code: def installed_extensions(user=None,
                           host=None,
                           port=None,
                           maintenance_db=None,
                           password=None,
                           runas=None):
      '''
      List installed postgresql extensions
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.installed_extensions
  
      '''
      exts = []
      query = (
          'select a.*, b.nspname as schema_name '
          'from pg_extension a,  pg_namespace b where a.extnamespace = b.oid;'
      )
      ret = psql_query(query, user=user, host=host, port=port,
                       maintenance_db=maintenance_db,
                       password=password, runas=runas)
      exts = {}
      for row in ret:
          if 'extversion' in row and 'extname' in row:
              exts[row['extname']] = row
      return extf installed_extensions(user=None,
                           host=None,
                           port=None,
                           maintenance_db=None,
                           password=None,
                           runas=None):
      '''
      List installed postgresql extensions
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.installed_extensions
  
      '''
      exts = []
      query = (
          'select a.*, b.nspname as schema_name '
          'from pg_extension a,  pg_namespace b where a.extnamespace = b.oid;'
      )
      ret = psql_query(query, user=user, host=host, port=port,
                       maintenance_db=maintenance_db,
                       password=password, runas=runas)
      exts = {}
      for row in ret:
          if 'extversion' in row and 'extname' in row:
              exts[row['extname']] = row
      return exts
docs: List installed postgresql extensions
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.installed_extensions