renamed pg par columns

pg/tc.sql.tbl

@@ -4,9 +4,9 @@ drop table if exists par;
 
 SET work_mem TO '1 GB';
 
-create TEMPORARY table par(x integer not null, y integer not null);
+create TEMPORARY table par(a integer not null, b integer not null);
 
 \echo 'LOAD DATA'
 \copy par from 'INSTANCE';
 
-create index par_y on par(y);
+create index par_b on par(b);