diff --git a/README b/README
index e0a2ae1..0f1b841 100644
--- a/README
+++ b/README
@@ -17,6 +17,11 @@ to install the complete compatibility environment.
 This can be an immense time-saver when porting large applications
 that rely heavily on certain MySQL functions.
 
+Versions of PostgreSQL supported
+--------------------------------
+
+This package has been tested on PostgreSQL 8.1.x.
+
 Installation
 ------------
 
@@ -124,7 +129,7 @@ this won't make any difference.
 
 * Intervals
 
-In MySQL, intervals are not quoated, eg:
+In MySQL, intervals are not quoted, eg:
 
   SELECT ADDDATE('1998-01-02', INTERVAL 31 DAY);
 
@@ -141,7 +146,7 @@ XOR, DIV and MOD named operators cannot be implemented.  Use
 
 All PostgreSQL strings are case-sensitive.  All MySQL strings are
 case-insensitive by default.  Any functions in this library that
-implement string comparision use CASE-SENSITIVE comparison, just
+implement string comparison use CASE-SENSITIVE comparison, just
 like all the other PostgreSQL string functions.
 
 * Failure to find overloaded functions
diff --git a/string.sql b/string.sql
index f158a0c..db73ba2 100644
--- a/string.sql
+++ b/string.sql
@@ -327,6 +327,350 @@ $$ IMMUTABLE STRICT LANGUAGE SQL;
 -- MAKE_SET()
 -- Not implemented
 
+-- routine to make make_set() easier
+-- note: since arrays do not support NULLs until
+CREATE OR REPLACE FUNCTION _make_set(bigint, text[])
+RETURNS text AS $$
+  DECLARE
+    up int;
+    i int = 1;
+    ret text = '';
+    dat ALIAS FOR $2;
+    found bool = false;
+    mask bigint = 1;
+  BEGIN
+    up = array_upper($2, 1);
+    IF up > 31 THEN
+      RAISE EXCEPTION 'maximum array size exceeded';
+      RETURN NULL;
+    END IF;
+    WHILE i <= up LOOP
+      IF $1 & mask <> 0 THEN
+        IF found = false THEN
+          found = true;
+        ELSE
+          ret = ret operator(pg_catalog.||) ',';
+        END IF;
+        ret = ret operator(pg_catalog.||) dat[i];
+      END IF;
+      i = i + 1;
+      mask = mask << 1;
+    END LOOP;
+    RETURN ret;
+  END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29, $30];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29, $30, $31];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
+CREATE OR REPLACE FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text)
+RETURNS text AS $$
+  DECLARE
+    a text[];
+  BEGIN
+    a = ARRAY[$2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29, $30, $31, $32];
+RETURN _make_set($1, a);
+END;
+$$ IMMUTABLE STRICT LANGUAGE PLPGSQL;
+
 -- MID()
 CREATE OR REPLACE FUNCTION mid(text, integer, integer)
 RETURNS text AS $$
diff --git a/uninstall.sql b/uninstall.sql
index 6c203b7..dfd5f3f 100644
--- a/uninstall.sql
+++ b/uninstall.sql
@@ -59,6 +59,37 @@ DROP FUNCTION mid(text, integer, integer);
 DROP FUNCTION microsecond(time without time zone);
 DROP FUNCTION maketime(integer, integer, integer);
 DROP FUNCTION makedate(integer, integer);
+DROP FUNCTION make_set(bigint, text);
+DROP FUNCTION make_set(bigint, text, text);
+DROP FUNCTION make_set(bigint, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
+DROP FUNCTION make_set(bigint, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text, text);
 DROP FUNCTION log2(numeric);
 DROP FUNCTION log10(numeric);
 DROP FUNCTION locate(text, text);
@@ -139,3 +170,4 @@ DROP FUNCTION _group_concat(text, text);
 DROP FUNCTION _date_to_integer(date);
 DROP FUNCTION _bit_xor(bigint, bigint);
 DROP FUNCTION _and(boolean, boolean);
+DROP FUNCTION _make_set(bigint, text[]);