Thanks for pinning that down – I love the way that a small group with shared interests can sort out a problem so much faster than an individual.

Lookng at the trace file I generated the SQL statement never gets into the file – was this a guess based on the normal code that you expected to see for index stats collection, or did you have a version of the SQL that actually dumped this before crashing ?

Nice bit of research – which leads to all sorts of clues: and also shows why the problem can also appear “randomly”. If it’s about query rewrite then (with default settings for the query_rewrite_integrity parameter) the error won’t occur unless the stats collection is done AFTER a refresh but BEFORE the next change to the underlying tables.

(Add an insert to the demo code after the refresh and before stats collection, and you should find that the collection suddenly works.)

Thanks for that reference – it’s not very impressive that the problem was first reported in 9.2, and the Oracle developers still haven’t got around to adding the no_rewrite() hint to the code in 11.2.

Copy query block qb# -1 (<unnamed>) : SELECT * FROM "U"."ORDERS_JOIN"
Registered qb: SEL$4D0E67CD 0xaa7bb0 (PARSER)
---------------------
QUERY BLOCK SIGNATURE
---------------------
  signature (): qb_name=SEL$4D0E67CD nbfros=1 flg=0
    fro(0): flg=4 objn=62795 hint_alias="ORDERS_JOIN"@"SEL$4D0E67CD"

Registered qb: SEL$AD2C33E0 0xc46a80 (MV REWRITE SEL$1; SEL$1; ORDERS_JOIN)
---------------------
QUERY BLOCK SIGNATURE
---------------------
  signature (): qb_name=SEL$AD2C33E0 nbfros=1 flg=0
    fro(0): flg=0 objn=62795 hint_alias="ORDERS_JOIN"@"SEL$4D0E67CD"

CVM: Considering view merge in query block SEL$AD2C33E0 (#0)
OJE: Begin: find best directive for query block SEL$AD2C33E0 (#0)
OJE: End: finding best directive for query block SEL$AD2C33E0 (#0)
CNT:   Considering count(col) to count(*) on query block SEL$AD2C33E0 (#0)
*************************
Count(col) to Count(*) (CNT)
*************************
CNT:     COUNT() to COUNT(*) not done.
query block SEL$1 transformed to SEL$AD2C33E0 (#0)

And this is the quote from 10053 with commented sys_op_lbid :

Copy query block qb# -1 (<unnamed>) : SELECT * FROM "U"."ORDERS_JOIN"
Registered qb: SEL$4D0E67CD 0xcdb8cf30 (PARSER)
---------------------
QUERY BLOCK SIGNATURE
---------------------
  signature (): qb_name=SEL$4D0E67CD nbfros=1 flg=0
    fro(0): flg=4 objn=62795 hint_alias="ORDERS_JOIN"@"SEL$4D0E67CD"

Registered qb: SEL$AD2C33E0 0xcdb26a80 (MV REWRITE SEL$1; SEL$1; ORDERS_JOIN)
---------------------
QUERY BLOCK SIGNATURE
---------------------
  signature (): qb_name=SEL$AD2C33E0 nbfros=1 flg=0
    fro(0): flg=0 objn=62795 hint_alias="ORDERS_JOIN"@"SEL$4D0E67CD"

CVM: Considering view merge in query block SEL$AD2C33E0 (#0)
OJE: Begin: find best directive for query block SEL$AD2C33E0 (#0)
OJE: End: finding best directive for query block SEL$AD2C33E0 (#0)
CNT:   Considering count(col) to count(*) on query block SEL$AD2C33E0 (#0)
*************************
Count(col) to Count(*) (CNT)
*************************
CNT:     COUNT() to COUNT(*) not done.
query block SEL$1 transformed to SEL$AD2C33E0 (#0)
FPD: Considering simple filter push in query block SEL$AD2C33E0 (#0)
"ORDERS_JOIN"."ORDER_ID" IS NOT NULL OR "ORDERS_JOIN"."LINE_ID" IS NOT NULL
try to generate transitive predicate from check constraints for query block SEL$AD2C33E0 (#0)
finally: "ORDERS_JOIN"."ORDER_ID" IS NOT NULL OR "ORDERS_JOIN"."LINE_ID" IS NOT NULL

apadrv-start sqlid=5681247571542508886
  :
    call(in-use=21384, alloc=32712), compile(in-use=79560, alloc=85400), execution(in-use=4664, alloc=8088)

*******************************************
Peeked values of the binds in SQL statement
*******************************************

Final query after transformations:******* UNPARSED QUERY IS *******
SELECT /*+ NO_EXPAND */
 COUNT(*) "NRW",
 NULL "NDK",
 SYS_OP_COUNTCHG(SUBSTRB(ROWIDTOCHAR("ORDERS_JOIN"."ORL_ROWID"), 1, 15), 1) "CLF"
  FROM "U"."ORDERS_JOIN" "ORDERS_JOIN"
 WHERE "ORDERS_JOIN"."ORDER_ID" IS NOT NULL
    OR "ORDERS_JOIN"."LINE_ID" IS NOT NULL
...

select /*+ no_parallel_index(t, "ORL_PK")
           dbms_stats 
           cursor_sharing_exact 
           use_weak_name_resl 
           dynamic_sampling(0) 
           no_monitoring 
           no_substrb_pad  
           no_expand 
           index(t,"ORL_PK") */
       count(*) as nrw,
       count(distinct sys_op_lbid(62727, 'L', t.rowid)) as nlb,
       null as ndk,
       sys_op_countchg(substrb(t.rowid, 1, 15), 1) as clf
from "U"."ORDER_LINES" t
where "ORDER_ID" is not null or "LINE_ID" is not null;

I got no more time unfortunately for now, but may be later.