Ah, interesting: I've tested this on bigger query and it looks (at least on
my Oracle 19.11) it dumps only first 4096 bytes:
Full text: https://gist.github.com/xtender/c823573170b09f76ba98d355863c4e12
alter session set tracefile_identifier='compiler3';
alter session set events 'trace [SQL_Compiler.*] disk=high';
declare csql clob:='select/*+ findme*/ 1 x0';
begin
for i in 1..500 loop
csql:=csql || rpad(',1',40,'0') || ' x'||i;
end loop;
csql:=csql||' () from dual';
for i in 1..1e5 loop
execute immediate csql;
end loop;
end;
/
disc
]# tail *compiler3*.trc
2021-07-12 18:05:55.424*:SQL_Compiler:opitca.c@2435:opitca(end):
End of opitca for curnum#=3 sqlid=<unknown>
qesdpDPCSetupNextExec(enter): SQL_ID=4gyc8k159wp2s
AP: qesdpDPCSetupNextExec: Not an adaptive plan
qesdpInitExecMutable(enter): SQL_ID=4gyc8k159wp2s
qesdpInitExecMut (exit)
qesdpSetupMutable(enter): SQL_ID=4gyc8k159wp2s
Enabling tracing for cur#=1 sqlid=b9haqy47mhw4s top-level
Parsing cur#=1 sqlid=b9haqy47mhw4s len=22429
sql=select/*+ findme*/ 1 x0,100000000000000000000000000000000000000
x1,100000000000000000000000000000000000000
x2,100000000000000000000000000000000000000
x3,100000000000000000000000000000000000000
x4,100000000000000000000000000000000000000
x5,100000000000000000000000000000000000000
x6,100000000000000000000000000000000000000
x7,100000000000000000000000000000000000000
x8,100000000000000000000000000000000000000
x9,100000000000000000000000000000000000000
x10,100000000000000000000000000000000000000
x11,100000000000000000000000000000000000000
x12,100000000000000000000000000000000000000
x13,100000000000000000000000000000000000000
x14,100000000000000000000000000000000000000
x15,100000000000000000000000000000000000000
x16,100000000000000000000000000000000000000
x17,100000000000000000000000000000000000000
x18,100000000000000000000000000000000000000
x19,100000000000000000000000000000000000000
x20,100000000000000000000000000000000000000
x21,100000000000000000000000000000000000000
x22,100000000000000000000000000000000000000
x23,100000000000000000000000000000000000000
x24,100000000000000000000000000000000000000
x25,100000000000000000000000000000000000000
x26,100000000000000000000000000000000000000
x27,100000000000000000000000000000000000000
x28,100000000000000000000000000000000000000
x29,100000000000000000000000000000000000000
x30,100000000000000000000000000000000000000
x31,100000000000000000000000000000000000000
x32,100000000000000000000000000000000000000
x33,100000000000000000000000000000000000000
x34,100000000000000000000000000000000000000
x35,100000000000000000000000000000000000000
x36,100000000000000000000000000000000000000
x37,100000000000000000000000000000000000000
x38,100000000000000000000000000000000000000
x39,100000000000000000000000000000000000000
x40,100000000000000000000000000000000000000
x41,100000000000000000000000000000000000000
x42,100000000000000000000000000000000000000
x43,100000000000000000000000000000000000000
x44,100000000000000000000000000000000000000
x45,100000000000000000000000000000000000000
x46,100000000000000000000000000000000000000
x47,100000000000000000000000000000000000000
x48,100000000000000000000000000000000000000
x49,100000000000000000000000000000000000000
x50,100000000000000000000000000000000000000
x51,100000000000000000000000000000000000000
x52,100000000000000000000000000000000000000
x53,100000000000000000000000000000000000000
x54,100000000000000000000000000000000000000
x55,100000000000000000000000000000000000000
x56,100000000000000000000000000000000000000
x57,100000000000000000000000000000000000000
x58,100000000000000000000000000000000000000
x59,100000000000000000000000000000000000000
x60,100000000000000000000000000000000000000
x61,100000000000000000000000000000000000000
x62,100000000000000000000000000000000000000
x63,100000000000000000000000000000000000000
x64,100000000000000000000000000000000000000
x65,100000000000000000000000000000000000000
x66,100000000000000000000000000000000000000
x67,100000000000000000000000000000000000000
x68,100000000000000000000000000000000000000
x69,100000000000000000000000000000000000000
x70,100000000000000000000000000000000000000
x71,100000000000000000000000000000000000000
x72,100000000000000000000000000000000000000
x73,100000000000000000000000000000000000000
x74,100000000000000000000000000000000000000
x75,100000000000000000000000000000000000000
x76,100000000000000000000000000000000000000
x77,100000000000000000000000000000000000000
x78,100000000000000000000000000000000000000
x79,100000000000000000000000000000000000000
x80,100000000000000000000000000000000000000
x81,100000000000000000000000000000000000000
x82,100000000000000000000000000000000000000
x83,100000000000000000000000000000000000000
x84,100000000000000000000000000000000000000
x85,100000000000000000000000000000000000000
x86,100000000000000000000000000000000000000
x87,100000000000000000000000000000000000000
x88,100000000000000000000000000000000000000
x89,100000000000000000000000000000000000000
x90,100000000000000000000000000000000000000
x91,100000000000000000000000000000000000000
x92,100000000000000000000000000000000
On Mon, Jul 12, 2021 at 9:00 PM Jonathan Lewis <jlewisoracle@xxxxxxxxx>
wrote:
Sayan,
Coincidentally your statement is 20 characters - and it's possible that
that's also the limit of the number of characters that could be dumped. It
seems that it might be the limit for invalid SQL getting into x$kglob.
Regards
Jonathan Lewis
On Mon, 12 Jul 2021 at 18:40, Sayan Malakshinov <xt.and.r@xxxxxxxxx>
wrote:
Nenad,
I've just ran short test with ORA-00936: missing expression:
SQL> select () from dual
*
ERROR at line 1:
ORA-00936: missing expression
Test case:
alter session set tracefile_identifier='compiler';
alter session set events 'trace [*SQL_Compiler*.*] disk=high
errorstack(2)';
select () from dual;
disc
And got it in the trace file:
# grep -A2 -B5 "Parsing cur" *compiler*
ts:1626111216[07/12/2021 17:33:36] [1000:55926] type:3 [MASTER UPD
MIN-SCN] inst#:0 inc#:0 min-scn: 0x0000000000414df9 global-recent-scn:
0x000000000068c2a4 calc-scn: 0x000000000068c2a5
grec-scn: 0x000000000068c2a4 gmin-scn: 0x0000000000414df9 calc-scn:
0x000000000068c2a5
scn-map not available - probably slave
End Dumping Min-Act Trace
----- Pluggagle DB Traces -----
Parsing cur#=5 sqlid=0g4um7fjk6mg4 len=20
sql=select () from dual
So at least we can be sure that parse errors are traced by "SQL_Compiler"
On Mon, Jul 12, 2021 at 8:31 PM Mohamed Houri <mohamed.houri@xxxxxxxxx>
wrote:
Nenad
In a case similar to yours I was saved by to *dba_hist_sqltext* :-)
select sql_text from dba_hist_sqltext where sql_id = '6tcs65pchhp71';
https://hourim.wordpress.com/2018/03/17/library-cache-lock/
Best regards
Mohamed
Le lun. 12 juil. 2021 à 19:20, Noveljic Nenad <
nenad.noveljic@xxxxxxxxxxxx> a écrit :
This statement could be considered invalid because it failed parsing
(due to memory allocation error).
The same text (~ 20 characters long) was shown in v$sqlarea.text as
well.
Interestingly, oradebug current_sql shows a much longer text. It’s
possible that this is the unparsed text – the Oracle dedicated server
process has the full text all the time, but it’s just not externalized
until the parsing is over. Unfortunately, this text is trimmed – maybe by
the oradebug presentation layer code.
Best regards,
Nenad
*From:* oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> *On
Behalf Of *Jonathan Lewis
*Sent:* Montag, 12. Juli 2021 19:08
*To:* ORACLE-L (oracle-l@xxxxxxxxxxxxx) <oracle-l@xxxxxxxxxxxxx>
*Subject:* Re: sql_text during parsing
I was just looking back at a note I wrote a few years ago (
https://jonathanlewis.wordpress.com/2017/10/03/parsing ;) about
invalid SQL getting into the library cache (x$kglob) even though not being
made visible through v$sql; and I've only just noticed that the content was
trimmed to the first 20 charactes - which is the same as the fragment that
you found with the query.I suggested. So now I'm wondering whether it's
just a small chunk acting as a place-holder in the library cache, until the
parse is complete - although this comment from Liron Amitzi on the blog
note suggests it might be the whole thing:
https://jonathanlewis.wordpress.com/2017/10/03/parsing/#comment-101173
Regards
Jonathan Lewis
On Mon, 12 Jul 2021 at 17:52, Noveljic Nenad <
nenad.noveljic@xxxxxxxxxxxx> wrote:
A combination of Andy's and Jonathan's ideas to try tomorrow:
set long 10000
oradebug setospid ...
oradebug current_sql
Best regards,
Nenad
-----Original Message-----
From: Noveljic Nenad
Sent: Montag, 12. Juli 2021 18:35
To: 'Stefan Koehler' <contact@xxxxxxxx>; ORACLE-L (
oracle-l@xxxxxxxxxxxxx) <oracle-l@xxxxxxxxxxxxx>
Subject: RE: sql_text during parsing
Hi Stefan,
I suspended the process during parsing and got the process dump and
error stack trace, but nothing.
My guess is that the statement is properly registered in the memory
(from the Oracle C code perspective) only after the parsing.
Unless someone comes up with a better idea, I'll ask Tableau people
tomorrow if they could trace generated SQLs on the client.
Otherwise, I have to look for SQL text in the process private memory.
In 12c, the second argument to the first qcplgte call (there are many
recursive calls to this function) contained the pointer to a structure
which contained the pointer to SQL text. I'll start from there.
Best regards,
Nenad
-----Original Message-----
From: Stefan Koehler <contact@xxxxxxxx>
Sent: Montag, 12. Juli 2021 17:28
To: Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx>; ORACLE-L (
oracle-l@xxxxxxxxxxxxx) <oracle-l@xxxxxxxxxxxxx>
Subject: RE: sql_text during parsing
Hello Nenad,
any chance with a process state dump (or error stack trace)?
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: @OracleSK<
Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx> hat am 12.07.2021 17:25geschrieben:
WHEN (CASE WHEN (CASE WHEN (CASE WHEN ((CASE WHEN ((CASE WHEN (((CASE WHEN
Thanks!
I got a part of SQL (it’s chopped)
Any idea for getting the full text?
SQL> oradebug setospid 17876
Oracle pid: 107, Unix process pid: 17876, image: oracle@svdbp02p
SQL> oradebug current_sql
SELECT (CASE WHEN ((CASE WHEN (CASE WHEN (CASE WHEN (CASE WHEN (CASE
…
____________________________________________________
The problem might be with the parsing of a nested case.
Have to get the full text to experiment.
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