the macro will stop executing.;

%macro test3;
*Make use of the below method if you want to create records;
data new3;
length x 8.;
x=1; output;
x=2; output;
x=3; output;
run;
%mend test3;
%test3;

Else one can make use of proc sql insert into