Question

in postgres

• as an SQL command execute runs a prepared statement
• from within a procedure execute runs a dynamic command.

can prepared statements be called from within a procedure?

---

per Frank below, part of code to insert a user into an arbitrary schema:

  execute 'insert into '||v_schema||'.usr( login, email, name, role, pwd ) 
      values( $1, $2, $3, $4, md5($5) )
      returning usr_id'
      into v_usr_id
      using p_login, p_email, p_name, v_role, p_pwd;

notes:

• INTO clause before USING clause
• no parens around USING “args”

Answer 1

Use EXECUTE in combination with USING (available since version 8.4):

CREATE OR REPLACE FUNCTION foo(int) 
RETURNS bool
LANGUAGE plpgsql
AS
$$
BEGIN
    EXECUTE 'INSERT INTO tablename(columnname) VALUES($1);' USING($1); -- your input

    RETURN true;
END;
$$;