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PL/SQL code - ORA-01795: maximum number of expressions in a list is 1000

scpig
scpig asked
on
2,336 Views
Last Modified: 2013-12-07
When this query runs, it sometimes was fine, but it sometimes produced this error.  Please advise.
BEGIN

  SELECT

ORA-01795: maximum number of expressions in a list is 1000
ORA-06512: at line 13
**************************************************************************
DECLARE
  v_cnt NUMBER;
  v_ban_list VARCHAR2(30000) := ' ';
BEGIN
  SELECT COUNT(*) INTO v_cnt FROM clm_actual_usage_${INST};

  -- insert 500 rows at a time
  FOR r IN (SELECT ban, ROWNUM AS rownum_id FROM clm_actual_usage_${INST} ORDER BY ban) LOOP
    v_ban_list := v_ban_list || r.ban || ',';
    IF MOD(r.rownum_id, 500) = 0 OR r.rownum_id = v_cnt THEN
      EXECUTE IMMEDIATE '
      INSERT /*+ APPEND */
        INTO tmp_clm_all_${INST}
             (ban, bill_cycle, ar_usage_threshold, customer_type, num_of_product, deposit_ind,
              credit_class,clm_skip_ind, ban_status,start_srvc_dt, billing_type, bc_carrier_id,
              bc_carrier_acct_id, bl_spcl_ban_code, act_usage, clm_typ_cd)
      SELECT /*+ PARALLEL(b, 20) */
             b.ban, b.bill_cycle, b.ar_usage_threshold, b.customer_type,
             NVL(b.num_of_product, 1) AS num_of_product,
             CASE WHEN (b.deposit_ind=''R'' AND ''${CINST}''=''AMT'') OR
                       (b.deposit_ind=''N'' AND ''${CINST}''=''PCT'') OR
                       (b.deposit_ind=''Z'' AND ''${CINST}''=''SWT'') OR
                       (b.deposit_ind=''R'' AND ''${CINST}''=''BLS'') THEN ''N'' ELSE b.deposit_ind END AS deposit_ind,
             b.credit_class, b.clm_skip_ind, b.ban_status, b.start_service_date,
             b.billing_type, b.bc_carrier_id, b.bc_carrier_acct_id, b.bl_spcl_ban_code, NULL AS act_usage,
             DECODE(ar_usage_threshold, NULL, ''G'', ''R'') AS clm_typ_cd
        FROM billing_account@${DB_NAME} b
       WHERE b.ban IN (' || SUBSTR(v_ban_list, 1, LENGTH(v_ban_list) - 1) || ')
      ';
      COMMIT;
      v_ban_list := ' ';
    END IF;
  END LOOP;
END;
/
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Commented:
yes this works.
and another way to work is to change 500 to 250, which works fine too.

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