SAS macro inside data step runs parallelized? Is It possible? - parallel-processing

Question

I have the following table process_table
table
index
TABLE_001
1
TABLE_002
2
TABLE_003
3
TABLE_004
4
And a macro for create tables that i called type_a tables, using lines from process_table.
So, for example, when input was TABLE_001 will generate TABLE_001_A.
%macro create_table_type_a(table_name);
proc sql;
create table temp.&table_name._A as
select
/*some process*/
from &table_name
quit;
%mend create_table_type_a;
And then I run
data _null_;
set process_table;
call execute('%create_table_type_a('||table||')');
run;
Well, I have two doubts.
1 - Does SAS process the macro sequential, one line after other, or is parallelized? I didn't find the answer on internet.
2 - If It was not parallelized, is it possible do it using the same startegy? The tables to be processed are huge, and i dont know how to parallize the process on SAS.
Thanks.

Answer 1

Good question.
No. The macros are run 'sequential', meaning that it runs %create_table_type_a(TABLE_001) before %create_table_type_a(TABLE_002) and so on. This is because Call Executes merely 'stacks' the macro calls in the data step and executes them after the data step has executed.
It is possible, but probably advanced. Reezas question of 'how huge' is pretty relevant before moving into advanced solutions of running macros in parallel.

Answer 2

You could spawn separate SAS processes for each macro call (within its own program), then wait for both to finish before proceeding.
Example
%MACRO SPAWN(PGM,JOBID) ;
systask command "/path/to/sasexe /path/to/programs/&PGM" status=job_&JOBID taskname="job_&JOBID" ;
%MEND ;
/* Run jobs asynchronously */
%SPAWN(Program1.sas,pgm1) ;
%SPAWN(Program2.sas,pgm2) ;
/* Wait for both to finish */
waitfor _ALL_ job_pgm1 job_pgm2 ;
/* ... continue processing ... */