CREATE TABLE table
(
  id serial NOT NULL,
  num int4 NOT NULL
) 
WITHOUT OIDS;

for ($i= 0 ; $i< 100 ; $i++) { pg_query("INSERT INTO table (num) VALUES ($i)"); }

for ($i= 0 ; $i< 100 ; $i++) { $num[$i] = $i; }
pg_query("SELECT store_num($num)");

CREATE OR REPLACE FUNCTION store_num(int4[])
  RETURNS int4 AS
$BODY$
    DECLARE i int4;
    BEGIN
        FOR i in  1 .. 100  LOOP
            INSERT INTO table (num) VALUES ($ 1 [i])
        END LOOP;
        RETURN  0 ;
    END;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

$num = "{";
for ($i= 0 ; $i< 50000 ; $i++) { $num .= $i; if ($i!= 49999 ) { $num .= ","; } }
$num .="}";

CREATE OR REPLACE FUNCTION store_num(int4[])
  RETURNS int4 AS
$BODY$
    DECLARE i int4;
    BEGIN
        PREPARE fooplan (int) AS INSERT INTO table (num) VALUES($ 1 );
        FOR i in  1 .. 100  LOOP
            EXECUTE fooplan($ 1 [i]);
        END LOOP;
        RETURN  0 ;
    END;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

CREATE TABLE tbl
(
  id serial NOT NULL,
  num int4
)

CREATE OR REPLACE FUNCTION store_num(_int4)
  RETURNS int4 AS
$BODY$
    DECLARE i int4;
    BEGIN
        FOR i in  1 .. 50000  LOOP
            INSERT INTO tbl (num) VALUES ($ 1 [i]);
        END LOOP;
        RETURN  0 ;
    END;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

for ($i= 0 ; $i< 50000 ; $i++) { pg_query("INSERT INTO tbl (num) VALUES ($i)"); }

pg_query("BEGIN");
for ($i= 0 ; $i< 50000 ; $i++) { pg_query("INSERT INTO tbl (num) VALUES ($i)"); }
pg_query("COMMIT");

$num = "{";
for ($i= 0 ; $i< 50000 ; $i++) { $num .= $i; if ($i!= 49999 ) { $num .= ","; } }
$num .="}";
pg_query("SELECT store_num('$num')");