PgPool - black_function_list problem

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Hello,

I have a problem with black_function_list which seems to work badly 
2 nodes PgSql 9.6.10 in hot_standby mode  + Pgpool 3.7.5

 primary : wal_level = hot_standby
 standby : hot_standby = on
 pgpool.conf :
  load_balance_mode = on
  ignore_leading_white_space = on
  white_function_list = ''
  black_function_list = 'curval,lastval,nextval,setval, copy_order_item.*,val_aurora_schema.copy_order_item.*,WITH ins_parent_order_item AS.*'

But error on slave node :

< 2018-09-12 14:59:33.901 CEST >>ERROR:  cannot execute SELECT in a read-only transaction
< 2018-09-12 14:59:33.901 CEST >CONTEXT:  SQL statement "WITH ins_parent_order_item AS (
          INSERT INTO val_aurora_schema.order_item
          SELECT (oi).*  -- note the parentheses
          FROM  (
             SELECT t #= hstore('id', uuid_generate_v4()::text)
               #= hstore('item_ident', uuid_generate_v4()::text)
               #= hstore('item_type', p_new_order_item_type::text)
               #= hstore('parent_ident', v_new_parent_ident::text)
               #= hstore('item_version', p_new_item_version::text)
               #= hstore('subitem_number', p_new_subitem::text)
             AS oi
             FROM  val_aurora_schema.order_item t
             WHERE  id = p_old_order_item_id
             ) sub
          RETURNING id
          )
         select id                          from ins_parent_order_item"
       PL/pgSQL function val_aurora_schema.copy_order_item(integer,character varying,character varying,boolean,boolean,integer) line 84 at SQL statement
< 2018-09-12 14:59:33.901 CEST >STATEMENT:  select * from val_aurora_schema.copy_order_item($1,$2,$3,$4,$5,$6,$7) as result

I tried to put /*NO load balance*/ before the "WITH ins_xxx" statement, but still the same problem.

Can someone help me ?

Thanks

Frédéric BOULET
boulet.f@xxxxxxxxx

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