diff --git a/.gitignore b/.gitignore
index 3c3629e..28f1ba7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules
+.DS_Store
\ No newline at end of file
diff --git a/base/mp_getddl.sas b/base/mp_getddl.sas
index b9425b4..ce3dca6 100644
--- a/base/mp_getddl.sas
+++ b/base/mp_getddl.sas
@@ -13,9 +13,11 @@
         label x='blah';
       run;
       proc sql; describe table &syslast;
-
       %mp_getddl(work,test,flavour=tsql,showlog=YES)
 
+  <h4> Dependencies </h4>
+  @li mp_getconstraints.sas
+
   @param lib libref of the library to create DDL for.  Should be assigned.
   @param ds dataset to create ddl for
   @param fref= the fileref to which to write the DDL.  If not preassigned, will
@@ -26,11 +28,9 @@
     ,else libref)
   @param applydttm= for non SAS DDL, choose if columns are created with native
    datetime2 format or regular decimal type
-
   @version 9.3
   @author Allan Bowe
   @source https://github.com/sasjs/core
-
 **/
 
 %macro mp_getddl(libref,ds,fref=getddl,flavour=SAS,showlog=NO,schema=
@@ -54,16 +54,6 @@ create table _data_ as
   ;
 %local tabinfo; %let tabinfo=&syslast;
 
-create table _data_ as
-  select * from dictionary.indexes
-  where upcase(libname)="%upcase(&libref)"
-  %if %length(&ds)>0 %then %do;
-    and upcase(memname)="%upcase(&ds)"
-  %end;
-  order by idxusage, indxname, indxpos
-  ;
-%local idxinfo; %let idxinfo=&syslast;
-
 create table _data_ as
   select * from dictionary.columns
   where upcase(libname)="%upcase(&libref)"
@@ -72,10 +62,39 @@ create table _data_ as
   %end;
   ;
 %local colinfo; %let colinfo=&syslast;
+
 %local dsnlist;
-select distinct upcase(memname) into: dsnlist
+  select distinct upcase(memname) into: dsnlist
   separated by ' '
-  from &syslast;
+  from &syslast
+;
+quit;
+
+/* Extract all Primary Key and Unique data constraints */
+%mp_getconstraints(lib=%upcase(&libref),ds=%upcase(&ds),outds=_data_)
+%local colconst; %let colconst=&syslast;
+
+%macro addConst();
+    data _null_;
+      length ctype $11;
+      set &colconst (where=(table_name="&curds" and constraint_type in ('PRIMARY','UNIQUE'))) end=last;
+      file &fref mod;
+      by constraint_type constraint_name;
+      if upcase(strip(constraint_type)) = 'PRIMARY' then ctype='PRIMARY KEY';
+      else ctype=strip(constraint_type);
+      %if &flavour=TSQL %then %do;
+        column_name=catt('[',column_name,']');
+        constraint_name=catt('[',constraint_name,']');
+      %end;
+      if first.constraint_name then do;
+        put "   ,CONSTRAINT " constraint_name ctype "(" ;
+        put '     ' column_name;
+      end;
+	  else put '     ,' column_name;
+	  if last.constraint_name then put "   )";
+    run;
+%mend;
+
 data _null_;
   file &fref;
   put "/* DDL generated by &sysuserid on %sysfunc(datetime(),datetime19.) */";
@@ -84,13 +103,14 @@ run;
 %local x curds;
 %if &flavour=SAS %then %do;
   data _null_;
-    file &fref;
+    file &fref mod;
     put "proc sql;";
   run;
   %do x=1 %to %sysfunc(countw(&dsnlist));
     %let curds=%scan(&dsnlist,&x);
     data _null_;
       file &fref mod;
+      if _n_ eq 1 then put "/* SAS Flavour DDL for %upcase(&libref).&curds */";
       length nm lab $1024;
       set &colinfo (where=(upcase(memname)="&curds")) end=last;
 
@@ -109,22 +129,14 @@ run;
       lab=" label="!!quote(trim(label));
       if notnull='yes' then notnul=' not null';
       put name type len fmt notnul lab;
-      if last then put ');';
     run;
 
+    /* Extra step for data constraints */
+    %addConst()
+
     data _null_;
-      length ds $128;
-      set &idxinfo (where=(memname="&curds")) end=last;
       file &fref mod;
-      by idxusage indxname;
-      if unique='yes' then uniq=' unique';
-      ds=cats(libname,'.',memname);
-      if first.indxname then do;
-        put 'create ' uniq ' index ' indxname;
-        put '  on ' ds '(' name @@;
-      end;
-      else put ',' name @@;
-      if last.indxname then put ');';
+      put ');';
     run;
 /*
     ods output IntegrityConstraints=ic;
@@ -146,7 +158,7 @@ run;
     %let curds=%scan(&dsnlist,&x);
     data _null_;
       file &fref mod;
-      put "/* DDL for &schema..&curds */";
+      put "/* TSQL Flavour DDL for &schema..&curds */";
     data _null_;
       file &fref mod;
       set &colinfo (where=(upcase(memname)="&curds")) end=last;
@@ -169,31 +181,12 @@ run;
       else if length le 8000 then fmt='[varchar]('!!cats(length)!!')';
       else fmt=cats('[varchar](max)');
       if notnull='yes' then notnul=' NOT NULL';
-      put name fmt notnul;
-    run;
-    data _null_;
-      length ds $128;
-      set &idxinfo (where=(memname="&curds"));
-      file &fref mod;
-      by idxusage indxname;
-      if unique='yes' then uniq=' unique';
-      ds=cats(libname,'.',memname);
-      if first.indxname then do;
-        if unique='yes' and nomiss='yes' then do;
-          put '  ,constraint [' indxname '] PRIMARY KEY';
-        end;
-        else if unique='yes' then do;
-          /* add nonclustered in case of multiple unique indexes */
-          put '  ,index [' indxname '] UNIQUE NONCLUSTERED';
-        end;
-        put '  (';
-        put '    [' name ']';
-      end;
-      else put '    ,[' name ']';
-      if last.indxname then do;
-        put '  )';
-      end;
+      put "[" name +(-1) "]" fmt notnul;
     run;
+
+    /* Extra step for data constraints */
+    %addConst()
+
     data _null_;
       file &fref mod;
       put ')';
@@ -255,32 +248,15 @@ run;
       if notnull='yes' then notnul=' NOT NULL';
       put name fmt notnul;
     run;
-    data _null_;
-      length ds $128;
-      set &idxinfo (where=(memname="&curds"));
-      file &fref mod;
-      by idxusage indxname;
-      if unique='yes' then uniq=' unique';
-      ds=cats(libname,'.',memname);
-      if first.indxname then do;
-        if unique='yes' and nomiss='yes' then do;
-          put '  ,PRIMARY KEY ';
-        end;
-        else if unique='yes' then do;
-          /* add nonclustered in case of multiple unique indexes */
-          put '  ,UNIQUE ';
-        end;
-        put '  (' name ;
-      end;
-      else put '    ,' name ;
-      if last.indxname then do;
-        put '  )';
-      end;
-    run;
+
+    /* Extra step for data constraints */
+    %addConst()
+
     data _null_;
       file &fref mod;
       put ');';
     run;
+
   %end;
 %end;
 %if &showlog=YES %then %do;
@@ -292,4 +268,4 @@ run;
   run;
 %end;
 
-%mend;
+%mend;
\ No newline at end of file